T-3 Super 60 Dyno numbers using JWT ECU program - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

fastpace · 05-21-2005, 11:41 PM

Well I have had my turbo setup for almost a year and have finally dynoed my car. I was happy with my results, but glad that I know where it is at now.
My setup:
JWT ECU w/ 50lb program
Cobra MAFS
550cc injectors
255 lph walbro fuel pump
Turbo: Super 60 T-3 turbo

The first lines are at 7psi
The second line is at 11psi
The third line is at 13 psi

It seems like the turbo is coming alive after every increase in boost level, but the big problem is the a/f ratio, it is just crazy, at 3500 rpm the a/f ratio is below 10 a/f. Looking at the 3600 rpm level the horsepower and torque curve drop until 5200 rpm. It must mean that the a/f ratio is significantly lower than the 10. There is easily power to be had from all three boost settings. All three pulls were done on 3rd gear. In the mean time I plan on getting a safc to improve the a/f ratio, which should also improve throttle response.

Let me know what yall think about the dyno numbers.

*Jeff240sx* · 05-21-2005, 11:58 PM

Those A/Fs suck. I'd send it back to JWT I think. That's nearly undrivable.. and seems to be what I have (with my 18mpg).
The dyno curve scares me too.. it's a parabola. And shouldn't be. Your peak torque isn't where it's supposed to be, and seeing as a turbocharger is supposed to increase the stock curve (and not make it's own curve), you have a massive issue. 7psi = 130hp shows this issue. I've seen stock KAs dyno at 144rwhp.
-Jeff

klattr1 · 05-22-2005, 12:03 AM

550cc side feeds on a system designed for 525cc top feeds (50lb) is the problem for sure.

KOUKI KA-T · 05-22-2005, 12:25 AM

Good god man.

That's absolutley terrible. At 7psi you've actually lost or made no power over a stock 240.
I made nearly 220rwhp at only 6psi on a tiny ass z31 T3, 370's and safc.

The A/f's on this dyno graph are not accurate though. I use a plx m300 wideband and tuned this car via street pulls to 12:1 and 12.5:1 after peak torque and then dyno'd it to see how well I did. Dyno reading are from the dyno facilities 02 sensor that they stuck in the muffler after the cat so they read about a point leaner and seem to richen up after peak torque...
-Sean

wootwoot · 05-22-2005, 01:52 AM

That torque is super confusing. super 60's are extremly fast spooling turbos, thats just whacky. I bet everything is in your tuning. Ditch that JWT shite and step up to Enthalpy. He has customer service and can dial it in to your needs almost out of the box. The only problem is that you would need to ditch the Cobra MAF for him. Sucks that it has been so long because I would honestly demand a refund from JWT if it was any sooner. Sorry for not being supportive of the dece 13psi numbers but that isnt right. You should be making what you are at 13psi at 10psi with more torque and a better curve/power band

TheSnail · 05-22-2005, 04:00 AM

Damn! That sucks. Im guessing your rear bumper is black?. But for real, invest in a widband and a fuel controller, and dont let those numbers have your nickers in a twist.

*Jeff240sx* · 05-22-2005, 10:28 AM

550cc injectors running on a 525cc program seems like a 5% too rich issue. I'm probably wrong, but can't that be translated to 5% of a/f's being off. I can't see that making the parabola, and losing power vs. stock.
Fastpace, see Kouki's graph? That's the type of curve that all KA-Ts make. Mine, Klattr1s, [email protected]'s. Different heights, but 240sx stock torque peak (4400rpm) usually remains within a few hundred rpm. Yours got shifted a thousand, making me thing there's a bigger issue (timing? fuel in the single-digit area (9:1)?)
-Jeff

fastpace · 05-22-2005, 12:20 PM

Quote:

Originally Posted by TheSnail

Damn! That sucks. Im guessing your rear bumper is black?. But for real, invest in a widband and a fuel controller, and dont let those numbers have your nickers in a twist.

Yep, the bumber is black, all the time. I am going to call jwt and see what they say, I might just send it back in and get it programmed for the 550cc injectors. Just by looking at the curve I think the a/f ratio is in the 7's because of the huge deep it is in the middle range.

Oh yeah here is a pic of the bumper:

fastpace · 05-22-2005, 12:33 PM

Quote:

Originally Posted by Jeff240sx

550cc injectors running on a 525cc program seems like a 5% too rich issue. I'm probably wrong, but can't that be translated to 5% of a/f's being off. I can't see that making the parabola, and losing power vs. stock.
Fastpace, see Kouki's graph? That's the type of curve that all KA-Ts make. Mine, Klattr1s, [email protected]'s. Different heights, but 240sx stock torque peak (4400rpm) usually remains within a few hundred rpm. Yours got shifted a thousand, making me thing there's a bigger issue (timing? fuel in the single-digit area (9:1)?)
-Jeff

I honestly think it is the program I have, the injectors are too big just by alittle for the program. What was the lowest a/f ratio you had on your JWT at the time? I drive the car daily and haven't witnessed any problems driving. The only thing that has happened at times is an idle issue that happens once or twice when I am at a stop light, it bounces from 200-700 and then corrects itself. The weird thing is that I average 20 mpg when I am not on it. I will eventually get a wideband and see what I am runnin.

***S14DB*** · 05-22-2005, 01:49 PM

Usally you'll get better MPG off boost cause the spining turbo gives the motor a little better volumetric efficiency. If you can't tell by your bumper you're blowing gass out you rear. The injectors would only make a half point change in your a/f. I say the JWT program sucks and is your problem. this is why most people use a AFC with the JWT. I would send him the dyno and demand your money back and them get some better management. You should be able to hit 50hp more at least.

fastpace · 05-22-2005, 02:04 PM

Quote:

Originally Posted by S14DB

Usally you'll get better MPG off boost cause the spining turbo gives the motor a little better volumetric efficiency. If you can't tell by your bumper you're blowing gass out you rear. The injectors would only make a half point change in your a/f. I say the JWT program sucks and is your problem. this is why most people use a AFC with the JWT. I would send him the dyno and demand your money back and them get some better management. You should be able to hit 50hp more at least.

Yeah I knew just by the bumper and the smell of gas inside the car. I will let yall know what they say tomorrow, if I would have to spend more than 500 bucks to fix the richness problem I am just going to go aem standalone.

klattr1 · 05-22-2005, 02:22 PM

most 50lb/cobra mafs JWT ecu programs tend to run high 10's in the afrs in the first place. so put in bigger injectors than what its programmed for, i would be willing to believe it could be in the mid 9's (unreadable on the chart).

05-21-2005, 11:41 PM	#1
fastpace Zilvia Addict Join Date: Jul 2001 Location: Houston, TX Age: 39 Posts: 689 Trader Rating: (0) Rides Gallery: fastpace Feedback Score: 0 reviews	T-3 Super 60 Dyno numbers using JWT ECU program Well I have had my turbo setup for almost a year and have finally dynoed my car. I was happy with my results, but glad that I know where it is at now. My setup: JWT ECU w/ 50lb program Cobra MAFS 550cc injectors 255 lph walbro fuel pump Turbo: Super 60 T-3 turbo The first lines are at 7psi The second line is at 11psi The third line is at 13 psi It seems like the turbo is coming alive after every increase in boost level, but the big problem is the a/f ratio, it is just crazy, at 3500 rpm the a/f ratio is below 10 a/f. Looking at the 3600 rpm level the horsepower and torque curve drop until 5200 rpm. It must mean that the a/f ratio is significantly lower than the 10. There is easily power to be had from all three boost settings. All three pulls were done on 3rd gear. In the mean time I plan on getting a safc to improve the a/f ratio, which should also improve throttle response. Let me know what yall think about the dyno numbers. __________________ life is what you make of it!!!! "well, I go out, I do the practice, I think about it and I concentrate on one small thing I can change that will have an effect. I make that change then I go out and drive to my maximum." -Ayrton Senna

05-21-2005, 11:58 PM	#2
Jeff240sx I hate you too... Join Date: Jul 2001 Location: Tampa, FL Age: 38 Posts: 5,828 Trader Rating: (0) Rides Gallery: Jeff240sx Feedback Score: 0 reviews	Those A/Fs suck. I'd send it back to JWT I think. That's nearly undrivable.. and seems to be what I have (with my 18mpg). The dyno curve scares me too.. it's a parabola. And shouldn't be. Your peak torque isn't where it's supposed to be, and seeing as a turbocharger is supposed to increase the stock curve (and not make it's own curve), you have a massive issue. 7psi = 130hp shows this issue. I've seen stock KAs dyno at 144rwhp. -Jeff __________________ Whatup?

05-22-2005, 12:03 AM	#3
klattr1 Leaky Injector Join Date: Dec 2002 Location: SC and NC Age: 38 Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	550cc side feeds on a system designed for 525cc top feeds (50lb) is the problem for sure. __________________ KA24DER.com - Buy your supercharged KA24DER kits here!

05-22-2005, 12:25 AM	#4
KOUKI KA-T Zilvia FREAK! Join Date: Feb 2003 Location: Portland, Maine Posts: 1,085 Trader Rating: (0) Feedback Score: 0 reviews	Good god man. That's absolutley terrible. At 7psi you've actually lost or made no power over a stock 240. I made nearly 220rwhp at only 6psi on a tiny ass z31 T3, 370's and safc. The A/f's on this dyno graph are not accurate though. I use a plx m300 wideband and tuned this car via street pulls to 12:1 and 12.5:1 after peak torque and then dyno'd it to see how well I did. Dyno reading are from the dyno facilities 02 sensor that they stuck in the muffler after the cat so they read about a point leaner and seem to richen up after peak torque... -Sean __________________ My car has been sold

05-22-2005, 01:52 AM	#5
wootwoot Post Whore! Join Date: Jan 2004 Location: sarasota florida biatch Age: 35 Posts: 3,850 Trader Rating: (0) Feedback Score: 0 reviews	That torque is super confusing. super 60's are extremly fast spooling turbos, thats just whacky. I bet everything is in your tuning. Ditch that JWT shite and step up to Enthalpy. He has customer service and can dial it in to your needs almost out of the box. The only problem is that you would need to ditch the Cobra MAF for him. Sucks that it has been so long because I would honestly demand a refund from JWT if it was any sooner. Sorry for not being supportive of the dece 13psi numbers but that isnt right. You should be making what you are at 13psi at 10psi with more torque and a better curve/power band __________________ I'm from Florida so I'm probably a bit more strange than you

05-22-2005, 04:00 AM	#6
TheSnail Nissanaholic! Join Date: Jan 2004 Location: Marietta Georgia Age: 39 Posts: 2,434 Trader Rating: (0) Feedback Score: 0 reviews	Damn! That sucks. Im guessing your rear bumper is black?. But for real, invest in a widband and a fuel controller, and dont let those numbers have your nickers in a twist.

05-22-2005, 10:28 AM	#7
Jeff240sx I hate you too... Join Date: Jul 2001 Location: Tampa, FL Age: 38 Posts: 5,828 Trader Rating: (0) Rides Gallery: Jeff240sx Feedback Score: 0 reviews	550cc injectors running on a 525cc program seems like a 5% too rich issue. I'm probably wrong, but can't that be translated to 5% of a/f's being off. I can't see that making the parabola, and losing power vs. stock. Fastpace, see Kouki's graph? That's the type of curve that all KA-Ts make. Mine, Klattr1s, [email protected]'s. Different heights, but 240sx stock torque peak (4400rpm) usually remains within a few hundred rpm. Yours got shifted a thousand, making me thing there's a bigger issue (timing? fuel in the single-digit area (9:1)?) -Jeff __________________ Whatup?

05-22-2005, 01:49 PM	#10
*S14DB* AFC #1 Join Date: Oct 2003 Location: 昨晩あなたのお母さんの家 Posts: 20,181 Trader Rating: (3) Feedback Score: 3 reviews	Usally you'll get better MPG off boost cause the spining turbo gives the motor a little better volumetric efficiency. If you can't tell by your bumper you're blowing gass out you rear. The injectors would only make a half point change in your a/f. I say the JWT program sucks and is your problem. this is why most people use a AFC with the JWT. I would send him the dyno and demand your money back and them get some better management. You should be able to hit 50hp more at least.

05-22-2005, 02:22 PM	#12
klattr1 Leaky Injector Join Date: Dec 2002 Location: SC and NC Age: 38 Posts: 112 Trader Rating: (0) Feedback Score: 0 reviews	most 50lb/cobra mafs JWT ecu programs tend to run high 10's in the afrs in the first place. so put in bigger injectors than what its programmed for, i would be willing to believe it could be in the mid 9's (unreadable on the chart). __________________ KA24DER.com - Buy your supercharged KA24DER kits here!

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