I just got my PerformerX manifold for my B18C5 build, went to the machine shop to bore the opening to 68mm only to find out he can't do it. He said that he doesn't have anything big enough to clamp the manifold in place to mill it. He used his digital inside-outside caliper and measured 65.98mm diameter on th emanifold, so I decided to bolt it to the throttle body and see what is the difference like. I need you guys to look at it and tell me if there would be any drawbacks in bolting them together "As Is".

 

even with a dremel and some patience it can be done... if you know what you are doing.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Chris Tune &raquo;</TD></TR><TR><TD CLASS="quote">even with a dremel and some patience it can be done... if you know what you are doing.</TD></TR></TABLE>

 

if I was to use a dremel, it would be best to do it with the TB still bolted,right?

 

yea u can do that, or just mark it where it needs to be cut

 

I just ordered my performer x and was going to buy the 70mm tb with it. but for the 70mm tb to be effective i will have to bore the manifold out to match the tb?

 

well it will be better to have it matched, so it will just all flow together

 

bolt it on...use something to mark the edge that's "sticking out", take the tb off, get the dremel and go to work

if you port it a little bigger than what you marked, i believe this is okay but i would just be careful and take my time so the air has a nice transition from TB &gt; IM (aka port matching)

 

will the stock itr tb bore to 70mm cause im not going to buy a 70mm tb if i can just bore mine out for cheaper.

aka.. bolt itr tb to px manifold bore both to 70mm... will it work?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by grjp1988 &raquo;</TD></TR><TR><TD CLASS="quote">will the stock itr tb bore to 70mm</TD></TR></TABLE>

No and you do not need a 70mm throttle body....

 

Get the throttle body gasket, put it up 2 the manifold n mark the opening..get a dremel n go 2 town...