Extrudehone??
- Thread starter tjm73
- Start date
stang22
Active Member
stang22
Active Member
Go to www.extrudehone.com
I believe they have a shop in PA. Cost is relativly expensive. Last time i checked the site it was about $400-$500 to do a stock intake!
Good Luck!!!
I believe they have a shop in PA. Cost is relativly expensive. Last time i checked the site it was about $400-$500 to do a stock intake!
Good Luck!!!
For $500-$600 I could buy a better aftermarket intake. I didn't think the cost would be that high. The GT-40 and RPM II are that kind of money and I know they flow the kind of numbers the Thumper ported heads flow. I'd go that route before the Extrude hone.
It's just not worth the cost at that price.
It's just not worth the cost at that price.
jwzg
Member
As Kim (moderator) once told me: you don't use pipe cleaning technology to port an intake. It does bad things to the short-side radius, which increases turbulance. (See I was paying attention, Kim 
) BTW, if you are using a stock intake, the upper is not the restriction and is not so until you reach around 200 cfm/runner on the lower. That's around the maximum usable airflow on Thumper heads anyway, so save your money and send the lower to Tom Moss or port it yourself for a fraction of what what even a new one would cost and still keep your stock look.
) BTW, if you are using a stock intake, the upper is not the restriction and is not so until you reach around 200 cfm/runner on the lower. That's around the maximum usable airflow on Thumper heads anyway, so save your money and send the lower to Tom Moss or port it yourself for a fraction of what what even a new one would cost and still keep your stock look.
Michael Yount
Mustang Master
tjm - the upper isn't the bottleneck - it will flow up in the 190 cfm range (very close to Explorer/Cobra/GT40). The lower is the bottleneck. Get tmoss to open up your stock lower - with Thumpers heads that combo will work quite nicely for WAY less than the aftermarket unit. And, it will make better bottom end to boot.
Check out Tmoss website. Go to community section and read up. It is enlightening. Aftermarket intakes look cool for sure, but they are hard to justify on a performance only basis, unless you are building something pretty rowdy. Regarding the extrude honing. I am very curious how the porting is directed in a constructive manner. Not that it matters. The price is so ridiculous you might as well buy a top end manifold and have it hand ported just a bit if truly needed.
jwzg
Member
The point is that Extrude Hone cannot be directed in any manner that defies the laws of physics. This is better stated by Kim from Corral:
Its a pipe cleaning process. Pushing an abrasive "paste" media through the pipes (of large industrial style engines and such) to remove deposits.
Anyhow, the disadvantage is that it is a fluid, very thick, but fluid and it follows fluid dynamic laws. Run a fluid through a short radius and the outer mass accelerates and the short side stalls. (You be catching where this is going) When we try to improve the flow of anything... Heads, intakes, etc... For the most part we stay away from the outside of the curve and reduce the turbulance caused at the inside of the curve to improve the flow. All extrude honing does is increase (somewhat randomly) the cross section of the piece. It does not address, and in some cases worsens that short side bend.
See the point? It woke me up too. Now I have a manifold that fits what I want it to do and don't have a lighter back pocket to boot.
Its a pipe cleaning process. Pushing an abrasive "paste" media through the pipes (of large industrial style engines and such) to remove deposits.
Anyhow, the disadvantage is that it is a fluid, very thick, but fluid and it follows fluid dynamic laws. Run a fluid through a short radius and the outer mass accelerates and the short side stalls. (You be catching where this is going) When we try to improve the flow of anything... Heads, intakes, etc... For the most part we stay away from the outside of the curve and reduce the turbulance caused at the inside of the curve to improve the flow. All extrude honing does is increase (somewhat randomly) the cross section of the piece. It does not address, and in some cases worsens that short side bend.
See the point? It woke me up too. Now I have a manifold that fits what I want it to do and don't have a lighter back pocket to boot.
There are some pictures of EH runners in the Community section of my site in the Photos. I think hand porting is clearly superior - but I AM biased.
