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. :cheers:

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! :cheers:

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 :devil:

"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

Livernois had some great heads for a good price.
3 hp less than afrs and made 4 more tq.

awsome value.

Thats funny, the online article has this noted about the AFR 205 heads

Have any insight on what they're referring to?

Brian, is that the way the heads are shipped to customers?

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?????

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. :eyes:

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.

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?

I've heard Tony Mamo say something to the effect that they do some chamber work that better suits the 4" bore (stuff to eliminate the valve shrouding I'm sure).

Congratulations Brian, Was the cnc program based off of this set of heads?

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

They did a great job on those heads but I'm not so sure they are a great value at $1900 for a stock casting. I paid $2189 shipped for my AFR 205's.

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.

No etp's? That sucks.

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.

great read :)

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.

Quoted for truth.

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.

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.