Who makes the best cylinderhead for my EVO
Jul 4, 2005, 03:58 PM
#16
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Originally Posted by Full-Race Geoff
i highly recommend head games motorworks, that is where every one of our (and our customers) heads go.
Headgames ports Sean Glazer's heads (for reference). The work is very very very good, just slow. However his prices are so reasonable, its worth the wait.
Headgames ports Sean Glazer's heads (for reference). The work is very very very good, just slow. However his prices are so reasonable, its worth the wait.
Jul 4, 2005, 04:14 PM
#17
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Just by way of reference I have tuned several cars which swapped to Buschur Stage III heads and they all required 14 - 16 % more fuel through out the power band with the Buschur head which shows me they work very well.
if you take a look at the development toys in Buschur's engine shop you will soon realize he has one of the best equiped engine shops in the industry. (Flow bench, balancing machine, engine dyno, cam shaft line bore, etc).
if you take a look at the development toys in Buschur's engine shop you will soon realize he has one of the best equiped engine shops in the industry. (Flow bench, balancing machine, engine dyno, cam shaft line bore, etc).
Originally Posted by davidbuschur
Our heads perform across the entire RPM and lift range. There are mention of quite a few shops on here that can do the porting work. Some of them I have had here on "our" flow bench and tested. Most of which were well off from advertised and the others were just a complete joke. I have lists of heads we have flowed and the numbers they produced.
Any car running nitrous can be left out of head equation as far as I am concerned. So when looking at who is running what, if you are looking at their head just skip them if the car is on nitrous. Put enough nitrous in the engine and it will run with a ****ty worn out stock head. I know this from running our own cars and using parts in a pinch.
We have AWD DSM's running 10.0's without any nitrous and still close to 3,000 pounds. We have EVO's making in excess of 600 whp with our heads and no nitrous. They are reliable and machined correctly. We use SS o-rings in the head for extra sealing, SS valves that are then coated, upgraded springs and titinium retainers.
We do not advertise flow rates although I will tell someone the percentage we gained. A fliow bench is a dyno. Everyone reads different and the one we use is WAY off from the SuperFlow that every other shop seems to use. Superflow reads substantially higher than the bench we use.
We have cut heads apart with band saws to find where they can and can't be ported, destroyed quite a few porting them to find the best all around way to do it.
Anyone can hog a port out and get a big number at high lift. A bunch of guys have found after their great port work they immediately or shortly after running the head they get water in their combustion chambers. There is only so much that can be taken out of certain areas and some of those areas would be the most beneficial place to remove/reshape it.
Remember, most cams for the 4g63 only lift to about .420, call it .450 if you want. I see guys flowing heads and making big claims at .500 lift, who cares?! The engine never sees .500 lift!
The heads for the EVO gain flow from .100 to .450 where we stop flowing them.
There is my input. Buy your head from whoever you like, we honestly have a very difficult time keeping up with head porting anyway, two weeks is our turn around time. When you get it the job is done right. No shortcuts and the same head porting/parts we would install on our own cars.
Thanks,
David Buschur
www.buschurracing.com
Any car running nitrous can be left out of head equation as far as I am concerned. So when looking at who is running what, if you are looking at their head just skip them if the car is on nitrous. Put enough nitrous in the engine and it will run with a ****ty worn out stock head. I know this from running our own cars and using parts in a pinch.
We have AWD DSM's running 10.0's without any nitrous and still close to 3,000 pounds. We have EVO's making in excess of 600 whp with our heads and no nitrous. They are reliable and machined correctly. We use SS o-rings in the head for extra sealing, SS valves that are then coated, upgraded springs and titinium retainers.
We do not advertise flow rates although I will tell someone the percentage we gained. A fliow bench is a dyno. Everyone reads different and the one we use is WAY off from the SuperFlow that every other shop seems to use. Superflow reads substantially higher than the bench we use.
We have cut heads apart with band saws to find where they can and can't be ported, destroyed quite a few porting them to find the best all around way to do it.
Anyone can hog a port out and get a big number at high lift. A bunch of guys have found after their great port work they immediately or shortly after running the head they get water in their combustion chambers. There is only so much that can be taken out of certain areas and some of those areas would be the most beneficial place to remove/reshape it.
Remember, most cams for the 4g63 only lift to about .420, call it .450 if you want. I see guys flowing heads and making big claims at .500 lift, who cares?! The engine never sees .500 lift!
The heads for the EVO gain flow from .100 to .450 where we stop flowing them.
There is my input. Buy your head from whoever you like, we honestly have a very difficult time keeping up with head porting anyway, two weeks is our turn around time. When you get it the job is done right. No shortcuts and the same head porting/parts we would install on our own cars.
Thanks,
David Buschur
www.buschurracing.com
Jul 5, 2005, 05:00 AM
#18
Originally Posted by davidbuschur
We do not advertise flow rates although I will tell someone the percentage we gained. A fliow bench is a dyno. Everyone reads different and the one we use is WAY off from the SuperFlow that every other shop seems to use. Superflow reads substantially higher than the bench we use.
BTW, what flowbench do you have at the shop?
Jul 5, 2005, 10:35 AM
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Originally Posted by Nesiop
According to Dan at Garage-Defeat his head was done with them. There head shop is down south that does it.
Jul 5, 2005, 11:48 AM
#21
The EVO8 cylinder head on the intake side gains 4% more flow at 100 lift and slowly increases to 9% more flow at 400 lift on the intake side. On the exhaust side the gains are much higher starting at 100 lift the flow is increased 2% and by 400 lift it is up 23%.
David Buschur
www.buschurracing.com
David Buschur
www.buschurracing.com
Jul 5, 2005, 04:06 PM
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Originally Posted by WOT
www.PortFlow.com
Buschur & other reputable shops are certain to produce great products.
I could be wrong, but I dont believe to many other vendors here have as much engine manufacturer Championship winning experience as Tom @ Portflow.
Buschur & other reputable shops are certain to produce great products.
I could be wrong, but I dont believe to many other vendors here have as much engine manufacturer Championship winning experience as Tom @ Portflow.
PM me for pics etc.
Last edited by 954DRGSR; Jul 5, 2005 at 04:49 PM.
Jul 6, 2005, 05:06 AM
#23
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[QUOTE=davidbuschur]The EVO8 cylinder head on the intake side gains 4% more flow at 100 lift and slowly increases to 9% more flow at 400 lift on the intake side. On the exhaust side the gains are much higher starting at 100 lift the flow is increased 2% and by 400 lift it is up 23%.
David Buschur
www.buschurracing.com[/QUOTE]
When looking on your homepage, the gain in percent is bigger than mentioned here, what is the right numbers?.
David Buschur
www.buschurracing.com[/QUOTE]
When looking on your homepage, the gain in percent is bigger than mentioned here, what is the right numbers?.
Jul 6, 2005, 10:31 AM
#24
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A guy named Chris from Engine Logics in Sugar Land/Alvin, Tx takes credit for Curt Browns head work. He just did some block work for an Mr2 I just built and was trying to talk me into letting him work on a head for my evo. He told me he's willing to cut a good deal to get more of his work out there. Here's the link to his website.
http://www.enginelogics.com/
http://www.enginelogics.com/
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