KZad

There is a small possibility that I will put a 350 into my formula this winter. How big of an advantage would it be to put on True Dual EXhaust??? Will it fit, is there room for it?? Didn't the 91-92 Birds with 350's come with stock dual exhaust? How much would the dual exhaust help me now, with my 305 TBI??? Very interested, and possibly dreaming, but i still would like to know.

KZ

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1988 Firebird Formula 305 TBI, T-Tops, RED.
Of course ... 5-Speed

Tas

Its an expensive pain in the ****. The 350 cars can have dual cats but never came with dual exaust.

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-Tas
'89 Formula WS-6

305, TBI, 700R4, P.A.W. 14x3 open element with K&N, Milodon 160* thermo, functional Formula hood, cross-flow Flowmaster, '99z28 rear pipes and tips, Hooker 1-5/8" 50 state legal headers, Dynomax 3" I pipe (PN 44063 and 43248)
Super GRK_Taz World
F-Body Dual Exaust
EFI & Intake Options

IROCZTWENTYGR8

iTrader: (1)

Just do a search and u will find all kinds of stuff about this.

cort351w

look at my reply on the post dual exhaust. It is fairly recent, I think that's the whole title. I outline what I'm doing as soon as I get these headers on. Can't promise for sure it will work because I haven't done it. I did plan it out and went through 10 or fifteen different ideas, before settling on this one. I will have stock ground clearance or better. I will have a crossover. I will be able to put SFCs in just fine. Check it out. It's long though--I detailed the whole thing.

twistedwedge

Not really, my buddy paid 150 for his first setup (labor+materials, no muffs) it was 2 1/2 inch routed in stock location. Car picked up 4 tenths in the 1/8 mile. (8.17 to 7.73) this was with shorty headers also. Most people dont realize that the low point of any exhaust that has full length headers is the collector flanges. just my .02

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1987 GTA, 355 inch motor, carbureted, TFS twisted wedge heads (non G2), TH400 w/brake, 11.3:1, Lunati hydraulic roller .510/.525 lift 232/242 duration @.050 on a 112* lobe seperation, Hooker super comps, Dual 3" flowmaster 2-chamber exhaust with NO tailpipes, 98 Z-28 wheels, Strange 12-bolt rear w/4.30 gears, 33 spline axles and a spool.

Best ET on street tires, m6, and 10 bolt w/4.56 gears: 12.46@115.1
3515 lbs race weight

Drive it like you stole it!!

Soon to be mods: 10 pt cage, Torque arm, NOS

Hopin for 10's...

Tas

That the most cost effective way to run duals, but that way isn't true duals. If u want true duals like Mustangs and Corvettes, then it will be an expensive pain in the ****, like I said.

twistedwedge

if there is TWO seperate pipes how can it not be true duals?

maybe the exhaust on my car is probably what you consider true duals: Two pipes, one on each side of the driveshaft, 3" each. Oh yeah, it only cost me 175...for 3". You just gotta find someone that is willing to do it.

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1987 GTA, 355 inch motor, carbureted, TFS twisted wedge heads (non G2), TH400 w/brake, 11.3:1, Lunati hydraulic roller .510/.525 lift 232/242 duration @.050 on a 112* lobe seperation, Hooker super comps, Dual 3" flowmaster 2-chamber exhaust with NO tailpipes, 98 Z-28 wheels, Strange 12-bolt rear w/4.30 gears, 33 spline axles and a spool.

Best ET on street tires, m6, and 10 bolt w/4.56 gears: 12.46@115.1
3515 lbs race weight

Drive it like you stole it!!

Soon to be mods: 10 pt cage, Torque arm, NOS

Hopin for 10's...

[This message has been edited by twistedwedge (edited December 11, 2001).]

LilJayV10

iTrader: (5)

I am planning on putting dual exhaust on my car, 406 with hooker super comps, i saw in person a 89 formula 350TPI 5 speed car(yes it was a custom job)at bowling green kentucky earlier this year at the EFI shoot out. it had super comp long tubes, with 3inch true dual exhaust all the way back, and 2 chamber flowmasters under the rear seats, and has a crossover tube. it looked great, and the ground clearence looked just fine, it didnt hang down. it ran straight back along the driveshaft and the mufflers hung under the rear seats, he said he beat the rear seats up about 2 inches and thats it. it sounded great, you cant get that sound out of single exhaust. IMO, if you can find a shop that will do it, its worth it. thats just my .02
lil jay

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Wide Open Till You See *** ...Then Brake

89 T/A Clone
406 in progress
TH700R4 3.42 Posi

twistedwedge

Hey man, are you referring to Brandon Aders? Red Formula 350 TPI car? The guy at Total Engine Airflow booth. Im pretty good friends with him. His car runs damn good too. 13.oh's at 108. Only work done is ported STOCK heads and intake runners.
Fastest N/A TPI car Ive heard of to date. He definitely can go 12's, but doesnt want to break the 'ol 5spd.

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1987 GTA, 355 inch motor, carbureted, TFS twisted wedge heads (non G2), TH400 w/brake, 11.3:1, Lunati hydraulic roller .510/.525 lift 232/242 duration @.050 on a 112* lobe seperation, Hooker super comps, Dual 3" flowmaster 2-chamber exhaust with NO tailpipes, 98 Z-28 wheels, Strange 12-bolt rear w/4.30 gears, 33 spline axles and a spool.

Best ET on street tires, m6, and 10 bolt w/4.56 gears: 12.46@115.1
3515 lbs race weight

Drive it like you stole it!!

Soon to be mods: 10 pt cage, Torque arm, NOS

Hopin for 10's...