Bracket Talk
Cylinder Head Questions

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https://drr.infopop.cc/eve/forums/a/tpc/f/80760912/m/8827025596

February 10, 2021, 03:53 PM
Shabs
Cylinder Head Questions
Well, it's that time of the year again where we all try to make our junk run better, be more consistent, and hopefully more durable.

However when making a purchase as big as cylinder heads most of us have a lot of questions that are sometimes complicated to answer. That's where I'd like to be able to help.

What questions do you have about cylinder heads?


Mike@FrankensteinED.net
February 10, 2021, 03:59 PM
WHOMPWHOMP
Obviously you don’t know ED....
February 10, 2021, 04:01 PM
Shabs
I don't know Ed, but I know what Ed's probably gonna say.

Can't a guy have fun on here still?


Mike@FrankensteinED.net
February 10, 2021, 04:14 PM
rusty
just for grins as you say ,what is the head of choice for a 598 conventional head ,to make 1200 hp.i know this is real broad.just give me some thoughts


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

February 10, 2021, 04:16 PM
Shabs
quote:
Originally posted by rusty:
just for grins as you say ,what is the head of choice for a 598 conventional head ,to make 1200 hp.i know this is real broad.just give me some thoughts


Whell there's two types of 1,200 hp. You want 4.30 1,200hp or 4.70 1,200hp cause they ain't the same thing?


Mike@FrankensteinED.net
February 10, 2021, 04:19 PM
rusty
lol 4.30,1200 on the track not a loose dyno


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

February 10, 2021, 04:20 PM
Shabs
Go to a 615", good SR20's, heavily ported EDL-2897 or M&M Intake. You oughta know the rest.


Mike@FrankensteinED.net
February 10, 2021, 04:23 PM
rusty
thanks


honesty is the best policy,insanity is a better deffense
1.036, 6.16@ 224

February 10, 2021, 04:24 PM
TOP38
quote:
Originally posted by Shabs:
quote:
Originally posted by rusty:
just for grins as you say ,what is the head of choice for a 598 conventional head ,to make 1200 hp.i know this is real broad.just give me some thoughts


Whell there's two types of 1,200 hp. You want 4.30 1,200hp or 4.70 1,200hp cause they ain't the same thing?


This should be a good!!!!!!!!!!!!!!
February 10, 2021, 04:28 PM
Shabs
It can be done a couple different ways, but that's the easiest as far as getting parts. We've done a few AFR Magnum 18's here for 500" Truck Pulling stuff that makes just under 1,050. I'm ready to see 'em on a 615" and see what they do as they show more promise than our SR20 program.


Mike@FrankensteinED.net
February 10, 2021, 05:24 PM
70.5camaro
quote:
Originally posted by Shabs:
quote:
Originally posted by rusty:
just for grins as you say ,what is the head of choice for a 598 conventional head ,to make 1200 hp.i know this is real broad.just give me some thoughts


Whell there's two types of 1,200 hp. You want 4.30 1,200hp or 4.70 1,200hp cause they ain't the same thing?


Who’s gone 4.30 with 1200?? Or a sr20 615 going 4.30?? I’ve seen some fast sr20’s but not sure I’ve seen one go 4.30 HMMMM
February 10, 2021, 05:55 PM
Little Chief
Shabs you have a pm
February 10, 2021, 06:09 PM
BP758
quote:
Originally posted by Shabs:
Well, it's that time of the year again where we all try to make our junk run better, be more consistent, and hopefully more durable.

However when making a purchase as big as cylinder heads most of us have a lot of questions that are sometimes complicated to answer. That's where I'd like to be able to help.

What questions do you have about cylinder heads?





clapping


Raceless in California!
February 10, 2021, 06:31 PM
green1
Well beings it’s free, What’s a good head for a 548 ? I have Brodix BB2X Cnc ported by M2 right now but the heads need gone over and may just replace them. It does run good as is being 5.21 at 2600 lbs in 1/8 mile.
February 10, 2021, 09:43 PM
TD3550
I would take a 9** over a 20** everyday.
February 10, 2021, 10:44 PM
TOP38
quote:
Originally posted by 70.5camaro:
quote:
Originally posted by Shabs:
quote:
Originally posted by rusty:
just for grins as you say ,what is the head of choice for a 598 conventional head ,to make 1200 hp.i know this is real broad.just give me some thoughts


Whell there's two types of 1,200 hp. You want 4.30 1,200hp or 4.70 1,200hp cause they ain't the same thing?


Who’s gone 4.30 with 1200?? Or a sr20 615 going 4.30?? I’ve seen some fast sr20’s but not sure I’ve seen one go 4.30 HMMMM


An honest 1225HP at 1835 lbs goes 4.30 flat at 161+, 632CID Pro20 Dart heads, Eddy cast intake, big bubbas and 4.10 gears, little bubbas and 4.30 gears would be about .04 faster. Mid summer heat equal mid to high 30's.
February 10, 2021, 10:48 PM
TOP38
quote:
Originally posted by TD3550:
I would take a 9** over a 20** everyday.


They both have Pro's and cons! The bottom line is simple, how much power do you want to make? Answer that and the rest is easy.
February 11, 2021, 07:53 AM
NC3x58
Alright Shabs, I keep seeing people talk about square port vs oval port for alcohol on BBC's.. What head would you chose if building a 615-632 to run alky in a 1950lb dragster, wanting to run 4.50's in 2500' of air at 1100' elevation?

To me, I would think this is where the Brodix Headhunter 383 or something like the Profiler 375 shine.. But is something like the BB3 380 Rec. port a better option?


Nick Craig

1971 Camaro Split Bumper
376ci LS3
February 11, 2021, 07:57 AM
70.5camaro
quote:
Originally posted by TOP38:

An honest 1225HP at 1835 lbs goes 4.30 flat at 161+, 632CID Pro20 Dart heads, Eddy cast intake, big bubbas and 4.10 gears, little bubbas and 4.30 gears would be about .04 faster. Mid summer heat equal mid to high 30's.


That's badass and very impressive. There are a few 632 and 648 20 degree deals that fly, just doesn't seem like a big group of them though. I've had a 615 that made 1198 and it was never going a 4.30, high 30 maybe, but that's a long way from a 30 to me anyway.
February 11, 2021, 09:12 AM
Shabs
quote:
Originally posted by green1:
Well beings it’s free, What’s a good head for a 548 ? I have Brodix BB2X Cnc ported by M2 right now but the heads need gone over and may just replace them. It does run good as is being 5.21 at 2600 lbs in 1/8 mile.


BB3 Xtra's ain't a bad idea.


Mike@FrankensteinED.net