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> cai troubles again..., track testing
post Oct 16, 2003 - 1:25 AM
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aznpnoy12



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ok, well i just got back from sacramento raceway. i had a good time and all, but i was really disapointed with the times i got. the last time i went there my best time was 17.58, that was with my shortram intake. now i have a cold air intake, and after a few runs my best time came out to be 17.62. can somebody help me? can it be the diameter of my intake? i am running 3" diameter on the intake pipes. if so i think im just goin to go and make one with a 2.5" diameter. what do you guys suggest?
 
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post Oct 16, 2003 - 12:27 PM
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Kwanza



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QUOTE (aznpnoy12 @ Oct 15, 2003 - 11:25 PM)
ok, well i just got back from sacramento raceway. i had a good time and all, but i was really disapointed with the times i got. the last time i went there my best time was 17.58, that was with my shortram intake. now i have a cold air intake, and after a few runs my best time came out to be 17.62. can somebody help me? can it be the diameter of my intake? i am running 3" diameter on the intake pipes. if so i think im just goin to go and make one with a 2.5" diameter. what do you guys suggest?

Actually, I've test run both a 2.5" CAI and a 3" CAI... and for me, the 2.5" felt a bit restrictive... like it was losing a lot of the bottom end. The smaller diameter added with the longer distance and the bends, I would imagine, would slowdown the charge velocity... causing some small losses in the lower torque band... while with the larger 3" piping... I didn't feel that same loss. It doesn't feel any different in the high-range than that of a 2.5" intake either. All-in-all, bigger is not always better... there is a "too big" point... however, in this case, where you have 3" piping as opposed to 2.5" piping... the differences between the two are very minor... it's more of a prefrence thing. I personally like the 3" piping much better than the 2.5"...

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