Flow numbers would likely be higher on the Superflow bench, right? Really interesting. It would be great to see you port the “as cast” 363 heads you mentioned and compare to the factory CNC job on these. Requires having the other heads though… Somebody out there with a 582 or 598 need some heads? Buy them from Weingartner Racing, please!
On pump fuel, minimum 850. Those inches require rpm to make 900+ and regardless of what flow number it has, the 366 isn't big enough to feed it up there, out of the box. The 380 version does, over 7,000. Do these all the time.
...Can you mount the head, when the flywheel cuts across the deck it drop the valve seat material into the combustion chamber instead dragging across the remaining deck?
Not really. The cutter head is normally spinning at somewhere between 700 and 1400 rpm (those are the two speeds my surfacer has) and the head has to be rigidly mounted to give a good surface finish. The small amount of discoloration that occurs has no effect and I can’t think of a way to prevent it.
Only way to fix that is to drop the seats lower, or raise them into the chamber, however you want to look at it. That in itself does more harm than good and would be no need to do it since what he is showing you does NO harm to anything. Nature of the beast.
@@davidreed6070 The seat angle, or 45 should be at the highest spot on the valve, but .010" off the margin. Intake seats in a performance application should be roughly .040" wide. That differs with application. You can then cut a back angle to within .010" of the bottom of the seat. Some valves can get away with 2 nback cuts depending on the width and design of the valve.
@@jrdmotorsports9718 unfortunately when I ordered my pistons they said they work with the 395s but they will not they don't have valve pockets for the moved centerline head hunters
@@jasonradle7076 Move them. We do it all the time. Don't limit yourself or power potential. Locate the center of the valve, set the angle and plunge cut the radial, set the cutter for a .120" larger cut than the valve size. Just like a standard valve notch. You won't lose any more than a cc at most in over all dome volume, if that. Have had to do it with brand new pistons also. Hope this helps.
Would you recommend this head for a 90% street 10% strip Tall Deck 572, single plane holley EFI intake, 1350 cfm throttle body, E85, ~13.5:1, .750" roller, TH400 9.5" converter, 4.10 gear, 29x10 slick in a 3100 lb Ford Ranger?
Hey Eric, how do I tell what heads I have? I'm unsure if they're BB2/BB3 Extra heads, none of the serial numbers really show up on google either. I also tried emailing your business email in regards to an intake manifold, but it keeps bouncing back. Cheers
How's rectangle closed Chambers 219cc 188 exh ported for 13:5:1 Compression natural exsp motor still looking for manifold super victor ll rectangle and carb nitro plate stage ll
They are fine, just depends on how many inches you are building. A 468 would be perfect. A 496 i would go up to a 2.250" valve. Watch the dome profile with closed chamber stuff. JE makes a nice closed chamber dome, however spark plug indexing becomes the norm. Good luck.
Another great informative video that helps people understand the details that make a difference. Your teaching background really shows up!
Thank you Eric for your excellent review!! I watch and enjoy all of them and appreciate your knowledge!
I had a set of these with oval ports. Good stuff! Eric, have you worked the oval ports?
I am curious to know your thoughts on the 380cc version on this head.
Thanks for video!
Great videos! Have you ever ported stock Gen 6 454 (96-99) heads? I'm trying to figure out what to do with the big lumps in the intake bowls..
Flow numbers would likely be higher on the Superflow bench, right? Really interesting. It would be great to see you port the “as cast” 363 heads you mentioned and compare to the factory CNC job on these. Requires having the other heads though… Somebody out there with a 582 or 598 need some heads? Buy them from Weingartner Racing, please!
Nice work as always Eric. What sort of power on pump fuel, big camshaft on the 582 are these heads capable of supporting ? 900+
On pump fuel, minimum 850. Those inches require rpm to make 900+ and regardless of what flow number it has, the 366 isn't big enough to feed it up there, out of the box. The 380 version does, over 7,000. Do these all the time.
Amazing, thank for the information share
...Can you mount the head, when the flywheel cuts across the deck it drop the valve seat material into the combustion chamber instead dragging across the remaining deck?
Not really. The cutter head is normally spinning at somewhere between 700 and 1400 rpm (those are the two speeds my surfacer has) and the head has to be rigidly mounted to give a good surface finish.
The small amount of discoloration that occurs has no effect and I can’t think of a way to prevent it.
Only way to fix that is to drop the seats lower, or raise them into the chamber, however you want to look at it. That in itself does more harm than good and would be no need to do it since what he is showing you does NO harm to anything. Nature of the beast.
Great video. What is your opinion on the head deck texture, smooth or textured? I've heard both ideas. Let us know.
Smoother the better with MLS, a slower cut that leaves the lines would need a soft gasket, like standard Fel Pro.
@@jrdmotorsports9718 thanks for the reply.
@@paulhalbleib9286 🤘
Eric when you backcut your in valves, how close does the backcut come to the 45.
The same amount as what it is off the margin. .010"
@@jrdmotorsports9718 I see, thank you
So the 45 is centered between the margin and the back cut
010 each way.
@@davidreed6070 The seat angle, or 45 should be at the highest spot on the valve, but .010" off the margin. Intake seats in a performance application should be roughly .040" wide. That differs with application. You can then cut a back angle to within .010" of the bottom of the seat. Some valves can get away with 2 nback cuts depending on the width and design of the valve.
What should rocker studs be torqued to on a 20 year old canfield sbf head
7/16 ARP, 60 is fine. Standard stud, 50 is ok. 3/8 Arp 45, standard stud 40 is fine.
Do you do any work on the brodix head hunter 383 standard centerline? I am looking for a set for my 632
For a 632, you may want to look at the 395HH.
@@jrdmotorsports9718 unfortunately when I ordered my pistons they said they work with the 395s but they will not they don't have valve pockets for the moved centerline head hunters
@@jasonradle7076 Move them. We do it all the time. Don't limit yourself or power potential. Locate the center of the valve, set the angle and plunge cut the radial, set the cutter for a .120" larger cut than the valve size. Just like a standard valve notch. You won't lose any more than a cc at most in over all dome volume, if that. Have had to do it with brand new pistons also. Hope this helps.
Would you recommend this head for a 90% street 10% strip Tall Deck 572, single plane holley EFI intake, 1350 cfm throttle body, E85, ~13.5:1, .750" roller, TH400 9.5" converter, 4.10 gear, 29x10 slick in a 3100 lb Ford Ranger?
These would be right at home on what you're doing.
Hey Eric, how do I tell what heads I have? I'm unsure if they're BB2/BB3 Extra heads, none of the serial numbers really show up on google either.
I also tried emailing your business email in regards to an intake manifold, but it keeps bouncing back.
Cheers
Eric have you flowed any LPC BBC heads?
That’s the same head as the Afr enforcer head. I did a video over that head.
How's rectangle closed Chambers 219cc 188 exh ported for 13:5:1 Compression natural exsp motor still looking for manifold super victor ll rectangle and carb nitro plate stage ll
They are fine, just depends on how many inches you are building. A 468 would be perfect. A 496 i would go up to a 2.250" valve. Watch the dome profile with closed chamber stuff. JE makes a nice closed chamber dome, however spark plug indexing becomes the norm. Good luck.
So companies out here false advertising numbers