58 or 52 mm TB?
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Joined: Oct 2005
Posts: 508
From: Niles, Michigan
58 or 52 mm TB?
rebiulding to 355 and doing some mods, ported heads w/ 2.02/1.6,306 cam, Hooker long tubes 30 lb inj,and cai along with tune, was wondering what tb to use . I don't ( at this time ) plan on adding NOS, is the 52 sufficient?
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Joined: Oct 2003
Posts: 2,140
From: DOVER DE
Re: 58 or 52 mm TB?
It's up to you but your setup will never come close to out flowing a 52mm TB. The stocker flows about 650CFM and a 52mm will flow about 750-775CFM. Most people go too big in this area.
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Joined: Nov 1998
Posts: 575
From: St Charles MO, USA
Re: 58 or 52 mm TB?
if you have your intake off just go for the 58
i did a swap on a 330 hp car on the dyno from a stock to 58 and it gained 10 hp all the way up the rpm band.
the intake was already ported for the 58
really your not going to run into loosing velocity with it so you really cant go too big.
i did a swap on a 330 hp car on the dyno from a stock to 58 and it gained 10 hp all the way up the rpm band.
the intake was already ported for the 58
really your not going to run into loosing velocity with it so you really cant go too big.
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Joined: Oct 2004
Posts: 1,130
From: las vegas
Re: 58 or 52 mm TB?
as long as your intake is modded at the mouth go for the 58mm your engine can only ingest as much air as it needs weather you have a 52 or 58,going to a 58 also allows you to expand later rather than to try and sell old to move up.
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Joined: Apr 2000
Posts: 1,070
From: Austin, TX or Texas State University at San Marcos
Re: 58 or 52 mm TB?
Originally Posted by RE AND CHERYL
It's up to you but your setup will never come close to out flowing a 52mm TB. The stocker flows about 650CFM and a 52mm will flow about 750-775CFM. Most people go too big in this area.
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Joined: Nov 2003
Posts: 1,211
Re: 58 or 52 mm TB?
Originally Posted by blkchevyz
if you have your intake off just go for the 58.
That's probably the best thing to do. If you have the intake off anyway and you have yet to buy either a 52 or 58, then you might as well go for the 58.
Keep in mind that a tune will be needed and the trittle tip-in may be a bit abrupt for your taste, but since it's port fuel injected you don't need to worry about vacuum signal like you do with a carb.