Sent you pics Elysian. It can be done, it's just a matter of talent. As the other thread that goes into detail about port volume states, it's not the cc's but the cross section that really counts.

Denny on the coatings isssue, where you see it is in consistency on the dyno. I've seen back to back to back dyno pulls that keep the numbers up rather than falling off fast on coated engines vs. non coated engines. Oil temps increase, H2O temps increase and the motor gets heat soaked. The point here is that you are going to see more HP with putting the money someplace else first, LIKE THE HEAD WORK as Larry says.

BTW 4 average at that point is a nice gain.


Bret

 

I'd love to get a set of this new TFS heads. I currently have a set of AFR190cc.
However, I'm hesitant to go ahead and pull the trigger on this move, until I see some prove of somebody actually achieving the flow numbers already talked about on this thread.
I've heard of TFS having fixed the initial flaw on the thickness of the ports. I want somebody to "show me" actual porting that reflect 300cfm. I just can't go on potential only. I'll be happy if somebody can get 285-290 @ .550 or so out of them...
-Goose

 

Put some 227's on it and forget it.It will make more HP and torque with them.(more head-less cam)
Don't waste your money on coatings unless you have a trailer queen and looking for the last 100th,its not worth the cost on a street/strip engine.
Spend your money on the top end ie.heads,cam,intake and TB-CAI

 

The 290-295 cfm and 240+ @ .400 using the Trick Flow 2.02 valves came from a pretty good source whom I trust. This person has no reason to say anything otherwise as he just ports them and doesn’t sell heads. I’m also sure Brent is on the money as he may be using a different porter.

I’ve had two different sets of stage III LT4 heads with 2.02 valves and 206 and 208 cc intakes independently bench flowed and both flowed 283-284 cfm max and 235 cfm @ .400. Both heads had an average flow of 185 cfm to .600. Again, this was the best LT4's two different shops had to offer.

The 10 extra cfm or so over the LT4’s is worth something for sure (about 20 hp I believe). However, considering the smaller 2.02 valves in the Trick Flow heads, does the extra 10-15 cfm from the larger AFR 2.08 valves make any more power????

Sure someone like Larry or Brent knows the math behind this can decipher the real impact. All I know is Performance Trends software likes smaller valves with less flow vs larger valves and a bit more flow.

You know all about inquiring minds.

 

If you were to have a set of TFS heads to be ported to achieve those numbers, who would you give them to?
PM me if you don't want to answer that question here.
One more thing, what ever happened to Craig Gallant from GTP?
I still think he's one of the best porters in the Country, is he not?
Goose

 

I consider Craig to be a friend and in fact bought a cam from him this spring. For all I know he still has his business (GTP) in Houston. I’m personally very sorry to hear a few on this list have had problems with his heads as he really is a nice person. Nice wife, nice shop, etc, etc. Kinda a combination of dumbfounded and disappointed when I heard the reports.

One of the sets of LT4 heads I flowed came from Craig. He told me they flowed 283 and on Kim Barr’s flow bench, that’s exactly what they flowed. The other set of LT4 heads came from a pretty highly regarded vendor on this list (whom I won’t mention) that were suppose to flow just below 300 cfm. On Lloyd Elliots bench, they flowed 284 max.

 

You know IF i was going to have a set ported like that I might look to a guy posting in this thread who already has a set of TFS heads flowing the numbers posted

Regardles of what Max is preaching I still continue to use coatings. N2O seems to like Coatings more then detonation

BUT that is just me and I am not an expert just a stupid parts buyer

 

WRT coatings: for us street and street/strip enthusiasts I think the same as Bret. They are of the most use on forced induction (or nitrous) motor on the piston crowns. They will keep the piston temps down under boost and therefore provide some protection. Probably worth a few hp as well, I don't doubt. But I wouldn't way they are worth ~$200 for the hp gain unless you have done everything else first. If max hp is to be gained from coating at least the crowns and the exhaust valve face should be coated, and probably the combustion chamber face and intake valve while you are at it as well. How much gain? I am sure the tests have been done, though I have never seen them.

Rich