yup 
undecided
Safety Car
Joined: Jan 2004
Posts: 3,783
Likes: 15
From: Northern California
Install, Neither...
The stock throttle body flows enough air to support 400 hp. A 52mm or 58mm throttle body will add nothing to a stock engine.
Exhaust and runners will add maybe, 5hp to your "91" Vette.
.
The stock throttle body flows enough air to support 400 hp. A 52mm or 58mm throttle body will add nothing to a stock engine.
Exhaust and runners will add maybe, 5hp to your "91" Vette.
.
Last edited by GKK; Oct 13, 2013 at 12:16 PM.
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Verdad Gallardo
Safety Car
Joined: Jul 2001
Posts: 4,871
Likes: 15
From: Detroit's West Side MI
I had a 52mm on my LT1 383 engine. I reinstalled the stock 48mm TB at one point trying to choke off power (to stay in class) and made about 12 hp more on the dyno...
Just throwing parts at the engine is usually a waste of time, it's a complete system.
Just throwing parts at the engine is usually a waste of time, it's a complete system.
Melting Slicks
Joined: Sep 2008
Posts: 2,376
Likes: 111
From: Cherokee National Forest TN
stock 48mm = 783 CFM. IMHO stock is to big for a L98 engine that will not breath
past 5000 rpm.
Flow rates here:
http://gmtuners.com/flow/
past 5000 rpm.
Flow rates here:
http://gmtuners.com/flow/
Team Owner
Joined: Jul 2004
Posts: 28,462
Likes: 3,288
From: Hartford WI
As a side note, when they say that the part is worth 20 HP it usually means in conjunction with the rest of the system.
Race Director
Joined: Feb 2003
Posts: 16,475
Likes: 270
From: Kingman AZ
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