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how much hp am I losing?

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Old 03-01-2008, 10:09 PM
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Default how much hp am I losing?

I went with a 346 with a torquer 3 originally, made 432rwhp... pacesetter LTs, ORY and magnaflow catback... the ORY was 2.5 or 3" I believe.... it was a better setup than the TSP one, it looked equal length when they merged together for the Y...
I have a magnaflow bullet in the I pipe..

I went this route because I was tired of my neighbors bitchin' as well as cops giving me a hard time...

So now, unfortunately my 346 died and Im reusing my head and cam , but on a 402 and although may not make it at the moment, the future I am hoping to make over 500whp.... maybe will make 475-480whp at the moment... how much is my exhaust holding me back do you think? How restrictive is my setup for thta engine size..
Old 03-02-2008, 09:10 PM
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Nowww
Old 03-02-2008, 10:50 PM
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what heads are they?
Old 03-03-2008, 03:23 AM
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Theyre PRC 5.3 stage 2.5 heads.

theyre a smaller combustion chamber head with 862 castings I believe. Im oretty damn sure the ports and valves are larger than stocker 241 casting heads... and they have some beefy valvesprings..




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