port and polishing intake manifold????

[pinkley]

i been thinking about porting and polishing my stock LS intake manifold. just curious of what kind ofhp gains i might get if any at all and would it even be worth the trouble.

 

[chris_q]

i been thinking about porting and polishing my stock LS intake manifold. just curious of what kind ofhp gains i might get if any at all and would it even be worth the trouble.

idk if you will get any hp if u do that
but my best opinion is get a skunk 2 intake manifold thats wat i got on my gsr and its a big different i went from stock mani to skunk2 mani and big diferenceee

 

[pinkley]

idk if you will get any hp if u do that
but my best opinion is get a skunk 2 intake manifold thats wat i got on my gsr and its a big different i went from stock mani to skunk2 mani and big diferenceee

Did you have any other mods other than the manifold?I've read that if you don't have aftermarket cams a intake isn't going to do much for you. Actually loose hp. That was on streetracing.com ive done a little research but everyone keeps saying the same thing. If I'd gain anything on a p/p I'll get that done. And it will be alot cheaper for me sense I have a good friend that does it on the side. Idk... I'm still learning about these cars.

 

[DaddyBuiltRacing]

You wont gain any noticable power by poting and polishing your intake manifold. The only way you'd see a difference is if you also port and polished your head, ran a different throttle body and had car re-tuned. You do 1 mod, you have 2 others that need to go along with it, thats just my rule of thumb. For instance you put big cams in your motor, you then need valvetrain and tuning...thus the 1 mod=2 more theory. put a header on the car, you then need highflow cat and bigger piping...again 1 and 2.

Either leave it stock, port it along with the head and get throttle body or buy aftermarket manifold and throttle body

 

[jcrabb13]

If I'd gain anything on a p/p I'll get that done.

A smooth polished edge on the interior of any chamber with air going through it will allow greater airflow.

That's just physics. I don't know what the actual gain will be if even noticeable (no experience), but it will be an improvement. Plain and simple.

EDIT: I'd listen to nerks ^^^ he seems to know his stuff pretty well!

 

[pinkley]

Here is another question I'm just going to throw out there. I've heard of people putting a Gsr head on a ls and converting it to vtec. What are the gains there? I have access to a Gsr head my buddy is trying to sell me but I'm not sure what all I need.