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I've been both routes.... so I can say from experience I guess.... here's what I have to offer on the subject

Mail order: CJ @ JMS did an outstanding job with my chip. The car was still very much rich but close (right around 10:1 a/f) which isn't bad at all and very safe/conservative

Dyno: Got the can dyno'd @ True Blue Performance and got the a/f consistent throughout the power band right around 11.3/4 .... we also worked out some idle issues.

Obviously dyno tuning is much better because you can tweak as you go without waiting on mailing stuff back and forth which can take up to a month (a few days to send the chip and about 3 weeks or more to get it back).

Mail order is around $300
Dyno tuning is anywhere from $75+/hour :) (approximate #'s)

Good luck!
 

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Discussion Starter #3
So on average, how long is needed on the dyno to get the tune right?
 

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It’s difficult to develop one set of parameters that can function safely anywhere in the country.

There are too many variables such as elevation and regional gas quality.

The right way to do it (especially sc'd or nos) is a dynojet 248c with a high-end wide-band air/fuel ratio analyzer.

Most people do not have this luxury or money to do it this way.

But on the other hand most chip companies (including ourselves) have alot of experience and do have a great all around chip for most 32v applications.

Its really your own personal preference or accesibility to a dyno.
 
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