Sugested exhaust diameter for bridgeported 12a
05-28-10, 04:45 PM
#1
Sugested exhaust diameter for bridgeported 12a
I looked and couldn't find an answer so here goes..... I recently got a 12a bridgeported engine. 
The racing beat header I got with it collects into just a 2 inch diameter pipe..... which I odviously know is too small for the whole exhaust. And I know for a stock port 2.25 is sugested but what about a bridgeport? Thanks guys!
The racing beat header I got with it collects into just a 2 inch diameter pipe..... which I odviously know is too small for the whole exhaust. And I know for a stock port 2.25 is sugested but what about a bridgeport? Thanks guys!
05-28-10, 04:59 PM
#2
Two 2" O.D. pipes merging into a 2.5" pipe for street. Merging into a 3" pipe for off road.
The relatively smaller 2" O.D. pipes will increase velocity over the 'you gotta have huge primaries in a bridgey, 2.25" OD at a minimum' some will say. Smaller diameter = more velocity and more scavenging.
The relatively smaller 2" O.D. pipes will increase velocity over the 'you gotta have huge primaries in a bridgey, 2.25" OD at a minimum' some will say. Smaller diameter = more velocity and more scavenging.
sorry.
05-29-10, 12:33 AM
#4
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He's saying that your primaries are smaller than what's sometimes recommended for a bridgeport. Meh, I'd stick with 2" primaries. For the street, I'd say collect into 2.5".
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