[LiL Jack]

I heard a major vendor has a cnc program already that goes 450 cfm. And the release date is sometime around early summer.

And have heard of a set going 480 cfm.

[65nss4spdGTO]

Originally Posted by twinturrbo406

... our ProPort 12.6 head goes (380 @ .550 lift) and (441 @ .700 lift) ...

Originally Posted by LiL Jack

I heard a major vendor has a cnc program already that goes 450 cfm. And the release date is sometime around early summer.

And have heard of a set going 480 cfm.

Here we go racing flow benches again...

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

[GTO Dan]

Originally Posted by 65nss4spdGTO

Here we go racing flow benches again...

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

FBTTFMFs. (that's flow benches...not Firebirds)

[cgeise]

Originally Posted by 65nss4spdGTO

Here we go racing flow benches again...

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

Are you saying the guys working on these dont know what there doing - aand are Not getting there the right way ???????

[Milepost]

Originally Posted by cgeise

Are you saying the guys working on these dont know what there doing - aand are Not getting there the right way ???????

Consider this Curt.... Most head porters will agree to this statement Chad Speier has on his Home Page....The Flowbench Conspiracy:


"I have had the opportunity to learn from some of the best porters in the industry. Just like grinders, calipers, and even a Sharpie, are tools of our trade, so is a flowbench. In some circles you will find debate that a flowbench isn’t a viable option for developing a port and making power. While I honestly believe it is not the end all, if you know what your looking at and how to apply the data your seeing, it’s a start and good things will happen!

I have also heard the debate that some develop ports without the aid of a flowbench. While this might be true, I wonder what kind of R&D and track expense was encountered in that endeavor? I wonder how many customers are the R&D and don't know it?

I feel with proper use of a pitot tube, and the proper use of some simple math, you can develop a port that will make power and set records. I believe that a flowbench is the lifeblood for a pitot tube. Other devices are of great help. Flow balls, string, even a car antenna! I’m not sure how one can visually look at a area and think that the area is too fast, we need to slow it down. I feel that every means available should be considered in development. If you have flowbench data vs. track results, you can build a data base that will prove successful each and every time.

I also hear that CFM isn’t critical. Well my friends, that’s simply not true! If you have a port that has 2.50 inches of minimum area, and it should move 325 CFM, but only moves 310 CFM, that is a problem! I want the port to flow the proper amount of air for the area available. When you have the proper amount of area needed for your engine combination, each and every time you move more air, it WILL make more power. Now I’m a big believer that the velocity profile vs. the port volume vs. the air moved, is key to a efficient port that will perform as it should. CFM isn’t the first thing to use in choosing a cylinder head, and it’s not tops on the list, but it is critical. WHEN IT COMES TO CYLINDER HEADS, PORT SHAPE, LOCALIZED VELOCITY, AVERAGE VELOCITY AND THEN CFM ARE IN THE ORDER OF IMPORTANCE IN MY DEVELOPMENT.

Now the flowbench itself. Oh boy have I had a battle with this! All I can say is if you own a set of plates and your bench shows it to be off, FIX IT! The equipment is only as good as the operator, and the knowledge of that person. We use a SF600 equipped with a PT Black Box II and Port Flow Analyzer software. Also in the shop is a very powerful, custom all electronic, PTS orifice bench that is used in development to pull higher depressions on the port for further advancements in port shape."

[65nss4spdGTO]

Originally Posted by cgeise

Are you saying the guys working on these dont know what there doing - aand are Not getting there the right way ???????

Not at all, just funny how things can get spun. I'm pretty sure this head will make some strong power. Will it be the best head? Will it be better then other heads that are available. Only time will tell. The only thing we do know for sure is it will be one of the most expensive Pontiac cylinder heads available.

I commend the few that are stepping up to develop this head.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

[john marcella]

Originally Posted by 65nss4spdGTO

Not at all, just funny how things can get spun. I'm pretty sure this head will make some strong power. Will it be the best head? Will it be better then other heads that are available. Only time will tell. The only thing we do know for sure is it will be one of the most expensive Pontiac cylinder heads available.

I commend the few that are stepping up to develop this head.

Calvin Hill
Hill Performance / Mondello Tech Center
708-250-7420

I dont think any one will claim it to be the best head. As far as race heads go, IMO, i think its just another almost for Pontiacs. But i think its a real nice almost. I expect this head to make pretty good HP #s. My HP goal is set and only time will tell.
But you are right the cost, castings are not cheep, will have to be cnc cut, seat registers cut and seats and guides installed. All this adds up. But if they can make the power right out of the gate i think it will be worth it to people. But at the same time i dont think its really any more than a lot of the alternative castings for those that are going after higher HP levels.

[Milepost]

Originally Posted by john marcella

I dont think any one will claim it to be the best head. As far as race heads go, IMO, i think its just another almost for Pontiacs. But i think its a real nice almost. I expect this head to make pretty good HP #s. My HP goal is set and only time will tell.
But you are right the cost, castings are not cheep, will have to be cnc cut, seat registers cut and seats and guides installed. All this adds up. But if they can make the power right out of the gate i think it will be worth it to people. But at the same time i dont think its really any more than a lot of the alternative castings for those that are going after higher HP levels.

IMO where the 11 deg Pro-ports will shine is in efficiency. I really don't think they will make any more PEAK power than a Tiger head but they very well could make more AVERAGE power and torque with over a wider range with a slightly smaller port and shorter valve combo. As Calvin said, they will be pricey but for some applications they might the best choice. Time will tell....

[john marcella]

Originally Posted by Milepost

IMO where the 11 deg Pro-ports will shine is in efficiency. I really don't think they will make any more PEAK power than a Tiger head but they very well could make more AVERAGE power and torque with over a wider range with a slightly smaller port and shorter valve combo. As Calvin said, they will be pricey but for some applications they might the best choice. Time will tell....

I actually think i could make more power with the Tigers, but i would want to move some things around and do a fair amount of welding on them. I am also not familiar with the material and heat treat like i am with the Edelbrocks. Plus i wanted to be able to make a cnc program for what ever i did to try and maybe recoup some $ on the project, and what i was going to do to the tigers would cost so much for someone else that no one would be interested. The PP is a real nice no fuss deal. JMO

[slowbird]

Originally Posted by john marcella

But at the same time i dont think its really any more than a lot of the alternative castings for those that are going after higher HP levels.

x2!
Good luck with your 11 degree Pro Ports. Looking forward to your results.

[gene simmons]

Originally Posted by LiL Jack

I heard a major vendor has a cnc program already that goes 450 cfm. And the release date is sometime around early summer.

And have heard of a set going 480 cfm.

Those damn rumors!
Come on Jack,we don't race flow benches.

[john marcella]

Originally Posted by LiL Jack

I heard a major vendor has a cnc program already that goes 450 cfm. And the release date is sometime around early summer.

And have heard of a set going 480 cfm.

I will post my results if a few weeks and in a couple weeks after that they will be available if there is any interest. When they show up, IM ON IT!