Originally posted by Seawulf: I've read, Tom says to put around 3 feet of straight pipe before the MAF in a blow-thru setup to help get rid of turbulance problems.
3 feet eh...
Straight out the hood or the fender...
I don't know where else you are going to fit 3' of straight pipe.
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Back on the subject.
I don't like a blow through for one reason. Heat. The hotter the intake charge the less airflow the MAF read. The less airflow the MAF reads the less fuel. (load & airflow readings) The less fuel the leaner it gets. That's the exact opposite you want to happen as the intake charge temperature rises.
You just can't accurately tune for that on a dyno. A dyno tunes your settings at that specific time & conditions. When the ambient goes up, your intercooler efficiency drops, or anything that causes the charge temp to rise it will effectively lean out the engine. BTW - IAT only affects timing if you were thinking about that.
That means you can leave the tune overly rich & not very efficient or gamble. Also the PCM's adaptive control is going to slightly work against a blow-through setup.
2000 SVT #674
13.47 @ 102 - All Motor!
It was not broke; Yet I fixed it anyway.
