Thread: Post Actual JimWolfTechnology (ECU) Dyno Results

Car went 12.9xx @105ish

usdm sr20
T25 turbo @10psi
3in turbo back
370's @ 3bar
bored MAF

Im loving the info. Keep it coming. I'm planning to go turbo and im liking the numbers im seeing with the jwt ecu

321/300 - SR20DE+T

GT2860RS | GTI-R Manifold | S4 Cams | 555 Injectors | JWT ECU | 3" Turbo Back | JGY IC | HKS EZ BC | Water Injection

I thought the JWT ECU was great. Rock solid AF. Hitting the dyno again soon with external wastegate, upgraded intake manifold, upgraded turbofx bellmouth downpipe. Hoping for a nice jump in power.

I think the super sentra will put down 480whp on 18psi on the JWT tune. And perhaps 500+ on 20-21psi. Dynojet numbers, of course.

Dynomite said 464whp on 19psi at dyno day.

My b13 made 354whp on 18psi. Mods = jwt ecu, 72lb inj, z32maf, sc52 turbo. My only issue with the jwt tune is it runs crazy rich. My car runs 9.7-10.5 af ratio on 18psi. This was all done on a never opened sr20det and in 100+ degree weather here in fl.

I have seen alot of SR20 turbo setups come and go and 75% of the time why these cars run rich is because of user error.

Most of the time guys put in 255 high volume Walbro pumps and they never put on a FPR to control the pressure. SR20DEs run at 44 PSI hose off and about 37 PSI hose on. With the Walbro 255 in place with stock FPR, fuel pressure is at 59-64 PSI hose on.

Vacuum leaks when under boost metered air escapes and the car runs rich.

BOV vented into the atmosphere.

All my turbo JWT ECUs have run between 11.0-12.3 and thats fine with me.

If it's running rich or wrong call up JWT.

They retuned my ECU(for free) for me and 'updated' my tune with the information I gave them.

I was really impressed by their customer services. I'm sticking w/JWT and recommend them to others who will listen.

-G

Its time you dynojet that Monster and Try the SR16 Cammies too lol
Man i cant stop watching these, BTW lets gets some more numbers people

I think the JWT maps are decent if you build the car around what they tuned for. The GT3076r worked awesome with the JWT computer, but the engine was choked up with that turbo.

Now I have the 6262 and there is a very noticeable flat spot in the map at 3000rpm. This is where the ECU pulls timing back, regardless of actual airflow. When I talked to JWT they didn't have any answers for me. But they actually asked if I was switching the exhaust cam, which of course I am, but not till 5000rpm. They don't really have any answers for me.

Now, the flat spot in the map seems to be related somewhat with the CTS because it only happens when warm, not hot.

It seems very similar to the other issue I have with their tune. When the engine is warming up, there is a heavy hesitation and bucking going on just when the needle on the gauge starts to move. Around 120*F or so. You either need to drive around this hiccup or wait for the engine to warm up completely. It is interesting because now I am using the KOYO radiator and the engine has a little trouble staying warm when the heater is going and it is really cold out.

Those issues are easy to drive around, and are one more reason to have the right tune. But like I said, this issue seemed to manifest when the new turbo was put on and the lag pushed the boost threshold to 4000rpm to get 5psi. The TS GT3076r had over 10psi by then, just enough boost that you didn't notice the dip in the timing.

Interesting though when you look at all my datalogs you see that the timing gets pulled way before the boost comes on. If max boost was 5000rpm, it was pulling timing back to ~8* at 4000rpm iirc.

I can't complain though. The car passes emissions here. Its fast as hell just running on wg spring pressure.

Coheed your basically hitting the columns of the map that are meant for boost while your off boost. A retune would definitely fix that.

Also with the flat spots, I've seen those on my car too while it was at 120*F-140*F Adding a little more fuel to the cold enrichment table fixed that .

It's crappy that JWT is not really wanting to work with you to get a proper tune. I think it's time you step into the fully tunable ECU world .