Is it just me or is this Excell chart screwed up. The RPM on the data and the charts don't match. Or am I missing something.

Engine: '96 1.8L -- stock
Turbo: Garrett GT2554r
Manifold: BEGi Cast "Directed Pulse"
Downpipe Size/Style: BEGI SGSS
Exhaust Size: this and that 2.5" Magnaflow four outlet...no cat ..shhhhh
Exhaust Components: lost my CAT
Intercooler Core Size: BEGI #2
Intake Manifold: Stock
Headwork: Factory stock
Engine Management: Megasquirt MSPNP9697 HiRes
Other Spoolin' Helpers/Hurters: heavy right foot....and a 17lb flywheel from a 99??
Trans & Rear End Ratio: 5-speed, 4.1 torsen
Rear tire size: 205/40 17 bfg G-force sport - 13lb G-racing wheels

157torque (5700 rpm) and 184Hp (6100 rpm)

2723 0.30
2826 1.17
2906 2.33
2983 3.49
3067 4.50
3166 5.30
3265 6.68
3354 7.84
3460 8.28
4402 9.15

Engine: '92 1/6L
Turbo: China 2871
Manifold: Absurd flow 1.6 replica
Downpipe Size/Style: 3.0" bell mouth
Exhaust Size: 3"
Exhaust Components: Magnaflow Muffler
Intercooler Core Size: 29x9x3
Intake Manifold: Stock
Headwork:none
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Toyota COPs / stock intake mani
Trans & Rear End Ratio: 5-speed, 4.1 LSD
Rear tire size: 205/50/15

FOURTH GEAR PULL:

RPM Boost(psi)
3000 4.5
3250 6.10
3500 8.0
3750 11.5
4000 15.5
4250 18.1
4500 to redline 20-22
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Engine: '97 1.8L
Turbo: GT2560R Ceramic Coated
Manifold: FM w/ Ceramic Coated
Downpipe Size/Style: FM 2.5"
Exhaust Size: 2.5"
Exhaust Components: FM Turbo Exhaust
Intercooler Core Size: Large Size FM Intercooler
Intake Manifold: Stock
Headwork:none
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Bad street tune. No CAT (off road use only I swear). 10.3lb flywheel
Trans & Rear End Ratio: 5-speed, 4.1 KAAZ LSD
Rear tire size: 205/50/15

FOURTH GEAR PULL:

RPM Boost kpa (psi)
2100 114kpa (2.03psi)
2240 121kpa (3.04psi)
2401 129kpa (4.20psi)
2633 140kpa (5.80psi)
2805 151kpa (7.39psi)
3002 163kpa (9.13psi)
3188 173kpa (10.58psi)

Log attached

not bad
thats the "godspeed" turbo right?
is it internally gated?

No, got it from speedy racer. Yes internal waste gate.
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Engine: '91 1/6L
Turbo: DSM 14B
Manifold: Ebay log
Downpipe Size/Style: Single tube 2.5"
Exhaust Size: 2.5
Exhaust Components: glasspack and muffler
Intercooler Core Size: 27"x7"x3"
Intake Manifold: Stock
Headwork: None
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: EBC,
Trans & Rear End Ratio: 5-speed, 4.1 RX7 LSD
Rear tire size: 225/45-15

FOURTH GEAR PULL:

RPM Boost(psi)
2800 1.7
2900 3.6
3000 4.2
3100 5.4
3200 7.0
3300 8.7
3400 10.5
3500 12.7
3600 14.8
3700 14.9

Engine: '92 1.6L
Turbo: T3/T4e 50 trim, .60/.48 A/R
Manifold: JGS 4into1 1.375" runner
Downpipe Size/Style: separated gas 2.5"
Exhaust Size: 2.5
Exhaust Components: Dynomax resonator & Dynomax muffler
Intercooler Core Size: 18"x6"x3.5"(Precision 350HP)
Intake Manifold: Stock
Headwork: full port, de shrouded, blended bowl, gasket matched, doweled
Engine Management: MS1-hi res 10g, Lc1
Other Spoolin' Helpers/Hurters: Toyota COPs,Fidanza flywheel
Trans & Rear End Ratio: 5-speed, 4.3 LSD 1.6 diff.
Rear tire size: 205/40-17

FOURTH GEAR PULL:

RPM Boost(psi)

2093: 0.87
2207: 1.01
2578: 2.61
2848: 3.91
3069: 5.22
3342: 6.23
3574: 8.12
3866: 10.01
4012: 12.18
4202: 15.67
4307: 18.13
4468: 19.30<<<<<<:bigtu:

Here's my updated data.

Engine: 01' 1.9L
Turbo: Garrett GT 3076
Manifold: Tubular
Downpipe Size/Style: 3"
Exhaust Size: 3"
Engine Management: Hydra
Other Spoolin' Helpers/Hurters: MBC
Trans & Rear End Ratio: 6-speed, 3.6 gears
Rear tire size: 225-45-15's

FIFTH GEAR PULL:

RPM Boost(psi)

2100 1 PSI
2600 2 PSI
2900 3 PSI
3000 4 PSI
3150 5 PSI
3400 8 PSI
3700 14 PSI

Edit: Mine is a 57 trim compressor. I don't know why I put 50 up there.

i love that this is still an ongoing thread. next time i'm at my shop i'll see if i have any decent datalogs from my greddy setup with begi dp, to add to the mix.

Engine: '90 1.6L
Turbo: TD04h-19T Ceramic Coated
Manifold: Greddy w/ Ceramic Coated
Downpipe Size/Style: Racing Mazda 2.5"
Exhaust Size: 2.5"
Exhaust Components: Enthuza budget turbo racer, No cat
Intercooler Core Size: 22x9x3
Intake Manifold: Stock
Headwork: None
Engine Management: Link ECU
Other Spoolin' Helpers/Hurters: MBC, T28 wastegate
Trans & Rear End Ratio: 5-speed, 4.1
Rear tire size: 205/40/16

THIRD GEAR PULL:

RPM KPA
2349 96kpa
2514 109kpa
2756 120kpa
3003 133kpa
3246 143kpa
3521 158kpa
3780 176kpa
4010 201kpa

I think next time I should do it in 4th gear to get faster spool

Attachment 197005

Engine: '91 1/6L
Turbo: SR20 T25
Manifold: Custom Tubular Short Runner
Downpipe Size/Style: 3" Bellmouth
Exhaust Size: 3"
Exhaust Components: 24" Resonator, Magnaflow Muff, No cat
Intercooler Core Size: 18"x12"x3" (I think, cant remember)
Intake Manifold: Stock
Headwork: Stock
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: MBC, Pre-turbo exhaust leak
Trans & Rear End Ratio: 5-speed, 4.1 LSD
Rear tire size: 205/45-16

FOURTH GEAR PULL:

RPM Boost(psi)
1500 1.451
1700 2.031
2000 2.757
2200 4.063
2500 4.353
2700 5.949
2800 6.530
2900 7.691
3000 8.561
3100 10.157
3200 11.028
3300 11.318
3400 12.189
3500 13.060

http://img.photobucket.com/albums/v6...ostDataLog.jpg

Not really that happy with it. Cant wait to resurface my head flange and re-test.

Specs from both Godspeed and SpeedyRacer gt28 are the same, on paper. I wonder if they're both physically the same measurements as well.

Hope I can contribute soon with my spul up times. I will use a MHI td04hl-16t-7 this time. None mention cams and cam settings? Are you all running stock cams and settings? ciao/Lennarth

most of us run stock cams and cam settings, yes. Those who aren't mention it typically.

Hope I can contribute soon with my spul up times. I will use a MHI td04hl-16t-7 this time. None mention cams and cam settings? Are you all running stock cams and settings? ciao/Lennarth

no, none of us run stock cam or cam settings. Those who are, mention it. Typically.

spool up rates! my first post here!
 

hi my name is pete
the turbo scene is nothing new to me
ive been turbocharging or trying to at least since i was 15

first reliable turbo car was my 96 civic hatch at age 19

im a member at home made turbo.com

im glad to be here

ive just finished building a set up on a friends car. my first turbo miata project! here is some specs. ill post pics soon!



Engine: '91 1.6L
Turbo: T25 .48/.49 AR
Manifold: ebay obx ss 4-1
Downpipe Size/Style: Single tube 2.5"
Exhaust Size: 2.25"
Exhaust Components:1 cherry bomb
Intercooler Core Size: 25x2.5x6.5
Intake Manifold: Stock
boost level 6psi
ignition timing 5* btdc

Engine Management: junkyard turbo-mx6/ford probe fuel pump + 12:1 fmu

tire size: 195/60/14



spools extremely fast makes 5-6 pounds at part throttle before 3k in 2nd gear full throttle spools a bit quicker

car still needs more fuel im running 5 deg btc timming at base and still runs a little lean so im waiting on a walbro 255 HP (high pressure) fuel pump so i can have enough fuel to turn up the boost.

Engine: '92 1.6L
Turbo: 2871R 0.86
Manifold: Lovefab hybrid long/short runner tubular
Downpipe Size/Style: lovefab 3"
Exhaust Size: 3"
Exhaust Components: high flow cat, magnaflow muffler (straight through 14")
Intercooler Core Size: 25x2.5x6.5
Intake Manifold: Stock
boost level 9.5 psi

Engine Management: AEM ems with ID 750;s

tire size: 195/50/15

2000 -2.2psi
2200 -2.1
2700 0.9
3200 2.6
3600 4.1
3800 4.8
4000 5.2
4200 6.0
4400 6.5
4600 8.0
4650 9.5
4900 9.5
6000 9.5
7100 9.5

when i run ebc, the boost spools muuuuch harder.

Engine: '99 1.8L, Wiseco (8.8:1), Carillo, 1mm Over Valves, 1mm Overbore, lots of port work.
Turbo: 2560
Manifold: Early FMII Cast Manifold
Downpipe Size/Style: Early FMII Downpipe with slip joint.
Exhaust Size: 2.5??
Exhaust Components: FM Turbo Duals
Intercooler Core Size: Small early FMII Kit IC
Intake Manifold: Port matched stock.
Boost level: 200kpa

Engine Management: Autronic SM4

Tire size: 205/45/15, 5-Speed with 3.909 Final Drive

Run was in 3rd gear, rolled onto the throttle at an indicated 2500, log says I wasn't WOT until 2800.

2832 117.0
3000 138.2
3250 163.2
3427 187.8
3534 197.5
3635 201.4
3877 197.0
4023 193.8

The rest of the way up the revs boost wanders between mid to high 190's. It was a tuning run that I thought was good enough to post. I've added a bit of fuel, and I might bump up my boost offsets just a hair. And of course this run was performed on a private closed course.

Attachment 194325

Engine: Stock '99 1.8
Turbo: Chinacharger 2560 compressor .60 a/r turbine .64 a/r
Exhaust: Ebay S4 knockoff
2 1/2 downpipe
Borla Sport muffler
no cat
FMIC: 18x12x3
Intake Manifold: Stock
Engine Management: EMB, RX7 460cc
Boost Level: 12.5 psi
Boost control: Turbosmart Boost Tee
Tire size: 205/45/16

Forth Gear pull :
2,836 - 3.48 psi
2,926 - 5.51
3,048 - 7.68
3,188 - 9.93
3,272 - 10.66
3,385 - 12.04

Engine: Stock 1991 / 1.6L
Turbo: GT2554
Exhaust: 3" SSGDP, FM Cat, FM Dual
FMIC: Old begi (small w/convoluted tubing)
Intake Manifold: Stock
Engine Management: MS2, RX7 460cc
Boost Level: 8psi
Boost control: 5-8psi can, removed MBC due to overboost in cold
Tire size: 195/50/15
Ambient air temp: 45*F

4th Gear Pull:
1835 - 0 psi
2036 - 1.956 psi
2245 - 3.231 psi
2437 - 4.492 psi
2644 - 5.840 psi
2832 - 7.144 psi
2999 - 7.275 psi

Engine: '99 1.8L, Wiseco (8.8:1), eagle h-beam 1mm
Head porting
Turbo: td05-16g from EVO IX twin scroll
Manifold: Custom tubular
Downpipe Size/Style: 3"
Exhaust Size: 3"
Intake Manifold: Custom with short runners
Boost level: 280kpa
Engine Management: DIYPNP

Tire size: 215/40/17, rx7 fc tranny with 4.1

2500 - ????
3000 - 18 psi
3300 - 25 psi
3500 - 28 psi (max)

The spool is even better than a friends td04 and the pulls are with 4th gear.

Can't follow the rules? 1:1 gear, please, or don't post your data.

fixed

Engine: 1995 1.8L
Turbo: SR20 T25
Manifold: begi cast
Downpipe Size/Style: 2.5", 1.5" diverted wastegate
Exhaust Size: 2.5"
Exhaust Components: catless, enthusa exhaust (magnaflow straight through)
Intercooler Core Size: 28"x5.5"x2.5"
Intake Manifold: Stock
Headwork: stock
Engine Management: Megasquirt PnP
Other Spoolin' Helpers/Hurters: GM EBC, minor boost leak at bov and throttle body shaft
Trans & Rear End Ratio: stock 5-speed, stock open diff
Rear tire size: 205/50/15

FOURTH GEAR PULL:

RPM Boost(psi)
1866 0.000
1993 1.015
2045 1.451
2108 1.886
2157 2.176
2201 2.612
2258 3.337
2298 3.482
2356 3.772
2416 4.208
2457 4.788
2508 5.659
2558 5.659
2612 5.949
2652 6.384
2731 7.255
2816 8.271
2873 8.416
2933 9.867
2959 10.157
3013 11.609
3079 11.609

Engine: '91 1.6L
Turbo: T3 60 .48 A/R exhaust turbine housing
Manifold: tacotaco cast iron
Downpipe Size/Style: Single tube 2.5
Exhaust Size: 2.5"
Exhaust Components: Flowtech Warlock Muffler
Intercooler Core Size: No Intercooler
Intake Manifold: Stock
Headwork: None
Engine Management: Megasquirt2
Other Spoolin' Helpers/Hurters:
Trans & Rear End Ratio: 5-speed, 4.3 open
Rear tire size: 185\65R14

FOURTH GEAR PULL:

RPM Boost(psi)
2253 1.37
2303 1.66
2400 1.92
2507 2.37
2602 2.85
2706 3.5
2805 4.17
2919 5.17
3005 6.01
3098 6.7
3216 6.94
3300 7.46
3425 7.58
3500 7.59

Engine: '90 1.6L
Turbo: 16g evo III clipped/ported IWG
Manifold: modified log
Downpipe Size/Style: 2.5"
Exhaust Size: 3"
Exhaust Components: metal cat 2.5" in 3" out, stainless glasspack
Intercooler Core Size: stock SRT4 not sure of size
Intake Manifold: Stock
Headwork: None
Engine Management: 90 93 pnp
Other Spoolin' Helpers/Hurters: 4lb wastegate can, mbc
Trans & Rear End Ratio: 5-speed, 3.90 torsen
Rear tire size: 195 50 15

FOURTH GEAR PULL:
rpm psi
2000 .5
2500 3
3000 4.5
3500 7
4000 11.5


in the middle of tuning with a new fuel pump. max boost is currently 11.5. I used to have a 14lb WG can and boost came on earlier, but I like having more adjustability even if it blows open the door and sacrifices spool down low. making more boost at lower rpm doesn't seem to make any difference in torque. it comes on pretty strong between 3500 and 4000rpm though.

Engine: '95 1.8L
Turbo: 2554R
Manifold: FM cast (old)
Downpipe Size/Style: 2.5" FM (old)
Exhaust Size: 2.5"
Exhaust Components: old FM for a 1.6, FM cat
Intercooler Core Size: CX Racing 28x7x2.5 (ebay)
Intake Manifold: Stock
Headwork: None
Engine Management: MS1
Other Spoolin' Helpers/Hurters: 8lb wastegate can, mbc, Toyota COPs
Trans & Rear End Ratio: stock
Rear tire size: 205 50 15

FOURTH GEAR PULL:
RPM Boost
1785 0.145
1927 1.16
2105 2.61
2189 3.48
2282 4.35
2389 5.08
2496 6.24
2618 7.54
2663 8.42
2745 9.14
2804 10.01
2877 11.03
2950 11.89
3025 12.62
3099 13.35
3170 13.93
3272 14.22
3340 14.65

Engine: '99 1.8L
Turbo: GT2560R
Manifold: ARTech, short tubular
Downpipe Size/Style: 3" separated gasses, WG recircs 20" ish down the pipe
Exhaust Size: 3" ARtech stuffs
Exhaust Components: 1 x magnaflow straighthru
Intercooler Core Size: 11"x11"3"
Intake Manifold: Stock
Headwork: Stock
Engine Management: DIYPNP
Other Spoolin' Helpers/Hurters: High flow cat in exhaust
Trans & Rear End Ratio: 5-speed, 3.9 LSD
Rear tire size: 225/45-15

EBC undershoots a little when I go WOT that low in the gear, but here's my contribution to chickenscratch.jpg

FOURTH GEAR PULL:

2000 1.07
2100 2.08
2200 3.57
2300 4.76
2400 6.01
2500 6.73
2600 7.36
2700 7.82
2800 8.51
2900 9.63
3000 11.02
3100 12.87
3200 13.64
3300 14.65
3400 15.39
3500 15.81

Attachment 189353

Engine: 1994 1.8L
Turbo: Garrett T28 from Pulsar GTI-R
Manifold: Flyin Miata Cast FM2
Downpipe Size/Style: BEGI Seperated Gasses with 3" exit with dumped WG pipe
Exhaust Size: 2.5"
Exhaust Components: 2.5"
Intercooler Core Size: 550x225x65 mm
Intercooler Plumbing Size: 2.25"
Intake Manifold: Stock
Headwork: stock
Engine Management: MSPNP
Other Spoolin' Helpers/Hurters: Stupid little K&N
Trans & Rear End Ratio: '94 5 speed, TorSen diff
Rear tire size: 195/50r15

FOURTH GEAR PULL:

RPM Boost(psi)
2350rpm 0psi
2520rpm 1.1 psi
2643rpm 2.0 psi
2894rpm 3.9 psi
3200rpm 6.2 psi
3368rpm 8.1 psi
3600rpm 10.0 psi
3868rpm 12.4 psi

Engine: '91 1.6L
Turbo: T3 60 .48 A/R exhaust turbine housing
Manifold: tacotaco cast iron
Downpipe Size/Style: Single tube 2.5
Exhaust Size: 2.5"
Exhaust Components: Just downpipe
Intercooler Core Size: Stock Evo 8 FMIC
Intake Manifold: Stock
Headwork: None
Engine Management: Megasquirt2
Other Spoolin' Helpers/Hurters: MS2 EBC
Trans & Rear End Ratio: 5-speed, 4.3 open
Rear tire size: 185\65R14

FOURTH GEAR PULL:

RPM Boost(psi)
2243 1.92
2296 2.22
2398 2.83
2500 3.38
2599 3.90
2717 4.64
2803 5.28
2914 6.24
3005 7.05
3093 8.04
3233 9.40
3311 10.04
3424 11.23
3500 12.20

Engine: '95 1.8L
Turbo: Borg Warner EFR 6258
Manifold: Custom short stainless tubular
Downpipe Size/Style: Custom 3 inch
Exhaust Size: 3 inch
Exhaust Components: 5x11x22 "Biggest" magnaflow
Intercooler Core Size: Precision 600 hp, 31.50L x 8.00H x 3.50D
Intake Manifold: Stock
Headwork: none
Engine Management: diypnp
Other Spoolin' Helpers/Hurters: wastegate pressure, NO EBC or MBC
Trans & Rear End Ratio: 5-speed, 4.1 open
Rear tire size: 195/60R14

FOURTH GEAR PULL:

RPM Boost(psi)
1954 .304
2107 2.07
2206 3.21
2311 4.22
2428 5.55
2543 6.67
2602 7.25

Right above the 7.25 psi the wastegate starts to open, so in the log boost tapers off. I'm out of town until sunday, but when I get back I might readjust the wastegate to get some data up to about 10 psi.

Spools like a 2560R on a '99 head, except it's on a '94 head and the tune is so rich I could smell fuel vapors in the car after doing long pulls.

EFR6258 is bauce.

Engine: '01 1.8L w/VVT
Turbo: Garrett 3076 w/antisurge machining
Manifold: Custom stainless header
Downpipe Size/Style: Custom 76mm
Exhaust Size: 80mm
Exhaust Components: Single fleabay muffler
Intercooler Core Size: don't remember
Intake Manifold: Stock 99-00
Headwork: Stainless valves, stock size
Engine Management: Enhanced MS2
Other Spoolin' Helpers/Hurters: none
Trans & Rear End Ratio: RX-7 FD 5-speed, 4.1 open
Rear tire size: 235/40R17

THIRD GEAR PULL:

RPM Boost(KPa)

3132 111
3392 127
3668 147
3841 163
3996 183
4162 213

At this point the wastegate begins to open and the boost increase rate drops (I need to fix this through the PWM table, currently open loop)

4338 223
4571 230
4799 244
4500 254
4809 267
4954 280
5249 300 (ALLOFIT)

Tonights update after I corrected the PWM table, 4th gear pulls:

RPM Boost(KPa):

3204 103.3
3307 121.3
3405 145.8
3508 167.3
3609 193.9
3699 214.7
3799 243.7
3894 265.6
3998 298.2 <----- ALLOFIT

lets see what happens when you start at 2k instead\as well

I fixed a loose wastegate and ohmygod I can hit 15 psi at 3000 RPM. (GT2560, VVT head) Official data later.

Engine: '90 1.6L w/ 190K miles
Turbo: Mitsubishi TD04-16G (Greddy Kit)
Manifold: Greddy Cast
Downpipe Size/Style: Greddy
Exhaust Size: 60mm (2.4")
Exhaust Components: Cobalt Performance Exhaust (Moss Motors) + Metallic High Flow Cat
Intercooler Core Size: No Intercooler
Intake Manifold: stock
Headwork: none
Engine Management: MSPNP9093
Other Spoolin' Helpers/Hurters: Closed Loop EBC, Porting of the Greddy Downpipe Inlet

FOURTH GEAR PULL:
RPM Boost (psi)
2000 1.01
2100 1.31
2200 1.60
2300 1.74
2400 2.18
2500 2.47
2600 2.61
2700 3.19
2800 4.06
2900 4.79
3000 5.95
3100 6.24
3200 6.82
3300 6.96
3400 7.98
3500 8.27
3600 8.56
3700 9.28
EBC Limited After 3700

Engine: '01 8.6:1 Supertech pistons
Turbo: GT2560, internal gate
Manifold: ETD shorty tubey, internal gate
Downpipe Size/Style: BEGI custom divorced 2.25" or 2.5" ?
Exhaust Size: 3"
Exhaust Components: FM hybrid cat (2.5" entrance, 3" rear), magnaflow rez, magnaflow 5x11x22"
Intercooler Core Size: TDR over the rad
Intake Manifold: '99 VICS stock
Headwork: mild Rebello, +1mm exhaust
Engine Management: AEM boost control and VVT, VVT not fine tuned for spool yet
Other spool helpers: cool weather, IAT = 17*C, slight boost leak from compressor O-ring

2320: 5 psi
2730: 10 psi
3100: 15 psi

Added my new data. 3rd earliest spool. PhilMD's data (2nd fastest) isn't at 4th gear on the street, it's on a dyno, which may produce a spoolier result.

VVT head got me like 250 RPM of spool.

https://www.miataturbo.net/attachmen...1&d=1325837490

Resurrected :)

Engine: '04 1.8L VVT
Turbo: 2854 Chinacharger
Manifold: BEGi Cast "Directed Pulse"
Downpipe Size/Style: ARTech 3"
Exhaust Size: ARTech 3"
Exhaust Components: Magnaflow Muffler and High flow cat
Intercooler Core Size: 24"x12"x2.5"
Intake Manifold: Stock
Headwork: N/A
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: N/A
Trans & Rear End Ratio: 5-speed, 4.3 LSD
Rear tire size: 195/50-15

FOURTH GEAR PULL:

RPM Boost(psi)
2250 2.5
2300 2.7
2400 3.2
2500 3.6
2600 4.2
2700 4.7
2800 5.2
2900 5.6
3000 6
3100 6.5
3200 6.7
3300 6.9
3400 7

Engine: '94 1.8L totally stock
Turbo: GT2860RS with Tial .64 A/R turbine housing
Manifold: Custom equal length bottom mount tubular with a proper merge collector
Downpipe: Custom 3"
Exhaust Size: Custom 3"
Exhaust Components: Magnaflow Muffler, Metallic high flow cat
Intercooler Core Size: BEGi #2
Intake Manifold: Stock
Headwork: None
Engine Management: Link
Other Spoolin' Helpers/Hurters: 65F ambient temp, GReddy profec B boost controller
Trans & Rear End Ratio: 5-speed, 4.3 LSD
Rear tire size: 205/45/16

FOURTH GEAR PULL:

RPM Boost(psi)

1840 0.0
2014 2.0
2334 4.0
2607 6.0
2808 8.0
2950 10.0
3050 12.0
3145 14.0

I should also note that I have uncontrollable boost creep (past 20 psi) with this setup above 5500 rpm, even with a Tial 38mm wastegate mounted right to the collector :(

Dump tube?

WG probably at right angles too...

ohhhh i need to find a boost log of my t3 50 trim chinacharger compared to my t3 60 trim.

1-1/2" tube, probably about 24" long before it merges back into the 3" downpipe.

What wastegate doesn't require the exhaust to abruptly change directions? The wastegate itself is a 90 degree angle.

Id try not doing that.

Build motor and enjoy creep

VTA isn't really my thing.

I have a .86 Tial housing on order, I will try that first. It should be a pretty easy swap, given all the v-band connections!! I hate to lose my 14 psi at 3150 rpm spool, but if it works it will be a helluva lot easier than going to a 44mm wastegate, or twin wastegates, or anything else that requires extensive welding and fabrication.

Engine: '99 1.8L 9.5:1 supertechs +1mm
Turbo: GT2560R
Manifold: ARTech™ Ramhorn Top Mount manifold
Downpipe Size/Style: 3.5" homemade
Exhaust Size: 3.5" homemade. no cat
Exhaust Components: Magnaflow 5x11x22 muffler
Intercooler Core Size: 550mm x 225mm x 64mm
Intake Manifold: stock
Headwork: none
Engine Management: Adaptronic E420c
Other Spoolin' Helpers/Hurters: EBC

FOURTH GEAR PULL:
RPM Boost (psi)
2576 3.33
2605 4.49
2701 6.67
2839 10.15
2926 11.89
3057 12.91
3176 15.09
https://www.miataturbo.net/attachmen...ine=1339788764

wow that is an efficient setup right there. torque under curve must be insane. Got a dyno plot?

There’s one in my build thread but my wastegate was leaking during that dyno run... nevertheless with 14.5psi boost it made 265lbs around 4K so I’m happy.

that car is just BEGGING for a 2871 and custom Intake mani:D

Engine: '95 1.8L
Turbo: GT2860RS
Manifold: ARTech FM replacement manifold
Downpipe Size/Style: 3"
Exhaust Size: 3"
Exhaust Components: resonator & Magnaflow Muffler
Intercooler Core Size: Old Style FM
Intake Manifold: Stock
Headwork: 99 head 3angle, backcut
Engine Management: MS3x
Other Spoolin' Helpers/Hurters: Toyota COPs, EBC, intake timing gear
Trans & Rear End Ratio: 6-speed, 3.636 LSD
Rear tire size: 205/50-15

FIFTH GEAR PULL:

RPM Boost(psi)
2893 .3
2904 1.0
3006 3.5
3106 5.0
3316 6.5
3510 8.3
3719 10.1
3943 14.9
4038 15.5
4211 18.2
4307 20.0

I wanted to post my values before tuning my EBC. I'm honestly not very happy with the results. I expected to be at 20psi before 4k. I guess the smaller wheel of the 2860rs is offset by the .84 exhaust housing vs the .64 of the china 2870.

AFTER EBC tune:

Can we add another field to this survey? Altitude. I've been trying to research altitude vs spool loss and I haven't had much results. Soon enough I should have datalogs for where I live (7200 ft elevation) vs Albuquerque (5200 ft) - but I'm more curious of the differences between sea level vs 7k+ feet.

***Edit: I found a couple days after posting this data that my wastegate was loose...really loose. Retuning for what will hopefully be greatly improved spool and will post new results when I get them.


Still working on the tune, but I don't think I'm going to get spool times down much more due to the crappy manifold and dp, no matter how much timing I throw at it. So here it is.

Engine: '92 1/6L
Turbo: EvoIII 16g (Genuine Mitsubishi)
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
Other Spoolin' Helpers/Hurters: Ummm...eBay manifold and dp
Trans & Rear End Ratio: Stock 5-speed/4.3
Rear tire size: 205/50-15

4th Gear Pull, flat footed it at about 2K rpms but I'm in vac until roughly 3400 so that's where the data starts here.

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
...

https://www.miataturbo.net/attachmen...1&d=1340308998