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#21
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Not sure. We tried a system from someone else and it was a major job installing the it, nothing fit. Torque Technologies was great! Pypes used to be good but have taken a turn for the worse.
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#22
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Ramair has several exhaust system, But I don't see the splitters
https://www.ramairrestoration.com/ca...t=11&q=exhaust I have their 3 inch pipes from the Ram Air Manifolds into an X pipe and then currently dumping behind the rear wheels. Ran out of time to have the tail pipes out the back car but should that done in the next few months. Video of exhaust under the car https://www.youtube.com/watch?v=m95cYNyy-y0
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74 Formula Below motor destroyed fall of 2023 469, 6X-4's, 72 Intake, Ramair Manifolds. 3 inch exhaust with x-pipe Custom Roller Cam, 1.52 Roller Rockers Quadrajet done by Cliff 3:42 gears 12.061 @ 110.74 12.092 @ 112.43 12.128 @ 111.71 461 stroker Edelbrock 87 cc dport heads Performer RPM Same Ram Air manifolds, and quadrajet 75 Formula 400 / 4-SPD matching numbers Last edited by form74; 03-30-2018 at 09:54 PM. |
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#23
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I have a Pypes 3" system on my wife's 71 T/A. Fit very well with Doug's headers. I added flex segments to reduce vibration.. Also used V-band clamps instead of collector reducers. If you could find 3 inch splitters I'm sure they could be made to work with that system. I used the 3" hockey stick tips like original to the 71.
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 6.0L LS single turbo, 8.85 @155 mph 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.03@171 mph 2009 G8 GT |
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#24
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#25
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#26
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466 Mike Voycey shortblock, 310cfm SD KRE heads, SD "OF 2.0 cam", torker 2,generic one inch open spacer 373 gears 3200 Continental Convertor best et 10.679/127.5/1.533 60ft 308 gears best et 10.76/125.64/1.5471 |
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#27
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Thanks
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 6.0L LS single turbo, 8.85 @155 mph 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.03@171 mph 2009 G8 GT |
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#28
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Does look good.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#29
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Wish someone would make a good flowing 3" transverse style muffler.
ErikW - that system looks great!
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---------------------------- '72 Formula 400 Lucerne Blue, Blue Deluxe interior - My first car! '73 Firebird 350/4-speed Black on Black, mix & match. |
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#30
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Skip, rear brakes are a combination of late second gen rear rotors, front S-10, or mid-size GM calipers, and brackets I bought off of eBay. Work great, just no parking brake. Very low budget, calipers are $17 from AutoZone, brackets we're like $30 and rotors were $28 ea.
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1964 GTO 501, Edelbrock Heads NA, 3460 lbs. 9.76 @ 137mph 1971 Trans Am Lucy Blue, 11.56 @ 115 1966 LeMans. 6.0L LS single turbo, 8.85 @155 mph 1976 Trans Am twin turbo 462, SD Edelbrock heads 8.03@171 mph 2009 G8 GT |
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#31
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Got you. My Camaro project 79-81 rear disc and brackets w/ just "plain" Malibu calipers. So similar.
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Skip Fix 1978 Trans Am original owner 10.99 @ 124 pump gas 455 E heads, NO Bird ever! 1981 Black SE Trans Am stockish 6X 400ci, turbo 301 on a stand 1965 GTO 4 barrel 3 speed project 2004 GTO Pulse Red stock motor computer tune [email protected] 1964 Impala SS 409/470ci 600 HP stroker project 1979 Camaro IAII Edelbrock head 500" 695 HP 10.33@132 3595lbs 1964 Corvette Coupe 327 4 speed |
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#32
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,[email protected]@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, [email protected] [email protected] M/T 275/60 ET SS Drag Radial 2024(Pontiac 505) 1.25 60 ft, [email protected], [email protected].... 275/60 Radial Pro's |
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#33
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This is interesting reading. My 469 powered '69 convertible has run a best of 11.4 @122 mph. This was on open headers and with a 1050 dominator. A few weekends ago whilst competing in the UK street weekend i had to fit an exhaust. I have a 2.25" Borla system that is regularly on and off the car depending on what im doing with the car. I lost a second and 8 mph on the quarter. This is also with a 950 HP carb. I have been pondering the loss and was told it was the exhaust to which several people have said that it wasn't the reason. This weekend I'm doing dragstalgia on open headers so will see.
If this proves to be the problem does anybody make a 3" kit for a '69 'vert? Last edited by wakesupremo; 07-03-2024 at 01:35 AM. Reason: I missed |
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#34
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That's hillarious people telling you a tiny 2.25" exhaust isn't slowing down a car that normally runs mid 11's @ 122 without it.
![]() Something making that kind of power for sure needs a pretty good size pipe on it if you want to run through the mufflers and not lose too much. I typically run 3" on stuff like that, and then use electric cutouts if I want the headers open for any reason. Then you won't be taking the exhaust on and off all the time, that gets old. |
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#35
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I’ve been 9.40’s through 3” exhaust,depends on the whole combo!
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Darby 74 Grandville 2Dr 455 c.i 4550# 2011 1.60 60 ft,[email protected]@117.74 2017, 74 firebird -3600 lbs (all bests) 1.33 60 ft, [email protected] [email protected] M/T 275/60 ET SS Drag Radial 2024(Pontiac 505) 1.25 60 ft, [email protected], [email protected].... 275/60 Radial Pro's |
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#36
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You can certainly run quick with small exhaust, it's just a matter of making more power with the engine. Look how quick the fast guys are going with 2 1/2" exhaust.
What isn't realistic is running an et and mph such as the op with open headers and then expecting to do the same when slapping on a 2 1/4" exhaust system. That's just not goona happen. You're going to have to find missing hp somewhere else to make up for it, or just put an exhaust system on the car that's more deserving to start with and have an easier time with it. |
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#37
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Thanks for the replys again, but, My question was , does anyone make a good fitting 3" system for a '69 firebird 'vert?
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#38
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Just installing better mufflers can make a big change to the AFR, requiring a change to the tune. For pretty much any 3" system to fit GOOD, it will require an installer with the skills and equipment to make adjustments.
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'73 T/A (sold). Low budget stock headed 8.3:1 455, 222/242 116lsa .443/.435 cam. FAST Sportsman EFI, 317rwhp/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 |
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#39
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Quote:
![]() Idle clip while tuning https://youtu.be/-XGWLuEwyso?si=2x5QzMZohkvFneft
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James 1970 Trans Am Spotts Built 484" IA2, Highports, EFI Northwind, E85 Holley Terminator X sequential EFI fabrication and suspension by https://www.funkhouserracecars.com/ |
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