[al lkosmal]

Originally Posted by Classic 911

Hi all.

I have a tuning question I hope someone can answer, perhaps Al would be so kind to give me some tips?

I have a 3.2 short stroke with RSR cams and 46mm PMO ITB’s that idles quite low when cold, around 700rpm’s.

It idles nice around 950-980rpm’s when warm.

I would like to get the cold idle up to the same as when warm.

Thanks in advance for all help.

Cheers


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Greetings........jpnovak summed it up very well......EFI can be tuned to provide decent cold starting...but it is a bit of a trade-off between cold RPMs and Warm/hot RPMs.....those that do not like the cold/low rpms.....are used to the cold start mechanisms that add air......typically need to add a device to compensate....do you have an early car with the hand throttle? If not, you might consider installing an Idle Air control valve (IAC) or...I've seen mentioned the drive by wire type throttle actuator (I've not used this yet, but might have to try it soon). However...I like simple and the hand throttle is my preference for cold starts...early mechanical, blended with new EFI..........thats just me, i could be wrong....

regards,
al