cfm on Edelbrock Heads

[BBKNARF]

Has anyone else flow bench performer rpm heads, 84cc, part #60191 ?
Edelbrock says these heads flow 291 cfm on the intake side @ .600" lift, before the work was started on mine the shop flowed them first and got 274 cfm @ .600" lift, can this be right  
After the work was done, opened the bowls up, deep porting, gasket match, good valve job and new valve springs they only flowed 296 cfm @ .600" lift, I was hoping for 310-320 cfm, even the guy at the shop was surprised, it should of been more he said, he could not cut any more material off because it was getting thin.
I reported this to edelbrock by email and never got a respond.
Now I wish I went with the Indy ez head.

[oldschool]

Has anyone else flow bench performer rpm heads, 84cc, part #60191 ?
Edelbrock says these heads flow 291 cfm on the intake side @ .600" lift, before the work was started on mine the shop flowed them first and got 274 cfm @ .600" lift, can this be right 
After the work was done, opened the bowls up, deep porting, gasket match, good valve job and new valve springs they only flowed 296 cfm @ .600" lift I was hoping for 310-320 cfm, even the guy at the shop was surprised, it should of been more he said, he could not cut any more material off because it was getting thin.
I reported this to edelbrock by email and never got a respond.
Now I wish I went with the Indy ez head.

dont feel bad,nobodys heads that i've seen flow what they say they will. i have 3 indy sr heads and a indy 572-13,and none of them flowed as claimed. the sr,s were close thou.

[Challenger340]

Welcome to the world of Cylinder Head marketing.

Thats about "right" from what I've seen, your Shops Bench is probably closer to real world. Getting the Eddy's much above 300 is quite an undertaking.

Different Benchs, different results.

[firefighter3931]

Mine flowed about the same as yours with a stage 1 portjob from PRH (see attached sheet). Dwayne says that these were some of the best out of the box e-heads he's seen to date and they typically flow in the 270cfm range as delivered. 

Bigger flow means bigger port volume which will reduce throttle response and low end power so going to a better flowing head (bigger ports) might actually hurt performance on a smaller displacement build. For a street type build i prefer a broad flat torque curve as opposed to big top end numbers and soft bottom end power. 


Ron

[BBKNARF]

Thanks guys.

[elacruze]

Mine flowed about the same as yours with a stage 1 portjob from PRH (see attached sheet). Dwayne says that these were some of the best out of the box e-heads he's seen to date and they typically flow in the 270cfm range as delivered. 

Ron

Ron, do you have the flow sheet from the as-delivered ports?

[ChargerST]

What are the flow numbers for Chapman heads and the new Mopar Performance heads (with the Chapman design) for comparison?

[Challenger340]

What are the flow numbers for Chapman heads and the new Mopar Performance heads (with the Chapman design) for comparison?

I haven't flowed the MP Heads or the Chapman design for comparison to the Eddy's on my bench.
That said,
THAT,
is where the confusion between comparisons of Different Heads, on Different Benchs, becomes apparent ?

Different Benchs can give Different numbers?
No Matter,
the eddys are "cost effective" for 550-600 hp with a little work on pump gas.