You're comparing a newly designed, fully CNC ported head with a stage 2 ported head that was designed over 20 years ago.
I would hope at least "some" progress has been made in that time.

You're also comparing flow numbers gleaned from different sources.
Those should never be considered truly "apples to apples".

The SR's start out advertised as 261cc.
At MW size, stage 2 ported, they are probably still only 270-275cc.

Fully CNC ported from Indy the SR's are 295cc, and are bigger than that from some other porting services.

A little refresher for Indy heads:

https://board.moparts.org/ubbthreads/ubbthreads.php/topics/1168215/1/indy-bb-head-data.html

Well yeah but these heads will probably be good for 750 hp on a pump gas 470 inch big block which is good enough for most of the bracket guys out there. Might not be the best design possible for a Mopar but they look like a very, very good bolt on type head.

[/quote]

You're comparing a newly designed, fully CNC ported head with a stage 2 ported head that was designed over 20 years ago.
I would hope at least "some" progress has been made in that time.

You're also comparing flow numbers gleaned from different sources.
Those should never be considered truly "apples to apples".

The SR's start out advertised as 261cc.
At MW size, stage 2 ported, they are probably still only 270-275cc.

Fully CNC ported from Indy the SR's are 295cc, and are bigger than that from some other porting services.

A little refresher for Indy heads:

https://board.moparts.org/ubbthreads/ubbthreads.php/topics/1168215/1/indy-bb-head-data.html [/quote]

Thank you Dwayne for all the information you share with us.

Wouldn't a cylinder head that delivered more exceed the limitations of stock production blocks anyways?

Thanks Dwayne a lot of good info!
I think mine does well with the heads you ported 765 hp on dyno and 9.08 146 @ the track @ 2850#s.

Don

Obviously, the TF 270 heads are too new to know just where the upper hp limit is for "easy" hp, but I kinda feel like the SR design might actually have more "potential" with it's taller floor and raised exhaust port.

Nonetheless, I'm sure the TF 270's will be flying off the shelves.

And Don, your motor is a good example of how good a well machined and thought out motor can run.
Nothing exotic or high maintenance in it....... Solid mid-700hp....... Can't go wrong.

What's the consensus (opinion) on a set of the TF 270's on a larger engine......say 530 to 550 cubic inch ?

Big bottleneck or ?

Do you mind sharing your combo with us

My OPINION is those heads are probably OK for the common 493 to 511 stroker street car, but a more serious engine at or above that displacement needs a more serious head.

I'd say that question is worthy of my std response(for most things engine combo related):

"It depends"

And......

Until there are quite a few sets in service, and various combos have been built using them...... I don't see how there could be any type of "consensus" about any aspect of their performance.

Fair enough.........I'm in the process of starting a pump gas 540, so just like to see if these would fill the bill or if I'd be wiser going to a larger head.

LD 496 ci, machined and assembled by Ray Barton.
640 flat tappet, 12.8 comp. 400-3 manifold ported by Wilson.
1050 Dominator on E 85 SR MW ported by Porter Racing (Dwayne)
69 Barracuda back halved with 4 link and tubular K frame with front steer rack by LRT Chassis, torqueflite by A and A trans, 4.30 in a Fab 9, 14x32 MT slicks.

As Dwayne said easy maint. I think I couldn't go with much more HP without going to an after market block?

Don

Just depends what you're trying to do with the engine. If you want 700 hp on pump gas the Trick Flows will do that for you. Peak power might be in the 6500 rpm range which works good for a street engine but could be a little low for a drag race only setup.

As has been brought up in the other TF thread, I really don't think the MW version of this head is going to break any new ground.......other than what you get for the price.
Whatever these heads are capable of, there is already another head available that will get the job done.

This isn't any different than the multitude of 23deg SBC heads offered up by all the various head manufacturers.
There is rarely any solid consensus as to which one of any different port volume(200,210,220,230, etc) is "best".
Different builders have their favorites, all work well.

I feel the same will be true with this TF 270 head.
If it fits the requirements of the intended build, I'm sure the results will be satisfying.

I will say that if the fit and finish of this new head is as nice as the 240 head(no reason to think it wouldn't be), for the price, they will be very hard to beat.