Thread: JWT ecu and dyno tuning Sr20ve.

So i have decided on a jwt ecu from Andreas here on the forums, I have access to a dyno for fairly cheap for some real dyno tuning.

My question is with a jwt ecu tuned for an sr20ve, what timing is ideal on 93 octane with bolt ons Intake, header, exhaust? Also Is a nismo fpr ideal for this kind of dyno tuning?

I live in an emmisions county and I really need these EGR codes to go away before i can get it inspected any thoughts here? Also yes I searched 20 pages in tuning, so please don't say search. (For some reason the search bar didn't pull anything up).

One other thing anyone heard of using a 95 to 99 maxima maf on these engines?

Thanks.

Doesnt JWT say to set base timing at 15 degrees? You should use the maf that the jwt ecu is tuned for.

How do you plan on tuning? Just adjusting fp?

EGR is going to be the problem, maybe weld them to your VE Intake manifold and use Egr plug on your header.

what FP is the ECU tuned for? you have to run the FP that the ECU is set for, if your AFRs are too rich you can try turning it down a bit but that may not work for all the power curve.

You also have to use the exact same maf that the ECU is tuned for unless you are running a piggy on top of the JWT

No I plan on dyno tuning, wich I have never done before but I suppose you adjust timing until the power falls of and leave it there. As far as the fpr I guess I read somewhere that jwt usually run rich but you can help that problem by turning down the fuel pressure. I am running a brand new sr20de MAF as well.

With a JWT ecu, your only tuning options are to adjust fuel pressure to bring the WOT AFR to the range of 12.8-13.0 (that's were I get the power, others may have different experience) and then to increase timing from 15* upward in 2* increments until there is no power gain and no pinging. Do it in that order on the dyno. If you move timing above 15* with the JWT ecu, you should use high octane (93) fuel to avoid knock.

Because engines are different, it's hard to predict whether your JWT tune will make your car run lean or rich or in between. My JWT ECU made my VE run at nearly 15 AFR at WOT. It had to be changed by JWT through trial and error with them shipping me chips that I would put in the ECU and retest. All they were doing was changing the K value.

I have since found that there is much more safe power available from a custom tune that gives you the tight AFR for your car and is more aggressive with timing than the JWT tune. Also improved throttle response and drive-ability are available than typically provided by the JWT off-the-shelf tune which has to be conservative because it's a one-size fits all tune. I'd suggest that you look into some of the other tuning options available if you have not yet purchased your JWT ECu.

I'm not knocking JWT, they were pioneers with this stuff and very capable. The fact is just that a tune for your specific car is going to work better and is within reach cost-wise and technology-wise now, where it was not 10 years ago.

You said it Bill.