Extrude Honing?
 

What are ya'lls opinions on extrude honing? I see alot of intakes are ported by hand but won't extrude honing provide a more consistent and powerful result?

Re: Extrude Honing?
 

My intake was extrude honed, was only 34mm......I opened it to 36MM and put down 391rwhp with no tune

Might as well pack that intake an send it to Crystal Lake, Il for the most hp per $ around(shameless plug).

Re: Extrude Honing?
 

Are you sure yours isn't ported? (by looking at mods)

Re: Extrude Honing?
 

Wow that's like almost 80hp with the honing :notworthy! Did you have any other mods to achieve that number? Also, how long did it take for the porting work to get done and is the pricing similar to what a port done by hand costs?

Back in the old days, extrude honing was the way to go. Intakes and heads were extruded and the results were always spectacular - at least on Mustangs. Just not sure why I haven't really seen it mentioned here with regards to the ZR-1...Seems logical to me :dontknow:

Re: Extrude Honing?
 

Well not quite sure how to tell? I'll see if I can get a pic of the intake when I get home Thursday night (working out of town) and post it here. I would assume the insides would be smooth as glass???

Re: Extrude Honing?
 

If its extrude honed you can crack the TB and see inside is smooth as glass

Re: Extrude Honing?
 

I used EH on the Xfire manifold of my 84. I think it worked there but it wasn't cheap. I understand the people at EH are reluctant to do LT5 plenums because runners may separate from plenum due to high pressure.

Re: Extrude Honing?
 

Talk to Scott, hiznhrz. His car had EH heads, I/Hs, and plenum.

Re: Extrude Honing?
 

seems like a lot of money for not much gain

Re: Extrude Honing?
 

The Extrude Hone process has both positive and negative aspects.
It would work well inside the plenum which is hard to access by hand.
Smooth as glass... well it looks nice but a high polish is not helpful in promoting intake air flow.
Extrude Hone can not target specific areas - like injector bosses for example.
Bottom line: generally you'll get better results with properly done hand porting.