AFR Heads
AFR Heads a cam (238/242 .608/.610 115LSA) only C5Z06 with full boltons, alum. flywheel, U/D pulley, FAST 90/ported LS2 90 making 438rwhp 397rwtq, how much more would it gain from switching from the stock ls6 heads to AFR 205s??? AFR 225s?
will a AFR 225 head make more power than a AFR 205 head??
what's the difference between the heads?
will a AFR 225 head make more power than a AFR 205 head??
what's the difference between the heads?
Gains depend somewhat on your final compression ratio. Since compression is your friend, especially with a cam of that size, I'd recommend a 59cc combustion chamber size and a .040" Cometic gasket. This will put your compression in the 11.5:1 range.
If you do this, you should expect 35-40 rwhp gain over LS6 heads with either the AFR 205s or small bore 225s. I've swapped from AFR 205s to AFR small bore 225s and I'm here to tell you that the gains would be very small if you're running a 3.900" bore. The 225s shine on 4.0" bore sizes and larger. My recommendation? Run the AFR 205s in the 59cc size and look for a nice jump in power AND torque...plus you'll get better throttle response and fuel economy over your stock LS6 heads.
If you do this, you should expect 35-40 rwhp gain over LS6 heads with either the AFR 205s or small bore 225s. I've swapped from AFR 205s to AFR small bore 225s and I'm here to tell you that the gains would be very small if you're running a 3.900" bore. The 225s shine on 4.0" bore sizes and larger. My recommendation? Run the AFR 205s in the 59cc size and look for a nice jump in power AND torque...plus you'll get better throttle response and fuel economy over your stock LS6 heads.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
Originally Posted by Patrick G
Gains depend somewhat on your final compression ratio. Since compression is your friend, especially with a cam of that size, I'd recommend a 59cc combustion chamber size and a .040" Cometic gasket. This will put your compression in the 11.5:1 range.
If you do this, you should expect 35-40 rwhp gain over LS6 heads with either the AFR 205s or small bore 225s. I've swapped from AFR 205s to AFR small bore 225s and I'm here to tell you that the gains would be very small if you're running a 3.900" bore. The 225s shine on 4.0" bore sizes and larger. My recommendation? Run the AFR 205s in the 59cc size and look for a nice jump in power AND torque...plus you'll get better throttle response and fuel economy over your stock LS6 heads.
If you do this, you should expect 35-40 rwhp gain over LS6 heads with either the AFR 205s or small bore 225s. I've swapped from AFR 205s to AFR small bore 225s and I'm here to tell you that the gains would be very small if you're running a 3.900" bore. The 225s shine on 4.0" bore sizes and larger. My recommendation? Run the AFR 205s in the 59cc size and look for a nice jump in power AND torque...plus you'll get better throttle response and fuel economy over your stock LS6 heads.
with 59cc and 2.02/1.6 valves, won't flycutting be necessary with that cam?
Originally Posted by c5_ls1_6spd
with 59cc and 2.02/1.6 valves, won't flycutting be necessary with that cam?
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
TECH Resident
Joined: Jul 2005
Posts: 907
Likes: 1
From: NJ
Originally Posted by Patrick G
My recommendation? Run the AFR 205s in the 59cc size and look for a nice jump in power AND torque...plus you'll get better throttle response and fuel economy over your stock LS6 heads.
TECH Resident
Joined: Jul 2005
Posts: 907
Likes: 1
From: NJ
Originally Posted by Patrick G
Yes, you will need to flycut but if you're going to let fly-cutting stand in the way of getting an ideal combination, you're not that serious about doing what it takes to get there. Fly-cutting is necessary if you want to keep that huge cam. You could always run a smaller cam with better DCR and avoid fly-cutting.
I would imagine with that liftand duration hes not going to give up much hp with less CR.
Originally Posted by eamador11
But he can also mill less...say till 62cc no?
I would imagine with that liftand duration hes not going to give up much hp with less CR.
I would imagine with that liftand duration hes not going to give up much hp with less CR.
__________________
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2022 Cadillac Escalade 6.2L A10 S&B CAI, Corsa catback.
2023 Corvette 3LT Z51 soon to be modified.
Custom LSX tuning in person or via email press here.
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Originally Posted by Patrick G
Yes, you will need to flycut but if you're going to let fly-cutting stand in the way of getting an ideal combination, you're not that serious about doing what it takes to get there. Fly-cutting is necessary if you want to keep that huge cam. You could always run a smaller cam with better DCR and avoid fly-cutting.
The X4 is "bigger" in every respect than the cam posted here, on a much tighter LSA too.
I don't know who's right or wrong...but since I have an X4, I'd like to know myself. Supposedly the AFR's have more p/v clearance than stock heads, but I'm still skeptical.
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Originally Posted by Thimble
Louis @ LG mentioned in another thread, that even their G5X4 will work with 59cc AFR's and the .040 cometics and still not need flycutting.
The X4 is "bigger" in every respect than the cam posted here, on a much tighter LSA too.
I don't know who's right or wrong...but since I have an X4, I'd like to know myself. Supposedly the AFR's have more p/v clearance than stock heads, but I'm still skeptical.
The X4 is "bigger" in every respect than the cam posted here, on a much tighter LSA too.
I don't know who's right or wrong...but since I have an X4, I'd like to know myself. Supposedly the AFR's have more p/v clearance than stock heads, but I'm still skeptical.
