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Old 12-05-2005, 12:40 PM   #1
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Decided on more extrude honeing..

Before the collecting of parts for the upper engine half continues, I've decided to have my 2.3na intake manifold extrude honed.
http://gethoned.com/process.html

I already have my turbo intake, and tbtc done.

Anybody else interested?
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Old 12-05-2005, 12:49 PM   #2
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how much did they end up charging you for that?

-KM
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Old 12-05-2005, 12:53 PM   #3
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hmm I have a 2.3 intake manifold and head laying around....how much does it cost?
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Old 12-05-2005, 02:08 PM   #4
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Abrasive flow...nice. I got a chance to see that stuff in action at school a few years ago...does a hell of a job.
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Old 12-05-2005, 03:52 PM   #5
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how much did they end up charging you for that?

-KM
About $450. Having done this, IMHO not worth the gains.Price List
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Old 12-06-2005, 01:26 AM   #6
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Quote:
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Originally Posted by AeroDynamic
how much did they end up charging you for that?

-KM
About $450. Having done this, IMHO not worth the gains.Price List
I agree, actually. The behavior of the extruded material doesn't simulate the behavior of the gas well enough.

The idea behind extrude honing is that the abrasive "goo", which you put through the manifold, will naturally eat away at parts where it doesn't flow smoothly. It assumes that those same parts will be the parts where the air doesn't flow smoothly.

Unfortunately, air behaves much too differently from the "goo" for it to work right. (Reynolds number) It's not to say that you'll lose power-- you should still gain some. But, as was said, the gains just aren't worth the cost. Someone very well-versed in fluid dynamics could probably increase the flow more effectively with a dremel tool and a few bits, and probably for cheaper.

But, hey, that's just my twocents.
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