Jwt ecu tune limits

[rn240sx]

My 1st setup was the 370cc inj tune and according to jwt it would support 260 flywheel hp which equates to ~215 whp.... Although 370's have been proven to support 250 whp....I ran this setup no more than 10 psi and had zero problems and my wideband was ALWAYS rich..!! And i guesstimated about ~235 whp due to my turbo size, etc....

I then upgraded to the 615cc inj program and i dont recall how much flywheel hp they said it would support. But i think it was somewhere between 300-350 flywheel hp ( im not sure, so dont quote me )

I then went up to 15 psi and ran it for 6 months with no problems and the wideband was always in the low 10's... and this was guesstimated to be at ~300 whpAccording to several sources, on paper, the 615cc inj would support 404 whp. Now i know real world numbers will be different.

My question is, do u think their 615cc program will support 350-375 whp..??

ThanksRobert

[virus77]

for sure it will, if you are running a low 10's a/f you can boost quite a bit more and get your A/F to around a 11.5/1, probably around 19 psi or so. You are probably gonna need a safc or something to fine tune though.

[Craving4Boost]

wow low 10's? thats pretty damn rich heh...either your a safe person or you didnt have anything to lean it out..

but yeah even 550's can get you to 350hp....

[rn240sx]

wow low 10's? thats pretty damn rich heh...either your a safe person or you didnt have anything to lean it out..

but yeah even 550's can get you to 350hp....

Its been like that since day one. I have not messed with it and i figured that was playing safe on stock bottom end at 15 psi..!!

[SeVa-S13]

Used SAFC's are so damn cheap these days, you should probably pick one up. DO you have anything that retards timing for when you run over 1 bar?

[jmwenick]

His ECU is tuned...

[SeVa-S13]

Not really. Sending off for a cookie-cutter ecu is gunna give basically a base map off which to fine tune, not a tuned car.

[HolyShiznit]

Not really. Sending off for a cookie-cutter ecu is gunna give basically a base map off which to fine tune, not a tuned car.

I think he was referring to the fact that you commented about retarding timing. I have never heard of ANYONE retarding timing even FARTHER than the JWT ecu already does. I have mine ADVANCED 2 degrees over stock, which means it is 2 degrees advanced over the JWT tune.

[Structure240sx]

615's are plenty, 550's are even fine to 400rwhp but its not the best thing to max them out for to long.

generally the jwt ecus drop timing to about 14-16 degrees total in full boost and ramps up to 17-19 degrees by redline

[S14tat]

when i talked to ben, the said that with 615cc's we can support alittle over 500 crank hp.

[Structure240sx]

that sounds right

[nissanfanatic]

Exactly what brand injectors are these?

[rn240sx]

Exactly what brand injectors are these?

I dont think it matters what brand they are...... does it..??

[nissanfanatic]

If they are deatschwerks injectors, and your flow sheet says ANSE on it, then you can add 15-20% on top of their rated flow.

[lelek240sx]

i know it is old post but runnin that rich is not really all that safe plus you loosing a lot power , i would get safc 2 and tuned to 11.7 to 1 this should be much better for power and safety too ( u don't won't to fuel wash off oil from cylinder walls ) if you still run this rich change your oil frequently

[Edub1]

It is quite the old post, but might as well ad to the knowledge bank.

The proper fix here is to contact JWT and have him re-tune it. Chances are, the tune is set up for a higher (400+)HP, higher boost setup. The fact that he is running so rich is an indication that JWT was tuning for greater boost/ air flow. I'd bet his timing is also more retarded than it ought to be at lower power level. He might also be set up for a different MAF because the stock MAF only corrisponds to ~ 460cc injectors or 270HP. A proper tune involves both timing and fuel, you don't want to just change one and not the other. Small changes perhps, but 10:1 to 12:1 is huge.

I am getting ready to tune for my turbo wich will run 460cc injectors, stock MAF ~270HP. Because the KA is so rich and there is so much room to ad timing, I'm only planning on pulling a couple of degrees here and there.

Solution - raise boost untill your A/F falls in line or have it re-tuned.