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cobrabritt83 02-07-2013 03:37 PM
fe heads
 
is it worth the money taking a new set of edelbrock heads and getting the larger 2.19, 1.75 vavles installed in them compared to the stock 2.09, 1.66 valves. does anybody know what the flow numbers are for these heads with the different valves in them.

redmt 02-07-2013 04:56 PM
I'd check with Brent at B2. He's your guy when it comes to FE stuff. brent@b2motorsportsllc.com

blykins 02-07-2013 05:23 PM
cobra,

It depends on the entire combination. You may or may not pick up much at all if it's on a smaller bore block.

cobrabritt83 02-07-2013 05:58 PM
it would be on a 427 s/o with a stock crank and a 4.25 bore

blykins 02-07-2013 06:04 PM
I think it would be worth your while.

Racer_X 02-07-2013 06:41 PM
That's exactly my combination I'm building. I told my engine guy I don't want to leave any HP on the table. He said we'd spend about 35-40 hours on the heads alone, just cutting for the bigger valves, opening up the ports to gasket match and flow balancing them.

blykins 02-07-2013 06:43 PM
We get 325 @ .650" out of our Edelbrock heads with 2.150"/1.730".

Barry_R 02-07-2013 07:33 PM
Off the shelf Edelbrocks will go around 252 at .600
An Edelbrock with 2.200 intakes and some bowl work will move that up by 20-25 cfm
We need to do a full port job to get an Edelbrock to the 320+ level

On a basic 427 you'll find a nice pickup with 25 cfm...that's a 10% flow gain

FWB 02-08-2013 10:53 AM
Quote:
Originally Posted by Barry_R (Post 1230375)
Off the shelf Edelbrocks will go around 252 at .600
An Edelbrock with 2.200 intakes and some bowl work will move that up by 20-25 cfm
We need to do a full port job to get an Edelbrock to the 320+ level

On a basic 427 you'll find a nice pickup with 25 cfm...that's a 10% flow gain
and how do your new heads Barry compare to what you get with edelbrocks
at out of the box condition? and with a bowl clean up?

Barry_R 02-08-2013 05:25 PM
New heads are around 287-289 with a very basic 3 angle valve job and just blending that into the bowl and chamber - no port or bowl work at all. Considerably better than our older bowl blend parts with less work and a far better chamber. Not as high a flow as the CNC ported stuff - but that is to be expected.


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