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Old 04-06-2013, 09:39 PM   #155
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Member#: 53665
Join Date: Jan 2004
Chapter/Region: NESIC
Location: Northboro, MA
2011 STI Stg2 w/ ELH
Focal 2way Active w/ DSP


Originally Posted by BigRob74 View Post
my tuner knows they are maxxed out, and he has been tuning subes forever. its actually irrelevant to me, i am going with e85 and need larger injectors anyway. id rather spend the 500 for the injectors than 5 grand on a new motor..
Well, you're going with E85 so you do need them. But if you did not, I seriously question your need. Ask your tune how he knows your injector is too small. I'd really like to hear the assessment. Since someone has already written a good explanation, I will just refer to it:

Pretty much explains what IDC is. Again, it's a calculated value from IPW and it's OK for it to be little over 100%. The number is just a reflection of the IPW in relation to the intake stroke. Given that the intake valve stays open well past BDC at high RPMs, the chance that injector is spraying on a closed valve is very small.

I don't know your tuner and I am sure he is great but don't use runtime as a measure of competence. The two are really not synonymous.
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