NC8 - Chambered Exhaust

[Belair62]

I actually though I picked up a bit of power...at least it SOUNDS faster !!!!

[YENKO DEUCE REGISTRY]

Chris396;
Before you installed the chambered system, did you happen to try removing the over the axle pipes, tranverse and tailpipes and just running through the resonators?? I am considering doing this with my car to see if it wakes it up any. I don't think my car car would make it into the 13's right now, but I have to learn how to tune it correctly. Last night I barely got a chirp out of second gear, and I had it floored shifting at 5500 rpm!! Timing, jetting and valve lash?? It was a very depressing drive, my only consolation was that Pete's COPO and Neal's Yenko Nova's have run mid 13's - that's my goal.
M

[Edited by YENKO DEUCE REGISTRY (10-19-2001 at 08:10 AM).]

[Chris396]

No Marlin I didn't but that is a good idea.

[Chevy454]

OK, I got to looking at my notes inquiring about the chambered vs. transverse exhuast systems, and it looks like the in/out diameter of the chambered is 2". So, if Alan's exhuast is copied after the originals, it should probably be 2" as well.

Now, you mentioned looking for a 2.5" chambered system. The only chambered exhuast that I know of that big in/out is for the late model '93-'99 F-bodys, offered by Braxton .

The biggest problems with the original type exhuast is the usual bends and crimps in the head pipes and tail pipes, in both systems. So, I'm not sure how much difference their would be performance-wise between the two. Now, if you could swap out the crimped head/tail pipes with something with a mandrel bend in it, then that should yield a gain.

[JoeC]

I see some guys using an "X" pipe instead of a cross over pipe. It is supposed to have better scavenging effect and a little more HP then crossover pipe.

[Chevy454]

Check out these 2 articles (they are the same test, just different charts):

http://www.wauknet.com/douthitt/exhaust.htm

http://www.atlantabuick.com/Mufflers.htm

See, the proof is in the pudding! Er, uh, I mean ETs !

[NOTE: those links appear to be dead, so I am digging through my "favorites" trying to find some good links. Sit tight.]


[Edited by Chevy454 (10-19-2001 at 11:45 AM).]

A buddy of mine has a '70 LS6 Chevelle, that is an original car, but is not a numbers matching car. He had put a set of repro chambered pipes on the car, because he liked the sound. Another friend has the same car, but with 2 chamber Flowmasters, and his car was 3 tenths faster. I would go with a nice set of Flowmasters with and a cross over pipe if I was looking at 1/4 times. IMHO.