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#21
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If it's the knock off Flowmasters that you're worried about, I have a pair of "real" 3 inch Flowmaster Super 40's in like new condition I ran on my car for a while. They are for A-body offset inlet offset outlet exhaust system setups.
I'd gladly sell them to get them out of my way. |
#22
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#23
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Triple Black 1971 GTO |
#24
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I've had 3" pipes on mine TA with 40's for 25 yrs....thought the 3" would soften the cam sound so I could kinda sneak up on folks......NOPE. NO sneaking with 11:1 400 RAIV cam...BUT it is not obnoxious either.
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#25
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With the same pipes, I bet you make more power with 2.5" than with 3" FlowMasters.
My '67 Firebird gained nearly a tenth and 1.1mph when I swapped the 3" FM for 3" AP/Goerlichs
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'73 T/A (clone). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 315rwhp/385rwtq on 87 octane. 13.12 @103.2, 1.91 60'. '67 Firebird [sold], ; 11.27 @ 119.61, 7.167 @ 96.07, with UD 280/280 (108LSA/ 109 ICL)solid cam. [1.537, 7.233 @93.61, 11.46 @ 115.4 w/ old UD 288/296 108 hydraulic cam] Feb '05 HPP, home-ported "16" D-ports, dished pistons (pump gas only), 3.42 gears, 275/60 DR's, 750DP, T2, full exhaust My webpage http://lnlpd.com/home |
#26
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Back to the topic of deleting the crossover (either H-pipe or X-pipe) in the pursuit of sound, the Engine Masters show revealed that having a crossover absolutely produces more power across most of the rev range (idle to ~5k, IIRC). I'd be pretty hard pressed to take the H-pipe out if you already have one installed. I'd just get rowdier mufflers and keep the H-pipe if you want it to be more aggressive.
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1966 Pontiac GTO (restoration thread) 1998 BMW 328is (track rat) 2023 Subaru Crosstrek Limited (daily) View my photos: Caught in the Wild |
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