Resolved 2G Manifold Porting?

[Blurred Talon]

Since I can get a hold of a 2G manifold dirt cheap I'm wonder if I can port it myself and what I port on it?
Also will a 14b bolt to the 2G manifold?

 

[miteclgst]

check out this v-faq, it's what I followed when I did my port job. http://www.vfaq.com/mods/porting-exhman.html you simply port match to your manifold gasket and remove the step out of the collector if you aren't still using the steel sleeve. Also removing any casting marks probably wouldn't hurt.

 

[mitch83]

as well as sending it to RRE and having them extrude hone it which will port the intire manifold all the way up the runners and not just the ports.
mitch

 

[1fast97gsx]

as well as sending it to RRE and having them extrude hone it which will port the intire manifold all the way up the runners and not just the ports.
mitch

yea but to the average person doing that is overkill. Hell a non ported 2g manifold is good for 12s!!!

 

[Blurred Talon]

check out this v-faq, it's what I followed when I did my port job. http://www.vfaq.com/mods/porting-exhman.html you simply port match to your manifold gasket and remove the step out of the collector if you aren't still using the steel sleeve. Also removing any casting marks probably wouldn't hurt.

Thanks!

 

[mitch83]

yea but to the average person doing that is overkill. Hell a non ported 2g manifold is good for 12s!!!

ehhh this is true
mitch

 

[miteclgst]

Mitch83 is right I mean hand porting will not achieve the results that a good extrude hone will and no matter how hard you try you will end up with slight differences. But opening up the runners on the 2G manifold to match the 1G head should be the main focus. It has been discussed in many threads before that the exhaust manifold, whether tubular or cast, will not add much, if any, power. The main contribution a good exhaust manifold will have to the turbo system is the ability to lower spool up time. Don't get me wrong a poorly fit cast manifold that has steps between the head and runners and the collector and turbo will hinder performance. Once this matching is done the rest will simply decrease lag, and with a turbo such as a 14B you won't need to be all that worried about lag. This is the point, I believe, that 1fast97gsx is making when he says that the manifold has been proven to be good from some 12 second 1/4s. Someone without a huge turbo that dosn't spool till 4K will not benefit as much from an extrude hone as will someone with a larger turbo. So in essence a costly extrude hone would not be practical for the situation at hand.

 

[eclipse420a2nr]

go to the tech articles. theres a good article that shows you how do it with pic of a 1g mani. you could DIY on the runners if you take ur time. and yes, a 14b will bolt to a 2g exhasut mnaifold. theres an article on that too. look through them, theres alota good stuff.

 

[mitch83]

I dont see him being able to DIY on the runners its' an actual specialty tool that is used to extrude hone not just a dremel and a metel grinding bit. I want to say you can even buy and extrude honed mani from RRE for like $200.
mitch

 

[Bigmike4g63t]

20 years ago i ported and polished mine along with the o2 housing and turbo housing. All gasket matched. I had never done it before that time. It turned out well and made a noticable difference.

 

[Canadian_CD9A]

What a coincidence, this thread is also 20 years old!

 

[curt-s]

Ah, to be that young again ..

 

[Bigmike4g63t]

I didn't even look at the date on that. Talk about bringing back the dead.....