Mpliki

Engine: 1.8 bp 99 Forged pistons, rods, arp all around.
Turbo: EFR6758 0.64a/r
Manifold: Trackspeed EFR T25
Downpipe Size/Style: Trackspeed EFR 3"
Exhaust Size: 3"
Exhaust Components: 3" catback, no cat
Intercooler Core Size: NRG medium size
Intake Manifold: VICS
Headwork: OEM
Engine Management: MS2pnp (waiting for ms3pro)
Other Spoolin' Helpers/Hurters: 6speed, 3.636 , audi r8 coils

FIFTH GEAR PULL: (equivalent of a 4th gear pull in a 5-speed car)

RPM Boost(psi)
2329rpm 0.4psi
2414rpm 1.6psi
2495rpm 3.19psi
2618rpm 4.35psi
2713rpm 4.93psi
2835rpm 5.8psi
3005rpm 7.25psi
3147rpm 8.7psi
3280rpm 10.8psi
3380rpm 12.3psi
3491rpm 14.8psi
3601rpm 17.5psi
3748rpm 18.9psi
3856rpm 20.3psi


Past 5000 the pressure drops. I currently have an APEXi AVCR. Waiting for MS3 and a 4 port Boost solenoid. Will update when i will tune it properly. A completely diffrent car.( Previous turbo was a GTX 2867 gen1 0.64A/R)

muoto

Now with VVT head + Skunk2 intake:
2753 3.3
2840 6
2908 8
3011 10.5
3104 12.9
3165 14.7 psi boost

Not bad for a old gt2871r 56trim

Godless Commie

iTrader: (2)

Now that I have turbos, I will log and post my spool data.

This might give yo guys an idea about my "spool".
I was on a steep uphill, lugged the engine down to 1000 rpm in second gear on purpose, and as soon as I mashed the pedal (at 1000 rpm), I had 3-4 psi.
My boost starts at idle.

Ted75zcar

iTrader: (2)

oooh oooh, let's compare

4:10 + 6speed in 4th on flat ground, 1 bar boost point: 2652 RPM
(I am at 5280ft which means ambient is around 85kpa)

Godless Commie

iTrader: (2)

Give me a few weeks.
I can't hit 1 bar yet.
New engine, new setup, just started tuning, so I am taking baby steps with boost.
Max I can see at this point is about 7 - 8 psi.

Ted75zcar

iTrader: (2)

Might as well make this somewhat official

Chassis: 1991
Engine: '95 block, 83.5 Wiseco 8.5:1, VVT
Turbo: GTX2867R GEN II 0.64a/r
Supercharger: MP62 Gen 4
Manifold: Begi Cast
Downpipe Size/Style: Begi Divorced
Exhaust Size: 3"
Exhaust Components: 3" Enthuza metal cat + catback
Intercooler Core Size TC: Ebay bar/plate 28"x6"x2.5" ?
Intercooler Core Size SC: Unknown core size, Bell Ubercharger FMIC
Intake Manifold: B18 Honda
Headwork: +1mm OS I/Ex, Supertech heavy doubles, mild port/polish, bowl blend, de-shroud
Engine Management: DIYautotune MS3Pro module, Westfield MX5 adapter for NB1, several custom widgets
Other Spoolin' Helpers/Hurters: 5280ft elevation (15% off the top), e85, GM D510c, 4:10:1, compound turbo-super

FIFTH GEAR PULL: (equivalent of a 4th gear pull in a 5-speed car)

RPM Mani-P TC-Boost-P Mani-Boost-P
(rpm) (kpa) (psi) (psi)
1435 83.4 -1.2 0.2
1615 126.8 1.0 6.5
1760 140.6 2.2 8.5
2006 163.5 3.8 11.8
2310 185.8 5.3 15.1
2707 208 10.1 18.3
2931 213.7 14.2 19.2
3112 202.7 14.5 17.5

DNMakinson

iTrader: (3)

Did you forget to add the SC to the Other Spoolin' Helpers/Hurters section?

Ted75zcar

iTrader: (2)

I listed it above, but I went ahead and updated for clarity. Thanks for the suggestion.

cwatson

Does anyone with a EFR or BB Garret capable of over 300 whp have rise time data like this? I'm interested mostly 2-3000 RPM range. Even "only" ~700ms from 0-20psi at 3k is noticeably laggy and feels like a slingshot.

I've found boost vs RPM data of limited use to assess low-rpm street ability and the time to spool dominates the response. None of this is a concern on the track or on an even moderate RPM WOT pull. Any flat foot shifting makes it moot as well.

At low RPM, I can get 5-10psi instantly but getting from there to 20-25 psi takes most of the time, even with the wastegate pressurized shut using a 4P EBC. I'm wondering if a lower-inertia, modern turbo would be noticeably different (<400ms from 0-20psi starting from 2-3000 RPM) than my old TD04HL-20T AR0.41.


Thanks!

sixshooter

iTrader: (12)

Do you have any idea what sort of internal stresses are created with 20 pounds of boost at 2000 RPM? The extreme side loading of the piston skirt and the connecting rod bearings at a time when there is extraordinarily little oil being slung on to the cylinder walls and pumped to the bearings?

I understand your goals are probably different than mine, but you should know the consequences.

1993z32

Hey y'all, 1.6L(egend) back again, since I got roasted when I thought 1.6's were pretty cool I had to go back and build a 'real' setup, and I could not be any happier with how this car performs. The spool is insane.

Engine: 2001 1884cc, 9.0:1 CR, w/ functional VVT (Although I can't get it to do anything below 2800)
Turbo: EFR6258, IWG, 0.64 A/R, T25 inlet
Manifold: Artech short runner bottom mount
Downpipe: Artech 3"
Exhaust Size: 3"
Exhaust Components: Catless straight pipe
Intercooler Core Size: 18.00" x 6.50" x 3.25", full 2.50" piping
Intake Manifold: Skunk2 w/ Skunk2 TB
Headwork: Mild Porting, blended bowl, no chamber work. Back-cut, stock sized valves, VS855 springs
Engine Management: MSPro
Other Spoolin' Helpers/Hurters: EBC, E85
Trans & Rear End Ratio: 5-Speed Getrag 260, 3.909
Rear tire size: 245/40R15

FOURTH GEAR PULL (1:1):

RPM Boost(psi)
2000 2.7
2100 3.6
2200 4.0
2300 4.3
2400 4.6
2500 5.1
2600 6.1
2700 7.3
2800 8.5
2900 10.2
3000 12.2
3100 13.7
3200 15.7
3300 17.8
3400 19.8
3500 21.7
Target 21psi to redline

yossi126

iTrader: (6)

I have no explanation for the 400 rpm difference in earlier spool. Could be due to starting the test earlier. But definitely slightly better spool from the ball bearing as you can see. Turbo holds boost till redline. The journal s13 would fall off after 6K all the way to 10.8 psi (My target is 13).
Dyno next week.

tekno

Engine: 1.8 VVT, factory pistons & rings, maxpeeding rods
Turbo: chinese journal bearing GT2871, specs as follows:
Compressor details
a/r 0.60 compressor housing
air inlet 3" air outlet 2"
inducer 54.13mm exducer 70.00mm
Turbine details
a/r 0.64
turbine housing flange:T25 flange
inducer 53.00mm exducer 46.20mm

Manifold: chinese cast tacotaco
Downpipe Size/Style: diy 2.5" for about 35cm then it steps up to 3"
Exhaust Size: 3" Kraken
Exhaust Components: Kraken 3" SS with magnaflow rear muffler
Intercooler Core Size: 320x280x76mm, over the rad pipe setup
Intake Manifold: Stock
Headwork: Stock
Engine Management: Ecumaster EMU Classic
Other Spoolin' Helpers/Hurters: Mac Valve/me diy mapping it
Trans & Rear End Ratio: 5 speed, 4.1 diff
Rear tire size: 195/50 R15
3rd gear pull

to be fair, i'm not very pleased with the spool times of my setup, so i'll be swapping the exhaust manifold for a second hand but unused Kraken unit that I bought for a very reasonable price. I'd like to change the turbocharger aswell, so if you guys know of t25 flanged, chinese/cheap unit that spools faster let me know. Also seen some ebay churbos with same turbine wheel size but in a .49 A/R housing, so if I can find a smaller housing I'll definitely try it.

Ok, enough chit chat, here's the chinacharger spool data:

Time RPM TPS Boost AFR
159.91 1947 100 0.73 15
159.96 1939 100 0.73 15
160.01 1935 100 0.73 15
160.06 1948 100 0.73 15
160.11 1973 100 0.73 15
160.16 1990 100 0.73 15
160.21 1997 100 0.73 15
160.26 2003 100 0.87 14.8
160.31 2014 100 0.73 14.9
160.36 2022 100 0.87 14.7
160.41 2049 100 0.87 14.7
160.46 2056 100 0.73 14.7
160.51 2051 100 0.87 14.7
160.56 2088 100 0.87 14.7
160.61 2098 100 0.87 14.6
160.66 2104 100 1.02 14.6
160.71 2122 100 0.87 14.5
160.76 2138 100 1.16 14.6
160.81 2143 100 1.02 14.5
160.86 2148 100 1.02 14.7
160.91 2174 100 1.16 14.7
160.96 2199 100 1.16 14.7
161.01 2217 100 1.31 14.8
161.06 2216 100 1.16 14.7
161.11 2220 100 1.31 14.7
161.16 2260 100 1.45 14.4
161.21 2278 100 1.45 14
161.26 2281 100 1.31 13.9
161.31 2282 100 1.45 13.8
161.36 2298 100 1.6 13.9
161.41 2325 100 1.6 13.9
161.46 2352 100 1.6 13.9
161.51 2358 100 1.74 13.9
161.56 2360 100 1.74 13.8
161.61 2393 100 1.74 13.7
161.66 2412 100 1.74 13.7
161.71 2438 100 1.74 13.7
161.76 2449 100 2.03 13.6
161.81 2448 100 2.18 13.4
161.86 2471 100 2.03 13.4
161.91 2507 100 2.18 13.4
161.96 2527 100 2.32 13.4
162.01 2527 100 2.47 13.3
162.06 2549 100 2.32 13.2
162.11 2577 100 2.47 13.2
162.16 2599 100 2.61 13.2
162.21 2622 100 2.61 13.1
162.26 2636 100 2.47 13.1
162.31 2651 100 2.76 13
162.36 2660 100 2.9 12.9
162.41 2690 100 3.05 12.9
162.46 2719 100 3.05 12.9
162.51 2735 100 3.05 12.6
162.56 2744 100 3.19 12.5
162.61 2765 100 3.19 12.4
162.66 2798 100 3.34 12.4
162.71 2810 100 3.48 12.4
162.76 2828 100 3.34 12.4
162.81 2858 100 3.48 12.4
162.86 2867 100 3.63 12.4
162.91 2880 100 3.48 12.4
162.96 2904 100 3.77 12.4
163.01 2934 100 3.77 12.2
163.06 2954 100 3.77 12.2
163.11 2961 100 3.77 12.2
163.16 2984 100 4.06 12.2
163.21 3011 100 3.92 12.2
163.26 3024 100 4.06 12.3
163.31 3040 100 4.06 12.3
163.36 3081 100 4.35 12.3
163.41 3095 100 4.35 12.3
163.46 3100 100 4.64 12.4
163.51 3140 100 4.64 12.4
163.56 3168 100 4.93 12.4
163.61 3183 100 4.93 12.3
163.66 3209 100 5.08 12.3
163.71 3223 100 5.22 12.3
163.76 3242 100 5.08 12.2
163.81 3288 100 5.37 12.2
163.86 3302 100 5.37 12.2
163.91 3312 100 5.66 12.2
163.96 3337 100 5.66 12.2
164.01 3375 100 5.8 12.2
164.06 3413 100 5.95 12.2
164.11 3404 100 6.24 12.2
164.16 3430 100 6.24 12.1
164.21 3487 100 6.53 12.1
164.26 3494 100 6.53 12.1
164.31 3513 100 7.11 12.1
164.36 3567 100 7.11 11.9
164.41 3579 100 7.4 11.9
164.46 3592 100 7.69 11.9
164.51 3630 100 7.69 11.8
164.56 3674 100 7.98 11.8
164.61 3687 100 8.41 11.8
164.66 3728 100 8.85 11.8
164.71 3760 100 9.14 11.8
164.76 3814 100 9.43 11.8
164.81 3859 100 9.86 11.8
164.86 3803 100 10.15 11.8
164.91 3853 100 10.73 11.8
164.96 3940 100 11.46 11.8
165.01 3980 100 11.46 11.8
165.06 4020 100 11.46 11.8
165.11 4043 100 13.2 11.7
165.16 4041 100 13.63 11.7
165.21 4079 100 14.07 11.7
165.26 4153 100 14.65 11.6
165.31 4175 100 15.23 11.6
165.36 4246 100 15.66 11.6
165.41 4242 100 15.95 11.6
165.46 4314 100 16.24 11.6
165.51 4358 100 16.24 11.6
165.56 4401 100 16.24 11.6
165.61 4397 100 16.24 11.6
165.66 4420 100 16.24 11.6
165.71 4495 100 15.95 11.6
165.76 4578 100 15.52 11.7
165.81 4578 100 15.23 11.7
165.86 4580 100 15.23 11.7
165.91 4645 100 15.23 11.7
165.96 4722 100 14.94 11.7
166.01 4734 100 14.94 11.7
166.06 4745 100 14.79 11.7
166.11 4777 100 14.94 11.7
166.16 4827 100 14.94 11.7
166.21 4892 100 15.23 11.7
166.26 4923 100 15.08 11.7
166.31 4912 100 15.66 11.6
166.36 4971 100 15.66 11.6
166.41 5021 100 16.1 11.7
166.46 5094 100 15.52 11.7
166.51 5078 100 15.52 11.7
166.56 5076 100 15.95 11.7
166.61 5150 100 16.39 11.7
166.66 5202 100 16.39 11.7
166.71 5242 100 16.68 11.7
166.76 5265 100 16.39 11.7
166.81 5271 100 15.81 11.6
166.86 5273 100 15.52 11.6
166.91 5324 100 15.52 11.6
166.96 5402 100 15.52 11.6
167.01 5431 100 14.79 11.6
167.06 5443 100 14.94 11.5
167.11 5469 100 15.23 11.5
167.16 5477 100 15.52 11.6
167.21 5495 100 15.66 11.6
167.26 5579 100 15.81 11.6
167.31 5622 100 15.37 11.6
167.36 5644 100 15.23 11.6
167.41 5667 100 15.08 11.6
167.46 5673 100 15.52 11.6
167.51 5696 100 15.81 11.6
167.56 5719 100 15.95 11.6
167.61 5719 100 15.95 11.6
167.66 5719 100 15.95 11.6
167.71 5875 100 15.95 11.6
167.76 5885 100 15.81 11.5
167.81 5919 100 15.66 11.6
167.86 5897 100 15.23 11.6
167.91 5926 100 15.23 11.6
167.96 5961 100 15.08 11.6
168.01 5995 100 14.94 11.5
168.06 6042 100 14.79 11.5
168.11 6077 100 14.79 11.5
168.16 6088 100 14.65 11.5
168.21 6070 100 14.65 11.5
168.26 6122 100 14.79 11.5
168.31 6169 100 14.79 11.5
168.36 6190 100 14.79 11.5
168.41 6230 100 14.79 11.5
168.46 6250 100 14.65 11.5
168.51 6246 100 14.79 11.5
168.56 6289 100 14.65 11.4
168.61 6321 100 14.65 11.4
168.66 6327 100 14.65 11.4
168.71 6351 100 14.65 11.4
168.76 6374 100 14.5 11.4
168.81 6417 100 14.5 11.4
168.86 6422 100 14.5 11.4
168.91 6473 100 14.36 11.4
168.96 6504 100 14.36 11.4
169.01 6501 100 14.21 11.4
169.06 6531 100 14.07 11.4
169.11 6568 100 13.78 11.4
169.16 6581 100 13.92 11.4
169.21 6613 100 14.07 11.4
169.26 6645 100 14.07 11.4
169.31 6654 100 14.21 11.4
169.36 6662 100 14.21 11.4
169.41 6724 100 14.5 11.3
169.46 6715 100 14.65 11.3
169.51 6732 100 14.94 11.3
169.56 6765 100 14.65 11.1
169.61 6776 100 14.36 11.1
169.66 6801 100 14.07 11.1
169.71 6838 100 14.36 11.1
169.76 6839 100 14.36 11.1
169.81 6866 100 14.5 11.1
169.86 6893 100 14.65 11.1
169.91 6920 100 14.79 11
169.96 6942 100 14.5 11
170.01 6962 100 14.21 10.9
170.06 6950 100 14.65 10.9
170.11 6983 100 14.65 10.9
170.16 7035 100 14.79 10.9
170.21 7055 100 14.5 10.9
170.26 7075 100 14.21 10.9
170.31 7074 100 14.21 10.9
170.36 7072 100 14.21 10.9
170.41 7105 100 14.07 10.8
170.46 7136 100 14.21 10.8

Xide12

I'll add mine, it spools a lot slower than I was expecting. Probably should have started at a lower rpm.

Engine: Stock 1994 1.8L
Turbo: GT2554r
Manifold: Kraken cast manifold
Downpipe: Kraken 2.5"
Exhaust Size: 2.5"
Exhaust Components: Catless, magnaflow straight thru muffler
Head: Stock 94 head
Intake:Stock 1.6 TB with 1.8 manifold
Boost control: Open loop EBC, clamped shut until 3000 rpms
Other Spoolin' Helpers/Hurters: 5,000ft elevation (83kpa ambient), basemap ignition timing
Trans & Diff: 5-Speed with 4.1 Type 1 Torsen
Rear tire size: 195/50R15

FOURTH GEAR PULL:

RPM - MAP - PSI
2234 90.6 1.10
2290 95.6 1.83
2343 100.6 2.55
2421 105.9 3.32
2494 111.4 4.12
2570 116.6 4.87
2643 122.2 5.69
2726 128.0 6.53
2811 134.5 7.47
2901 141.4 8.47
2986 148.8 9.54
3096 156.1 10.60
3189 162.2 11.49
3311 168.7 12.43
3425 176.6 13.58
3547 183.6 14.59

Ted75zcar

iTrader: (2)

altitude is a bitch, this point would be at ~3000RPM at sea level. EBC would help a little.

EFR 6758s don't spool till around 4700-4800 at this altitude, 6258 is ~4250

edits: mobile fixes

Xide12

Wow, a 500 rpm spool delay sucks. Didnt know it was that bad from elevation gain

Still a lot of fun to drive it though

crash12190

Engine: '96 8.5:1 Weisco, Manley rods Pump 93
Turbo: GTX2876R Gen 2
Manifold: Flyin Miata
Downpipe Size/Style: Flyin Miata Full 3"
Exhaust Size: 3"
Intercooler Core Size: Cx racing WRX STI front mount
Intercooler piping:Flyin Miata
Intake Manifold: stock 96
Headwork: stock 96 head
Engine Management: Megasquirt
Other Spoolin' Helpers/Hurters: Fab 9 COPs
Trans & Rear End Ratio: 6-speed, 4.1 Torsen
Rear tire size: 205/45-15

FIFTH GEAR PULL:
SAME AS 4TH IN A 5 SPEED

RPM PSI
2000 1.2
2197 2.3
2307 2.7
2404 3.5
2506 4.2
2603 4.9
2713 5.6
2818 6.6
2920 7.6
3037 8.9
3123 10.4
3274 12.5
3365 14.4
3479 16.8
3595 19.1
3667 21.1
3765 22.7


Usually will run 29psi, car is turned down for the small all seasons I have on it

der_vierte

Thats some nice spool for one of the bigger turbos.

Is there a GTX2876 Gen2 or is it a typo and you're running a GTX2867 Gen2?

How much power?

crash12190

Not a typo, GTX2876R gen2
car dynod at 350 wheel spinning on the dyno. I'm estimating 360 at least.

Graxis

Engine: Stock 1996 1.8L; ARP head studs and new head gasket
Turbo: GT2560R
Manifold: Kraken low-mount cast manifold
Downpipe: Kraken 3"
Exhaust Size: Kraken 3"
Exhaust Components: Catless w/Magnaflow muffler
Head: Stock 96 head; mild intake and exhaust port and polish
Intake: Ebay intercooler; NB throttle body; stock 96 manifold
Boost control: EBC equipped but off (no open or CL boost control) for testing new actuator
Other Spoolin' Helpers/Hurters: FF LS coils; Braineack timing map; Turbosmart IWG75 w/10psi spring and improperly set preload; 25*F IAT
Trans & Diff: 5-Speed with 4.1 Type 1 Torsen
Rear tire size: 225/50R15

FOURTH GEAR PULL:

RPM - MAP - PSI
1990 - 99.9 - 0
2110 - 110 - 1.5
2292 - 121.6 - 3.2
2485 - 130.6 - 4.5
2708 - 140 - 5.9
2933 - 150.2 - 7.3
3058 - 154.8 - 8.0
4380 - 159.7 - 8.7 (ended pull here)

8psi isn't going to blow anyone's mind, but without EBC and improper actuator preload, I expect good results when I get it dialed in. I can't wait to get my other motor finished. Boost is addictive.