fe heads

[cobrabritt83]

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]

I'd check with Brent at B2. He's your guy when it comes to FE stuff. brent@b2motorsportsllc.com

[blykins]

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]

it would be on a 427 s/o with a stock crank and a 4.25 bore

[blykins]

I think it would be worth your while.

[Racer_X]

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]

We get 325 @ .650" out of our Edelbrock heads with 2.150"/1.730".

[Barry_R]

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]

Originally Posted by Barry_R

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]

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.