exhaust tube sizes
 

the stock size is 2.75 inches isnt it? how much power are you guys running before you up to 3 inches? i want to add headers but i dont really want to put on mufflers (although i may put in an X pipe) i will be adding a very healthy cam along with the headres and a bunch of other goodies and im curious if i can just leave the resonator and 2.75 inch pipe and replace the factory H pipe with an X pipe if i will have enough backpressure.

exhaust size
 

Ive been told that you shouldnt go to 3 inch untill your up around 500 hsp. Im up around 480 right now running hookers and 3 inch pipes back to flowmasters and its pretty loud, I dont think I would run straight 3 inch pipes with out mufflers ,especially if you like your neighbors

Be careful here... I used to have a Mustang GT with stock 2.25" (Ithink0 pipes. I "upgraded" to a Flowmaster cat back system that was 2.5" and lost a LOT of low end torque... Unless you have a heavily modified motor, I would stay with the stock size pipes.

i am staying with 2.75 pipes either way. i am just curious if its going to give me enough back pressure

how many other ppl are running high hp with low restriction and havent changed the size of the pipes? i plan to run a little over 400 rearwheel horsepower when my motor is rebuilt next year

A 2 1/2" pipe will flow ~560cfm, so duals will flow ~1,120cfm. Also the system should flow about 2.2cfm/1chp.

So a dual 2 1/2" system should flow to ~510chp before you start to lose power to a restrictive exhaust system. Similarly, a 3" dual system should flow to over 730chp.

so you thnk my stock 2.75 with no mufflers or cats and headers will be enough flow and have enough back pressure for about 400rwhp? i will have a resonator and a X pipe

That will be enough. Although, why not lose the resenator and put some decent mufflers on it?

i really dont like the way mufflers look under there and i have yet to find a set that i like the sound as much as my elims

You ever considered chambered exhaust pipes?

im not quite sure what those are. please fill me in. ive heard flowmaster. dont like them on vetts. i really dont care for corsa. magnaflow is ok i guess but doesnt sound as good as mine. not putting these down at all. if you have them thats fine. im just saying i dont prefer the sound of any of these over what i have

Is this in a true dual configuration with headers or stock rear y-pipe ('89)?

Here is a link to chambered muffler eliminators that Eckler's sells.

http://www.ecklers.com/product.asp?p...6NFCU64GJ46TA3

Hope this helps.

I have been thinking about getting some, but would like to hear from someone how they sound. My guess is they sound pretty good.

He has a '96 and those Eckler's units won't fit. 1996man, go to Mid America for the chambered units.
Quote: Get Chambered Exhaust Sound For Your C4

Get that early vintage Corvette exhaust sound with our Chambered Exhaust Eliminator Pipes. Made from 2 1/2" aluminized steel. These Chambered Eliminator Pipes give a deep, powerful side exhaust sound at idle and cruise speeds, easily allowing conversation or stereo listening. But when you "stand on it", your Corvette will have that great side exhaust growl! All mounting hardware included.

Part Year Description Price Availability
622-852 1984-96 Chambered Exhaust Eliminator Pipes, aluminized $219.99 See Below

hmmm thats not a bad price at all and should do what i need it do (back pressure, sound and looks)