Exhaust manifold

[STU666V]

What would be the best size of pipe for a exhaust manifold? 1 1/2", 1 3/4"

And what sch of pipe? sch 40? 3.68mm

Ta

 

[MarkTurbo]

If what I read on the subject was right you need them small enough to speed the exhaust gases up before the turbo to help spool but not so small that you restrict the flow at high rpm. I guess there's probably some sort of calculation you can do to work it out.

If its any help Mazworx use 1 1/2 " sch 10 on their manifolds.

 

[Spikey]

Just measure the exhaust hole on the head or gasket and make Match that. you cant be far off that way.

 

[Fast Guy]

I guess there's probably some sort of calculation you can do to work it out.

There is.;-)
http://www.wallaceracing.com/header_length.php

 

[STU666V]

There is.;-)
http://www.wallaceracing.com/header_length.php

Good link if i find out the answers to put in ;-)