Jester Callout #0003

[roo]

Ready to race yet?

[Cobra Commander]

The Mullet is cleaning the streets.

[roo]

Someone has to clean up. There is rice everywhere.

[Cobra Commander]

lol

[David]

:ddrice:

[JesterMX6]

u gonna be out tonight? i'm not ready to race...but i'll race anyway.

[JesterMX6]

by not ready i mean the car still sputters and surges. but i'll still race it. should be good for within a couple cars at least.

[roo]

Sure. Is it cool if I pull my trailer during the race?

[JesterMX6]

no problem. i wont race you if i can't hear the ac/dc though.

[roo]

I threw the tape player out the window after it ate my def lep tape so there will be no tunes except for that sweet V8 rumble

[JesterMX6]

:(

[roo]

What time are you thinking?

[JesterMX6]

did u see the thread in the private section? that's the plan.

[roo]

TPI FTMFW!!!

[JesterMX6]

mullet by 3

valve springs get changed tomorrow.

[Johnny]

geezuz, you have so many problems with that damn car

[JesterMX6]

no. same problem.

[roo]

Has it ever ran right?

[JesterMX6]

i'm not sure. when i first got it i was only running 8lbs of boost and had no problems. and if i run 8lbs now it runs fine. so maybe when i got it, if i'd have been running 15lbs like i am now it might have run shitty. my guess is no. its never "run right"

but if i turn the boost down the sputter goes away

[roo]

I'm assuming the theory is that you have weak valve springs and under higher boost the pressure builds up enough to push the valves back open during the compression and power stroke to cause a misfire? It almost seems unlikely that 8 psi is going to make the difference between the valve staying shut or blowing open. You have to figure the cylinder pressures are going to be far greater pushing against that valve to keep it closed then the boost pressure trying to open it.

Are you sure you don't have an injector misfiring under higher duty cycles?

[JesterMX6]

i've replaced injectors already.

[roo]

Are you working the injectors beyond their duty cycle at 16 psi? What about the maf? Any type of logs showing what is the ecu is seeing and doing at that point in time?

[JesterMX6]

shouldnt be anything beyond the cycle. its no more than i've done in the other car. and everything off the other car is on this car. ecu, injectors, fuel rail, filter, everything. everything EXCEPT the head. so i'm switching springs (plus a thicker shim) to see if it helps.