SF Sizes

[blaktopr]

The real discussion is not how to fix SF stuff. As Rick states, it is to show/prove that the PTS stuff is the higher standard in the industry.

[1960FL]

Gerald,

Not trying to correct the SF world, just create a level playing field for all who are willing to calibrate correctly. It is not about who is right and who is wrong it is about a standard comparison. We all know that looking at cylinder heads based on just gross flow is stupid but here still just weeks from 2012 the customer still focuses on it and so do many of those in the industry, it is a shame.

Rick

I am set on my mission and to "aggravate Bruce"

Oh, thanks for posting the Flow Around, personally not sure what it shows but that is for another day

[blaktopr]

I am set on my mission and to "aggravate Bruce"

I can see Bruce rolling his eyes right now.

Just watch out Rick, you might push Bruce too far and then he will have me show up at your house on my wetflow soapbox.

[65mustang393]

I'd like all the benches to share the same calibration, or close to it. Apples or oranges, I don't care.

Head flow around shows that most benches are close to each other but... look at the two Flowdata benches. One is relatively close and the other is pretty far off.

[Chad Speier]

I honestly don't want to be low or high with my flow numbers, but I want to be correct.

I'm tired of all the grief with benches. If I was just an R&D shop, it would be different. I just NEED to know what I'm seeing is real. Yes, it's real to my bench and that is all that matters. But it's not real in the fact that our industry is happy with such a large gap.

If guys who really own SF benches can accept that the SF bench down the street can be 20 cfm lower or higher, and they are OK with it, then we just found our niche for a DIY bench. "We WILL get you closer."

To be honest I do this for a living. If myself, Bruce, Rick... anyone has a hand in changing the way we look at this subject, it's a good thing. I'm not trying to discredit any Superflow bench, this is first. What I'm trying to do is find why there is such a large gap in the product. I know the answer, anyone who has operated the bench knows the answer. It's time to get down to the meat and potatos and try and FIX and EDUCATE rather than guess and assume...

The PTS bench needs no defending, plain and simple. The PTS bench needs no accuses. The PTS bench is a viable alternative for any production shop, just like a Superflow, Flowdata, Sanez. HOWEVER, any bench MUST be calibrated properly and it MUST be regularly calibrated and cared for just like any piece of equipment.

Do you realize how many people I ask when the last time they calibrated their bench and they say the never have!!! really??? I have sent my plates to no less than 10 guys..

And that flow around, they didn't even use the same sized bore!!!!!!!!!!!!!!!!

[65mustang393]

Bird is done being fried and I have the PTS cal plate data on the SF600FC. I'll post pics in a sec.

[65mustang393]

PTS cal plates vs SF numbers. Shows the same trend as the SF300. About 3% low.

[65mustang393]

300 and 400 cfm cal plates.

[65mustang393]

The lovely PTS 400 cfm plate! In all seriousness though... thank you Bruce for supplying such a nice product at a very fair price.

[65mustang393]

SF number are low. They probably calibrate it wrong and after issuing over ten thousand benches, they won't admit a mistake.

Problem is that unless every SF owner is willing to bump their numbers by 3-4% you're gonna have people who cry foul because 350 PTS cfm is only 336-339 SF cfm.

So if you have a home made bench, just save yourself a lot of grief and keep some "SF numbers" to go along with the real ones.