Somethings seriously wrong - you should be at/near full boost at 3.4k rpm

Turbo spins freely and doesn't make any noise so it's not bound. IC routing is "down and around", nothing terribly convoluted. BLT checked out ok. And while my timing is pretty conservative at this point, I don't think I'm going to get 1500rpm out of it. I've got my knock sensor mounted pretty low on the block, but once I move it up to the top of the block I'll get a little more aggressive with timing and see what comes from it. I'd definitely like the powerband to shift down about 2K rpm, though. May go to a smaller (T25/28) turbo if I can't get this one to do what I want.

This may sound dumb, but have you checked your IC pipes for leaks? How about the wastegate, is it even closed? That is really late spool for that turbo.

...aaaaannnnd yeah. BLT twice in the last month didn't turn up anything larger than throttle body shaft seals. BUT, for sh!ts and giggles I checked out the wastegate at lunch today. Loose as ----. Adjusted it about an hour ago and now I need to go out and pretty much redo my entire tune from 3Krpm to redline :facepalm:

At least I found the issue (or part of it). Will repost here when I've got that shizz retuned.

https://www.miataturbo.net/picture.p...pictureid=2503

Engine: '90 1.6L w/ 175k miles. 155-160's compression corrected for altitude(on a cheapo gauge), wet test was within a few psi on each cylinder, burns a little oil on decel (valves?) That's what I know about her.

Turbo: Mitsubishi TD04-15G (Greddy Kit)

Manifold: Stock Greddy Cast

Downpipe Size/Style: "Turbotony" 2.5" downpipe

Exhaust Size: 2.5 inch "topspeed" exhaust, (greddy ripoff of some kind)

Intercooler Core Size: 27x7x3 (or close)

Intake Manifold: stock

Headwork: Stock ( possibly leaky? ) valves.

Engine Management: MSPNP9093 - stock firmware, etc

Other Spoolin' Helpers/Hurters: turboxs(bleeder valve) MBC, exhaust leaks fixed (according to soapy water test with a clogged exhaust for extra backpressure), KN cone filter. Altitude is at 7000ft, for reference barometric pressure is at 80kpa so anything above that is positive pressure.

4th gear pull:

1900rpm : 82 kpa (0.3psi)
2200rpm : 87 kpa (1.0psi)
2500rpm : 90 kpa (1.4psi)
3000rpm : 96 kpa (2.3psi)
3250rpm : 103kpa (3.3psi)
3500rpm : 107 kpa (3.9psi)
3750rpm : 124kpa (6.3psi)
4000rpm : 138kpa (8.4psi)
4284rpm : 149kpa (10psi) (peak, limited by mbc from here on)

Funny how 10psi only gives me 149kpa, silly altitude. What do you guys think, should my spoolup rate be this effected by altitude? I've been trying to research spool loss vs altitude and have found it definitely has a pronounced effect, but exactly how much of an effect it should be having i don't exactly know. I guess the best way would be to do a datalog at sea level... sea level is faaaaar away.

EDIT: Since making this log I noticed my noisy MAP signal. I noticed that because of the noisy map signal my timing is a little erratic. I'm going to work on fixing this soon - Where should I relocate this vac line? I believe it's tee'd off of my FPR location now. Or is this noise a electrical issue? My RPM's etc were noisy when i first went MS but i fixed that by adding an extra ground.

That is better than I thought you'd show based on what you've been saying. Still better than mine by 2-300rpm since I addressed my wastegate problem.

Do you have a way to smooth the MAP signal? I was having an issue with mine until last month, then found I was able to smooth the input and all is well. Before this my IDCs were all over the place...graph looked like a sawblade and it was tough to get a solid response.

Yeah, it's not really horrible I'd say. However compared to some greddy kits I'm a good 500-800 rpms late for full boost.

You know, I'm not sure if there is a way to smooth the input via megasquirt, I'm going to look into this today and figure out what I need to do. I feel like the sawblade effect might be killing spool/power somewhat. In the log i can see my timing advance and retard back and forth all the way through a pull. I can't feel it in the car though, it feels like a good hard pull to redline. So this will be the next thing i work on.

Do you have an updated log since you tightened your wastegate? I'm curious to see that.

try running a 1/4" weedeater fuel filter inline with your map. it smoothed mine out quite a bit.

full spool of 194 kpa by 3700 RPM i 4th gear started pull @ ~2200

Engine: '95 escort GT 1.8L BP w/ 160kish miles.

Turbo: Mitsubishi TD05- big 16G

Manifold: home made 4 into 1

Wastegate: Tial 38mm mvs .9 bar spring water cooled. attached through the separated DP flange. IWG puck and arm removed. expanded IWG opening.

Boost control: wastegate spring

Downpipe Size/Style: home made 2.5" downpipe

Exhaust Size: 2.5 inch exhaust, hollowed cat, 2 cherry bombs for noise reduction

Intercooler Core Size: 19x7.25x3.5. 3" in and out

Intake Manifold: mazda 323 GTR gasket matched

Headwork: gasket matched intake and exhaust ports

Engine Management: MS 1v3.0

Other stuff: 3" charge pipe from turbo to i/c and from i/c to t/b. necks down to 2.5" at t/b. turbo XS RFL bov.

Your IDCs look like mine did before the smoothing. Do you MS guys have a way of logging airflow in addition to MAP?

No 4th gear pull yet, just some 3rd's from a couple tuning runs. Still need to retune and get my AFRs properly back in line before I repost. But the 3rd gear pulls look pretty much identical to my previous ones, just that everything is shifted to the left about 1K rpms. Way more responsive now...feels much better.

Fastiva, thanks for posting all that info. And great tip on the fuel filter...that's awesome.

only if they run maf sensor, otherwise no

I have done some reading about the whole noisy MAP signal thing, look like either a restrictor in line, or a "buffer" such as a fuel filter inline should help. I'm already running the line from one of the better locations (teed off the fuel rail FPR), so I' m going to try some other solutions this week. Will post up my results. Thanks!

Wow I don't know what I changed in the car (or the EBC settings) but my GT2560 spools very low now :P I love this turbo. Wish I had better IM

fifth gear pull:
1879 2.75
2022 3.48
2122 4.20
2276 5.24
2390 6.82
2456 6.96
2564 7.98
2662 9.72
2776 11.46 (wastegate opens)
2866 12.64
2996 15.38 (boost limit)

Engine: 2001 w/VVT, fresh rebuild with forged everything. Standard size SS valves, OEM springs, OEM cams.

Turbo: Garrett GT3076

Manifold: Header manifold

Downpipe Size/Style: 75mm

Exhaust Size: 80mm, no cat, ebay "carbon" muffler

Intercooler Core Size: I don't remember, it was rated for 600++ HP.

Intake Manifold: stock 99-00

Headwork: None.

Engine Management: Reverant Enhanced MS2, electronic boost control

Other Spoolin' Helpers/Hurters: VVT controlled, water injection per cylinder, 4th gear pull

Tuned by yours truly.

Went WOT at 3245 RPM.

https://www.miataturbo.net/attachmen...ine=1348774726

3307 rpm - 121.3kPa
3405 rpm - 145.8kPa
3508 rpm - 167.3kPa
3609 rpm - 193.9kPa
3708 rpm - 220.8kPa
3799 rpm - 243.7kPa
3894 rpm - 265.5kPa
3970 rpm - 281.7kPa
3998 rpm - 298.2kPa

So full boost (29psi) just before 4000rpm. :party:

Engine: 1.9L
Turbo: Borg Warner EFR 6758
Manifold: Wittyworks shorty tubular
Downpipe Size/Style: 3"
Exhaust Size: 3"
Exhaust Components: Magnaflow 11x5x22 "big one"
Intercooler Core Size: Precision 600HP
Intake Manifold: Stock
Headwork: Junkyard 99 head
Engine Management: MS3 + MS3X
Other Spoolin' Helpers/Hurters: EBC, LS2 truck coils
Trans & Rear End Ratio: 6-speed, 3.9 diff

Fifth gear pull (6speed, so 1:1)

RPM PSI KPA
2062 1.9 113
2083 2.0 114
2093 2.1 114.4
2098 2.2 115.1
2115 2.3 116.2
2131 2.5 117
2148 2.6 117.8
2157 2.7 118.6
2178 2.8 119.3
2192 2.9 120.3
2206 3.0 120.7
2228 3.2 121.9
2244 3.4 123.2
2261 3.5 123.9
2278 3.6 124.9
2280 3.7 125.7
2310 3.9 126.8
2316 4.0 127.6
2347 4.1 128.6
2338 4.2 129.3
2376 4.4 130.4
2381 4.5 131.3
2405 4.7 132.7
2417 4.9 133.6
2429 5.1 135
2455 5.3 136.6
2474 5.5 138.1
2484 5.7 139.6
2513 5.9 140.8
2518 6.1 142.2
2549 6.3 143.3
2554 6.6 145.6
2593 6.9 147.5
2590 7.0 148.5
2624 7.3 150.5
2633 7.5 151.9
2659 7.9 154.2
2677 8.3 157.4
2698 8.6 159.4
2724 9.0 162.3
2756 9.4 164.5
2756 9.7 167.1
2785 10.1 169.6
2813 10.4 171.6
2827 10.8 174.8
2864 11.2 177
2868 11.6 180.1
2914 12.0 182.8
2905 12.3 185.1
2959 12.9 188.6
2967 13.3 191.5
3007 13.9 195.8
3008 14.5 200.3
3085 15.4 206.5
3131 16.1 210.8
3182 17.8 222.7
3217 18.5 227.7
3249 19.7 235.8
3285 20.5 241.3
3338 21.5 248.2
3347 22.6 255.5
3404 23.5 262.1
3425 24.2 266.8
3463 25.0 272.3
3501 25.5 276

http://s95367906.onlinehome.us/photo...0rpm.png???Aaa
"sensor01" is turbine speed sensor.

Interesting. Do you know, what your readings relate to in terms of actual RPMs?
Also I would have expected the turbine speed to increase with higher engine RPM at the same boost. More air going into the engine should translate to higher turbine RPMs. That does not seem to be the case (very much anyway). Strange....

Very nice. Huge improvement over my previous 3076/log setup.
I'd love to see the pull started @ 2k though.

Engine: '00 1.8l
Turbo: BEGI 2854 churbo
Manifold: BEGi Cast "Directed Pulse"
Downpipe Size/Style: begi separated gasses, 2,75"
Exhaust Size: 2.5"
Exhaust Components: roadster sport 3 midpipe and rear.
Intercooler Core Size: 13x11x3"
Intake Manifold: Stock
Headwork: stock
Engine Management: EMB
Other Spoolin' Helpers/Hurters: MBC, very conservative timing.
Trans & Rear End Ratio: 5-speed, 4.1 LSD
Rear tire size: 195/50/15

FOURTH GEAR PULL:

RPM Boost(psi)
2000 2.6
2100 3.2
2400 4.8
2500 6.0
2600 6.8
2700 8.1
2800 8.7
2900 8.7
3000 8.7
3100 8.7
3200 9.4
3300 9.5
3400 9.5
3500 9.5
3600 9.5
3700 9.7
4000 10.1
4500 10.8
4800 11.9 boost limit.

Seems my wastegate/mbc is up to some funkyness.

Engine: '93 1.6l
Turbo: BEGI 2560
Manifold: BEGi Cast log
Downpipe Size/Style: begi separated gasses, 2,75"
Exhaust Size: 2.5" with cat
Intercooler Core Size: BEGi size 2
Intake Manifold: Stock
Headwork: none
Engine Management: MSPNP 1
Rear tire size: 205/45R16

RPM: MAP:
2500 118
2600 124
2700 127
2800 131
2900 135
3000 139
3100 144
3200 148
3300 151
3400 156
3500 163
3600 164
3700 168
3800 172
3900 179
4000 180 <- 12psi / boost limit

yes it is.
that doesn't look good AT ALL

It's RPM, in thousands. So in the screenshot it's at 128'100 rpm.

Your expectation of RPM rise is wrong. Also the RPM "window" is quite narrow. At 80k rpm it makes like 6psi but at 130k it's 26psi.
https://www.miataturbo.net/attachmen...ine=1350487178
See how difference between 2.4 and 3.2 pressure ratio is only 20k rpm? That's like 12psi worth of difference.


looks like a leak in your intercooler piping

Engine: '97 1.8l in a ’90 body
Turbo: CX GT25 Churbo (1yr and kickin’)
Manifold: Tubular CX
Downpipe Size/Style: Custom 2.5>3"
Exhaust Size: 3" straight back through the famous 5x22x11 Mag
Intercooler Core Size: 12x24x2.5
Intake Manifold: Stock
Headwork: none
Engine Management: MSPNP 1
Rear tire size: 205/45R16
Other helpers/hurters: Boost creep and clutch slip around 5k

Fourth Gear Pull...

RPM: MAP:
2500 -8.9psi
2550 -3.1psi
2600 0.1psi
2650 2.2psi
2700 4.3psi
2750 5.0psi
2800 6.4psi
2850 7.3psi
2900 6.9psi
2950 7.1psi
3000 7.1psi
3050 7.1psi
3100 7.6psi
3150 7.8psi
...and on through the range....

Alright. After my last post, and suggestions that something was amiss, I adjusted the wastegate and it made a huge difference. Retuned as well, added a little timing, and here's what I came up with. Probably the best I'm going to see with this shitty manifold and dp. Also, swapped in a 4.1 Torsen since then, as noted.

Using a Hallman manual boost controller.

Engine: '92 1.6L
Turbo: EvoIII 16g (Genuine Mitsubishi TD05H)
Manifold: eBay/OBX log
Downpipe Size/Style: eBay/OBX 2.5"
Exhaust Size: 2.5"
Exhaust Components: No cat, 14x9 Magnaflow
Intercooler Core Size: 19x10x2.5"
Intake Manifold: Stock
Headwork: Nope
Engine Management: Galant VR4 ecu & ECMLink in speed density
Other Spoolin' Helpers/Hurters: Ummm...eBay manifold and dp
Trans & Rear End Ratio: Stock 5-speed/4.1
Rear tire size: 205/50-15

4th Gear Pull

1736 0.2psi
1853 0.5
1961 0.7
2066 0.7
2159 0.9
2267 1.2
2351 1.4
2470 1.7
2556 1.9
2665 2.1
2761 2.4
2863 2.8
2971 3.3
3056 3.5
3154 4.2
3252 4.7
3351 5.4
3463 6.4
3571 7.5
3659 8.9
3750 10.3
3846 11.5
3952 12.9
4063 14.1
4153 14.8
4247 14.8
...

>> Old data below for comparison...thanks for suggesting my shiz wasn't right guys! Now I'm at full boost by the time I was making 2.5psi back then :loser:

3444 0.1
3544 0.4
3655 0.6
3754 1.3
3854 1.3
3955 1.5
4045 1.8
4144 2.5
4257 3.2
4366 4.4
4454 5.5
4551 6.7
4641 7.9
4741 8.8
4864 10.2
4954 10.9
5054 11.7
5137 11.9
5245 11.2
5350 11.2
5372 11.4
5466 11.4
5597 11.4

Finally got my exhaust leak fixed. Had the boost turned down today but this should give you a good trend line.

Engine: 1998 FE3 (Kia Sportage) 2.0L
Turbo: Borg Warner EFR6258
Manifold: DIY Octopus long tube.
Downpipe DIY 3"
Exhaust Size: 3"
Exhaust Components: No Cat, 15"x 8" Magnaflow and 36" Magnaflow
Intercooler Core Size: W18"xH11.5"xD3"
Intake Manifold: DIY Short runner
Headwork: Mild port, polish, polished combustion chambers.
Engine Management: Megasquirt 3 with expander.
Other Spoolin' Helpers/Hurters: Sequential fuel and spark. Tuned only by VEAL
Trans & Rear End Ratio: RX7 TII 5-speed/4.1 LSD
Rear tire size: 205/50-15

4th gear pull.
RPM - Boost psi
1688 .1
1704 .4
1724 .7
1749 .9
1777 1.1
1806 1.3
1832 1.5
1862 1.7
1895 1.8
1920 2
1994 2.5
2026 2.8
2057 3
2092 3.2
2126 3.4
2160 3.7
2192 3.9
2227 4.2
2262 4.5
2291 4.8
2333 5
2366 5.3
2405 5.6
2444 6
2484 6.3
2524 6.7
2565 7.1
2600 7.5
2644 8
2687 8.5
2741 9
2783 9.6
2822 10.3
2874 10.9
2931 11.8
2985 12.2
3031 12.8

Time to break spool records :vash2:

Engine: '99 1.9L 9.5:1 84mm supertechs
Turbo: GT2871r .64
Manifold: ARTech™ Ramhorn Top Mount manifold
Downpipe Size/Style: 3.5" homemade
Exhaust Size: 3.5" homemade
Exhaust Components: Magnaflow 5x11x22 muffler
Intercooler Core Size: 550mm x 225mm x 64mm
Intake Manifold: Honda ITR + 70mm TB
Headwork: stock BP4W
Engine Management: Adaptronic E420c
Other Spoolin' Helpers/Hurters: EBC
Trans & Rear End Ratio: 6-speed, 3.6 LSD
Rear tire size: 215/45/16

FIFTH GEAR PULL:

RPM Boost(psi)
2388 2.9
2479 3.9
2575 4.7
2640 5.9
2768 6.9
2868 8.1
2934 8.8
3088 10.5
3158 11.6
3253 13.0
3340 13.9
3384 15.0 :jerkit:

https://www.miataturbo.net/attachmen...ine=1366266367

Not bad for stock 99 head? I begin to open WG at 3K rpm, if I can keep that closed little bit longer I think it will spool quicker.

Engine: '93 1.6 Stock
Turbo: GT2560
Manifold: Begi log
Downpipe Size/Style: Begi separated gasses, 2,75"
Exhaust Size: 2.5" homemade
Exhaust Components: 2.5" muffler & 2.5"cat
Intercooler Core Size: Begi size #2
Intake Manifold: Stock
Headwork: stock
Engine Management: MS2X by Reverant
Other Spoolin' Helpers/Hurters: MBC, E85 Ethanol fuel
Trans & Rear End Ratio: 5-speed, 4.1 Kaaz LSD
Rear tire size: 205/45/16

4th gear pull.

RPM Boost (kpa)
1300 100
1880 120
2700 140
2870 150
3000 160
3250 170
3400 180
3580 190 kpa. (13.05psi)

https://www.miataturbo.net/attachmen...ine=1371726992

is your 1.6L built?

12.8:1 at 13psi is ambitious.

did you look at the spark timing?

Just noticed he's running E85. Ignore us.

aw :cry:

Not yet, I'm planning to get another shortblock to throw china-rods in. I'll have to cut the boost a bit to keep my engine in one piece.

Engine: 01' 1.8L with functional VVT
Turbo: Precision 4828
Manifold: BEGI cast style with EGR
Downpipe Size/Style: older BEGI non separated gasses
Exhaust Size: Flyin' Miata 2.5" with high flow cat and resonator
Other exhaust: Stock muffler for now.
Intercooler Core Size: 18"x8"x3"? (estimated from memory)
Charge Piping: 2" over the top style hotside, 2.5" behind headlight coldside.
Intake Manifold: Stock
Headwork: none
Engine Management: MS3x running a suboptimal tune
Rear tire size: 205/45R16
Other helpers/hurters: EBC limited to 160kpa

5th gear pull

RPM PSI
2359 0
2392 1.2
2569 2
2895 3
3318 4
3468 5
3599 6
3695 7.1
3767 8.1

I would have kept going but I ran out of clear highway. I would have hit 9.2psi in another hundred or or so RPM.
Log of pull is in my build thread. Also of note - 10psi is pretty much full boost for my build. This turbo should be putting down about 240hp max at that PSI but not at that RPM obviously.

Does anyone have data on pre/post tune? I'm curious what people are seeing as a change from tuning alone.

:party:

As I make changes I will post my msq's along with each update.

Engine: '01 1.8L stock
Turbo: Precision 4828 .64
Manifold: BEGI Cast
Downpipe Size/Style: 2"-2.5" old style BEGI
Exhaust Size: 2.5" Flyin' Miata midpipe with cat and resonator
Exhaust Components: 3" Magnaflow #12578
Intercooler Core Size: ?
Intake Manifold: stock
Headwork: stock
Engine Management: MS3x
Other Spoolin' Helpers/Hurters: EBC limited to 162kpa
Trans & Rear End Ratio: 6-speed, 3.9 LSD
Rear tire size: 205/45/16
5th gear pull

RPM PSI
2025 .6
2056 2
2092 3
2974 4
3288 5.1
3400 6
3503 7
3602 7.9
3655 8.8
3696 9.9

For comparison purposes, Virtual Dyno says that I should be making 185 lb/ft at 3696 rpm (and rising).

Engine: '96 1.8l in a ’93 body
Turbo: T3/T4B .48AR
Manifold: Begi log
Downpipe Size/Style: Crappy 2.5
Exhaust Size: 2.5 crush bent exhaust with straight through muffler
Intercooler Core Size: 9x24x2.5
Intake Manifold: Stock
Headwork: none
Engine Management: MS3X
Rear tire size: 205/40/17
Other helpers/hurters: stock 5spd and RX7 TII rearend 4.1

rpm psi
2007 1.1
2256 2
2515 2.7
2754 3.4
3012 3.8
3254 4.5
3511 5.4
3755 6.7
3897 7.2

New 1999 DIY build running 10PSI EBC controlled maximum boost with the ignition map that came with MS3 and some fuel autotune.
I will post a another log after the car gets tuned to see if there are spool changes.

Engine: 99 1/8L Supertech 8.5:1 Scott roods
Turbo: EFR 6258
Manifold: DIY long runner 1.5" primaries top mount
Downpipe Size/Style: DIY 3"
Exhaust Size: DIY 3"
Exhaust Components: resonator & Magnaflow Muffler
Intercooler Core Size: Water to air 6"x 8"x 3.5"
Intake Manifold: Stock
Headwork: stock
Engine Management: Megasquirt MS3 basic
Fuel: 93 pump gas ID1000 injectors
Other Spoolin' Helpers/Hurters: LS truck coils sequential
Trans & Rear End Ratio: 6-speed, 3.90 LSD
Rear tire size: 225/45-16

5th gear pull
RPM PSI TP %
1543 0.1 40
1581 0.5 70
1667 1.0 100
1797 1.9
1891 2.4
1997 2.7
2104 3.0
2226 3.2
2321 3.5
2429 4.0
2521 4.6
2624 5.4
2715 6.4
2804 7.4
2950 9.3
3023 10.0

Engine: 1.9 built 9:1
Turbo: TD05HR Twin Scroll 10.5T
Manifold: XS Power off a Evo 8
Down pipe: 3" Ho-made stainless
Ex Size: 3"
Exhaust Components: Dynomax VT
Intercooler: old FM
Intake: Gutted stock w/manual butterflies
Headwork: P&P +1 Supertech, Adj cam gears
Eng Management: Rev's MS2+
Fuel: 93oct 900cc inj
Other helpers/hurters: LS2 coils,Hallman MBC, conservative timing, intake S-bend removed
Trans & rear end: 6spd, 3.63
Rear Tire: 225 40 17

RPM KPA PSI

2433 100 0.0
2551 121.0 2.3
2686 136.6 5.2
2898 164.7 9.2
3086 185.4 12.4
3233 203.8 14.8
3369 221.0 17.7
3501 232.8 19.3
3682 234.4 19.3
3824 231.0 19.0
3985 232.9 19.2
4232 245.2 21.0
4394 239.3 20.1
4474 231.9 19.1
4724 220.3 17.4
4861 227.2 18.6
5015 234.8 19.5
5319 231.1 19.0
5609 227.1 18.6
5968 241.5 20.1

Engine: ’93 1.6 stock
Turbo: TD04L
Manifold: Custom
Downpipe Elbow 2.5
Exhaust Size: stock downpipe, test pipe, 2.25 catback,
Intake Manifold: Stock
Headwork: none
Engine Management: MS2X
Other helpers/hurters: EBC

rpm map
2007 110
2290 120
2505 130
2685 140
2860 150
3057 160
3233 170
3476 180
3689 190
3950 200

Engine: '99 1.8L Stock
Turbo: TD04L-13T
Manifold: 1 1/4" Schedule 40 LOG
Downpipe Size/Style: Modified 1.6L BEGI Segregated
Exhaust Size: 3" with Mag high flow Cat and Mag 5x22x11
Intercooler Core Size: 5.5x22x2.5
Intake Manifold: Stock
Headwork: none
Engine Management: MS3-Basic
Rear tire size: 195/50-15
Other helpers/hurters: 8 PSI Waste Gate Only

Fourth Gear Pull...

RPM: MAP (psi):
1320 0.3
1400 0.7
1500 1.0
1700 1.6
2000 2.6
2400 4.3
3000 5.9
3500 5.9
4000 6.6
4500 6.9

See This post for EBC at 12 PSI

Engine: 01' 1.8L with functional VVT
Turbo: Precision 4828
Manifold: BEGI cast style with EGR
Downpipe Size/Style: older BEGI non separated gasses
Exhaust Size: Flyin' Miata 2.5" with high flow cat and resonator
Other exhaust: Stock muffler for now.
Intercooler Core Size: 18"x8"x3"? (estimated from memory)
Charge Piping: 2" over the top style hotside, 2.5" behind headlight coldside.
Intake Manifold: Stock
Headwork: none
Engine Management: MS3x
Rear tire size: 205/45R16
Other helpers/hurters: Open Loop EBC, pull was done on slight incline.

This tune was about 230rwhp and 232rwtq on the dyno.


5th gear pull

RPM PSI
2011 -1
2159 0
2321 1.1
2534 2
2749 3
2987 4
3161 5
3333 6
3442 7
3585 8
3728 9
4381 10
4490 11.1
4675 12

[7/10/14 update] Just something I noticed... I am trying to limit my torque to levels safe with a stock motor so about 9psi and 3700 rpm I am starting to limit my boost with the EBC. If I weren't doing so I imagine that my spool would look a little more conventional albeit a bit late compared to others.

Engine: 1.9L forged 8.5:1 comp
Turbo: 2876
Manifold: Custom
Downpipe Size/Style: 3" merged w/ EWG
Exhaust Size: 3"
Exhaust Components: SS Pipe
Intercooler Core Size: BIG
Intake Manifold: Stock
Headwork: Porting/Polishing, valve job, and what not.
Engine Management: Mmm Squirt
Other Spoolin' Helpers/Hurters: Running wastegate spring only.
Trans & Rear End Ratio: 6-speed, 4.3
Rear tire size: 205/45-16

FIFTH GEAR PULL:

RPM Boost(PSI)
2200 - 2.1
3228 - 6.7
3526 - 8.0
3650 - 9.4
3729 - 10.4
3800 - 11.4
3955 - 14.2
4046 - 15.3
4612 - 16.8
5000 - 16.1
5574 - 15.9
6000 - 17.7
6156 - 18.0 (peak)
6500 - 15.4
6788 - 14.5
7006 - 14.7

:jerkit:
https://www.miataturbo.net/attachmen...ine=1404973365

Added my self and soviet added.

https://www.miataturbo.net/attachmen...ine=1404977044

Catfish 1.6
 

JDM 1.6 of indeterminate age or mileage
MSPNP2
FM Log
2560 Churbo, balanced to 150k
Custom 2.5" dump pipe exiting to 2.5" side pipe
FM IC with external BOV
6 speed (dyno done in 5th gear)
245/35-17" rims (23.7" diameter)

Mustang Dyno--this one has back to back dyno's with the DCSPort dynojet and is 20% conservative

Filter value is 6 out of 50 (not much plot line smoothing)

Adjusted "dynojet" numbers:

190whp = 228whp
170wtq = 204wtq

Engine: 1.8L '00 stock BP (not vvt)
Turbo: chrubo "disco potato" compressor: 3" inlet 2" outlet 0.6 A/R 48mm trim turbine: 0.64 A/R 76mm trim
Manifold: begi S4 style
Downpipe Size/Style: 60mm merged wastegate 42mm
Exhaust Size: full 60mm no cat no resonator, nothing!!!
Exhaust Components: magnaflow 60mm with dbkiller
Intercooler Core Size: 550 x 140 x 65 ebay intercooler
Intake Manifold: Stock
Headwork: none
Engine Management: emanage blue (temporary, waiting money for rev ms)
Other Spoolin' Helpers/Hurters: nothing, only wastegate with original compressor signal
Trans & Rear End Ratio: 6-speed, 3.909
Rear tire size: 195/50-15

FIFTH GEAR PULL:

RPM Boost(PSI)

2179 - 0
2481 - 1.45
2760 - 2.18
3087 - 3.63
3447 - 4.35
3860 - 5.8
4277 - 9.43
4394 - 10.15
4655 - 11.31

after 5000 rpm begins to drop down to 9.40 psi at 6500 rpm

Engine: 01' 1.8L with functional VVT
Turbo: Precision 4828
Manifold: BEGI cast style with EGR
Downpipe Size/Style: older BEGI non separated gasses
Exhaust Size: Flyin' Miata 2.5" with high flow cat and resonator
Other exhaust: Stock muffler for now.
Intercooler Core Size: 18"x8"x3"? (estimated from memory)
Charge Piping: 2" over the top style hotside, 2.5" behind headlight coldside.
Intake Manifold: Stock
Headwork: none
Engine Management: MS3x
Rear tire size: 205/45R16
Other helpers/hurters: Closed Loop - in the process of tweaking.
Slight up-hill pull so it may shift the boost earlier than normal.

5th gear pull

RPM PSI
2105 1
2209 2
2373 3
2598 4
2801 5
3076 6
3314 7
3426 8
3549 9
3680 10

Here is my turbo spool data for my BEGi S6 kit GT2860 turbo with Tial 38mm external wastegate with 8.7 psi spring. Full 3" catless exhaust is causing boost creep up to 11.5 to 12.0 psi even with the 8.7 psi spring in the wastegate.

Started runs from 1500 RPM up to a hair over 7000 in 4th gear on a 6 speed with 4.3 rear gear.

2000 1.5 psi
2500 2.7 psi
3000 4.5 psi
3500 7.5 psi Wastegate is cracking open here with the 8.7 psi spring.
4000 10.0 psi
4500 10.8 psi
5000 11.2 psi
5500 11.7 psi
6000 11.3 psi
6500 10.6 psi
7000 11.2 psi

I am wondering if with a manual boost controller I can improve spool up without making the boost creep worse.

Keith

Engine: 2000, 1.8L
Turbo: GT2560R
Manifod: ?
Exhaust Components: Racing Beat full exhaust
Intercooler Core Size: 18"x12"x3"
Intake Manifold: Stock
Headwork: Mild Porting
Engine Management: Adaptronics
Other Spoolin' Helpers/Hurters: Eagle rods, Wiseco pistons
Trans & Rear End Ratio: 5-speed
Rear tire size: 195/50r/15

4th gear pull @ 18psi

https://www.miataturbo.net/attachmen...ine=1414283308

What is your actual boost vs RPM? I just installed this same turbo and am curious as to how it looks on your 1.8 compared to my 1.6.

Also, that spot where your AFRs flatlined is hurting your spool. Do you know how fat it actually was there? Probably in the 9's? That dip in the TQ curve from 35-4500RPM is related. Any particular reason you made it that rich when you were tuning it?

I got the car the way it sits. I had a shop run a diagnostic dyno to see where it stands. We were surprised at the numbers but I have to get the software for adaptronics so we can adjust fire. That was just a diagnostic run.

Engine: 1999, 1.8L
Turbo: TD04HL-20T-6cm (OEM Caliber SRT4 turbo, with 6cm housing)
Manifold: Custom log
Exhaust Components: 3" DP, 2.5" back, 1 glasspack, Roadstersport3 muffler
Intercooler Core Size: 11"x12"x3"
Intake Manifold: Stock
Headwork: Stock
Engine Management: DIYPNP, sequential fuel
Other Spoolin' Helpers/Hurters: EBC, ID1000's, Toyota COP
Trans & Rear End Ratio: 5-speed, 4.30
Rear tire size: 205/40/16

3th gear pull @ 9psi

I have some work to do tuning the EBC between 3-4000 rpm, I can definitely reach full boost by around 3200.

https://www.miataturbo.net/attachmen...ine=1415553166

Mr aceduce802, perhaps you'd like to share with the class why we are not seeing a boost/rpm comparison? And furthermore, why in god's name did you choose 3rd (or 3th gear as you put it) , as clearly this isn't a 1:1 ratio as stated at the beginning of this thread?
We enjoy people thinking outside the box on their turbo builds, but as an engineer you should know to keep the data similar for comparison. :facepalm:

Boost/rpm is shown in the bottom graph, the dotted line. This is a log in 3rd because I haven't had the chance to safely log a 4th gear pull. There are others in the thread that have posted 3rd gear pulls, so there is data to compare to. However, I do understand that I don't have to take it to redline in fourth gear to show spool, so I will grab that data.

if you want your data to be relevant please do it in 1:1 gear and start at 2k rpm.

please. otherwise its pretty much useless

Engine: 1999, 1.8L
Turbo: TD04HL-20T-6cm (OEM Caliber SRT4 turbo, with 6cm housing)
Manifold: Custom log
Exhaust Components: 3" DP, 2.5" back, 1 glasspack, Roadstersport3 muffler
Intercooler Core Size: 11"x12"x3"
Intake Manifold: Stock
Headwork: Stock
Engine Management: DIYPNP, sequential fuel
Other Spoolin' Helpers/Hurters: EBC, ID1000's, Toyota COP
Trans & Rear End Ratio: 5-speed, 4.30
Rear tire size: 205/40/16

4th gear pull @ 9psi

RPM Boost(psi)
2240 2.3
2310 2.9
2405 3.9
2522 4.9
2608 5.7
2713 6.6
2815 7.7
2904 8.3
3000 8.9

9 psi until redline

Much better. And looks like the turbo comes on fairly quick, very similar to a t25

Yes I'm very happy with the response. Unfortunately I haven't been able to find a compressor map for the 20t, but I used a 19t map and it stays in the efficiency range just like a gt2560r, except it seems to have more potential at higher boost levels. I'm way too excited to build the motor, throw in a 6 speed, run a 3" exhaust, and turn it up. I was planning on doing a full 3" back exhaust first, but I don't see the real reason at this point, if I'm already at 230 whp with good spool.

Engine: 2002 VVT, forged everything
Turbo: Precision 4828
Manifold: BEGI log
Exhaust Components: 3" DP, 3" back, resonator and big magnaflow
Intercooler Core Size: 11"x12"x3"
Intake Manifold: stock VICs
Headwork: Stock
Engine Management: Rev MS3
Other Spoolin' Helpers/Hurters: DIY's EBC, ID650's, LS3 coils
Trans & Rear End Ratio: 6-speed, ??? rearend
Rear tire size: 175-14 snow tires!

5th gear pull @ peak of 21.77psi

RPM Boost(psi)
2625 0.88 -TPS hits ~100%. Little high, but this was the latest log
2721 1.99
2820 3.23
2922 4.25
3014 5.03
3105 5.99
3266 7.8
3339 8.57
3414 9.6
3521 11.05
3753 14.94
4031 18.22

Engine: 91 1.6
Turbo: T3 Churbo .42/.48 A/R, v-band outlet/ported IWG
Manifold: Tacotaco
Downpipe Size/Style: V-band 2.5" to 3.00"
Exhaust Size: 2.5" to 3"
Exhaust Components: Magnaflow 5x11x22 Muffler
Intercooler Core Size: 5.5x27x2.5"
Intake Manifold: Stock 1.6
Engine Management: Megasquirt "DIYPNP"
Other Spoolin' Helpers/Hurters: LS2 Coils, wastegate pressure
Trans & Rear End Ratio: 5-speed, 4.3 VLSD
Rear tire size: 205/50-15

4th Gear Pull

RPM Boost PSI
2000 0.3
2100 0.8
2200 1.4
2300 2.1
2400 2.9
2500 3.6
2600 4.5
2700 5.3
2800 5.9
2900 6.5
3000 6.8
3100 7.0 <-- 7psi Churbo wastegate
3250 7.1
3500 7.2
3750 7.1
4000 7.2
4250 7.2

https://www.miataturbo.net/attachmen...ine=1417665216