Extrude Hone Porting

[GLPoomobile 958]

Just thought I'd start a topic about this to see if would generate any interesting discussions. I know how much we all love these airflow topics on here

 

I first heard about extrude honing a few years back when I used to read a lot of the American websites to do with import tuning. Particularly with the big power Supras this was often mentioned - extrude honed turbo housings, extrude honed manifolds etc.

 

Anyway, it just randomly popped in to my head and I was wondering why it was something you never see mentioned over here. A quick google revealed it's a patented process that this company in America operates, hence why it's big over there and not used over here.

 

Other key reasons why us lot wouldn't use it are cost/benefit, and the fact that most NA tuners swap to ITBs rather than pissing about trying to improve flow in the standard inlet manifold.

 

So forget for a moment the idea of using it on any XU engine. The reason I'm posting the topic is just to see if anyone has heard of extrude honing before, if anyone over here has any experience of it, and most importantly of all, is it even relevant or beneficial? For instace, if one was determined to retain a standard inlet manifold and wanted to improve flow (let's assume no AFM) would this be any good? I know the standard inlets are incredibly rough inside. Or would smoothing the inside of the manifold ruin swirl etc?

 

Educate me

Edited March 4, 2008 by GLPoomobile

[tom_m 0]

i've heard of it yes, but thats it.

[GLPoomobile 958]

Fascinating debate lads.

 

Join me next week when I'll be kicking off an in depth discussion about the merits of using nail clippers compared to nail scissors

Edited March 6, 2008 by GLPoomobile

[kyepan 291]

this sounds interesting, does anyone have anything else to add?

[miamistu 1]

Yeah, nail scissors are crap.

[miamistu 1]

Taken from their website:

 

Trade Shows

Extrude Hone will be showcasing its latest innovations at the following show:

IFPE

Las Vages, Nevada United States

 

Well it made me laugh

[tom_m 0]

i half wondered if it would be able to increase the internal diameter of an inlet manifold, but i don't think that's what it is designed to do and it seemed prohibitively expensive when i was looking into it.

 

i always use clippers myself, i can't get the hang of nail scissors

[GLPoomobile 958]

Yeah, clippers for me too. Can't cut with my left hand so I'd have mutant long nails on my right hand if clippers didn't exist!

 

Think that's this topic well and truly cocked now

[James_R 3]

Nova tech sent off a nova inlet to be done by this company, but that's only because the class rules stipulated that std inlet and exhaust mani's had to be retained.

 

not worth spending out on when you can get a 6 inlet over an Mi on, although interestingly longman/VLR hacked out the trumpets in the plenum on their engine's

[Sandy 191]

It's all in your head (or inlet manifold)

 

And they can ensure all the media is removed and hence won't cause engine damage presumably? Generally pretty bad for power.

[brianthemagical 1]

From what i could gather the company is called extrude hone and they prot by somehow blasting some sort of media through the component? I may be wrong tho.

[GLPoomobile 958]

It's all in your head (or inlet manifold)

 

And they can ensure all the media is removed and hence won't cause engine damage presumably? Generally pretty bad for power.

 

Oh Sandy, I was disappointed when I read your reply last night I was particularly looking forward to a reply from you on this subject.

 

They've been doing this for years so they must be doing something right to still be in business. One of the websites I used to frequent (back when it was active, but there's been no updates in over a year) was T04R.com, which was specifically for owners of big power Supras. Some of those guys (Ryan Woon springs to mind) have reputations for breaking records both on the strip and on the rollers with their Supras. If this extrude honing was a risk to the engine then I'm pretty sure they would not be using the process (but as said earlier, they use it on their manifolds and turbo housings, not for porting the heads etc).

 

Forget using it on engine internals (an experienced head specialist will obviously be able to modify a head much better than a machine pumping a cutting compound back and forth through the head), I'm just interested in knowing if such a process has any value on improving flow through the manifolds, or if there are downsides.

 

I'm not interested in getting this done myself, just want to learn something

Edited March 7, 2008 by GLPoomobile

[fiji bob 0]

surely it would enlarge all of the opening rather than concentrating on potential problem areas? good if it needs enlarging but what if most of the port is already big enough or too big

[Sandy 191]

Sorry to disappoint you! I like the idea, but without seeing what it does and what you get for real, I think i'll remain sceptical by instinct.