exhaust manifold

[iceberg319]

if its possible to make.....would a log-type manifold flow better than the stock exhaust manifold? i kno this wouldnt be for stock ct but more for ppl with sp61gts or the boss turbos

just a thought

 

[tlo86]

didnt know anyone made log style manifolds for... well anything other than hondas i say the 7m cast will fare much better than any log style every log i have seen cracked right away

 

[WhtMa71]

Really? Ive never seen a log manifold crack. I've toyed with the idea of making one but decided that if i was going to go with a bigger turbo, might as well just buy a $200 ebay tubular.

 

[GrimJack]

This has been done. John Lunsford made one years back... I seem to recall he was going to mass produce and sell them, but I don't think it ever happened.

Of course, back then there wasn't anything that would bolt onto it other than upgraded CTs.

 

[IHI-RHC7]

The 7m casting is pretty good for flow. There are quite a few gains to be made by porting it, but a log style would be a down grade from a flow and dynamics standpoint...
Hi grim

 

[Suprapowaz!(2)]

Yeah, didn't someone on here make over 500rwhp on a stock manifold?

 

[Rennat]

my BIGGEST problem with the exhaust manifold is that the stud holes protrude INTO the manifold on the inside... have you ever looked? they just kinda "spike" right into the path... i would port them out but im scared of it cracking there...

when i attend school for welding next year im going to make a SS manifold to bolt onto the ct-26. either a long runner or a short style...

 

[GrimJack]

Mine is ported, and the ends of those studs have been ground off. Hasn't cracked on me yet. Of course, it's also ceramic coated...