Topic: Anyone ever try EXTRUDEHONE (trademark)..??

[754]

I am not saying I would or not use this.

Basically, it is a process where a machine forces a greaselike subtance(mixed with abrasives) though a port or opening at a controlled rate of flow and direction. Its uses include cleaning, deburring, porting etc. Think of a cast aluminum intake manifold or TPI body.

You can achieve consistent result in a mechanized manner after initial setup.

I am thinking for a basic porting job on a quantity of heads it may be a good way to go.

Anyone ever use this process.. any thoughts..

[JLeather]

I know a number of guys who have done it to Chevy fuel injection manifolds.  I post a lot on a corvette forum where several guys have used it on the long, curved TPI runners on the C4 corvettes.  The results do look really good.  You can even have a manifold done while bolted to heads so the transfer is perfect.  But, it is expensive.  I think it's almost $600 to do a manifold with a couple pieces.  Also, not sure how it would react to the aluminum protrusions on the valve guides.  It might take away too much of the valve guide before it gets much of the port.  I would think the best way to do a CB750 head would be to roughly port the head with grinders and then send it to extrudehone to be smoothed.  The transitions are really great after extrudehoning.

[fuzzybutt]

i had it done to a set of 5.0 litre mustang heads, got me another 3 10ths in the 1/4 mile with no other changes.

[1976Thunder]

3 Honda civics 1 Nissian sentra 1 Chevy nova and 96 GSXR. Heads, intake, and on the cars exhaust its for real and works great gets everything even stuff that a port and polish job cannot.

[mattcb350f]

I've never used it myself but I've heard that it's top notch.
Thing is that you have to do a lot of prep work to make sure that it makes a smooth bore. If there are imperfections, they will not be removed by the process but rather carried on further into the port.
 Matt.

[wiretender]

I had intake manifold done on Audi TT. Outcome was excellent as process reaches areas otherwise not possible. Runners were simply beautiful. I had before and after pictures but sadly have lost.

[olds-cool]

1976Thunder, what year Sentra?  I've got an '02 Spec V

I've heard great things about this process.  The only drawback being that you could probably have a top notch porting guy do the work on a flow bench for the same price or less.

[MRieck]

1976Thunder, what year Sentra?  I've got an '02 Spec V

I've heard great things about this process.  The only drawback being that you could probably have a top notch porting guy do the work on a flow bench for the same price or less.

Right. I've used it and ....Christ... it was expensive 11 years ago. Car intakes etc...that's where it is at IMO.

[Big Jay]

The problem with it on non down drafts heads like the old Honda is when it tries to make the turn at the seat it removes too much on the long side of the radius. It leaves it like the seat is undermined on the long side.

We thought it might work on a downdraft head, so we too a scrap GSXR1000 and flowed it stock, then sent it to them to hone opnly one port.  When we finally got it back, we saw that they had hand ported all of the ports, then extrude honed one port. Didn't tell us what we wanted to know. We wanted to see what the extrude only would do for flow.

Jay

[754]

I figured they may get around that (somewhat) by entry hole opening or using a hardened metal piece to deflect flow away from an area. Probably possible if they were doing large quantity.

Interesting concept though on unportable parts at OEM level, a  problem like Jay mentioned could be eliminated by casting in more material in the affected area..

[JLeather]

They could hand-port all the ports and hit them with a quick shot of extrudehone to smooth the transitions.  I've seen early GM TPI runners done and they're 180 degree turns and aluminum.  Don't know how they figured out that one, but they were fairly evenly ported all the way through.  Maybe they've gotten better at this?

[merc2dogs]

 it works best on fuel injected systems where the fuel is injected at the port. It doesn't optimise for carrying 'heavy' fuel laden air.  sharp bends which will tend to seperate the fuel/air mix, will just be smooth surfaced sharp bends, which still tend to seperate the fuel/air.

 You can have a port that will flow perfectly with dry air, but use a carb or throttle body type injection and the power will not come anywhere near to matching what the flow figures say it should.

 It's better to have it ported by traditional means, porting has years of research to fall back on, extrude hone is just 'dumb' material removal.

Ken