L92 heads off, AFR 230 V2 heads on, 504rwhp 6.0L automatic!
09-06-2010, 11:42 PM
#1
L92 heads off, AFR 230 V2 heads on, 504rwhp 6.0L automatic! I am so happy, you can't even believe it. Ever since the L92 heads came out, a lot of people think that a cathedral port head can't keep up. I didn't believe it and neither did Tony Mamo from Airflow Research (AFR). I own a 2009 Pontiac G8 with a 6.0L L76 engine. With ARH 1 7/8" headers, FAST 102 intake, Yella Terra 1.85 rockers, ASP 25% UD pulley, and Vararam CAI, the G8 made 397rwhp/395rwtq. This was one of the higher dynoing bolt-on 6.0L G8s. Most 6.0L G8s make in the 420-440rwhp range with bolt ons and a 230/238 cam. The highest number I've seen for a 6.0L G8 automatic has been 470rwhp and this one had ported L92 heads.
Tony Mamo and I decided to go "old school" and take off the Gen IV L92 heads and install a set of AFRs brand new 230 V2 heads. We called this our "Back to the Future Project". I had these heads milled to 65cc chamber so they matched the cc volume of an LS2 head (11.0:1 SCR). Then Tony Mamo did one of his famous porting jobs on a cathedral port FAST 102 intake. We used a fairly mild 231/231 .617/.617" 114LSA +2 advance Comp LSL cam. The gains were staggering: 504rwhp/440rwtq. A gain of 107rwhp/45rwtq. Keep in mind, this is through a locked-up automatic. Most people think that there is little to be gained over L92 heads, but thanks to the huge flow numbers and high airspeed of the AFR 230 and the "mamofied" FAST 102, substantial gains can be had.
There is still more power to be gained with a 102mm throttle body and larger airbox as we were pulling 5-6 kPa vacuum at WOT. Stay tuned for more details on the "Back to the Future Project". There's another 10-15rwhp to be gained with reducing inlet restrictions.
Tony Mamo and I decided to go "old school" and take off the Gen IV L92 heads and install a set of AFRs brand new 230 V2 heads. We called this our "Back to the Future Project". I had these heads milled to 65cc chamber so they matched the cc volume of an LS2 head (11.0:1 SCR). Then Tony Mamo did one of his famous porting jobs on a cathedral port FAST 102 intake. We used a fairly mild 231/231 .617/.617" 114LSA +2 advance Comp LSL cam. The gains were staggering: 504rwhp/440rwtq. A gain of 107rwhp/45rwtq. Keep in mind, this is through a locked-up automatic. Most people think that there is little to be gained over L92 heads, but thanks to the huge flow numbers and high airspeed of the AFR 230 and the "mamofied" FAST 102, substantial gains can be had.
There is still more power to be gained with a 102mm throttle body and larger airbox as we were pulling 5-6 kPa vacuum at WOT. Stay tuned for more details on the "Back to the Future Project". There's another 10-15rwhp to be gained with reducing inlet restrictions.
__________________
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
Last edited by Patrick G; 09-07-2010 at 12:12 AM.
09-07-2010, 12:03 AM
#4
Man....Ive always been dying to use that icon.....LOL
Insert "DYNO GRAPH" instead of "pics" however and that sums it up for me!
I just got a text from Pat and quickly saw this post.
I have to say both of us were hoping for 475 RWHP (thru the A4 trans of course).
I didn't share this with Pat but after the recent showing with the 417 I just built and dyno tested with the same heads, I was secretly hoping we might see 485 - 490 RWHP but didn't know if that was truly possible with an automatic trans in the picture.
Can I call BS??.....LOL
Damn.....cant wait to see the dyno curve!
Nice job Pat.....who I credit with the perfect nickname for this project btw.
We started discussing this a long time ago thinking 215's but after recently completing all the R&D on the new 230 I changed my mind at the last minute knowing he was coming out of a 260 cc head....even the 230 would be plenty "crisp" on the street.
Looking forward to the rest of the data!
-Tony
09-07-2010, 12:07 AM
#5
Here's a You Tube video of the dyno pull:
http://www.youtube.com/watch?v=IZBy3TT9QQg
http://www.youtube.com/watch?v=IZBy3TT9QQg
__________________
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
Trending Topics
09-07-2010, 06:55 AM
#11
Stock iridium plugs with stock gap.
No, actually I am using stock LS2 1.7 ratio rockers. My stock L92 rockers would not work because of the offset on the intake rockers and the 1.85 ratio of my Yella Terras would have made my net lift .671".
Stock LS1/LS2 rockers for me.
No, actually I am using stock LS2 1.7 ratio rockers. My stock L92 rockers would not work because of the offset on the intake rockers and the 1.85 ratio of my Yella Terras would have made my net lift .671".
Stock LS1/LS2 rockers for me.
__________________
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
09-07-2010, 08:06 AM
#13
__________________
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
09-07-2010, 08:08 AM
#14
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Congrats Patrick! Those numbers are huge! I am suprised how much the AFR heads helped over the highly touted Ls3 heads!
Those are close to being Supercharger HP gains or a 100 shot of laughing gas..
What mufflers you going to go with now?
Those are close to being Supercharger HP gains or a 100 shot of laughing gas..
What mufflers you going to go with now?
09-07-2010, 09:09 AM
#16
__________________
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
Custom LSX tuning in person or via email press here.
09-07-2010, 09:34 AM
#17
TECH Apprentice
Join Date: Nov 2001
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Thanks Brooke. Yes, the gains surprised even me. I'm going to enjoy the combo for a while, then maybe add some nitrous. I still don't have enough power to keep up with your supercharged Benz. We'll have some good comparisons at the Texas Mile since we'll both be running. About the quietest free flowing axle back mufflers I seen are the SLP Powerflos. I may run those or I may have Kurt build me something custom.
How about using the C6 Muffler set up on your car? Lot of those laying around.
09-07-2010, 09:52 AM
#19
With ARH 1 7/8" headers, FAST 102 intake, Yella Terra 1.85 rockers, ASP 25% UD pulley, and Vararam CAI, the G8 made 397rwhp/395rwtq. This was one of the higher dynoing bolt-on 6.0L G8s. Most 6.0L G8s make in the 420-440rwhp range with bolt ons and a 230/238 cam. The highest number I've seen for a 6.0L G8 automatic has been 470rwhp and this one had ported L92 heads. A gain of 107rwhp/45rwtq.
Just curious how much of it you think are in the heads alone? Considering you went from stock heads to AFR's and gained roughly 20-30hp from the heads considering most people gain 60-70 from the cam, maybe 10 from the LSXR. Wonder what the gain is over ported and decked L92's? Maybe 10-15hp?
What do you think of the MAST Black Label heads... similar gains?
