12-15-2010, 01:55 AM
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#11 (permalink)
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Join Date: Dec 2008
Location: CALIFORNIA
Posts: 913
Drives: 370Z
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Quote:
Originally Posted by toner123
hey sam on a car with after market exhaust and test pipes is it ok to go from the tail exhaust then or will that also cause to have a lean apearance. Also I would imagine that the 11.8 is the same for both TT and S/C cars. So at what point does the AFR start to become not so optimal to you guys? Finnal question when running data logs I know you mentioned before that they tend to read a little higher then what it really is, so does the little higher varry between each car or is there a set formula you guys use once you get the afr off the ECU. Sorry for all the questions but found this to be a great opertunity to educate my self. Thanks
Frank
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Yes it is, Ultimately the closer you are to the engine the more accurate samples you will get. with having test pipes in place taking samples out of the tail pipe will be good enough.
Ideally 11.5 to 11.8 is the desirable AFR ration for forced induction, different fuel will require leaner AFR like C16 race gas.
Sam
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