Anyone done a 4 inch cutout over a 3 inch?
04-15-2006, 09:12 PM
#1
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Anyone done a 4 inch cutout over a 3 inch? Well, I just installed a QTP ory on my car. I still have a bit of adjusting to do clearance wise, but otherwise a pretty good piece. I especially like the flowmaster merge collector it has.
The outlet of the flowmaster merge is a 4 inch diameter, and I am wondering if a 4 inch QTEC would be beneficial over the 3 inch I currently have? Any opinions on this?
Also, FWIW I fired up the car with an open y pipe. Holy **** that thing is loud, and it sounds mean. It is definitely louder than my jet-hot y-pipe was when it was wide open.
The outlet of the flowmaster merge is a 4 inch diameter, and I am wondering if a 4 inch QTEC would be beneficial over the 3 inch I currently have? Any opinions on this?
Also, FWIW I fired up the car with an open y pipe. Holy **** that thing is loud, and it sounds mean. It is definitely louder than my jet-hot y-pipe was when it was wide open.
Last edited by bowtieman81; 04-15-2006 at 09:21 PM.
04-16-2006, 03:36 PM
#3
I just had one of our cars on East Sides dyno yesturday. On a 402 with a 4" cutout, the engine made a 10 hp & 18 tq difference from open to closed. This isn't just peak #'s. There was a big difference across the board.
04-17-2006, 12:07 AM
#4
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Originally Posted by Firehawk441
I just had one of our cars on East Sides dyno yesturday. On a 402 with a 4" cutout, the engine made a 10 hp & 18 tq difference from open to closed. This isn't just peak #'s. There was a big difference across the board.
How much power was it making?
