headers with stock mufflers?
Thread Starter
Racer
Joined: Jun 2004
Posts: 384
Likes: 0
From: freehold NJ
headers with stock mufflers?
I'm full of questions! My wife says I'm obsessed.
Anyway, I'm liking the Summit $87 headers. (I know they'll rust by tomorrow).
If I put those on will i notice a HP improvement w/o installing hi-flow mufflers??
Anyway, I'm liking the Summit $87 headers. (I know they'll rust by tomorrow).
If I put those on will i notice a HP improvement w/o installing hi-flow mufflers??
Melting Slicks
Joined: Feb 2004
Posts: 2,040
Likes: 105
From: State of Confusion!!!
2018 C2 of Year Winner
I'm not sure about the HP gains, but if you get them...send them out to be JET-HOT coated. They'll stay nice and it reduces the under hood temps. Shoot the works and have them done inside and out. You won't regret it.
Melting Slicks
Joined: Mar 2005
Posts: 2,838
Likes: 10
From: Austin TX
Agree with the above regarding the coatings. Also, I'd go ahead and some inexpensive performance mufflers. Check Jeg's or Summit for some turbos,..maybe the Dynomax..not too loud and flow great.
HP diff of stock vs. performance mufflers? 10-15 maybe?..just guessing.
HP diff of stock vs. performance mufflers? 10-15 maybe?..just guessing.
Thread Starter
Racer
Joined: Jun 2004
Posts: 384
Likes: 0
From: freehold NJ
Originally Posted by 73, Dark Blue 454
Agree with the above regarding the coatings. Also, I'd go ahead and some inexpensive performance mufflers. Check Jeg's or Summit for some turbos,..maybe the Dynomax..not too loud and flow great.
HP diff of stock vs. performance mufflers? 10-15 maybe?..just guessing.
HP diff of stock vs. performance mufflers? 10-15 maybe?..just guessing.
How much is it to have Jet hot coat them? I'm sure it's a better setup but keep in mind I'm a tight-wad.
Intermediate
Joined: May 2006
Posts: 32
Likes: 0
I tried the cheap Summit headers on my Chevy 350 truck before. I lost an obvious amount of power and they started to leak at the collector and block after 2 months. This forced me to upgrade to a quality header. Got tons of power out of it and no leaks after 4 years. Suggest you don't waste you money on cheap headers, you'll probably regret it.
Thread Starter
Racer
Joined: Jun 2004
Posts: 384
Likes: 0
From: freehold NJ
Originally Posted by intheclouds1977
I tried the cheap Summit headers on my Chevy 350 truck before. I lost an obvious amount of power and they started to leak at the collector and block after 2 months. This forced me to upgrade to a quality header. Got tons of power out of it and no leaks after 4 years. Suggest you don't waste you money on cheap headers, you'll probably regret it.
Race Director
Joined: Apr 1999
Posts: 11,520
Likes: 13
From: CORVETTE 77 385 C.I. TEXAS
Are you asking about C3 SB?
Get Dynomax Cerma-coat or the reg. Dynomax. Yes they will help w/ duals even w/ stock Corvette mufflers though low restriction mufflers like Dynomax rec.
http://www.corvettefaq.com/c3/ganeyexhaust.htm
Get Dynomax Cerma-coat or the reg. Dynomax. Yes they will help w/ duals even w/ stock Corvette mufflers though low restriction mufflers like Dynomax rec.
http://www.corvettefaq.com/c3/ganeyexhaust.htm
Last edited by Ganey; May 22, 2006 at 03:37 PM.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Expensive Corvettes Ever Sold on Bring A Trailer
Brett Foote
10 Things Every Corvette Owner Needs (2026 Edition)
Michael S. Palmer
8 Most "Only Corvette Owners Understand" Quirks and Problems
Pouria Savadkouei
10 Reasons the C6 Z06 is Still A Performance Benchmark After 20 Years
Joe Kucinski
How Much Horsepower Every Corvette Engine "LOST" in 1972
Joe Kucinski
Top 10 DOs and DON'Ts for Protecting Your Convertible Top!
Michael S. Palmer
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
Safety Car
Joined: May 2001
Posts: 3,758
Likes: 3
From: Surrey
What Ganey said. I fitted Dynomax ceramic coated Headers (from Summit) & they're great. No leaks (but I did use expensive copper gaskets) & they still look as good as the day I fitted them. Be sure to richen up the mixture (or at least check it) after fitting Headers.
Mine had a stock system when I bought it (except with a "test pipe" in place of the cat) & I noticed a big power hike after swapping the pipes for 2 1/2" duals. I later changed the stock mufflers to Monza glasspacks (no restriction of any consequence) & didn't feel any increase in power (maybe a dyno would show some). I later fitted Headers & didn't notice any low/mid range improvement, but the top end felt much, much better. With duals & stock manifolds there was definitely a restriction at high rpms which headers resolved (once I'd altered the jetting).
Something not mentioned is that the cabin temps on mine decreased after fitting ceramic coated headers & stainless pipes. That's lucky really, I haven't got any heat insulation under the carpets & have junked the aircon
Mine had a stock system when I bought it (except with a "test pipe" in place of the cat) & I noticed a big power hike after swapping the pipes for 2 1/2" duals. I later changed the stock mufflers to Monza glasspacks (no restriction of any consequence) & didn't feel any increase in power (maybe a dyno would show some). I later fitted Headers & didn't notice any low/mid range improvement, but the top end felt much, much better. With duals & stock manifolds there was definitely a restriction at high rpms which headers resolved (once I'd altered the jetting).
Something not mentioned is that the cabin temps on mine decreased after fitting ceramic coated headers & stainless pipes. That's lucky really, I haven't got any heat insulation under the carpets & have junked the aircon