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R 70 Judge · 01-07-2012, 12:29 AM

Quote:

Originally Posted by slowbird

I believe I heard that Jon Kaase doesn't use his flow bench that much (think that was in an article some where) and I also heard that Carl Foltz (CFE, his heads dominate NHRA Pro Stock) doesn't use it that much either. I could be wrong, but I thought I heard that.

Quote:

Originally Posted by LiL Jack

ha, that guy in Florida told me the same thing a day or two ago.HMMMMMM

From what I've been told the flow bench is just a tool. This is just my opinion, but it would seem that the head porters turning out all of the fast junk tend to focus on the correct CSA, valve size, and port shape for the application and desired RPM range. The amount of CFM the port flows is an afterthought and just the byproduct of a properly designed head. Also, there is no mention of wet flow or if the super high flow head just smashes all of the fuel against the port wall and drops it all out of suspension.

IIRC Langer made near 1000hp with a 370cfm Wenzler head many years back. These new 490cfm - 500cfm heads should blow those away if cfm is all that matters.

Poke a big enough hole in any head and it will flow whatever you want it to flow

blaktopr · 01-07-2012, 12:30 AM

Quote:

Originally Posted by 65nss4spdGTO

This is a really good question. I can grab a D-Port, Pontiac E-head and go to work on those heads and get them really close, but I will always take the time to go to the flow bench and confirm my work. I also know that I wouldn't have a 350CFM standard push rod location E-head if it wasn't for my flow bench, I would be stuck in the 330CFM range like most of the standard port E-heads that are out.

This thread is about the little details, the port shape, size and volume can all be about the same, but fine tuning the short turn, the valve job, the valve shape can make a huge difference.

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

I got 360 from a standard E head from using my brain, and a 2.11 valve.

R 70 Judge · 01-07-2012, 12:32 AM

Quote:

Originally Posted by blaktopr

Yes. Pontiacs put out different internal frequencys that we tune our intake tract to.

I think rod length also comes into play here as well

blaktopr · 01-07-2012, 01:02 AM

Quote:

Originally Posted by R 70 Judge

I think rod length also comes into play here as well

Yeah, plus the resonance frequencies of the rod shape and density of material? I try to tune them with the valve springs also. Helps controlling the valve past 8K.

Half-Inch Stud · 01-07-2012, 10:28 AM

Quote:

Originally Posted by blaktopr

I got 360 from a standard E head from using my brain, and a 2.11 valve.

What can you get with the PMD Iron head without eggshellin it?
================================================== ==
Beginning to figure that Langer's statement on flow below .550" lift must have much to do with the type of fuel delivery & inhale tract wet-flow capability. Afterall a 330CFM ave flow that made a fuel pee puddle on the slug top would combust poorly.

All the while we focus on flow numbers so we can say... "it's in the hole. It's in the hole! The cinderella kid has done it.." Yea, the age-old HP challenge has been to get&maintain a fuel-air suspension on the upstroke for good ignition.

65nss4spdGTO · 01-07-2012, 11:28 AM

Quote:

Originally Posted by blaktopr

I got 360 from a standard E head from using my brain, and a 2.11 valve.

Those are some really good numbers, nice job. How much faster was the car at the race track?

Most of the racers that have switched from the 300 / 330 CFM heads to my 350 CFM CNC E-heads have picked between .50 to .75 ET and 6 to 8 MPH.

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

65nss4spdGTO · 01-07-2012, 11:33 AM

Quote:

Originally Posted by slowbird

What lift range are you using to average you numbers?

I use averages from .100" to .900" lift. The averages would be higher if I used .300" to 1.000" lift.

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

65nss4spdGTO · 01-07-2012, 11:43 AM

Quote:

Originally Posted by slowbird

If Carl Foltz said here is a set of Pro Ports I quantee they'll make power but never been on a bench, yes I would hand him my money.

He must still have a flow bench since he posts flow numbers with the heads he sells.

http://www.thebmfstore.com/ProductDe...ductCode=10405

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

blaktopr · 01-07-2012, 12:25 PM

Quote:

Originally Posted by 65nss4spdGTO

Those are some really good numbers, nice job. How much faster was the car at the race track?

Most of the racers that have switched from the 300 / 330 CFM heads to my 350 CFM CNC E-heads have picked between .50 to .75 ET and 6 to 8 MPH.

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

Thanks and I know it would be more than that when the motor gets in my car.....however, I must include this with your Q? and all this flowbench talk.....
http://en.wikipedia.org/wiki/Pot_cal...e_kettle_black

Maybe I can sell this "upgrade"? Call now and mention this thread and I will give a 100$ discount.

GTO · 01-09-2012, 04:39 PM

Quote:

Originally Posted by 65nss4spdGTO

Those are some really good numbers, nice job. How much faster was the car at the race track?

Most of the racers that have switched from the 300 / 330 CFM heads to my 350 CFM CNC E-heads have picked between .50 to .75 ET and 6 to 8 MPH.

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

Wow. Is that just a head change? That's a good impovment. I'm hopefully going from a 320-330 E-head to a 370-380 Hi Port with a cam change. Looking forward to the results. ... Eric.