[Stan Weiss]

I know there are a lot of different numbers out there for Pontiac Edelbrock heads. This is from Edelbrock some years ago.

Stan

[johnta1]

Skip, was any pitot readings done in the port?

[Baron Von Zeppelin]

Would still be a good thing to get Randy's / Rocky's flow numbers for the CNC head.
Since that was the bench that gave the SM As-Cast and Ed Head #s we have been using.
Even though we seem to know they need some handywork finishing on the intakes.

[Skip Fix]

John do not have a pitot available on that bench. But you could sure here the turbulence start at that 290 cfm range.

[Baron Von Zeppelin]

Jegs , Summit , and Amazon all show both of those Ed Head part #s In Stock
for about $2500 pair (with valves and springs)

Edelbrock shows both numbers Out of Stock.
Probably just to get away from the retail side ?

[PAUL K]

Originally Posted by Baron Von Zeppelin

SM As-Cast
CNC
Ed Head


Intake
______SM. CnC. Ed
.200. 147. 139. 147.
.300. 213. 209. 206.
.400. 258. 269. 235.
.500. 269. 292. 259.
.600. 289. 302. 277.


Exhaust
______SM. CnC. Ed
.200. 124. 139. 115.
.300. 156. 162. 156.
.400. 177. 190. 178.
.500. 195. 209. 186.
.600. 202. 222. 197.


Yep

Those numbers are low for a 72 cc Edelbrock Pontiac head.... They're borderline low for an 87cc head. Stock 72 E-heads flow around 255 @ .400, 275 @ 500, 285 @ 600 and 288-292 @ .700. Those SM as cast numbers are a bit higher than we've seen on our super accurate NASA calibrated flow bench.

[Gach]

After seeing these results, I Just ordered a set of Edelbrock 60599 from Amazon $2526.00. For friend, wants a bolt on out box 500-525 hp pump gas combo I did with Crower 60919 cam.

[Baron Von Zeppelin]

Re: NASA

They do seem more in line with the 87cc flow numbers that Stan posted from Ebrock.
I don't think that was ever exactly clarified whether 72cc or 87cc.
Or I missed it.

If Skip hits 320cfm after some quick business with a harbor freight die grinder and a good valve job ,
His will be smoking the good stuff at 320 Int / 220 Exh

Who is selling a 320 / 220 CNC ported EdHead package ?
Its probably their recipe that is being used.

[Gach]

Originally Posted by PAUL K

Those numbers are low for a 72 cc Edelbrock Pontiac head.... They're borderline low for an 87cc head. Stock 72 E-heads flow around 255 @ .400, 275 @ 500, 285 @ 600 and 288-292 @ .700. Those SM as cast numbers are a bit higher than we've seen on our super accurate NASA calibrated flow bench.

Those are just about same flow numbers Gabby got with out box set of E-heads. I convinced him to have Gabby check them out.

Problem as I see it not many have access to a friend like Skip has, with flow bench, then who’s going to current all the issues

[Gach]

Originally Posted by Baron Von Zeppelin

They do seem more in line with the 87cc flow numbers that Stan posted from Ebrock.
I don't think that was ever exactly clarified whether 72cc or 87cc.
Or I missed it.

If Skip hits 320cfm after some quick business with a harbor freight die grinder and a good valve job ,
His will be smoking the good stuff at 320 Int / 220 Exh

Who is selling a 320 / 220 CNC ported EdHead package ?
Its probably their recipe that is being used.

It’s a no Brainer to get a set of E-heads to flow 320 especially when they are already at 292 cfm. Skip is fortunate, to you have someone a flow bench, just think about if you had to pay for all that.

[Baron Von Zeppelin]

Someone probably has a CNC program established and promoted for that flow range using an EdHead.
Just wondering who
It is most likely copied from theirs.

And how much cost to run a set through it ?

We all know the EdHeads can go beyond that range - but I think 320-325 is a popular point.

[Steve C.]

https://www.sdperformance.com/viewPr...p?productID=37

The goal of 600 hp was mentioned in this thread.
A 315 cfm Edelbrock head will cut the mustard with a Victor intake and a HP950 carb, been there and done that in a 462 CID combo
And it doesn't need a ton of compression or a big hyd roller to do so.


.

[slowbird]

Originally Posted by Baron Von Zeppelin

Would still be a good thing to get Randy's / Rocky's flow numbers for the CNC head.
Since that was the bench that gave the SM As-Cast and Ed Head #s we have been using.
Even though we seem to know they need some handywork finishing on the intakes.

Bet Randy's shows 320cfm and no turbulence.

[PAUL K]

Originally Posted by slowbird

Bet Randy's shows 320cfm and no turbulence.

I didn't know there was a shortage of flow benches in the Pontiac community.

Skip Fix is our hero!

[Baron Von Zeppelin]

Looks like whether you go with SD or Butler , a New set of EdHeads that flow 320'ish are around
$4000 after all said and done. Maybe a little more.

Butler is $800 for the CNC on your supplied heads.
Plus valve job , plus shipping , plus tax
Plus $2675 including tax for new Ed Heads from whoever you pick.

If Skip and his longtime friend can straighten his heads out nicely (most likely they can)
They might could catch some part-time side business doing them for the other Sale Price buyers.

$1500 plus tax is still pretty sweet deal , especially if you are Skip Fix.

[Formulajones]

Originally Posted by Baron Von Zeppelin

Someone probably has a CNC program established and promoted for that flow range using an EdHead.
Just wondering who
It is most likely copied from theirs.

And how much cost to run a set through it ?

We all know the EdHeads can go beyond that range - but I think 320-325 is a popular point.

Dad uses a 330 cfm Eddy round port package from KRE that was offered by them way back when. When they were sent to Tony Bischoff for rework they didn't flow 330 on his bench. He worked them to 360 cfm though.

[Steve C.]

Skip was correct. Unless they have changed, KRE uses a J.K.M. flow bench.
Apparently it is not an orifice based system. It's a pitot style.

That said, as mentioned many times different flow benches and their operators get different readings.
I had a set of factory d-port heads that flowed 292 cfm on my engine builders bench. I sold them to Paul K and on his bench they were closer to 280 cfm.
.

[Jay S]

Is the intake port entrance on Skip’s head anything you guys recognize? Since it is suppose to be of scan of someone else’s work? Looks kind of unique to me. Has pretty big arch’s on the corners?? Then looks like they may have went into port at to high of an angle? Not at the entrance, it seems like it comes into the bowl too high from the port.

Maybe this was their own efforts? Sometimes I feel like we overestimate the amount of thought SM puts into….well…pretty much anything… Lol

[PAUL K]

Originally Posted by Jay S

Is the intake port entrance on Skip’s head anything you guys recognize? Since it is suppose to be of scan of someone else’s work? Looks kind of unique to me. Has pretty big arch’s on the corners?? Then looks like they may have went into port at to high of an angle? Not at the entrance, it seems like it comes into the bowl too high from the port.

Maybe this was their own efforts? Sometimes I feel like we overestimate the amount of thought SM puts into….well…pretty much anything… Lol

Looks a little bit like Fluper's "cathedral" port design, atleast at the roof.

I did not underestimate SM's efforts. In fact I called them out on not even owning a flow bench. They don't own valve grinding equipment and I doubt a valve spring compressor, unless they copied one of those and sell it. They are in it for profit and IMO screw over there vendors with their Black Friday sale. Folks are waiting eleven months to buy some low bid priced parts hoping that they will be close to the same quality of parts that cost double.... More times than not the buyer is going to be disappointed.

Im a direct dealer for Holley and all their subsidiaries. They try hard to make vendors sell at set prices. Around the Holidays they run a special. It used to be X amount off of parts, allowing the dealer to make more profit. Then they changed it to allowing the vendor to sell at X amount off of retail, allowing the general public to buy Holley products cheaper. SM blows their chit out once a year at dealer's cost and everyone waits for that sale to make their purchases. Then their dealers can pick up on sales that weren't purchased during the "sale"... like guide plates and rockerstuds.

[Formulajones]

For me, building engines was never about how much money I can save.