Head Suggestions for Lightweight LS2 402ci Stroker
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
If you got it.. let it hang
or as Katt Williiams would say: Working with monster..
Every1 has a goal. GM makes it EASY 2 get what ever your goal is...with FACTORY parts. So the aftermarket would be overkill and not budget friendly...
or as Katt Williiams would say: Working with monster..
Every1 has a goal. GM makes it EASY 2 get what ever your goal is...with FACTORY parts. So the aftermarket would be overkill and not budget friendly...
Last edited by lil john; Jul 13, 2014 at 11:02 AM.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Sent an email to Ed. I'm thinking of nixing the stock ported LS3 head. I just don't see throttle tip-in being there like it is with a cathedral.
I'm thinking at this point the small bore LS3's with the 240cc runner would be the ticket if I went with square ports. But they'd have to be optimized for a 4" bore. THOSE I could see still having some grunt in the low end and keeping up up top.
TFS 235's, or Chris Franks custom CNC'd TFS for Cathedral.
AFR's I'm thinking of steering clear of simply bc of the valve angle. I think I got lucky with my 205's @ 59cc with the HellRaiser cam (229/236 .631.631 112+2)
I'm thinking at this point the small bore LS3's with the 240cc runner would be the ticket if I went with square ports. But they'd have to be optimized for a 4" bore. THOSE I could see still having some grunt in the low end and keeping up up top.
TFS 235's, or Chris Franks custom CNC'd TFS for Cathedral.
AFR's I'm thinking of steering clear of simply bc of the valve angle. I think I got lucky with my 205's @ 59cc with the HellRaiser cam (229/236 .631.631 112+2)
Sent an email to Ed. I'm thinking of nixing the stock ported LS3 head. I just don't see throttle tip-in being there like it is with a cathedral.
I'm thinking at this point the small bore LS3's with the 240cc runner would be the ticket if I went with square ports. But they'd have to be optimized for a 4" bore. THOSE I could see still having some grunt in the low end and keeping up up top.
TFS 235's, or Chris Franks custom CNC'd TFS for Cathedral.
AFR's I'm thinking of steering clear of simply bc of the valve angle. I think I got lucky with my 205's @ 59cc with the HellRaiser cam (229/236 .631.631 112+2)
I'm thinking at this point the small bore LS3's with the 240cc runner would be the ticket if I went with square ports. But they'd have to be optimized for a 4" bore. THOSE I could see still having some grunt in the low end and keeping up up top.
TFS 235's, or Chris Franks custom CNC'd TFS for Cathedral.
AFR's I'm thinking of steering clear of simply bc of the valve angle. I think I got lucky with my 205's @ 59cc with the HellRaiser cam (229/236 .631.631 112+2)
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
ETP (gone), RPM, and RHS are the only companies that come to mind that ever did a SB LS7...? Is that right?
The RHS look promising, but the exhaust valve is a 1.575... Seems small to me, but I do have 1 7/8 Tri Y headers... Wonder how that works into the equation. But they're 266cc
The RHS look promising, but the exhaust valve is a 1.575... Seems small to me, but I do have 1 7/8 Tri Y headers... Wonder how that works into the equation. But they're 266cc
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
Ha! Just emailed Dr J about some small bore LS7's...
http://www.j-performance.com/index.p...ask=view&id=52
As for the RHS, the cheapest I could find was around 1200 each
The 54503's
Still don't know what the valve angle is on either head.
http://www.j-performance.com/index.p...ask=view&id=52
As for the RHS, the cheapest I could find was around 1200 each
The 54503's
Still don't know what the valve angle is on either head.
Ha! Just emailed Dr J about some small bore LS7's...
http://www.j-performance.com/index.p...ask=view&id=52
As for the RHS, the cheapest I could find was around 1200 each
The 54503's
Still don't know what the valve angle is on either head.
http://www.j-performance.com/index.p...ask=view&id=52
As for the RHS, the cheapest I could find was around 1200 each
The 54503's
Still don't know what the valve angle is on either head.
The TEA TFS LS3s do look good... but the intake manifold... eh.
For a 402, I still think Cathedral port can do the job. Once you move to a 4.125" bore I'd bypass the LS3s and go straight to LS7. The LS3s are beastly head/cam but I've never seen them put away a cathedral port head once you throw stroke and bore at a cathedral port head. You can overcam the cathedral port stuff to make up for any advantage of the LS3.
The Chris Frank TFS heads, ported FAST 102, and a 402 would be 550rwhp all day with a 248/254 type of cam. Add more compression and some tricks on setting up the valve train and I think 575-580 would be possible.
For a 402, I still think Cathedral port can do the job. Once you move to a 4.125" bore I'd bypass the LS3s and go straight to LS7. The LS3s are beastly head/cam but I've never seen them put away a cathedral port head once you throw stroke and bore at a cathedral port head. You can overcam the cathedral port stuff to make up for any advantage of the LS3.
The Chris Frank TFS heads, ported FAST 102, and a 402 would be 550rwhp all day with a 248/254 type of cam. Add more compression and some tricks on setting up the valve train and I think 575-580 would be possible.
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Joined: Mar 2013
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From: Studewood/Acres-Homes TX.
Did you all read that Frankenstien yellow bullet post about the 408 Hyd roller with a FAST intake... 697 hp with stage1 LS3 heads. Try that with the Cathedral port without some crazy cam & compression..
How much RWHP would 690fwhp add up to?
How much RWHP would 690fwhp add up to?
Last edited by lil john; Jul 13, 2014 at 03:44 PM.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
I also did send Chris an email on Friday so I'll wait to hear back from him and what he has to say.
I think for myself at this point, I'd like to run a small bore LS7, if for nothing more than to just keep the theme with the LS7 internals and all. But then again that's me... thinking. I'll wait to hear back from Dr J's, Frankenstein, and Ed.
Even thought about cheating a bit with a short travel lifter and a solid roller cam, but I'm unsure if the polymer intake would even support it.
I think for myself at this point, I'd like to run a small bore LS7, if for nothing more than to just keep the theme with the LS7 internals and all. But then again that's me... thinking. I'll wait to hear back from Dr J's, Frankenstein, and Ed.
Even thought about cheating a bit with a short travel lifter and a solid roller cam, but I'm unsure if the polymer intake would even support it.
Probably in the 580-590 range depending on the driveline. Point is, he has cathedral ports with 600rwhp too. So meh.
Yeah somehow I don't see OEM castings hitting 600rwhp regardless who worked them unless running some crazy compression and RPMs.
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
Redtan remember I got the Vic Jr. intake and a solid roller.. I am sure that i will put up more than the 408 hyd. roller with these heads..
I got the same basic set-up as the 757hp @ 7500rpm 414ls with stage 2 heads ... I got the stage1 heads
his cam was 257/268 dur. & .730 something lift with a Compression ratio of I think 11.5
While my cam checks in @ 256/270dur. & 757 lift
think 600rwhp is that far away now with factory heads.
I got the same basic set-up as the 757hp @ 7500rpm 414ls with stage 2 heads ... I got the stage1 heads
his cam was 257/268 dur. & .730 something lift with a Compression ratio of I think 11.5
While my cam checks in @ 256/270dur. & 757 lift
think 600rwhp is that far away now with factory heads.
Last edited by lil john; Jul 13, 2014 at 08:25 PM.
Thread Starter
Joined: Apr 2009
Posts: 6,717
Likes: 24
From: Lafayette, LA
At least 800 bucks.
Good news. Received an email from Chris today and we've been trading back and forth.
I'm going with his heads, definitely.
After talking, this is what he came up with, and I'm fully on board.
Chris Frank of Frankenstein Racing Heads - "On the 4.0 bore we would use a 2.100-2.125 intake valve and a 1.59-1.60 exhaust valve. The intake port will be around 245cc-250cc. The valve angle will be 12* with a 60cc chamber or smaller. It will be a RHS casting for sure with some BTR springs."
Good news. Received an email from Chris today and we've been trading back and forth.
I'm going with his heads, definitely.
After talking, this is what he came up with, and I'm fully on board.
Chris Frank of Frankenstein Racing Heads - "On the 4.0 bore we would use a 2.100-2.125 intake valve and a 1.59-1.60 exhaust valve. The intake port will be around 245cc-250cc. The valve angle will be 12* with a 60cc chamber or smaller. It will be a RHS casting for sure with some BTR springs."
At least 800 bucks.
Good news. Received an email from Chris today and we've been trading back and forth.
I'm going with his heads, definitely.
After talking, this is what he came up with, and I'm fully on board.
Chris Frank of Frankenstein Racing Heads - "On the 4.0 bore we would use a 2.100-2.125 intake valve and a 1.59-1.60 exhaust valve. The intake port will be around 245cc-250cc. The valve angle will be 12* with a 60cc chamber or smaller. It will be a RHS casting for sure with some BTR springs."
Good news. Received an email from Chris today and we've been trading back and forth.
I'm going with his heads, definitely.
After talking, this is what he came up with, and I'm fully on board.
Chris Frank of Frankenstein Racing Heads - "On the 4.0 bore we would use a 2.100-2.125 intake valve and a 1.59-1.60 exhaust valve. The intake port will be around 245cc-250cc. The valve angle will be 12* with a 60cc chamber or smaller. It will be a RHS casting for sure with some BTR springs."
Banned
Joined: Mar 2013
Posts: 1,137
Likes: 2
From: Studewood/Acres-Homes TX.
Good deal.... 4 Cnc & shipping was 1200.oo for these
The work done was worth it... I got the page 4 your heads done by Chris..
Pro Elite LS7 raised runner casting.... on yellow bullet forums...
The work done was worth it... I got the page 4 your heads done by Chris..
Pro Elite LS7 raised runner casting.... on yellow bullet forums...
The TEA TFS LS3s do look good... but the intake manifold... eh.
For a 402, I still think Cathedral port can do the job. Once you move to a 4.125" bore I'd bypass the LS3s and go straight to LS7. The LS3s are beastly head/cam but I've never seen them put away a cathedral port head once you throw stroke and bore at a cathedral port head. You can overcam the cathedral port stuff to make up for any advantage of the LS3.
The Chris Frank TFS heads, ported FAST 102, and a 402 would be 550rwhp all day with a 248/254 type of cam. Add more compression and some tricks on setting up the valve train and I think 575-580 would be possible.
For a 402, I still think Cathedral port can do the job. Once you move to a 4.125" bore I'd bypass the LS3s and go straight to LS7. The LS3s are beastly head/cam but I've never seen them put away a cathedral port head once you throw stroke and bore at a cathedral port head. You can overcam the cathedral port stuff to make up for any advantage of the LS3.
The Chris Frank TFS heads, ported FAST 102, and a 402 would be 550rwhp all day with a 248/254 type of cam. Add more compression and some tricks on setting up the valve train and I think 575-580 would be possible.
I also did send Chris an email on Friday so I'll wait to hear back from him and what he has to say.
I think for myself at this point, I'd like to run a small bore LS7, if for nothing more than to just keep the theme with the LS7 internals and all. But then again that's me... thinking. I'll wait to hear back from Dr J's, Frankenstein, and Ed.
Even thought about cheating a bit with a short travel lifter and a solid roller cam, but I'm unsure if the polymer intake would even support it.
I think for myself at this point, I'd like to run a small bore LS7, if for nothing more than to just keep the theme with the LS7 internals and all. But then again that's me... thinking. I'll wait to hear back from Dr J's, Frankenstein, and Ed.
Even thought about cheating a bit with a short travel lifter and a solid roller cam, but I'm unsure if the polymer intake would even support it.
At least 800 bucks.
Good news. Received an email from Chris today and we've been trading back and forth.
I'm going with his heads, definitely.
After talking, this is what he came up with, and I'm fully on board.
Chris Frank of Frankenstein Racing Heads - "On the 4.0 bore we would use a 2.100-2.125 intake valve and a 1.59-1.60 exhaust valve. The intake port will be around 245cc-250cc. The valve angle will be 12* with a 60cc chamber or smaller. It will be a RHS casting for sure with some BTR springs."
Good news. Received an email from Chris today and we've been trading back and forth.
I'm going with his heads, definitely.
After talking, this is what he came up with, and I'm fully on board.
Chris Frank of Frankenstein Racing Heads - "On the 4.0 bore we would use a 2.100-2.125 intake valve and a 1.59-1.60 exhaust valve. The intake port will be around 245cc-250cc. The valve angle will be 12* with a 60cc chamber or smaller. It will be a RHS casting for sure with some BTR springs."