OK is bigger really better I am getting my custom exhaust done this weekend and I want 3' all the way But is that a little over kill what do you guys and Gals think ? What are the disadvantages and the advantages? Thxs

 

Turbo car? NA? Mods?

 

3 feet???


-Ted

 

Sorry its a 89 rx7 vert NA running about 50 shot of nos, custom cold air induction, and Jet V force computer
thxs

 

Then bigger isnt necessarily better..

 

That 3' exhaust maybe overkill. I would try 3"

 

LOL

Actually, for an NA I would stick with 2.5"...just my opinion.

 

lmao such ****** these days... but yea u shouldnt go with 3 u should go 2 1/2 feet with 5 feet wide CHROME exhaust tips.. o yea

 

I take teh funnay where i can get it.

 

You're running "about" a 50 shot. Not really sure?

 

2 1/2 inch should be good for up to about 325 horsepower. 3" would just be over killer and add extra weight. I am pretty sure a 3" is good for up to like 800-1000hp. I know some guys that tried a 4" exhaust but that was on a supra making like over 1200 hp. If you still want to brag about having a 3" exhaust start the system at 2 1/2 at the engine an expand as it goes back. Thats really how an exhaust system should be designed. Hot gasses dont need as large of pipes because they still have high pressure which leads to better flow. As the gas cools looses pressure and slows down it needs a bigger pipe to travel through.

 

I would not put a 3" system on an N/A. That is good for a turbo because backpressure is created by the turbo, then the turbo needs to push the exhaust out as fast as possible.

A N/A engine needs some back pressure in the exhaust and a full 3" would not have enough restriction.

I am currently building a custom 2.5" single exhaust for mine and 2.5" is still very big for the displacement of our engines.

 

agree with 2.5..........i did 2 1/4

 

2.5" cause 3" is overkill

 

That ugly rumor comes up again. Backpressure is not needed for an engine to run. Prove it, either with a dyno or mathmatically.

 

Ok I think ill go with 2.5 thxs