BBC TPI Style Throttle Body Advice Needed
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Drifting
Joined: Oct 2003
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From: VetteMOD
St. Jude Donor '05-'07
BBC TPI Style Throttle Body Advice Needed
(A little background info) I am converting a 454 to port fuel injection with an Arizona Speed and Marine oval port, crossover style intake. 9.5:1 CR, hydraulic cam w/.510 lift. and unidentified exhaust (probably fairly quiet and restrictive). This is for a street driven car and I expect HP numbers around 450HP.
I have a couple of questions. I currently have a throttle body with dual 58mm bores. Someone told me that the GM 502 Ramjet uses a dual 52mm throttle body. The logic I guess is that driveability and tip in is better for the 52mm and the flow is adequate for a street car. Anyone have experience with this?
Also, if I replace the throttle body with the 52mm, what should I get. I have heard some bad things about BBK and Edelbrock makes them but I have not heard anything about them. Maybe get a GM 48mm and have it bored out?
Edit: The 502 Ramjet uses PN17113524 throttle body. This is listed as a replacement for a L98 motor. Wow, is it possible that the 502 uses 48mm throttle body?
I have a couple of questions. I currently have a throttle body with dual 58mm bores. Someone told me that the GM 502 Ramjet uses a dual 52mm throttle body. The logic I guess is that driveability and tip in is better for the 52mm and the flow is adequate for a street car. Anyone have experience with this?
Also, if I replace the throttle body with the 52mm, what should I get. I have heard some bad things about BBK and Edelbrock makes them but I have not heard anything about them. Maybe get a GM 48mm and have it bored out?
Edit: The 502 Ramjet uses PN17113524 throttle body. This is listed as a replacement for a L98 motor. Wow, is it possible that the 502 uses 48mm throttle body?
Last edited by BBShark; Feb 5, 2006 at 03:57 PM. Reason: Additional Info
