piston
Hi Smoking, READ the above GRAPHS, there are three colors.
They state airflow requirement AND piston acceleration. (the Left, Center, Right offset).
The effects are easy to measure, DONE by my bench dyno's airflow turbine.
I do not know how to be more clear both with the Math (not mine) and Measurement.
THUS YOUR statement of the LACK of ability to measure Air Flow = Untrue
Lance
They state airflow requirement AND piston acceleration. (the Left, Center, Right offset).
The effects are easy to measure, DONE by my bench dyno's airflow turbine.
I do not know how to be more clear both with the Math (not mine) and Measurement.
THUS YOUR statement of the LACK of ability to measure Air Flow = Untrue
Lance
None of the graphs mention air flow at all. Did you even read them? The OP question was answered by joecar. It appears that all you're doing is finding every opportunity to brag about having a flow bench and capitalizing random words. If you manifest information out of thin air, people notice. Show the data from your bench that indicates a measurable difference in mass flow due to a change in pin offset or don't make the claim. Easy.
Piston Velocity Hi Joe, please help, your fine work states Piston Velocity.
The Piston Velocity allows the weight of the air to enter the cylinder with respect to position. (volume/pressure)
There is another point of Piston Dwell at BDC.
Yes I do have an Air Flow Bench.
Yes I do have Kistler Cylinder Transducers commonly used with my Ford Ranger "twin-plug" engine program. (Camless)
YES I DO USE AIR for MEASUREMENT AND TRUE, when I was atop Pikes Peak, the AIR was VERY THIN !
MY measurement was made (observed) using an Engine Dynamometer, Super Flow, with supply Air Turbine AS STATED.
Lance
The Piston Velocity allows the weight of the air to enter the cylinder with respect to position. (volume/pressure)
There is another point of Piston Dwell at BDC.
Yes I do have an Air Flow Bench.
Yes I do have Kistler Cylinder Transducers commonly used with my Ford Ranger "twin-plug" engine program. (Camless)
YES I DO USE AIR for MEASUREMENT AND TRUE, when I was atop Pikes Peak, the AIR was VERY THIN !
MY measurement was made (observed) using an Engine Dynamometer, Super Flow, with supply Air Turbine AS STATED.
Lance
Please forgive me for being dubious regarding word of mouth from an individual of questionable literacy. I'm saying I'd like to see the data. Otherwise all I can infer is that you're just tooting your horn about equipment you possess.
TECH Senior Member
Joined: Apr 2002
Posts: 6,080
Likes: 17
From: So.Cal.
I'm not an expert, but I think what happens is the difference in the peak acceleration of the positive and negative offset cases occurs right at (or close to) one of the valve events (would have to superimpose a cam timing graph over the piston acceleration/velocity to see it better); also, there is also a difference in velocity right during overlap.
His literacy is not questionable, I believe English is not his first language; he does have a well equipped high-end performance shop here in SoCal (which in SoCal this is quite an achievement), I'll be going to visit him sometime soon.
His literacy is not questionable, I believe English is not his first language; he does have a well equipped high-end performance shop here in SoCal (which in SoCal this is quite an achievement), I'll be going to visit him sometime soon.
TECH Senior Member
Joined: Jun 2016
Posts: 22,295
Likes: 3,617
From: Central Cal.
I believe English IS his first language, but out of New Zealand, plus his technical expertise lends itself to language structure many of us are not conditioned to. He thinks outside of a box many of us would have difficulty getting much beyond.
Short answer- Don't count him short in any automotive discussion.
Short answer- Don't count him short in any automotive discussion.
Last edited by G Atsma; Jul 18, 2017 at 11:20 PM.
Fair enough. It really goes without saying that some of the stuff he says makes you wonder if he's got all his marbles... Communication abilities notwithstanding, I'm interested in seeing the data for what he mentioned.
Smokey Yunick = Pin Offset Hi ALL, thanks for the support.
My first test was done using my SF-800 engine Dyno in 1982.
I spoke to Smokey Yunick about his "Pin Offset" remarks and the best way to test.
The engine was a Ford 351-C for a Pantera customer.
I fit Boss 302 OEM pistons (OEM Offset pin reversed) AND 351-W rods into the 351-C crankcase.
Those here SHOULD read about : Smokey Yunick piston pin offset.
Lance
My first test was done using my SF-800 engine Dyno in 1982.
I spoke to Smokey Yunick about his "Pin Offset" remarks and the best way to test.
The engine was a Ford 351-C for a Pantera customer.
I fit Boss 302 OEM pistons (OEM Offset pin reversed) AND 351-W rods into the 351-C crankcase.
Those here SHOULD read about : Smokey Yunick piston pin offset.
Lance
Hi ALL, thanks for the support.
My first test was done using my SF-800 engine Dyno in 1982.
I spoke to Smokey Yunick about his "Pin Offset" remarks and the best way to test.
The engine was a Ford 351-C for a Pantera customer.
I fit Boss 302 OEM pistons (OEM Offset pin reversed) AND 351-W rods into the 351-C crankcase.
Those here SHOULD read about : Smokey Yunick piston pin offset.
Lance
My first test was done using my SF-800 engine Dyno in 1982.
I spoke to Smokey Yunick about his "Pin Offset" remarks and the best way to test.
The engine was a Ford 351-C for a Pantera customer.
I fit Boss 302 OEM pistons (OEM Offset pin reversed) AND 351-W rods into the 351-C crankcase.
Those here SHOULD read about : Smokey Yunick piston pin offset.
Lance
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Verdad Gallardo Hi Jake, AGAIN YOU make a FOOL of YOURSELF.
Smokey had NASCAR customers, I had the Pantera customers, I have the SF-800, AND as stated it was my engine assembly tested in MY SHOP with the items fitted as STATED.
Do you work for CNN or Hillery ?
Lance
Smokey had NASCAR customers, I had the Pantera customers, I have the SF-800, AND as stated it was my engine assembly tested in MY SHOP with the items fitted as STATED.
Do you work for CNN or Hillery ?
Lance