Cam differences (turbo vs NA)

[mcbrat]

so, how would the cam differences between turbo and non affect engine run/performance.... more specifically I suppose, is how (if at all) would the cam angle sensor and it's signal be affected....

 

granted, it could just be the ECU, because the engine it's all "wrong"

but I still have a "spot" where the engine gets a bit funky, and I either gotta give it more gas, or let off totally.... then I can go again.

 

If I'm smoother on the throttle, it seems to do better than if I stomp it down...

 

For reference, franken engine consists of:

ej25 (NA) block

ej25 DOHC heads ('96 with HLAs)

ej25 flat top pistons

ej22t crank/rods

ej20g intake manifold, 440 injectors, vf8 turbo

WRX tmic w/TurboXS bypass valve

very short intake with cone filter.

ej22t ECU

[Jerry DeMoss]

What type IAC do you have on that setup? Sounds like the ecu is not liking some signal coming from the engine/intake manifold so it doesn't respond imediately to it. I guess I am a little stumped.

[mcbrat]

What type IAC do you have on that setup? Sounds like the ecu is not liking some signal coming from the engine/intake manifold so it doesn't respond imediately to it. I guess I am a little stumped.

 

it's the ej20g IAC.

 

it's been cleaned, and adjust a bit too... (much better idle after that...)

[audio_file]

when you get that in depth, its really best to use some kind of piggyback fuel management system, i'm sure your problem just has to do with the fact that you've got this massive fuel and air supply which is outside of the ECU's adjustment capabilities, and it doesn't know what to do . . .

 

heard great things about the megasquirt system for the money . . .

 

check out this linkey for other options

 

http://en.wikibooks.org/wiki/Nissan_240SX_Performance_Modification/Ignition_and_Fuel_Management/Aftermarket_ECU

 

chris