LS2 with AFR 225 heads
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Joined: Nov 2001
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From: Raleigh, NC
Originally Posted by beardWS6
Good Question! If so, what are you getting out of the set-up!
TECH Resident
Joined: Dec 2004
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ET Heads has a ported version which seems...from their specs...to be stronger. They posted 4.0 bore 240cc that seemed to be stronger than their LS6 and 5.3 heads.
Of course, flow comparisons between testers are nebulous.
Of course, flow comparisons between testers are nebulous.
I'm having AFRs put on my LS2/C6 tomorrow(Thurs) along with the Cheatr cam. I'll post the results soon as the car is finished.... Opps... Just realized you were looking for 225s..... Mine will be 205s
Last edited by xstang; Aug 3, 2005 at 09:17 AM.
Seems to me like LG put 225s on their project C6...They did not post results. They went out of their way to advertise that the car made 460RWHP on stock heads with a big G%x cam, TAST manifold, LG LTs,... Then promised to post resuilts of the 225s...Not the car is for sale and is making 480 RWHP with the head in tact. I think they did not make as much power as expected (~20 RWHP). Either the stock LS2 heads are really good, or the 225s are overkill on the 6L.
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DEN- as I understand it, yes. But that's what makes the AFR 205's as impressive as they are... because they flow like a lot of 225-230cc heads, but do so with a smaller port... meaning that the air/fuel charge is at higher velocity, which results in a more complete cylinder fill. However, once motor (cylinder) size gets big, or RPMs get high, the bigger port offers less restriction and CAN (though not necessarily WILL) make more power.
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Thread Starter
On The Tree
Joined: May 2004
Posts: 104
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From: Denver CO.
I plan to go to a stroke kit in the future but want to improve the performance of the stock setup. I also live in Denver at high altitude. I'd like to run AFR 225s with a moderate cam. I know the 205s work well but want something I can use when I upgrade the bottom end.
I saw the C6 numbers, but they didn't post a dyno chart and can't tell if the low end was hurt by the larger heads.
I was hoping someone had already tried this.
I saw the C6 numbers, but they didn't post a dyno chart and can't tell if the low end was hurt by the larger heads.
I was hoping someone had already tried this.
I plan to go to a stroke kit in the future but want to improve the performance of the stock setup. I also live in Denver at high altitude. I'd like to run AFR 225s with a moderate cam. I know the 205s work well but want something I can use when I upgrade the bottom end.
I saw the C6 numbers, but they didn't post a dyno chart and can't tell if the low end was hurt by the larger heads.
I was hoping someone had already tried this.
I saw the C6 numbers, but they didn't post a dyno chart and can't tell if the low end was hurt by the larger heads.
I was hoping someone had already tried this.
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Joined: Sep 2003
Posts: 848
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From: Working in the shop 24/7
Get the AFR 225 heads set up with the correct valvetrain for your application. Have no fear. I've got a project car with a set of small bore 225 heads on an LS1 and it's strong as hell. Cammed correctly. 
They aren't too big of a cross section for a stock LS2 engine...
They aren't too big of a cross section for a stock LS2 engine... 
Keep in mind the AFR's have that bronze valve-guide and will still need the roller rocker to help in most applications with the guide wear. Also, the TFS heads do have the thicker deck that you want. I also prefer the TFS heads over the AFR's.
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Largest Stocking Distributor of LS-x Engines / CHECK OUT OUR NEW WEBSITE!
COMP - FAST - PACESETTER - DIAMOND RACING - EAGLE SPECIALTY PRODUCTS - CALLIES - COMETIC GASKETS
RAM CLUTCHES - MOSER ENGINEERING - KOOK'S HEADERS - ARP - GM BOLTS AND GASKETS - MSD - NGK
POWERBOND - ASP - AND MORE!
