A friend of mine runs a NHRA legal Superstock 73 Super Duty 455 310hp factory rated Pontiac engine, it has a cam with right at an inch of lift. Original cast iron heads, altho there's been alot of magic performed on them, it makes 725+hp with its original Q-jet on a Victor intake. Turns 8200rpm thru the lights. It's in a 3rd gen firebird and runs low 9s in the 1/4. It's a monster. Biggest cam I've ever seen used in a Pontiac engine and I've built Pontiacs since 1984. NHRA Superstock engines are all cam and headwork. So flow figures at an inch of lift does apply to some folks. Most of the bigblock Chevy race engines I've built over the decades used cams in the .750 to .800 lift range.
Hey Eric I wanted to Apoligize about something about (I think a year ago) I commented on one of your past videos! I guess i was not paying attention to he whole video and i just realized that was YOUR video, it was about a head you bought with an oversized valve seat in one chamber. Man I feel like an a$$hat after watching almost all your videos now. I have learned a lot morewatching your videos then what I previously knew already about porting. Anyways I hope me clicking some of your video advertisments helps with some Ad Revenue pay through adsense.
how do these compare to ds320 i built a 468 fairly high compression bracket deal was getting ready to order some heads. may give you a call im in BA also.
Like most every manufacturer, they lie about their flow numbers. Eric's bench also flows a bit notoriously low. But no way these see 400cfm on anything but a very generous flow bench.
From Brodix's advertised flow numbers from .200"to .600" Lift compared to Eric's flow bench numbers---- that's a total of 275cfm difference... That's a HUGE DIFFERENCE !!! Not good 😮
Isn't it misleading to be quoting port cc given the amount of castings on the market for a given engine. Would it not be more accurate to be quoting the port cross sectional area where the area will more accurately dictate application ?
Eric , awesome rundown. We are a little bit spoilt that you go to the effort to make these videos. Thank you
A friend of mine runs a NHRA legal Superstock 73 Super Duty 455 310hp factory rated Pontiac engine, it has a cam with right at an inch of lift. Original cast iron heads, altho there's been alot of magic performed on them, it makes 725+hp with its original Q-jet on a Victor intake. Turns 8200rpm thru the lights. It's in a 3rd gen firebird and runs low 9s in the 1/4. It's a monster. Biggest cam I've ever seen used in a Pontiac engine and I've built Pontiacs since 1984. NHRA Superstock engines are all cam and headwork. So flow figures at an inch of lift does apply to some folks. Most of the bigblock Chevy race engines I've built over the decades used cams in the .750 to .800 lift range.
Thanks again, all the best to you and your loved ones
Hey Eric I wanted to Apoligize about something about (I think a year ago) I commented on one of your past videos! I guess i was not paying attention to he whole video and i just realized that was YOUR video, it was about a head you bought with an oversized valve seat in one chamber. Man I feel like an a$$hat after watching almost all your videos now. I have learned a lot morewatching your videos then what I previously knew already about porting. Anyways I hope me clicking some of your video advertisments helps with some Ad Revenue pay through adsense.
how do these compare to ds320 i built a 468 fairly high compression bracket deal was getting ready to order some heads. may give you a call im in BA also.
I haven’t flowed the ds heads yet but they are an older chamber design. They are cheaper than the 3xtra though.
Brodix claims the 327 runner flows 401 & 406 @ .600 & .700 lift. What's up with that?
Like most every manufacturer, they lie about their flow numbers. Eric's bench also flows a bit notoriously low. But no way these see 400cfm on anything but a very generous flow bench.
What would be the flow numbers on a 4.50 bore as most after market blocks come as 4.500
I don’t have a 4.5 bore plate. 4.60 is also Avery common aftermarket block bore.
What size engine would these be good on? I'm thinking they'd be good starting about 496 to about a 540?
He said a racy 496 and up
@@Comet-hn3gm ah, missed that part, thanks
I'd say a 496 that's going to see 7000-7500rpm. Up to a 540 that will see 6500-7000rpm.
do you know anything about the SUM-162112 heads? if not then it's okay
Hey have you ever done a test on summits vortec head SUM-151124 ?
No
From Brodix's advertised flow numbers from .200"to .600" Lift compared to Eric's flow bench numbers---- that's a total of 275cfm difference... That's a HUGE DIFFERENCE !!! Not good 😮
I think you read it wrong.
Isn't it misleading to be quoting port cc given the amount of castings on the market for a given engine. Would it not be more accurate to be quoting the port cross sectional area where the area will more accurately dictate application ?
Sure but that is how the head is labeled.
Is that price with or without valves.? Keep up the good work .
Did u listen?...he said assembled......
Thanks Tim , I must have missed that part .
@@derekshuster5995 all good my brother!!....PEACE to you sir!!
bahaha some do just not you. thats funny
Huh
Huh
@@WeingartnerRacing "no one has a 1 inch cam" then you said.....
1st