Thread: Flipping cast headers for turbo manifolds question

I have a VT 304 ive purchased sitting on the engine stand. A pair of cast headers and plan on using them for a turbo setup.

I read you could flip them run them here run them there. The bolt holes all line up no matter what orientation they are but the exhaust ports dont.

Am I doing something wrong?

How do people run these for a turbo setup?


Thanks

Its not upside down, its side to side. That way they face forward. Happy fabrication.

I used the super short 4-1 hsv headers with good success. Had to modify the passenger side (use drivers side Mani on pass side). Had to take pie cuts from the top of the pipes straight after the head flange to correct the direction that the collector points at. Do it right and you can fit a pipe down between the back of the oil pump and the k frame/engine mount.

Drivers side (using old passenger side header) bolts up.

And yeah they point forward and down. All bolt holes and ports line up sweet.

Anyone have a ls exhaust gasket they can compare with an bn head exhaust manifold gasket and post a pic I wonder how close the exhaust port spacing are

Originally Posted by tuf72

Anyone have a ls exhaust gasket they can compare with an bn head exhaust manifold gasket and post a pic I wonder how close the exhaust port spacing are

The same, quite a few guys doing this.
Just gotta change the flange or make an adapter.

Originally Posted by HQ 368

The same, quite a few guys doing this.
Just gotta change the flange or make an adapter.

Thats a big help aliexpress has some cheep stainless turbo manifolds at that price it's worth having a go few hundred bucks

vt casties stick out further than vn-s & think outlets different angle.

Seen drivers & passenger side stay as factory just pipe run under sump joining them that then goes near engine mount straight up to mount turbo under guard..can also mount turbo off the head easier.

Downside is heat & clearance under starter.

Thank you all for the replies.


Aren't the LS exhaust ports round? Where as 304 are a rounded rectangle?

Originally Posted by tuf72

Anyone have a ls exhaust gasket they can compare with an bn head exhaust manifold gasket and post a pic I wonder how close the exhaust port spacing are

Port matching of minor detail. Plug/lead clearance may be an issue.

Windsor is also an option.

Originally Posted by jchantrey

Thank you all for the replies.


Aren't the LS exhaust ports round? Where as 304 are a rounded rectangle?

Pipe size is close to 1.625" round for HV8, most LS is to suit 1.75 round.