Hey Mike, don't hold back, tell him how you feel. JK

 

Now you're going to hell for sure....

 

Im not taking nothing away from TFS. For an out of the box bolt on head for a 346 they work great...I wouldnt use them on a big motor and definitely not one in a custom application. For a street head out of the box, they flat out make power if you take the precautions.

 

Please tell me what you end up with iam also looking for a something similiar for my C5 Z06 427+ that can produce 550 rwhp on pump and take a 150 shot of NOS.

 

I have not steered him in any direction, however, I can say that the TFS heads should make more power on a hyd roller cam, pump gas 414 than any Dart head made. For that matter more than any 15 degree head made. We port Dart heads, we have Dart heads running 7's on Mikes turbo car. The TFS heads in place of the Darts would make even more power, they have a stronger chamber due to relocating the spark plug away from the seats, which is important on a turbo car, just ask Kurt at W2W. The TFS heads also have a more efficient chamber in general.

The TFS heads do not require "shaft mount" roller rockers, they do require "any" type of roller rocker arms, and if you had any idea of the amount of testing that TFS has performed, then you would also know that the roller rocker is the only way to go on any type of aftermarket head.

I don't know where you are getting your misinformation from, I hope it's not the same place as the 18cfm TFS 215 gain from "changing one thing", cause I know what happened there better than you do, and the head did get hurt significantly before this "one thing" happened.

If you have someone who can get a Dart head to flow more than 280 @ .400" then you may have a head that will make more power than the TFS 225's, but I would like to see it with my own eyes first, cause the best we have seen from anything else is 270 @ .400" If you said you had a ET 11 degree head that would outpower the TFS heads, then you would have a more believable story.

The AFR, Dart and other heads we do would generally make consistent 510-520 RWHP on 402-408 engines, with pump gas compression and a smallish hyd roller cam. This new TFS 225 head makes consistent 540-550 RWHP on the same setup's, backed up by numerous dyno shops.

If you would like to know that truth about many things feel free to PM or call me.

 

Have any results of the 215 TFS heads on a 383 yet Brian? I've seen plenty of stock cube results, but no 383 numbers.

 

Don't all head porters lose cfm when they touch new materials? Thats what R&D is for. Bottom line here seems to be that you guys claim they cant be picked up and you arent denying the fact that they weren't. Regardless of what happened before they are up 18 over the baseline out of the box numbers. Clarification is needed.

 

Did you mean beardWS6's ETP 245cc that are flowing 291cfm @ .400" lift?

https://ls1tech.com/forums/generation-iv-internal-engine/659257-et-245-s-flow-down-low-pics.html

 

I have Dart heads!!

 

So you're saying put these heads on a 408" engine, you will make 700 HP on pump gas? If so, I'll buy a set today!... Then I'll "engine Dyno" the motor and post the results... You just tell me what cam you want me to run and the desired static C/R... Deal?

 

You may be able to do it BUT ask your self do you want a car that works for a few weeks months???? not streetabl or something that your can drive for years to come making good pwr 475 - 500 safely???

 

So you're saying that the TFS will make more power than any 15 degree head, but if that's true why are the ETP's with even a smaller valve angle of 11 degrees making less power than your TFS 13.5 degree heads on the 215cc and 225cc size heads.

 

where did you get that info? god there's a ton of BS out there abotu what heads are making what for power LOL.

 

Valve angle plays an important role at .400 lift. the advantage will go to the TFS heads for sure though. Where exactly did that casting originate from anyway before it was tweaked? Was it come up with on your own or copied from an existing cylinder head?

Are you saying that a mildly ported set of L92s vs your out of the box TFS 225's didnt make more power on a recent dyno? Something to the effect of ~50 ft lbs more torque...That tells me the power is there but its in the tuning to find the rest of it to match the torque numbers.

Im not taking nothing away from the TFS...Those are BADDDD mothas. But for a year worth of R&D vs a day on the mildly ported L92s and they make a pretty good amount more torque. Im saving $1000 and going with some more reasonable to make the same power.

 

From dyno results and flowsheets posted on ls1tech. It looks like the TFS are making about 5-10hp more than the ETP's.

How many ls1's have hit 500rwhp with ETP 215's, when the ETP first came out Andy at A@A was posting up a 480rwhp ls1 and 500rwhp ls2s which isn't exactly ground breaking anymore and was right in line with what AFR heads have achieved on a few occasions.

How many times have AFR and ETP hit 500rwhp compared to the TFS.

I guess you think the ETP's make the most power, but where are the results then. The ETP heads have been out since late 2005.

BTW. I'm talking about the ETP 215 and 225cc heads only.

And other than Miami's 511rwhp ETP 215cc car, name another example.

 

The heads WERE NOT PICKED UP 18 CFM FROM BASE LINE NUMBERS. The heads were worked on, lost a good bit of flow, and then one area was massaged and got 18cfm back.

The ET heads had issues that kept them from making the power, the extra weight of the .550” longer than stock valves for one.

I don't know where you came up with 700HP, but us and TFS have numerous customers that make around 550 RWHP power.

TFS has their own casting, that they designed and made, and has their name on it, and only TFS has it. You can buy it from Summit, TFS and any TFS dealer.

I don't know what you are talking about here. Do you have the dyno data handy?


Can you get a set of L92 heads ported to make close to the power of the TFS heads complete with springs for $1400?

 

BRIAN/TEA

Set you a pm about buying complete top end package regarding TRS 225, rockers, intake, etc., etc., for a 427 LS7 shortblock. Looking forward to hearing back from you bro and enjoy the EASTER HOLIDAY!

 

I'll bite... I sent you a email. I'll try a set. <(Install them on a 402" engine and engine dyno & chassis dyno it)... Where I'm from a Mustang Dynos has at least a 20% drive trail loss and a Super Flow 901 engine dyno will back up that percentage... But Hey...Maybe you're right and this is the best set of heads out there... But it's gotta be a pump gas, hydraulic cam, stock style intake manifold with a 90mm T/B... No sheet metal intakes...

 

I believe there must be more to this story. No way you're going to get on AFR by 48 rwhp.

Disclaimer: I'm not "picking" on you Brian, I'm just disagreeing. So there's no need to PM me about this post or to call any of our mutual friends to whine about it.

 

one occasion where i agree with ole Hutto 100%!!!! Jerm.... take his advice!

Jerm.... dont spend all that extra cash if it is not worth the gains. There are other things you can do to the car with the money and get better benifit... such as improving the suspension, EWP, Nitrous, Intake changes etc etc etc..... save your cash, get a well ported L92 setup with a good intake or Dart setup and be done with it. You dont need shaft rockers to make good power. If you want shafts..... just go with a solid roller and use the truck as a daily.