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#1
01-22-2020, 11:01 PM
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race mufflers
I picked up a set of race mufflers. They're the cheep ones made like glass packs. They fit my 3- 1/2" headers and are 9" long with rows of holes on the inside. The holes are punched from the back, so the inside is rough and jagged. Are these going to kill my performance? I'm just wanting to tone down the exhaust a little. Thanks
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#2
01-23-2020, 07:15 AM
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They act like a Cheese grader to Exh flow for the most part!
That type of muffler needs a much bigger diameter then your collector to minimize that effect.
__________________
Wernher Von Braun warned before his retirement from NASA back in 1972, that the next world war would be against the ETs! And he was not talking about 1/8 or 1/4 mile ETs! 1) 1940s 100% silver 4 cup tea server set. Two dry rotted 14 x 10 Micky Thompson slicks. 1) un-mailed in gift coupon from a 1972 box of corn flakes. Two pairs of brown leather flip flops, never seen more then 2 mph. Education is what your left with once you forget things! |
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#3
01-23-2020, 08:05 AM
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This will depend on the combo. I have run that type muffler in the past with very little reduction in ET. This was on a 11 second car. X pipe will also help quiet it down.
__________________
66 GTO Nostalgia Super Stock/Street Legal Car 421 CID, stock block, Wenzler Intake, 2- Carter 750 AFB's, 3.90 Gears, Full Factory Interior, Full Exhaust, Stock Suspension 3750LBS 9.77@136.99 Multiple NSCA/NMCA World Champion 66 GTO 389 3x2, 4 speed, 4.33 gear, Montero Red 33K original Miles 67 GTO 2dr Post, 428, Tri Power, 3.55 Gears 80 Trans Am Black SE Y84 W72 WS6 |
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#4
01-23-2020, 02:33 PM
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The combo is a 461 solid roller, 330 e-heads, with a 1050 Domanator . The exhaust is Super Comps headers 12" of 3 1/2' pipe mufflers and turn downs. Race only. I'm trying to not have that sharp tone that hurts the ears and save what hearing I have left. Thanks
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#5
01-23-2020, 03:18 PM
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It depends on a lot of factors, but you may go faster. When NHRA started requiring mufflers in Super Gas(years ago, sometime in the 90's), we actually picked up, though we had the same concerns as you initially that it would cost power. Experiment with different length pipes, merge collectors, etc. You may go faster and quieter.
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'65 Tempest 467 3650# 11.30@120.31 |
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