true duals
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by 78 anny vette
I`m having true duals put on my 78 l48. Will i need heat sheilds under the floor pan. I don`t have headers yet.
with or with out cats? you may want them with cats...no cats no shields necessary
Le Mans Master
Joined: Oct 2004
Posts: 5,269
Likes: 54
From: Orlando Florida
St. Jude Donor '05
well...... it's getting pretty hot at your feet..... at least that's my experience....
BTW, I don't have A/C and I live in FL.... may not be that big of a problem for you, depends where you live...
BTW, I don't have A/C and I live in FL.... may not be that big of a problem for you, depends where you live...
Melting Slicks
Joined: Jan 2005
Posts: 3,028
Likes: 0
From: Madison Ms
!!
It's a big difference if your dropping the cats and going "true" dual exhaust at the same time! You will be suprised..........
EDIT: FROM A POWER STANDPOINT........
EDIT: FROM A POWER STANDPOINT........
Last edited by MsVetteMan; May 11, 2005 at 11:46 PM.
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by 78 anny vette
thanks for the help. No cats and I`m in the land of 10,000 lakes 
i don't think you have an issue, however any anything to keep the heat out is a good idea.
Melting Slicks
Joined: Apr 2001
Posts: 2,119
Likes: 213
From: Pittsburgh PA
Originally Posted by 78 anny vette
I`m having true duals put on my 78 l48. Will i need heat sheilds under the floor pan. I don`t have headers yet.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski
5 Reasons to Upgrade to an LS6-Powered Corvette; 5 Reasons to Stay LT2
Michael S. Palmer
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by mvftw
Have them install an H-Pipe also, plus you should go with 2 1/4" not 2 1/2"... 
did you mean this the other way around? i recommend 2 1/2" for sure
Race Director
Joined: Sep 2004
Posts: 11,874
Likes: 263
From: Arlington Va Current ride 04 vert, previous vettes: 69 vert, 77 resto mod
Originally Posted by mvftw
Rule-of-Thumb is over 300hp go with 2 1/2". A stock L48 or L82 will preform better with 2 1/4" duals...
MVFTW...ok i see where you are going....
78 anny vette....make up your mind now on what kind of power you want before you spend $$$ on the exhaust....
Race Director
Joined: Oct 2000
Posts: 11,891
Likes: 3
From: Kansas City, MO ...I'd like to go fishing and catch a fishstick. That'd be convenient. - Mitch Hedberg
I've got headers and dual exhaust. Driving around under 50 mph, no heat in the footwells. 50-65 mph, starts getting warm. Anything over 65 mph and my feet start to cook.
I'm gonna fab up some heat shields. I'm going to cut some long sheet metal, then bend a radius into it. Then I'll cut out the tabs and tack weld it to the exhaust pipes.
I'm gonna fab up some heat shields. I'm going to cut some long sheet metal, then bend a radius into it. Then I'll cut out the tabs and tack weld it to the exhaust pipes.
Melting Slicks
Joined: Aug 2004
Posts: 2,165
Likes: 950
From: Keizer Oregon
Originally Posted by mvftw
Rule-of-Thumb is over 300hp go with 2 1/2". A stock L48 or L82 will preform better with 2 1/4" duals...
If you install 2.25 and then later decide to upgrade the power, you have to buy an entirely new exhaust system.
[/IMG] 
[/IMG] 
[/IMG]