turbo mufflers

[drsantos]

Has anyone used the Turbo mufflers part number 603-870 from madvet.com, are they louder than stock?

[waterboy1976]

sorry flowmaster 40's here

[brusso]

Originally Posted by waterboy1976

sorry flowmaster 40's here

Ditto

I had them when I first bought the car. Then I went Flowmaster 40s. I liked the Flowmaster sound better- meaner, and definitely louder though. I've got hooker headers and sidepipes now with the spiral turbo mufflers. Haven't heard them yet- very anxious :-) Car's been out of service 2 months now, should be up in two weeks or so...

Thrush turbos suck big time

[drsantos]

Went with flowmaster Delta 40's, getting alot of popping on deceleration however.

Thanks

Originally Posted by drsantos

Went with flowmaster Delta 40's, getting alot of popping on deceleration however.

Thanks

Isn't that a jetting problem?

the popping is fuel burning in the mufflers. It could be that the 40's offer such a better flow that combined with the cam overlap, unburned fuel is getting sucked into the exhaust where it explodes fromthe heat.

[vette333]

I have an 81 Vette with a stock exhaust system and a "hollowed" replacement cat. converter with 40's. They 40's sound real nice. I had the thrush turbos and they sounded good too but I like the 40's better.

I am looking to replace the current exhaust manifolds with a good set of headers and complete dual system, does anyone have any suggestions on where I can find bolt on replacements or maybe an entire kit/system? I don't want to modify the car to accomodate the duals but i would prefer a true dual system.
The car has stock heads and cam with an Edelbrock 650. ECM system is disconnected and the distributor has been changed to a vacuum type from a 1979.

Thanks,
Vette333

[Bob Chadwick]

Originally Posted by drsantos

Went with flowmaster Delta 40's, getting alot of popping on deceleration however.

Thanks

Went away with an H pipe on the Delta 50's.

[Bob Chadwick]

Originally Posted by vette333

does anyone have any suggestions on where I can find bolt on replacements or maybe an entire kit/system?

Take a look in the catalogues. I think I was looking in the Corvette America catalogue when I changed mine over. I ended up going with a custom set up with Delta 50's, 2 1/4" pipe and dual cats.

There are a lot of dual exhaust kits, though because of emmision requirements they are all stated to be for off-road use. Some bolt to the stock ram horns but, if I recall correctly, most are set up for headers.

I added the Dynomax ceramic coated to mine. An easy install.

Does your car have the trans crossmember with the dual cutouts. If not, a search here will find how people have gotten around this but it is a complication.

[vette333]

Thanks for the response. I've looked at the Jeg's and Summit and could not find a good match for the 81.
I'll have to check the Trans cross member to see if i have the cut-outs.

Thanks,
Vette333

[Crab]

Originally Posted by vette333

Thanks for the response. I've looked at the Jeg's and Summit and could not find a good match for the 81.
I'll have to check the Trans cross member to see if i have the cut-outs.

Thanks,
Vette333

Check out Mid America, they have a bolt on True Dual system that brings the left side over to run along side the right exaust. They also offer them in stainless steel.

[vette333]

Thanks for the information, I'll look them up.

Regards,
Vette333

[vette333]

Originally Posted by 80crabvette

Check out Mid America, they have a bolt on True Dual system that brings the left side over to run along side the right exaust. They also offer them in stainless steel.

80 Crabvette:
I just ordered my dual pipe from Mid-America. Did you change your stock exhaust manifolds over to full length headers? If yes, what brand/type headers?

Thanks again,
Vette333