more flow from HF mani?
 

ive heard people say that there were a couple things i could do to my HF mani to get a little bit better flow? true? thanks

Re: more flow from HF mani?
 

other than your basic porting and polishing of it, ive never heard of anything else. but i wouldnt take to much off, might weaken the little guy

Re: more flow from HF mani?
 

is ti an actual hf mani, because there are like three different ones that look almost the same

Re: more flow from HF mani?
 

hf, std, and cx/vx are the one you are talking about. heres the thread to the information.
https://www.homemadeturbo.com/tech_p...s/HF_manifold/
if ported properly they are supposed to flow as well as a log manifold, some say better.

Re: more flow from HF mani?
 

noob question but how do u port and polish a manifold ? i have an std mani and i hear they are a lil thicker then the hf so you can port and polish it more but can anybody give me some info on how to do it?

thanks

Re: more flow from HF mani?
 

i use an air compressor and die grinder.
put the exhaust gasket up to the manifold and trace the ports.
get a face shield or safety goggles/glasses and go to work.
don't get discouraged because it takes some time to finish.

Re: more flow from HF mani?
 

it should be really easy to port because its cast iron. just dont take too much off.

Re: more flow from HF mani?
 

or bring it to a machine shop and they can port for you

Re: more flow from HF mani?
 

Cast iron f'in sucks to port, use to port alot of it when hf mani's where the thing to have. A vented area and lots of patience. Cast iron smeels like ---- when grinded and leaves a lovely after taste. Not to mention all the carbon built up in the 200k mile hf manifold.