I'm still debating about the SC (won't happen until Christmas time if I do) and I was wondering if I could get away with running my 7000rpm NA-tuned JWT ECU? The ECU tunes for A/F and advances timing at various places from 3500+rpms. On 92 octane and hot weather I've noticed no pinging which leads me to believe the timing really isn't advanced to far over stock. If I get the SC, I pretty plan on staying with the 3.6" pulley for the most reliability. So would I be crazy?


Dave

 

The SC fmu will override any afr tuning provided by the ECU, but the advanced timing is something to worry about. Maybe you can find out from JWT how much the timing is advanced and at what rpm range? If the timing is only advanced in the midrange and left alone at high rpm, then you'll be okay at high rpm where you make maximum boost. Might be a great combination.

 

Advanced timing + boost = BOOM. JWT provides programed ecus for boosted 3-gens. They can probably reprogram yours for SC boost also. Shouldn't be that expensive. I "hear" $100 or so?(provided you bought their ecu already). If you do this, you can eliminate the need for the boost referenced FPR. JWT can adjust the fuel injector pulsewidth instead of just ramping up the fuel pressure. Depending on the boost levels, you might need bigger injectors.

 

Brodaiga is running 13 psi boost and advanced timing provided by a JWT ECU, along with 300zx injectors. Might want to pm him.

http://forums.maxima.org/showthread.php?threadid=218674

 

JWT told me they'd reprogram an existing JWT ECU for $100, this was back last year.

 

Hopefully they'll honor that. $100-150 sounds reasonable to me since I already gave them $580. I'm sure all they have to do now is literally plug it it and upload the "SC program".

Are you still thinking about the SC route?


Dave

 

I wouldnt do it, just aint worth it with out some protection like a J&S But the JWT is plug and play, J&S is not.

 

I wouldnt do it. Not worth the cost of a new engine. I know JWT had problems with its S/C program at first too, so I deffinetly wouldn't use the NA program with boost...

 

No I think I am going to stay N/A and see what this motor can do if I crack it open.

 

Since you have a JWT ecu ditch the FMU and other bandaids all together. Just get some 370cc injectors and have the ECU reprogrammed for 3 or 4 bar fuel psi + 370cc injectors. Your car would detonate at part throttle with a NA ecu vs a programmed one. Since JWT has tuned I30krab's car, the SC program should be pretty good right out the box. It probably won't make as much power as Mardi got out of his car, put it's plug/play and you don't have to worry about tuning it.

 

Matt,

What does the J&S do above and beyond what the OEM knock sensor does? Does it come with its own KS or do you tap into the OEM one? Does it require dyno tuning? Sorry for all the questions, but it sounds like a good thing to have, maybe.

 

OE knock sensor is ignored by the ECU at WOT.

www.jandssafeguard.com for all the info...

 

yes he is you are correct!

 

So is he running a SC program ECU or a NA program ECU?