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Old 10-29-2019, 02:58 PM
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Jim Moshier Jim Moshier is offline
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Default 3" Super Turbos

I have always run turbos mufflers as opposed to the straight thru design and was looking at the 3" and noticed they DynoMax have a center/center and an offset/center ......knowing the design of the ST as it has 2 S-curves in their design ....how does the center/center or offset/center muffler design look?

I would think there would be a lot of cross-flow in the muffler and not very smooth like in the offset/offset mufflers. Going into an A-body the offset/offset works best in these cars/ What's your science behind it or opinion to support it.
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Old 10-29-2019, 04:13 PM
70GS455 70GS455 is offline
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Any time there is a tube in the center of the body, the exhaust has to flow around the tube, or in other words, in the space between the tube and the body floor/ceiling. Unless the case is much larger, this would not flow as well as side/side.

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Old 10-29-2019, 04:15 PM
70GS455 70GS455 is offline
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Also with the ST 3" mufflers, there are 2 case sizes. In the smaller case, the internal tubes neck down to 2.5". In the larger case, they stay 3"

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Old 10-29-2019, 04:43 PM
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Jim Moshier Jim Moshier is offline
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70GS, Yes, I see that there is a 3" muffler with a 20" case that has an offset/center configuration #17793 and a 16" case with an offset/offset both 11" wide and 5.5" high # 17792. I agree the offset/center would not flow as well.

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Jim Moshier

1971 Grand Prix 462ci SD Performance 6x heads
1962 Catalina 389
1968 Firebird 400-455 I haven't decided

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Last edited by Jim Moshier; 10-29-2019 at 04:56 PM.
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Old 12-18-2019, 09:18 PM
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Look up Spangenberg's 8 second Impala street car on youtube. He's running those Dynomax Super Turbo 3 inch mufflers. I would say they flow pretty good.

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