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Head flow |
Post Reply | Page <1234 8> |
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Steve_P
AMC Addicted Charter Member Joined: Jun/28/2007 Status: Offline Points: 3808 |
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362 cfm is possible- but maybe at 60" H2O
I doubt you could get that from a factory cast iron casting at 28"- maybe not even with the valve removed.
I got ~263 cfm at .5" at 28" H2O but obviously quite a bit more than that is possible. I don't remember what the best in the flow data by Ken Parkman is.
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steeters
AMC Addicted Joined: Feb/02/2008 Location: California Status: Offline Points: 895 |
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Oh, and I don't know if there is epoxy in there or not (Hurst390). Like I said, might post the info himself.
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BassBoat
AMC Addicted Joined: Aug/29/2008 Status: Offline Points: 1719 |
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Mine flowed 294 at .700 lift, at 28" That is a 2.10 DelWest valve turned down to 2.07. The party that owned the flow bench had heads that flowed more than mine without epoxy. That said, I would never suggest that you can translate from flow bench to flow bench any more than you can compare dyno to dyno. BB
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74Bubblefender
AMC Addicted Charter Member Joined: Jun/29/2007 Location: The AMC form Status: Offline Points: 2589 |
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We are just about to forge new AMC V8 crankshafts.. please check here
http://www.bulltear.com/forums/showthread.php?19564 |
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Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Offline Points: 5822 |
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no epoxy...I uses a stock mr gasket intake gasket also...The flow is to get big past the pushrod and in the bowl entry..and i'm sure mine has some weld in places where a hole occured..mine are 290's at 800 lift I think..
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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steeters
AMC Addicted Joined: Feb/02/2008 Location: California Status: Offline Points: 895 |
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Is that the fastest factory head car without epoxy? Steve
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Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Offline Points: 5822 |
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LOL..I don't know? I think Glenn Quinn had iron heads and ran 8's...alot lighter car but alot faster..You have Barry's and Hemi's ss/b cars...Aris ss/c...etc. My car is pretty close to SS/C weight I think...But i have no idea if they have epoxy..
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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amccar
AMC Apprentice Joined: May/27/2009 Location: Tennessee Status: Offline Points: 162 |
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Anyone have heads with epoxy? What are the problems that you have to watch for and how hard are they to work with?
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Hurst390
AMC Addicted Joined: Apr/20/2008 Location: secret Status: Offline Points: 5822 |
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Maybe it depends are where the epoxy was placed?...I have ground through at the pushrod pinch point on my own heads I have done(I have never tried to epoxy a hole into coolant)...and I have used high dollar putty made by permetex..and had some come out...so after talking to an old ss racer years ago he told me of his same problems..and he found out that after cleaning your parts as good as you possibly can.. take wesleys bleach white and scrub the area to be epoxied....
I went to that method and have never had any come out since! and now I just use regular old plumbers putty that comes in a stick....
I practiced with some devcon on a pontiac engine at the push rod pinch...it didn't last 2 weeks...went back with the above method and plumbers putty and it's stayed intact for 10 years...
but here is the thing...before I took my engine to Barry Allen I would spend alot of time on my heads making the port opening bigger,higher etc...My engine that Barry built for me has a stock intake port opening and placement..he made the pushrod pinch almost flat and when he got by the push rod thats where the real port work begins......
so my best advice is send Barry or Hemi a set of heads and let the pro's take care of the heads....
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SC/Hurst Rambler
11.62 120 100% Street Legal |
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trrowe
AMC Fan Joined: May/08/2010 Location: CA Status: Offline Points: 1 |
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You don't have that much flow because Dean Turk didn't do your port work. When Don Garlits came out of retirement to attempt to break the 300 mph barrier he chose Dean Turk to do all the port work on his cylinder heads and manifolds. Thats how good he is. He has turned away work for years because he's always swamped with work. He will only do port work for true enthusiasts and always achieves the best flow numbers. Dean has been retired for many years, but still does the best port work in the country for a select few. He was a pioneer and early dominating force in the early 60's, First in a Pontiac powered Fuel dragster and later with a Crysler Hemi Fuel dragster.If you don't know of Dean, then you missed out on a truly fine human being that would be just as excited as you are to see you (and help with the best possible porting) tweak as much performance as possible out of your AMC.
I'll never forget hearing a deafening roar from my shop, and running outside to see Dean smiling and tuning Eddy Hill's Top Fuel dragster right before Eddy retired.
No finer cylinder head, intake manifold porting guru has ever lived. He always did extra work for the regular "Joe." especially if you wanted performance from a platform that wasn't the typical "performance" vehicle.
Thanks, Dean, Ed, Bill, Jerry.....
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