Stage 2 cnc ported 243's
Thread Starter
Pro
Joined: Dec 2013
Posts: 709
Likes: 12
From: Grand Falls Newfoundland
The heads are going on a ls2 with a fast 102 intake, kooks 1 3/4 headers with off road x pipe no cats. 25% ud pulley. New corsa exhaust, k&n cai, all new valve train including timing chain, lifters, pushrods rocker trunion kit etc etc. also installing a 231/239 .617/.624 113 lsa cam and tune!!!! So what kind of ho with this setup do you think the stage 2 heads will make???
Pro
Joined: Sep 2012
Posts: 651
Likes: 3
From: Gambrills MD
well all things considered i'm thinking about 450-465 whp. but "Stage 2" heads mean very little. Not all stage 2's are considered equal. but i think my estimate would be accurate with "most" heads that people would consider stage 2.
Thread Starter
Pro
Joined: Dec 2013
Posts: 709
Likes: 12
From: Grand Falls Newfoundland
Thanks but that's not what I'm talking about. I'm asking how much power the actual heads contribute. Not the overall hp but the heads. Like 15rwhp or 30wrhp. What is your guess. What overall power does the heads make not the combined engine parts.
Thread Starter
Pro
Joined: Dec 2013
Posts: 709
Likes: 12
From: Grand Falls Newfoundland
The heads are going on a ls2 with a fast 102 intake, kooks 1 3/4 headers with off road x pipe no cats. 25% ud pulley. New corsa exhaust, k&n cai, all new valve train including timing chain, lifters, pushrods rocker trunion kit etc etc. also installing a 231/239 .617/.624 113 lsa cam and tune!!!! So what kind of ho with this setup do you think the stage 2 heads will make???
Race Director
Joined: Mar 2005
Posts: 11,549
Likes: 27
From: Southampton NJ
The heads are going on a ls2 with a fast 102 intake, kooks 1 3/4 headers with off road x pipe no cats. 25% ud pulley. New corsa exhaust, k&n cai, all new valve train including timing chain, lifters, pushrods rocker trunion kit etc etc. also installing a 231/239 .617/.624 113 lsa cam and tune!!!! So what kind of ho with this setup do you think the stage 2 heads will make???
Melting Slicks
Joined: Nov 2009
Posts: 2,536
Likes: 15
25 on the low side
And as much as 50+ on the high side.
Really depends on your level of detail and overall build.
(Chamber size, custom seat work, hand blended SSR, rolled angle, valve size, valve weight, quench pad, plug landing, total quench...etc..etc)
Just because it says "stage 2" does not mean you/they can't spend a little extra time cleaning up the details.
Good luck with your project...
And as much as 50+ on the high side.
Really depends on your level of detail and overall build.
(Chamber size, custom seat work, hand blended SSR, rolled angle, valve size, valve weight, quench pad, plug landing, total quench...etc..etc)
Just because it says "stage 2" does not mean you/they can't spend a little extra time cleaning up the details.
Good luck with your project...
Last edited by LSOHOLIC; Aug 17, 2014 at 11:01 PM.
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Thread Starter
Pro
Joined: Dec 2013
Posts: 709
Likes: 12
From: Grand Falls Newfoundland
25 on the low side
And as much as 50+ on the high side.
Really depends on your level of detail and overall build.
(Chamber size, custom seat work, hand blended SSR, rolled angle, valve size, valve weight, quench pad, plug landing, total quench...etc..etc)
Just because it says "stage 2" does not mean you/they can't spend a little extra time cleaning up the details.
Good luck with your project...
And as much as 50+ on the high side.
Really depends on your level of detail and overall build.
(Chamber size, custom seat work, hand blended SSR, rolled angle, valve size, valve weight, quench pad, plug landing, total quench...etc..etc)
Just because it says "stage 2" does not mean you/they can't spend a little extra time cleaning up the details.
Good luck with your project...
Former Vendor
Joined: Oct 2006
Posts: 278
Likes: 17
From: Auburn/Dacula/Lawrenceville Georgia
A properly done up set of 243 castings can gain as much as 50rwhp with the right camshaft & tuning. Advanced Induction does all of our stock GM casting CNC work and we see a consistent 40-55rwhp gain out of ALL their CNC programs. This even includes the 241 castings. We've done several back to back tests on cam only cars that acquired a set of these heads and all the results are pretty consistent.
Side note: Hopefully you've got a very good tuner with that camshaft and a NW102 throttle body.
Side note: Hopefully you've got a very good tuner with that camshaft and a NW102 throttle body.
Thread Starter
Pro
Joined: Dec 2013
Posts: 709
Likes: 12
From: Grand Falls Newfoundland
A properly done up set of 243 castings can gain as much as 50rwhp with the right camshaft & tuning. Advanced Induction does all of our stock GM casting CNC work and we see a consistent 40-55rwhp gain out of ALL their CNC programs. This even includes the 241 castings. We've done several back to back tests on cam only cars that acquired a set of these heads and all the results are pretty consistent.
Side note: Hopefully you've got a very good tuner with that camshaft and a NW102 throttle body.
Side note: Hopefully you've got a very good tuner with that camshaft and a NW102 throttle body.