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[SCR48]

Hey All

Ok So i got R33 S2 mods are

cat back zorst

R34 stock turbs

Vi-pec ECU

EBC

Pod

Catch can

Plumback BOV

Im currently having overfueling issues where its blowing alot of smoke and getting the old black match on the back of the car near zorst..... I was wondering if anyone could help diagnose the problem. Can was tuned to run 8psi on low and 11 on high and only makes 187rwkw's...

I also about a month ago changed from a Atmo BOV to a Plumback BOV... The tune was with the Atmo one on so could this be a contributing factor or ? also i think a mate cranked the boost up a few psi when he borrowed it as its seems to smetimes get up to about 13psi on gauge but that may just be a dodgey gauge reading.

Any help will be greatly appricated.. cheers

[paulr33]

my suggestions

get it tuned on the safest possible boost you can run, so 11-12psi, why bother with "hi" and "low"

get the tuner to drive the car on the road with you driving, and get them to wideband tune it and lean out the cruise AFR's

basically it sounds like youve been given a max power tune which is where the plonk the car on the dyno

do the basic settings, set your boost, floor the ass out of it on the dyno and tune the max power curve and settings

now thats great if you constantly drive your car at full throttle non-stop, but im guessing, like most owners

you are typically on max throttle about %5 of the time, the other 95% is on light cruise

so its critical as part of the tune, they either tune the light cruise AFR's on the dyno, it has some sort of auto-extrapolating, or the tuner does manual guess/extrapolate

or they drive it on the road and tune with a wideband sensor

also double check 02 feedback is on, if this ecu supports it

without 02 feedback, it will waste some fuel and become black

but without 02 feedback or 02 sensors a proper on-road wideband tune will negate the need for it