G-Force 205CC AFR Head Flow #'s Inside!
08-11-2004, 05:02 PM
#22
TECH Regular
Join Date: Aug 2003
Location: Berkley, MI
Posts: 414
Likes: 0
Received 0 Likes
on
0 Posts
Have to measure deck height varience, then flycut, then figure what gasket and pray it does not knock. I believe LGM is distributing AFR's with a 59cc.
I was looking at a 62cc and cometics for a safe 11:1.
I was looking at a 62cc and cometics for a safe 11:1.
08-11-2004, 05:06 PM
#23
Staging Lane
Join Date: Dec 2002
Location: Houston - Clear Lake
Posts: 90
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Mike TexaSS
Funny Trey hows the car running?
Not bad for what it is.
I have some questions, I'll give you a call tomorrow at the shop.
08-11-2004, 05:55 PM
#24
Flow numbers look good, but I'm surprised the numbers at .300" and .400" aren't stronger. I've seen Craig's 5.3L ports flow better than that at 3 and 4. As you stated though, it's his first set. Well done.
__________________
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.
08-11-2004, 06:45 PM
#25
If Craig got the heads as a bare casting, then why would they flow anymore or less than any of his other LS-x based castings? It's not going to flow more just because it is a AFR casting. Were these the porters speacial head? Started life at 170cc's? I just can't quite comprehend why this head would flow so much more with such a small volume as compared to his other stuff???
08-11-2004, 07:49 PM
#26
They should flow more for a given cc volume because of the extra meat in the roof of the port. Being able to port a nice raised roof runner should make superior flow numbers to GM heads with limited thickness in the runner's roof.
__________________
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.
, got any of the bowl area? 
08-12-2004, 09:53 PM
#31
TECH Enthusiast
Join Date: Feb 2002
Location: Native Texan
Posts: 540
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Beast96Z
If Craig got the heads as a bare casting, then why would they flow anymore or less than any of his other LS-x based castings? It's not going to flow more just because it is a AFR casting. Were these the porters speacial head? Started life at 170cc's? I just can't quite comprehend why this head would flow so much more with such a small volume as compared to his other stuff???
Look at this way. If you took a SBC factory head like a Vortec and ported it then then took a World Products Iron S/R Torquer it would take a different technique to get the best out of each head even though they are both designed for the same engine.
AFR tried to improve upon the LSX series cylinder heads and the casting ARE different. The AFR have thicker decks and more material in the port in as to get the correct shape (not just larger) in order to make the most efficent port and make the most power.
Aftermarket cylinder heads and factory heads are apples and oranges. GM tries to build the build the most relaible product with the least amout of overhead, where AFR wants the most performance per dollar invested.
Later,
Bart
08-12-2004, 09:59 PM
#32
TECH Junkie
Thread Starter
Join Date: Aug 2002
Location: Fort Collins, CO
Posts: 3,726
Likes: 0
Received 0 Likes
on
0 Posts
Originally Posted by Speedfreaks101
Look at this way. If you took a SBC factory head like a Vortec and ported it then then took a World Products Iron S/R Torquer it would take a different technique to get the best out of each head even though they are both designed for the same engine.
AFR tried to improve upon the LSX series cylinder heads and the casting ARE different. The AFR have thicker decks and more material in the port in as to get the correct shape (not just larger) in order to make the most efficent port and make the most power.
Aftermarket cylinder heads and factory heads are apples and oranges. GM tries to build the build the most relaible product with the least amout of overhead, where AFR wants the most performance per dollar invested.
Later,
Bart
AFR tried to improve upon the LSX series cylinder heads and the casting ARE different. The AFR have thicker decks and more material in the port in as to get the correct shape (not just larger) in order to make the most efficent port and make the most power.
Aftermarket cylinder heads and factory heads are apples and oranges. GM tries to build the build the most relaible product with the least amout of overhead, where AFR wants the most performance per dollar invested.
Later,
Bart
