GMHTP LS2 Head Shootout!!
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FormerVendor
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From: Bardstown, KY
GMHTP LS2 Head Shootout!! Looks like the TFS heads out powered the competition in an independent dyno test. 
Although the writer Dr Jamie Meyer pointed out that it was not a true heads up dyno thrash, it does give you some idea of the potential of the TFS heads.
It is a very good article and a good read.
http://www.gmhightechperformance.com...ads/index.html
Although the writer Dr Jamie Meyer pointed out that it was not a true heads up dyno thrash, it does give you some idea of the potential of the TFS heads.
It is a very good article and a good read.
http://www.gmhightechperformance.com...ads/index.html
Congrats on the victory!
The hand finished (according to the article) 64cc TFS 215cc heads came out on top over all cylinder heads including a narrow win over the box-stock AFR 205 heads in unmilled 66cc form. Competition breeds product advancement. Can't wait to see the state of the art a year from now!
The hand finished (according to the article) 64cc TFS 215cc heads came out on top over all cylinder heads including a narrow win over the box-stock AFR 205 heads in unmilled 66cc form. Competition breeds product advancement. Can't wait to see the state of the art a year from now!
__________________
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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From: Somewhere I Belong
A tons of valuable info. of late model's cylinder heads that many of us have been looking for and needless to say the competition was on the edge between the incredible AFR's and the outstanding TFS's 
"Trick Flow engineers determined that the valve angles needed to change from 15 to 13.5 degrees. This change decreased valve shrouding, increased mid-lift airflow, and increased rocker arm-to-valve cover rail clearance"
very interesting article & thanks for sharing Brian
peace
"Trick Flow engineers determined that the valve angles needed to change from 15 to 13.5 degrees. This change decreased valve shrouding, increased mid-lift airflow, and increased rocker arm-to-valve cover rail clearance"
very interesting article & thanks for sharing Brian
peace
11 Second Club
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From: Albuquerque NM - The Land of 8000ft DA
Originally Posted by Patrick G
Congrats on the victory!
The hand finished (according to the article) 64cc TFS 215cc heads came out on top over all cylinder heads including a narrow win over the box-stock AFR 205 heads in unmilled 66cc form. Competition breeds product advancement. Can't wait to see the state of the art a year from now!
The hand finished (according to the article) 64cc TFS 215cc heads came out on top over all cylinder heads including a narrow win over the box-stock AFR 205 heads in unmilled 66cc form. Competition breeds product advancement. Can't wait to see the state of the art a year from now!
Thats funny, the online article has this noted about the AFR 205 heads
prepared for this test to run on an LS2 engine
Brian, is that the way the heads are shipped to customers?
Last edited by sscam68; Oct 31, 2006 at 12:54 PM.
it seems that TFS may of re done a head for this,if so i don't think the consumer will get the same product,(i could be wrong,but may not be)he did say it took some time to get the tfs product,more time for them to hand finis for better results?????
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From: Plano, Tx.
Strange, AFR did not send GMHTP a set of 225 heads for a LS2 4" bore setup.
The AFR 225 probably would have come out above or close to these "Worked" TFS 215 heads, even though the TFS heads were hand-finished after the CNC porting which gives them an unfair advantage.
Hey Brian, how about sending some actual production heads to a dyno test next time and not hand-finishing them. 
And why didn't you send some Trickflow 225 unless they weren't available at the time.
Good info in that article, I just wish AFR 225 and (not hand-finished, just regular CNC production heads) TFS 225 were used for a more equal comparison.
The AFR 225 probably would have come out above or close to these "Worked" TFS 215 heads, even though the TFS heads were hand-finished after the CNC porting which gives them an unfair advantage.
Originally Posted by Brian Tooley
Looks like the TFS heads out powered the competition in an independent dyno test.
And why didn't you send some Trickflow 225 unless they weren't available at the time.
Good info in that article, I just wish AFR 225 and (not hand-finished, just regular CNC production heads) TFS 225 were used for a more equal comparison.
Last edited by Cobraeater; Oct 31, 2006 at 04:31 PM.
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From: NJ
HAHA I love how the magazine notes that it called out several head shops and some bitched out..
That shows me the shops who are afraid to go up against the big boys. Right now, AFR and TFS make the best quality heads hands down. so why go anywhere else?
The call went out to several of the top cylinder head manufacturing companies: "GM High-Tech Performance magazine is doing a head shootout on an LS2. Do you want in?" Some shops said no, some never returned our phone calls, but most companies wanted to get in the show.
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Originally Posted by sscam68
Have any insight on what they're referring to?
My favorite quote from that article:
However, next time around we’ll be looking at the killer new L92 heads and L76 intake that GM Performance Parts has coming out for the LS family of engines. Stay tuned LS lovers, we’ve got a lot of cool stuff coming your way.
Nate
However, next time around we’ll be looking at the killer new L92 heads and L76 intake that GM Performance Parts has coming out for the LS family of engines. Stay tuned LS lovers, we’ve got a lot of cool stuff coming your way.
Nate
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Originally Posted by vince3
Livernois had some great heads for a good price.
3 hp less than afrs and made 4 more tq.
awsome value.
3 hp less than afrs and made 4 more tq.
awsome value.
The horsepower differences were small for all the heads. I would clean up a set of stock ls6 heads and put the $ 1500 I saved into other power producing mods. To brag about a $ 2200 dollar head making 3 to 10 more hp than other heads misses the point for 90 % of us who mod our engines.
All depends on what your after Chuck. IMO a set of ported LS6 heads or Dart 205 with a 90/90 will out shine a AFR/TF/ETP and a LS6 with stock TB any day.
But a set of TF's/AFR's/ETP's with a 90/90 is a serious combo.
I always hear people say something like. "There is no way I would spend 1000 dollars for 10-15 HP" Then you notice in their sig they have a 800 dollars fast 90 mm manifold and a 400 dollar TB. So they were right they didn't spend 1000 for 10-15HP they spend 1200 dollars.
But a set of TF's/AFR's/ETP's with a 90/90 is a serious combo.
I always hear people say something like. "There is no way I would spend 1000 dollars for 10-15 HP" Then you notice in their sig they have a 800 dollars fast 90 mm manifold and a 400 dollar TB. So they were right they didn't spend 1000 for 10-15HP they spend 1200 dollars.
Teching In
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TFS is the best head out there. I don't see any low super low end torque numbers either for AFR heads although they had the advantage of smaller runners 205 Vs 215.
i know that AFR had less compression i would assume less by .3 - .4 compression ratio and also trying to compensate for that by using a general rule of that an increase of 1 point in compression ratio = and increase of 4% in power. well that said i think the low end AFR thing is all hype.
well if you found out that trickflow was hand blended then look at this
"Of special note, we did run the AFR head richer and leaner at the request of AFR" They didn't do that to all the heads.
well i don't know about TFS heads but if all thair heads are hand blended then that would be really nice. i just hope they didn't blend those heads for the test.
Brian nice job on those heads and can't wait to see results of 225cc heads.
i know that AFR had less compression i would assume less by .3 - .4 compression ratio and also trying to compensate for that by using a general rule of that an increase of 1 point in compression ratio = and increase of 4% in power. well that said i think the low end AFR thing is all hype.
well if you found out that trickflow was hand blended then look at this
"Of special note, we did run the AFR head richer and leaner at the request of AFR" They didn't do that to all the heads.
well i don't know about TFS heads but if all thair heads are hand blended then that would be really nice. i just hope they didn't blend those heads for the test.
Brian nice job on those heads and can't wait to see results of 225cc heads.
Originally Posted by JZ'sTA
All depends on what your after Chuck. IMO a set of ported LS6 heads or Dart 205 with a 90/90 will out shine a AFR/TF/ETP and a LS6 with stock TB any day.
But a set of TF's/AFR's/ETP's with a 90/90 is a serious combo.
I always hear people say something like. "There is no way I would spend 1000 dollars for 10-15 HP" Then you notice in their sig they have a 800 dollars fast 90 mm manifold and a 400 dollar TB. So they were right they didn't spend 1000 for 10-15HP they spend 1200 dollars.
But a set of TF's/AFR's/ETP's with a 90/90 is a serious combo.
I always hear people say something like. "There is no way I would spend 1000 dollars for 10-15 HP" Then you notice in their sig they have a 800 dollars fast 90 mm manifold and a 400 dollar TB. So they were right they didn't spend 1000 for 10-15HP they spend 1200 dollars.
Another good way of looking at it is that you are not only paying $1500 when swapping heads and cam if you buy a $1500 H/C combo. Think of all of the supporting parts, labor, time, tuning, fuel system upgrades, etc etc etc.
When you start adding up the dough, labor, and time invested, spending a bit extra to get the top of the line heads seems more than worth it.
Originally Posted by Brian Tooley
Looks like the TFS heads out powered the competition in an independent dyno test.
Although the writer Dr Jamie Meyer pointed out that it was not a true heads up dyno thrash, it does give you some idea of the potential of the TFS heads.
It is a very good article and a good read.
http://www.gmhightechperformance.com...ads/index.html
Although the writer Dr Jamie Meyer pointed out that it was not a true heads up dyno thrash, it does give you some idea of the potential of the TFS heads.
It is a very good article and a good read.
http://www.gmhightechperformance.com...ads/index.html
Congrats....... now get yours hands dirty with some L92 stuff!
I can hear it now "TEA L92's with optional nitrous exhaust port BLOWS AWAY the competition"
Nice article. After reading it and seeing the results, it just goes to show just how good of a head AFR's are. I would have liked to seen a non-ringer set of TFS heads used though.