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Tru2Chevy · 03-10-2009, 05:40 PM

Because your engine doesn't need the extra airflow of the 58mm TB, and therefor won't be using that extra air delivered by the 58mm TB, the intake velocity will be slowed. It's not really anything you can tune for.....the only time you'll need that larger TB is if you go big cubes or head / cam or FI.

- Justin

03-10-2009, 05:40 PM	#13
Tru2Chevy Co-Founder / Site Admin Join Date: Jul 2004 Location: Ewing, NJ Posts: 22,476 iTrader: (8) Social Networks:	Because your engine doesn't need the extra airflow of the 58mm TB, and therefor won't be using that extra air delivered by the 58mm TB, the intake velocity will be slowed. It's not really anything you can tune for.....the only time you'll need that larger TB is if you go big cubes or head / cam or FI. - Justin __________________ 1999 Camry - Beigemobile DD 2002 Suburban - Wife's DD 2004 Grand Cherokee - Not running / Project / Selling?