Extrude Hone
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Extrude Hone
Just curious, those that have had head work done, have any used this company?
http://www.extrudehone.com/
I used to read about it alot in the domestic magazines back in the day, just wondering if anyone here has used it.
http://www.extrudehone.com/
I used to read about it alot in the domestic magazines back in the day, just wondering if anyone here has used it.
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13 years I did some extrude honing on a Q45 engine..........didn't improve things much as Japanese have used precision machining for years to squeeze out superior flow efficiency in their designs.
The $150 per HP rule applies to this proceedure...........the thing you do after spending $10,000 to gain the last 5-6 HP.
The $150 per HP rule applies to this proceedure...........the thing you do after spending $10,000 to gain the last 5-6 HP.
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Originally Posted by rocks
Some people tried it in porsche 928 intakes and got maybe 2hp at the wheels. Its not worth it.
I beg to differ. It is most definitely worth it.
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Originally Posted by rocks
It depends on how crappy the manifold is to start with. If its a good flowing design you will not see any gains.
Just because a porsche 928 only got 2hp doesn't mean squat to me, I don't know what all was done to it or what motor was in it.
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I've done this on the manifold of a Honda I had years ago. No gains. Results are going to vary by car. I would not recommend it on cylinder heads. I've heard nothing but negatives on the results for heads.
As for manifolds, its going to depend on where the restriction is. If the manifold already outflows the throttle body and heads, then there will be no gains. If the manifold flows less than your other parts, there will likely be gains.
As for manifolds, its going to depend on where the restriction is. If the manifold already outflows the throttle body and heads, then there will be no gains. If the manifold flows less than your other parts, there will likely be gains.
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Originally Posted by chimmike
I did it on a b15 sentra intake manifold a couple years back. With a tune on mild boost on a 1.8L engine I saw an increase of almost 20whp and 25 ft-lbs.
That's more along the lines of what I've read about it. I would think it mostly depends on how porus the metal you're working with is to begin with. I could see an intake with long individual runners (alond the lines of tuned port) would have more of an increase than others, although I think heads of any kind would benefit the most. I don't know how much it would cost to do a set of heads, but from a time standpoint, I would imagine it's much quicker than the alternative. I'd like to see a VQ head flow comparo with this vs. traditional. I was asking because I see a short block in my future, and hell, if the heads were off...
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I actually have a head from an old 4banger motor I had done sitting in my garage, and it's friggin beautiful. Makes porting and polishing look lousy in comparison, actually. and is a bit cheaper too!
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