More Useless SB Edelbrock Flow #'s........

Posted By: RyanJ

More Useless SB Edelbrock Flow #'s........ - 11/06/03 02:19 AM

Found some new record low/mid lift flow in the SB E heads lately so figured I might as well share:

LIFT
.100"--73.2
.200"--144.2
.300"--207.1
.400"--250.1
.450"--265.7
.500"--269.8
.550"--273.3
.600"--276.0

Mostly the result of trying out a new .080" wide 22 degree back cut on the valves....Hurts some up in the high lifts, (.600" and up) but is great for a sanely cammed street motor. I'll probably be doing this little mod from here on out on SB E heads that come through here. I never had one go over 200 @ .300" before. Actually the .200"-.550" #'s are all new highs for me, some by a considerable amount.

I think these are going on an AAR 'Cuda.... Can't remember exactly. Coke Bottle Kid knows the owner......

Posted By: Anonymous

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 02:50 AM

Great work keep up the good work can not wait to see the numbers on the W9 heads when they are done

Posted By: RyanJ

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 02:58 AM

Quote:

Great work keep up the good work can not wait to see the numbers on the W9 heads when they are done

Yeah I flowed them today too....My Back is injured, so I was'nt doing any porting today. Finally got around to flowing an As Cast port. Oh let's see...... exhaust went 208, and intake went 301 @ .650" right out of the box with just a 3 angle VJ and a 2.15" Ferrea P series valve.

My first attempt at a ported Ex port went 248 cfm, 224 @ .500" not too shabby. ALMOST 200 cfm @ .400"....

198.4

Posted By: MR_P_BODY

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 03:08 AM

W8, what grit rolls do you use as your finish
for the intake and for the exhaust?

Posted By: RyanJ

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 03:32 AM

Quote:

W8, what grit rolls do you use as your finish
for the intake and for the exhaust?

60 for intakes, I roll them slow for the final surface finish right before I clean the heads for assembly. And the exhaust I roll faster with a 120...... and chambers are a semi slow roll 80 grit.....My camera is not good at showing the "true" surface finish, the flash is a PITA. The best I can get is in natural sunlight (actually more like natural light with the sun behind a cloud) But I'm usually taking pics at night in the shop, and so I have to have the flash on, or artificial light..... The finish looks finer in the pics than it does in person.

Posted By: StrokerPost

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 04:47 AM

Although you've talked me out of going with the Eddy's it would be interesting to see the #'s on a set of Eddy's before you started doing the 22* back cut, side by side to see where the change occured and how much. Is that do-able? These #'s really look good!

Posted By: RyanJ

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 04:53 AM

I flowed these heads with the 22* BC valves before porting, and I have #'s from several other sets of E heads I have done that just had stock edelbrock valves.....both as cast and ported... not sure what you want to see?

Posted By: StrokerPost

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 05:00 AM

In ported form, to see the diff. between those and the #'s you just put up earlier with the 22* back cut. I'm assuming these were ported #'s you put up. Said another way, A comparison between a full on set with stock Eddy valves and a full on set with the 22* cut.

Posted By: B3422W5

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 01:53 PM

interesting numbers on the eddies ryan.......that is nearly the same curve mine ended up with after matt hensley got done with them using a 2.05 intake valve.i didnt run a real gigh lift cam(575)as you know,and with 260 intake duration the heads worked really well on my old motor.....those were 274.9 at 500 with a 30 cut.......but at 600 they were still at 274 or so...........then started falling off......for a street strip mill.i think what you did there is gonna be the most beneficial to making good power......

question........any way a set of those has any chance to ever see 300 cfm.......dont think its ever happened(except on hughes bench lol)!!!

Posted By: AdamR

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 03:33 PM

Ryan whey do you feel the best bang for the buck small block street head is ?
I'll be doing a mild 340 for a driver. Cam will be in the 225-230 range with an LD340 intake , headers ,10 converter and 3.55 gears.

I was thinking of trying the R/T heads.

Posted By: urdustd

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 03:47 PM

Hey...Nothing useless about the SB Edelbrocks!j/k
Can you post the out of the box, out of box with backcut, previous ported flow (stock e-valves)and the ported backcut flow side by side?
I want to get mine done, but it can't happen till next spring. Cars impounded...actually in storage, won't see it again until the end of April

It sucks, but I sure hate scrapping windows on the daily driver and the wife won't give up her stall in the garage!

Posted By: BBR

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 03:48 PM

Let me guess....

Iron: Magnum R/T
Aluminum: MP Large Port Commando
Cheap Aluminum: Edelbrock

All of the above *should* be ported by Ryan J for max performance.

Those new Edelbrock Aluminum Mags sould be interesting....

Posted By: Kam*Kuda

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 03:51 PM

Boy, that pretty. Nice, I would also like to see a comparison versus stock if at all possible.
Any compromises when you port these heads?

Posted By: Streetwize

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 04:04 PM

Those are very good numbers, about perfect for a small (.525 or so) street solid. I was looking at me Trick Flow Small Block Ford head flows a while back, yours are right with them up to .400, but at .450 and .550 the TF's go to 281 and 302. It's got to be in the port approach angle, these Fords are pretty steep. Different benches of course.

Posted By: RyanJ

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 09:19 PM

Quote:

In ported form, to see the diff. between those and the #'s you just put up earlier with the 22* back cut. I'm assuming these were ported #'s you put up. Said another way, A comparison between a full on set with stock Eddy valves and a full on set with the 22* cut.

First off: Best bang for the buck SB head out there today: 2.02" Magnum R/T bar NONE. That being said, it is iron, and there are guys out there who think if it's not Aluminum, that it is junk. But I'm not one of them so, there is my opinion.

Ok....... you wanted to see flow #'s from E heads... Well prepare yourselves. Here we go:

I'm just going to post intake #'s just to keep my sanity (somewhat)

First up, E heads I did earlier this year for Coke Bottle Kid:

LIFT---AS CAST----STAGE1-----STAGE2
.100"--63.8-------63.8-------65.6
.200"--124.2------127.7------135.2
.300"--178.7------185.3------197.7
.400"--208.4------217.4------233.2
.450"--218.0------232.9------245.0
.500"--227.0------241.5------255.3
.550"--231.8------245.0------265.7
.600"--235.3------252.5------274.6
.650"--238.1------258.8------279.1
.700"--239.8------265.7------283.9

All those tests doen with stock E brock valve, no BC's
The Stage 2 job was'nt MAX effort, but it was close.

Here's a set I did from TN:

LIFT---ASCAST---STAGE2
.100"--62.1-----61.6
.200"--123.5----135.5
.300"--177.7----195.4
.400"--208.7----234.0
.450"--225.1----246.6
.500"--241.5----256.3
.550"--244.9----264.7
.600"--248.4----258.7
.650"--248.4----258.7

I did'nt push the short turn hard enough on this set. Again straight 45* no BC.

Here's a set that I did not port, these were done by a shop in GA. And Dwayne did the VJ and 30* back cut the valves. This is the set that is for sale on ebay right now. Owner is getting rid of them to get some INDY 360-1's for a 416, and I listed them for him after flowing them. I would consider these Stage 2 port work. The porter pushed the pushrod pinches hard enough to break through on 2 of them, and Dwayne sleeved them.

LIFT--EBROCKFORSALE
.100"--70.7
.200"--131.8
.300"--189.8
.400"--233.9
.450"--252.2
.500"--269.1
.550"--272.9
.600"--260.2

And finally here is the Ebrocks I just finished, with an out of the box port, but a 22* BC valve. I was a dumbass and was'nt thinking, and BC the valves before flowing the head as cast, so I don't have #'s on these heads with the stock valves right out of the box

The #'s are so much better than the other as cast heads that I have flowed, that I would assume alot has to do with the 22* cut. Also I have to say that these had a very nice VJ on them, as they were used off of a Dirt track car, and this was not the Ebrock VJ that I am used to seeing. So #'s are kind of distorted....

LIFT-----AS CAST W/22*
.100"--74.2
.200"--138.7
.300"--193.2
.400"--232.8
.450"--242.5
.500"--247.7
.550"--253.6 (Bad turbulence)
.600"--250.5
.650"--246.3
.700"--246.3

Also note, all the other out of the box E heads kept pulling to .700", but the BC prevents that on this set. You do sacrifice high lift with this back cut, no doubt about that.

Posted By: 440Jim

Re: More Useless SB Edelbrock Flow #'s........ - 11/06/03 10:07 PM

Ryan,
What have you seen as the general effect of no-back cut on the valve, 30�, and now 22�?

Posted By: fast68plymouth

Re: More Useless SB Edelbrock Flow #'s........ - 11/07/03 03:26 AM

Quote:

Here's a set that I did not port, these were done by a shop in GA. And Dwayne did the VJ and 30* back cut the valves. This is the set that is for sale on ebay right now. Owner is getting rid of them to get some INDY 360-1's for a 416, and I listed them for him after flowing them. I would consider these Stage 2 port work. The porter pushed the pushrod pinches hard enough to break through on 2 of them, and Dwayne sleeved them.

thats not exactly correct.

the place that did the head work originally must have had pretty poor/old tooling.
the valves had been refaced with a valve grinder with a worn out chuck, and the faces werent even close to being concentric with the stems.
this shop had also spent a fair amount of time doing some kind of re-profiling of the back side of the valve.
sort of like a back cut, but then blended into the seat/back of the valve.
the actual face was also very narrow.
the seat work wasnt all that great either, so i touched up the valve seats, and refaced the valves.....but i dont recall doing anything additional in the way of a back cut on top of what had been done previously(although it was a while ago, and i might have).

i guess i just wanted to point out that the valves in those heads arent exactly like what you'd get with a normal Ebrock valve with a standard back cut done to it.

Posted By: RyanJ

Re: More Useless SB Edelbrock Flow #'s........ - 11/07/03 03:43 AM

Quote:

Quote:

Here's a set that I did not port, these were done by a shop in GA. And Dwayne did the VJ and 30* back cut the valves. This is the set that is for sale on ebay right now. Owner is getting rid of them to get some INDY 360-1's for a 416, and I listed them for him after flowing them. I would consider these Stage 2 port work. The porter pushed the pushrod pinches hard enough to break through on 2 of them, and Dwayne sleeved them.

thats not exactly correct.

the place that did the head work originally must have had pretty poor/old tooling.
the valves had been refaced with a valve grinder with a worn out chuck, and the faces werent even close to being concentric with the stems.
this shop had also spent a fair amount of time doing some kind of re-profiling of the back side of the valve.
sort of like a back cut, but then blended into the seat/back of the valve.
the actual face was also very narrow.
the seat work wasnt all that great either, so i touched up the valve seats, and refaced the valves.....but i dont recall doing anything additional in the way of a back cut on top of what had been done previously.
the only reason i mention all this is i dont want who ever buys them to look at what was done to the back side of the valves and think that was something i did.

LOL I was actually going to send you a PM about that when I first saw the valves last week. It almost looks like they did a 30* BC and then took a damn sand roll and tried to break the hard edge and radius to the seat. It's weird looking. You can see the sand roll marks if you look VERY close. I did'nt know if you did that or what......I guess the best way to describe it, is it looks just like a Ferrea "P" series valve that has a radiused 30. I just figured you must have done it, as I never would have guessed those clowns in GA would have, as is obvious that they spent a considerable amount of time messing with the backsides of those valves.

Posted By: fast68plymouth

Re: More Useless SB Edelbrock Flow #'s........ - 11/07/03 04:01 AM

Quote:

as is obvious that they spent a considerable amount of time messing with the backsides of those valves.

i think they did it to get back some of the low lift flow they lost by making the bowls as big as they did.
the way the heads were when i got them, there was basically no bottom cut under the 45* seat angle.
it was pretty much a 45, and then into the bowl.
that usually kills the low lift flow....but many times reworking the backside of the valve the way they did will get some of it back.