what does a shop charge to do a tune mines pretty stock but going to do a few mods then take it in going to do cia gt40s, 65mm tb already had mac headers 2.5 duals pullies what kinda power should i expect to have after 90 gt is the car
Unless you really seriously change the cam and other things, it probaby is unnecessary.
You'd be amazed at how adaptive the stock EEC system is.
For example I ran an F cam, TFS aluminum heads, TFS intake, and full length headers and the stock 19lb injectors were fine with just a slight increase in fuel pressure. It was good for high 12's at 108 MPH with no tune at all, and A/F ratio was near perfect.
I finally had to tune the car after installing a blower and larger injectors on top of all that. It was over the 110 MPH range (350 HP) where I had to change injector and MAF parts, and change the EEC.
With a stock engine or mild mods like those listed, you wouldn't get enough improvement to justify the cost. What they do is put it on the dyno (usually $65 an hour), and typically it takes 3-5 runs to narrow it down while they tune it. Once they get it right, they take the data and burn a chip (usually $250- $300). It'd wind up being around $400 for it to be tuned.
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