Dynomax Exhaust
Thread Starter
Junior Member
Joined: Sep 2000
Posts: 20
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From: TX
Dynomax Exhaust
Well the exhuast is installed and run in. The car sounds great. Mellow rumble to about 3000rpm, gets alil "tinny" above but it does sound better and more like a 8 in the morning and with a light foot. BUT, it feels like the power it had went away. Doesn't feel as quick... I am thinking back pressure? or, lack there of now? did note tho the gas mileage went up... thats a bonus. anyone else notice this loss of pep when they did there exhaust? not a big deal as i got parts to put on to fill the pipes but man.... i'm not ready to do that yet.....
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David
91 Firebird
3.1L MPFI
Dynomax exhaust, cold air, 8mm wires, splitfires, shift kit, B&M Shifter.
On the table waiting to go in:
Ported/polished iron heads, 1.6:1 rockers, Lightly ported/Gasket matched Intake. Ported/Polished TB, Compucam 2030, 5" tach, duel pod w/oil temp, tranny temp gauges. Hood pod w/Fuel pressure, NOS pressure.
Coming Soon:
FastChip, 275 rears, 235 fronts, Ram air hood, suspension mods.
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David
91 Firebird
3.1L MPFI
Dynomax exhaust, cold air, 8mm wires, splitfires, shift kit, B&M Shifter.
On the table waiting to go in:
Ported/polished iron heads, 1.6:1 rockers, Lightly ported/Gasket matched Intake. Ported/Polished TB, Compucam 2030, 5" tach, duel pod w/oil temp, tranny temp gauges. Hood pod w/Fuel pressure, NOS pressure.
Coming Soon:
FastChip, 275 rears, 235 fronts, Ram air hood, suspension mods.
Supreme Member
Joined: Mar 2000
Posts: 1,777
Likes: 0
From: First one out of liberty city, burn it to the ground
FYI:
Backpressure has gone down, thats why it feels slower, cuz torque pulls u off the line, and less backpressure means less torque...ALSO...Less Backpressure HURTS your gas mileage so ur MPG actually went down...
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Backpressure has gone down, thats why it feels slower, cuz torque pulls u off the line, and less backpressure means less torque...ALSO...Less Backpressure HURTS your gas mileage so ur MPG actually went down...
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Supreme Member
Joined: Jul 1999
Posts: 1,218
Likes: 1
From: Orlando,Fl, USA
When I had mine installed I also got a new converter, HIGH Flow put on. It sounded better and when I took it to the track the numbers were better in the 330 and 1/4. I also thoughtt on the highway I was getting slight better miles as I cruised around at 70ish
Supreme Member
Joined: Mar 2000
Posts: 13,414
Likes: 6
From: Central NJ, USA
Car: 1986 Firebird
Engine: 2.8 V6
Transmission: 700R4
Congrats on the mod, '91! Keep us posted on those other goodies when they go in.
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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards
Junior Member
Joined: Oct 2000
Posts: 5
Likes: 0
From: ohio
I've always heard/read you can never relieve enough backpressure from a Camaro cause of the poor exhaust design. Also, two outlets on the same side of your muffler are better than anything. I have a Dynomax on my 87 2.8, Sounds much better, I hate that V-6 Twang.
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