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| DaleD | Early C4 exhaust | ||
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Senior Guru
 
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I was thinking of putting headers on my car in the spring, it's an 87. I have a Magnaflow catback and was wondering, is it worth fussing with putting an LT car style exhaust on it, (a true dual).
Or, for a car that's stock, would it be just as good to buy a high flow 3" cat? |
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Posted on: 2009/12/16 1:04
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| 1Fast04Vert | Re: Early C4 exhaust | ||
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Elite Guru
 
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Long tube headers and true dual exhaust will give you some noticeable gains. Shorty headers woulld be just a waste of money (IMO).
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Posted on: 2009/12/16 3:18
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2004 Vert. 475hp. Built by Vengeance Racing |
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| DaleD | Re: Early C4 exhaust | ||
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Senior Guru
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I know to go with long tube. I'm just not sure if a single 3" pipe with a high flow cat would be as good as an LT1 true dual.
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Posted on: 2009/12/16 4:04
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Whenever someone says "I'm not book smart, but I'm street smart", all I hear is "I'm not real smart, but I'm imaginary smart". |
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| CentralCoaster | Re: Early C4 exhaust | ||
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Dual 2.75" is 70% bigger than a single 3"
Dual 2.5" is 40% bigger than a single 3". I guess the better question, is if you will even benefit from the extra area. There's a point of diminishing returns with exhaust sizing. |
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Posted on: 2009/12/16 7:35
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| mechguy79 | Re: Early C4 exhaust | ||
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I thought the factory LT1 exhaust is dual 2 1/4in?
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Posted on: 2009/12/16 11:35
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| bogus | Re: Early C4 exhaust | ||
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Grand Imperial Pooh-Bah
 
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2.5"
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Posted on: 2009/12/16 11:39
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| Painterman | Re: Early C4 exhaust | ||
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I put an LT4 exhaust on my 86 and love it. It is 2&3/4 inches. I also did away with the precats.
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Posted on: 2009/12/16 11:53
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| LT4BUD | Re: Early C4 exhaust | ||
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Quote:
You forgot dual 3"...TWICE as big...it is what I have!!!! On Dales car I wouldn't recommend 3"...stay with 2-3/4 Probably no benefit in 3" plus I think the 3" leads to higher interior resonance when cruising |
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Posted on: 2009/12/16 14:05
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| DaleD | Re: Early C4 exhaust | ||
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Senior Guru
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Quote:
Exactly. I guess I didn't word it very well, but that's the point of my question. Does anyone have a feel for the point of diminishing return? It may just be that the 3" single tube flows enough for my car? Or, would the dual 2.75" be a noticable difference? |
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Posted on: 2009/12/16 14:15
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| 1Fast04Vert | Re: Early C4 exhaust | ||
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Elite Guru
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Quote:
It is 2.75" on my 95. I think the 92-93s are 2.5" and not sure about the 94s. |
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Posted on: 2009/12/16 14:29
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| CentralCoaster | Re: Early C4 exhaust | ||
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Senior Guru
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IMO, there's no need for anything larger than dual 2.5s with a 350 unless you're making power at 7K.
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Posted on: 2009/12/17 4:46
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| bogus | Re: Early C4 exhaust | ||
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Grand Imperial Pooh-Bah
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Dale,
Just track down a stock LT1 exhaust system... There is a Corvette recycler in Indiana, Tiber(sp?). Or even calling Vette2vette. The thing is, stock LT1 is a throwaway piece. Hell, wait until the next Corvettes at Carlisle and when they are doing exhaust installs, see if you can snag up on one! You will need brackets and they are cheap enough. There is a front bracket, two middle brackets and two muffler hangers. Easy. Get the LTs and have them adapted with bullet cats to the stock LT1 exhaust. |
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Posted on: 2009/12/17 6:53
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The single biggest problem with communication is the illusion that it has taken place. - George Bernard Shaw Education is the best tool to overcome irrational fear. - me |
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| mikeV | Re: Early C4 exhaust | ||
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Guru Newb
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Quote:
The installers at Carlisle wont touch anything from the C4 Gen. Only C5 & C6. Redheaded stepchildren again.... |
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Posted on: 2009/12/17 22:14
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| LT4BUD | Re: Early C4 exhaust | ||
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Guru
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Quote:
Absolutely true...no C4 exhaust installation at Carlisle. |
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Posted on: 2009/12/18 3:50
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