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Important exhaust question

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Important exhaust question - 12/12/2005 2:08:50 PM   
TimmyTheWop89

 

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Well, my plan was to buy the edelbrock ceramic coated headers with y pipe for $450.00, a set made for my car. And from there, have straight 3 inch with a dynomax bullet muffler. Is there even a significant power loss compared to true dual 3 inch? either way compared to what i am right now, i will be getting a lot of power from this upgrade because the exhaust i currently have is very restrictive. a lot of people have told me duals look better, but i do not want to have split end duals at the muffler like everyone does with a 3rd generation. either true duals or one big single.

< Message edited by TimmyTheWop89 -- 12/12/2005 2:11:11 PM >
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RE: Important exhaust question - 12/13/2005 2:46:40 PM   
Lee Willis

 


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I don't know exactly what engine you have, but 3" duals would cost you more and MIGHT deliver more power if you had a lot of engine. On the other hand, you can put too much exhaust on an engine - most GM V8s like a little backpressure -I've seen some cars lose about 2% when they have bigger pipes than you need.

This is a rough shot from the hip, but I think I'd go with the single you have now unless you expect more than 275 RWHP, then I'd probably suggest dual 2 1/2 inch pipes before going to 3" size on duals (I have 3" dual on my vette and it makes 590 RWHP, and we've proven that's the right size for it)

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(in reply to TimmyTheWop89)
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RE: Important exhaust question - 12/13/2005 6:10:24 PM   
TimmyTheWop89

 

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the current motor is a 1976 4 bolt 350 bored 60 over, 750 carb, 290 cam but i wanted to get one witha litlte more off the line torque, flat top pistons with the 72cc heads. stock cast iron exhaust manifolds into a single 2 1/2 inch then into a 3 inch, really sucks.


if i were to be more precise, the motor will then have a turbo 400 trans w/ ratchet shift, but as for the motor, a high rise rpm air gap manifold, and the exhaust i mention in the prev post with no cats.

the thing is with the 2 1/2 inch duals, it doesnt seem very aggressive to me. i think 3 inch pipes are the best looking pipe size, but i dont like exhaust tips, i like seeing the raw steel.

My last question is becuase my car cant have true duals unless i get the body cut up, would it be worth it to have a single 3 1/2 inch?

To give u a quick summary, this car being built to be a street/strip vehicle. it is already damn quick, sucks u right back in the seat when u hit the gas, and i am building it to be streetable, but tear up the strip too. we were givin a brief description of what was odne to the motor when we bought it, so there could be some things i dont even know about, all i know is this motor is something else.

< Message edited by TimmyTheWop89 -- 12/13/2005 6:18:57 PM >

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RE: Important exhaust question - 12/23/2005 7:32:14 PM   
mattvogt

 

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you said a y pipe. That will defeat the pourpose of the headers and the 3 inch exhaust. You would be better off with a straigh back set or custom made pipes. The y pipe will not help the proformance at all. Good luck with this.

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RE: Important exhaust question - 12/23/2005 10:54:56 PM   
TimmyTheWop89

 

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well, what i was looking into was this part right here...

http://www.jegs.com/webapp/wcs/stores/servlet/CategoryDisplay?lang=-1&catalogId=10002&storeId=10001&categoryId=13833&searchItemId=90139

what do you mean by straight back, run the two pipes along side each other?

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RE: Important exhaust question - 12/26/2005 4:14:30 PM   
Lee Willis

 


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I think I'd go with the 3.5 " single, particularly since it helps you avoid the cutting and fabricating for the duals.

_____________________________

Aston Martin Vantage V8
Lincoln MKZ daily driver
1998 Camaro w. 408/AFR heads, etc.,+NOS street/strip

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