GT28R, 7psi, stock internals, 230hp
- coldfire07
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GT28R, 7psi, stock internals, 230hp
So, after two years of having a KA-T and not knowing power/AFR, I got my ass to the dyno today. Made 3 4th gear pulls. Here's the setup
GT28R (s15 turbo), boost controlled by internal gate at 7psi
SSAC bottom mount manifold
z32 MAF
550cc Injectors
Second hand Enthalpy ECU
Walbro fuel pump
ebay intercooler/piping
Megan racing turbo elbow
3" downpipe, cat, RS-R GT2 3" back
~190 compression on all cylinders last time I checked.. not sure why it's so high, but can't complain
Somebody had burned the wire that sends the wideband signal to the dyno, but it was still operational to look at. I was around 12.3 up until ~3.5k RPM and then it dropped off to 12.0 straight across.
I'm very happy with what it made, didn't think it was going to be this high or this smooth and consistent for what I'm running. With correction on, it was at 240whp.
Now it's time to install the manual boost controller I have lying around and raise it to 10-12psi. Turbo is good to 18psi, and the engine still has a lot of roomI'll post some pics of the car shortly.
GT28R (s15 turbo), boost controlled by internal gate at 7psi
SSAC bottom mount manifold
z32 MAF
550cc Injectors
Second hand Enthalpy ECU
Walbro fuel pump
ebay intercooler/piping
Megan racing turbo elbow
3" downpipe, cat, RS-R GT2 3" back
~190 compression on all cylinders last time I checked.. not sure why it's so high, but can't complain
Somebody had burned the wire that sends the wideband signal to the dyno, but it was still operational to look at. I was around 12.3 up until ~3.5k RPM and then it dropped off to 12.0 straight across.
I'm very happy with what it made, didn't think it was going to be this high or this smooth and consistent for what I'm running. With correction on, it was at 240whp.
Now it's time to install the manual boost controller I have lying around and raise it to 10-12psi. Turbo is good to 18psi, and the engine still has a lot of roomI'll post some pics of the car shortly.
- turbo240ka24det
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- coldfire07
- Dreams of owning a 240!
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- Joined: Fri Jun 24, 2005 11:00 pm
- Location: Dallas / Austin
- coldfire07
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nice work ... ur pretty risky running those A/F on a stock motor .. id richen it up a little .. might lose a little power but will keep your motor longer ... non the less nice job ...
Anthony
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Wow, nice torque curve. (even though there's not much of a "curve" to it!)
I've heard various compression testers can have different results. I tested mine recently with a Harbor Freight compression tester, and it was 205-210 across all 4 cylinders. As long as they are the same across all 4 cylinders, I'm not worried about it.coldfire07 wrote:~190 compression on all cylinders last time I checked.. not sure why it's so high, but can't complain
Wiseco/Eagle, JWT S1 cams, BC valve springs, PT5857, ID1700 injectors, SR20DET ECU w/ Nismotronic, COP conversion with LS ignition coils, etc, etc...
--> YouTube channel --> my build thread
--> YouTube channel --> my build thread
compression numbers are influenced a lot by how powerful ur battery is :/ The difference between an interstate batt and a small hawker was 15 psi.. 175 vs 190. On a stock DE of course (mine). plus a little carbon build up helps too
EDIT: why are you letting off the throttle so soon? ur HP is looking like it will peak around 6k... prolly should shift at or a little after 6500.
EDIT: why are you letting off the throttle so soon? ur HP is looking like it will peak around 6k... prolly should shift at or a little after 6500.
Current Experiment: Project Twin-Charge 2022
Re: GT28R, 7psi, stock internals, 230hp
I just noticed this part. So, for two years you've been running without a wideband in the car?coldfire07 wrote:So, after two years of having a KA-T and not knowing power/AFR,
Wiseco/Eagle, JWT S1 cams, BC valve springs, PT5857, ID1700 injectors, SR20DET ECU w/ Nismotronic, COP conversion with LS ignition coils, etc, etc...
--> YouTube channel --> my build thread
--> YouTube channel --> my build thread
Re: GT28R, 7psi, stock internals, 230hp
See, it can be done!adamky wrote:I just noticed this part. So, for two years you've been running without a wideband in the car?coldfire07 wrote:So, after two years of having a KA-T and not knowing power/AFR,
On FA as slow240.
95 Base 5MT; Injen intake, Motoria Single tip exhaust w/ 2nd Cat delete. S14 VLSD. Clutch Masters Alum. Flywheel, KYB GR-2s Specialty Z subframe collars. Nismo Mounts.
KA-T project: COMPLETE! Parts getting fabbed up to work together 06/07/08. Install pending arrival of Fuel Pump and BOV. Should have boost by July!
5/2011 - Lol, totally didn't! I do have two kids though.
SEX = DEAD DREAMS
95 Base 5MT; Injen intake, Motoria Single tip exhaust w/ 2nd Cat delete. S14 VLSD. Clutch Masters Alum. Flywheel, KYB GR-2s Specialty Z subframe collars. Nismo Mounts.
KA-T project: COMPLETE! Parts getting fabbed up to work together 06/07/08. Install pending arrival of Fuel Pump and BOV. Should have boost by July!
5/2011 - Lol, totally didn't! I do have two kids though.
SEX = DEAD DREAMS
- PandaPants
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Different dynos can have different results. It's just a number, don't put too much stock in it. A T28 should easily pick up 10-20 hp over a T25.turbonola wrote:i have a friend who made those numbers on a t25. i honestly thought they'd be a lil higher with a t28 maybe like a 5-10hp difference. oh well guess i'll just hafta go with a gt28rs to one up him.
Wiseco/Eagle, JWT S1 cams, BC valve springs, PT5857, ID1700 injectors, SR20DET ECU w/ Nismotronic, COP conversion with LS ignition coils, etc, etc...
--> YouTube channel --> my build thread
--> YouTube channel --> my build thread
- turbo240ka24det
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Exactly! Put those two cars on the same dragstrip and compare trap speeds, we'll see the true weight-to-power ratio there.adamky wrote:Different dynos can have different results. It's just a number, don't put too much stock in it. A T28 should easily pick up 10-20 hp over a T25.turbonola wrote:i have a friend who made those numbers on a t25. i honestly thought they'd be a lil higher with a t28 maybe like a 5-10hp difference. oh well guess i'll just hafta go with a gt28rs to one up him.
1991 240SX, hatchback
-16.2 @ 84mph baseline run before turbo
-16.2 @ 84mph baseline run before turbo
- coldfire07
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Re: GT28R, 7psi, stock internals, 230hp
Yeah, haha. Always ran pig rich when the car got the slightest bit warm. ***** blew.adamky wrote:I just noticed this part. So, for two years you've been running without a wideband in the car?coldfire07 wrote:So, after two years of having a KA-T and not knowing power/AFR,
This last weekend, I sprayed some MAF cleaner... and now the car runs great. ***** so stupid that it took me that long to think to clean the MAF. My battery is nothing special, and it's mounted in the trunk. Some random battery that came with the car four years ago. Did another compression test this week, still 180-190 straight across somehow (new compression tester too).
I have a manual boost controller sitting around... now that I've fixed the problem I've always had with the car running rich, I'm going to install it and go from ~6psi to around 10 or so. Should be 260whp hopefully.
- turbo240ka24det
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Re: GT28R, 7psi, stock internals, 230hp
I did also...adamky wrote:I just noticed this part. So, for two years you've been running without a wideband in the car?coldfire07 wrote:So, after two years of having a KA-T and not knowing power/AFR,
But i had an egt probe in the collector which didnt help too much but it was something..
- coldfire07
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Wow, replacing an o2 sensor made all the difference in the world. I no longer have to disconnect my battery every time I get out of the car to clear the ECU adaptation. Finally gave me the confidence to install the manual boost controller I've had lying around for over a year.
Going to take it one step at a time since I don't want to blow this engine, went from .4bar to around .55bar now. Will raise it slightly every couple of days making sure it's holding the calibration. Might also be a good time for one of those overboost protection thingies.
Planning on going for .7 bar which is 10.2 PSI. Pretty sure that a stock engine can handle that which should put me in the 250+ HP range, hopefully.
Going to take it one step at a time since I don't want to blow this engine, went from .4bar to around .55bar now. Will raise it slightly every couple of days making sure it's holding the calibration. Might also be a good time for one of those overboost protection thingies.
Planning on going for .7 bar which is 10.2 PSI. Pretty sure that a stock engine can handle that which should put me in the 250+ HP range, hopefully.
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Re: GT28R, 7psi, stock internals, 230hp
Sorry to Resurrect an old post but what clutch are you using?