PTS Flowbench Forum

how would you calculate flow for a plate that has 4=1 inch holes? Plate is 6" by 6" inches the holes are 2.5" apart. the plate is 1/8 thick with strait cut holes . I was told it flowed 190 cfm @ 5 inches of water.

here is a drawing.

Assuming the holes behave independently of one another, using the spreadsheet from THIS THREAD, I calculate the holes would have to be 1.25" to flow 190 cfm @ 5".

Caveat: I'm not sure if my initial assumption is valid, the holes may interact with each other. I'm sure others on this forum have investigated this, hopefully someone with relevant experience will comment.

It has been a long time since I made some posts to the Flow Bench Forum.

Getting ready to retire from Ford after 38+ years (December 31, 2016) so may have more time to post.

Back to the question.

Superflow at one time build a carb flow bench that was called a Super Flow 1200 bench.
(They only sold a few of these benches (maybe a few more than a dozen).

So the bench did not have a Flow Range Selector design. It used simple "Plugs" to seal the different flow orifices
if you were flowing one orifice at a time or you removed two "Plugs" to get a different air flow range.

The flow ranges were 200 cfm, 400 cfm, and 600 cfm. It was a pain in the butt to change the "Plug" arrangement
quickly as you had to tear off your test platform to get inside the bench.

So I wanted a finer flow difference (100 cfm changes) so we took the bench top off and machined in a hole diameter
designed for a 100 cfm flow and also added the very first Boating Marine "Port Hole" to the front of the flow bench.

We calibrated the bench and found that if the holes were a given distance apart then each flow orifice worked properly and
gave additive numbers to the flow number. Example 400 cfm hole open, remove 200 cfm plug, retest and you get 598.6 cfm
You just needed to get a accurate cfm number for the different combinations of holes just like Super Flow did when they did
their calibration sheet.

So Superflow came and looked at the flow bench and changed their design. They added the Boating Marine "Port Hole" to the front of their
SF 1200 Flow Bench. I passed on the info to the Flow Bench Forums, years later, and that is a common feature to the bench design today.

So YES, you can get accurate numbers with Multiple Orifices open on a Flow Plate.

Tom V.

Nice to see you here again Tom, we could use some fresh insight these days.

Congratulations on the retirement

Rick

better late than never.........
Congrats on your retirement!!!!!!

Well I have officially been retired a month now so will have to start posting more often.

I was busy the last few years working on a ECOBOOST project called "Winning the Le Mans Race" with a 3.5L V-6 Twin Turbo
EcoBoost engine installed in the new Ford GT Race Cars and going into 2017 production $$$$$$ soon.

So to cut to the chase, Myself and a whole bunch of other Engineers, Cad people, Fabrication people, Motorsports people, etc were able to see Ford
win the Le Mans Race again after 50 years. The Guy who hired me into the Ford Motor Company 39 years ago was the RACE Program Manager for
the teams that won the race in 1966, 1967, 1968, and 1969. Homer Perry was his name and he has gone to be with GOD now. He passed away at
96 years young 2 days after the 2016 race and was able to see Ford repeat 50 years later what he and his teams did in 1966 when they won the
first time with a Ford GT sports car.

But it is time to think about building a new Flow Bench for my Retirement Shop based on all of the new tricks and parts that your guys have
developed over the years while I have bee absent from the Forum. I will take a few days and try to get a feeling for all of the new stuff you guys
have come up with in the designs.

Tom Vaught

Very much looking forward to this project.

Rick

Just an update on the 2017 Le Mans race. This was my last race as far as being involved in the engineering side.

Had the capability to make 1000+ HP and run with the LP-1 and LP2 type engines (we run in the PRO Class).
After we won last year beating Ferrari and the other guys on the 50th Anniversary, "The Race Regulators" decided to
tack on weight and boost limits on our cars. So no need for 1000 HP engine when they will not let you run the engine
we won with last years that was not making 1000 HP. They said they were trying to make the racing more "even" for the competitors.

Still looking for my retirement house and property and then when settled in will start on my new Flow Bench.

Have a great day everyone.

Tom V.

Tom Vaught wrote:Just an update on the 2017 Le Mans race. This was my last race as far as being involved in the engineering side.

Had the capability to make 1000+ HP and run with the LP-1 and LP2 type engines (we run in the PRO Class).
After we won last year beating Ferrari and the other guys on the 50th Anniversary, "The Race Regulators" decided to
tack on weight and boost limits on our cars. So no need for 1000 HP engine when they will not let you run the engine
we won with last years that was not making 1000 HP. They said they were trying to make the racing more "even" for the competitors.

Still looking for my retirement house and property and then when settled in will start on my new Flow Bench.

Have a great day everyone.

Tom V.

Are your cars running in IMSA this year? Headed to Watkins Glen this coming week for the 6hrs at the Glen.