52mm or 58mm throttle body
01-27-2005, 01:52 PM
#1
Racer
Thread Starter
Member Since: Jul 2004
Location: nth ridgeville ohio
Posts: 330
Likes: 0
Received 7 Likes
on
5 Posts
52mm or 58mm throttle body
any opinions on which one would would perform better on a 383 with headers and straight exhaust ,super ram with forced air. tks
01-27-2005, 02:35 PM
#3
Burning Brakes
Member Since: Dec 2004
Location: Hanging out back with the dark horses. Wa.
Posts: 825
Likes: 0
Received 0 Likes
on
0 Posts
I talked to Redl98 and he does alot of Dyno work I had the same question. The answer I got was It won't hurt but unless you got a highly modified motor but it won't help. I put a BBK 58mm on my 88 5.7 and it works fine. My thinking here is more air in, more air out. If you do got 58mm you will need to port your plenum, not a big deal...Serving Proudly~ Jeff
01-27-2005, 03:53 PM
#4
Race Director
Member Since: Sep 2004
Location: St. Peters MO Sometimes you have to prove yourself by doing alot of killing or alot of dying...
Posts: 13,793
Likes: 0
Received 0 Likes
on
0 Posts
With a stock base or a ported base, the stock throttle body is more than adequate. But with an after market base such as the TPIS big mouth, there is a need for larger flow of air, so a 52mm is recommended. The 52mm will flow 900cfm of air tested with an airfoil.
The 58mm will flow 1100cfm and is ideal for 600+hp applications. The larger TB can hinder low end performance if a larger than needed size is utilized. There are also monoblade throttle bodies that flow 1300+cfm and are recommended for 420cid or more displacement or super high hp applications.
The 58mm will flow 1100cfm and is ideal for 600+hp applications. The larger TB can hinder low end performance if a larger than needed size is utilized. There are also monoblade throttle bodies that flow 1300+cfm and are recommended for 420cid or more displacement or super high hp applications.
01-27-2005, 06:13 PM
#5
Melting Slicks
Member Since: Sep 2003
Location: If you don't weigh in you don't wrestle Road America
Posts: 3,031
Likes: 0
Received 73 Likes
on
54 Posts
Hey just go with the happy medium 54mm throttle body from Arizona Speed and Marine that's what I have 
I would say that it depends on what you want out of your motor better throttle response at lower RPM go with the 52 if you want better flow for higher HP at the top end go with the 58 mm.
I would say that it depends on what you want out of your motor better throttle response at lower RPM go with the 52 if you want better flow for higher HP at the top end go with the 58 mm.
