Thread: In Between Shifts Richness

i have same issue.... i went from 333cc to 370cc..... anyone have solve it other then new ecu or chips

Well I went back to 370cc at 4bar (420cc). No more richness between shifts, or at least not as bad. Gas mileage went up, will have a city only estimate once I fuel up again.

I believe the problem is not being able to tune the TTP Min on the B14's. Thus the pulsewidth times stay at the larger stock numbers.

Rob what ECU are you using? B14 or B13?

lol my VE backfires when i shift from 1st to 2nd alittle after 5K :P

hey i am running a b14 ecu I(calum basic for ve ) in a b15. Using a b15 to b14 harness adaptor. i Also have a vafc and 370cc injectors

Your injector latency might be set too high for the 370cc, thus they are flowing too much fuel. This is usually only a problem at idle, but could be affecting you in lower gears too.

Also fuel pressure correct?

ya my fuel psi is at 4 bar, and i was going to say its my ecu is setup for 333cc and i am running bigger injectors, so untill i find a bin for my new set up i will have to deal with the poping

Reduce your Fuel pressure and you should be grand. Make sure you monitor it with a wideband. 370cc at 4bar are about 420cc. Since 370cc is at 3bar, to get 333cc you would have to go to something like 2.5 bar.

ya but if i lower my fp, i cant run the amount of boost i am. like 370cc at 4 bar are rated to 300whp, so if i lower them to 3 or 2.5 would yeild less than 250 +/- whp or am i wrong

Ah I see, do you have a wideband? It's a tricky thing to play with without a good insight on what the engine is doing.

I'm actually surprised that your car even runs with 420cc on 333cc tune

ohh ya i do got a wideband, and the car runs great after it warms up, and it idles nice and smooth, but i have issue at start up, and when let off gass quick the car will stall out, and sometime it pops real loud


my car suprises me that it even runs dont worry, every drive is a quest

cheers