Dyno of Phatka-t kit (GT32) with Enthalpy ECU tune

[s14det]

11psi 271hp 273tq13psi 283hp 283tq

Has you can see it is very rich in the highend and lean at idle and not in boost. Still safe tho, but there is alot more power to be made.

Vids will come shortly hopefully

This is with the Phatka-t full turbo setup minus AEM. I do have 50lber's fyi
Modified by s14det at 2:13 AM 9/18/2005

[1WheelWonder]

Good numbers man, what's your fuel set-up and such

[AmoebAssassin]

Any internal work or is this stock block w/ headgasket?

[Florida240sx]

nice numbers what did the kit coinsist of?

[s14det]

This is a stock internal engine with 91 cams (240/248) w/ about 60K on it (Compression on all 4 cyclinders is 180), fidanza flywheel, ASP pulley, No Cat, all turbo/fuel stuff from phatka-t.com minus their AEM standalone, Boostdesigns intercooler kit.

[WDRacing]

Man, you've got quite a bit of power waiting to be had if you lean her out.

[Nismo_Freak]

That seems kinda weak at 13 PSI to only be making 283whp, even at 10:1

[sunnys14]

should you be pushing 300whp at 13psi?

[WDRacing]

With a 10/1 AFR he's bogging and pumping out cold EGT's so the turbo is less efficient and the combustion cycle is lacking power. Run 110 octane and tune it for 12.7-13/1 and you'll see a gain of 100 WHP.

WD

[MaxType 240]

My SAFCII is tweaked a bunch despite the Enthalpy tune. It's a nice to have for open BOV & knock sensor readings.

[sunnys14]

i wanna get an enthalpy tune but i hear hes still not done with the conversion harnesses for the s14 yet...

[s14det]

So you still used a SAFCII to fine tune it? I was thinking about buying one, but since he has the dyno graph now, I would think he should be able to get it pretty spot on.

[hannibal]

I thought the Enthalpy ECU ran leaner than JWT's. That 10:1 A/F is JWT territory...

[Nismo_Freak]

With a 10/1 AFR he's bogging and pumping out cold EGT's so the turbo is less efficient and the combustion cycle is lacking power. Run 110 octane and tune it for 12.7-13/1 and you'll see a gain of 100 WHP.

WD

Turbocharger inefficiency would mean lower boost pressure.

If he is pushing that much air then there is something missing other than just the rich A/F. I'd imagine the timing is out as well.

Also note that the blue run made more power, with the richer A/F.

Timing is definately being monkeyed somewhere.

[Red-KAT]

You need to lean out the top and retard the timing. Make mo powa!

[klattr1]

You need to lean out the top and retard the timing. Make mo powa!

it does need to be leaned out some for sure. as far as retarding the timing, no need for that since his ecu is tuned accordingly. he would lose power and efficiency if he did that.

S14DET, where did you get your 50lb injectors from? did you tell Scott (Enthalpy) they were 525cc? whats your base fuel pressure at idle (fpr vacuum hose connected/disconnected? and what psi?) what procedure did you use for setting your base timing? what mafs do u have? whats your vacuum like at idle (700-800 rpms)? and finally, exactly what specs is your turbo?

[s14det]

50lber's are from phatka-t, I have a Z32 maf, fuel base pressue is at 50psi where scott said I should have it. (vacum disconneted from FPR) Vacum at idle (1k rpm) is 19-20. On the timing, scott tuned it for 93 octane and we only have 91 octane here. So he said to bump the base timing down about 2 degree. Engine will not idle lower the 1k, which may be because at idle on the dyno the A/F was pegged at 18, then once moving would go to 15 or so then once boost comes on it goes to 11.5 and drops from there. I have no clue what the specs are on the PKGT32, I do not think Ivan ever said what they where. I have send the dyno graphs to scott to let him look at it and hopefully will be able to fix the issue.

So you guys think something is wrong with the timing? I was thinking that I should be making more power also, but I love the TQ curve (line)

[klattr1]

timing would definitely cause lower numbers. but if all you have is 91 octane, then maybe thats the safest thing to do. if you bumped the base timing back to stock (w/ 93 octane or more obviously), and air fuel ratios were 11.5:1-12:1 range, you should net around 300 rwhp at 13 psi for sure.

50 psi fuel pressure seems odd to me though. stock base fuel pressure is 43.5 psi (with fpr vacuum hose disconnected) or 34 psi (with fpr hose connected). ive never seen him tell any customers to run 50 psi base fuel pressure. that would force people to buy an adjustable fpr with running Scott's ecu. hmmm. look into that.

BTW, the torque curve is really nice. Based on the curve, I would have to say the GT32 is a really good, all-around turbo which provides excellent response and spool. Good for those that like that mid-range power. Flip240 and Ivan seem to like the GT32 as well.

[Red-KAT]

it does need to be leaned out some for sure. as far as retarding the timing, no need for that since his ecu is tuned accordingly. he would lose power and efficiency if he did that.

He would gain power due to the fact that when you run rich it basically retards you're timing, because it takes longer to ignite the fuel. That's why when he ran rich he made more power. It pushed back the ignition point and had better leverage on the crank.

Adding fuel does not help reduce the chance of knock... It because it takes longer to ignite the fuel its like you just retarded you're timing.

[klattr1]

He would gain power due to the fact that when you run rich it basically retards you're timing, because it takes longer to ignite the fuel. That's why when he ran rich he made more power. It pushed back the ignition point and had better leverage on the crank.

Adding fuel does not help reduce the chance of knock... It because it takes longer to ignite the fuel its like you just retarded you're timing.

obviously he didnt gain any power whatsoever from running rich.

how do i know? upping the boost 2 psi ONLY gained 12 rwhp because the blue run (higher power run) was alot richer at peak power RPM than the red run. ask anyone with a turbo KA and how much power they gain from each lb of boost.
Modified by klattr1 at 7:27 PM 9/20/2005

[s14det]

Before he sent me the ECU, I asked him what the stock FPR was and he told me to put it at 50psi base. Since that is what he has his tunes set for, I though it was strange to, but he said that is what he tunes for so that is what I set it at. I have sent him the dyno files and I should here back form tomorrow I hope.

[Red-KAT]

Ha... I did not see the PSI change at the bottom...

Well I would have been right if it were the way I saw it!

I am a turbo KA...

[klattr1]

Ha... I did not see the PSI change at the bottom...

Well I would have been right if it were the way I saw it!

I am a turbo KA...

its cool man. hard to notice everything sometimes.