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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: 1320Dart]
#1711979
12/19/14 07:33 PM
12/19/14 07:33 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Evidently, that only happens if you agree with standard, regurgitated nonsense.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: madscientist]
#1711981
12/19/14 07:58 PM
12/19/14 07:58 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
You don't have to spend all day at the bench if you know what you are doing. It's that simple. I don't use higher than 28" test pressures to inflate numbers. If you had as much flow bench time as you say you do, you would get that.
I'm going to race my 9 second torque wrench on Sunday. Whatcha got for that?
I tested at 28"... for the rest of it.. I wont even
respond... have a good day... back to your post Brad
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: madscientist]
#1711982
12/19/14 08:15 PM
12/19/14 08:15 PM
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Joined: May 2014
Posts: 503
Idaho
1320Dart
mopar
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mopar
Joined: May 2014
Posts: 503
Idaho
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This is just my opinion, but if people are repeating incorrect statements, then those that know the correct ways, should teach/show why its incorrect. And try to help the rest of us by doing that at the same time. 
Greg ----------------------------------------------------------------- Cost is irrelevant, making memories is far more valuable! 
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: MR_P_BODY]
#1711983
12/19/14 09:48 PM
12/19/14 09:48 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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I test at 38, 32, 38, 42 regularly. I now have the ability to test at 60" inches plus some.
So what you really want is for those of you didn't pay for something be given that for free, just because of the internet?
I will say this...if your cylinder head porter does not test at a MINIMUM of 28" all the time, and is not using higher test pressures on a regular basis (especially with the intake system installed on the head) you are just pissing performance away.
It's that simple.
Comp, Pro Stock, Azzcar (and I know for a FACT Stock and SS guys) are testing at pressures up to 100"!!!!!!!!!!!!!!!!!! They ain't doing it to post big numbers and run their mouths on MoParts. They are doing it for RESULTS.
Take that to the bank.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: madscientist]
#1711984
12/19/14 09:56 PM
12/19/14 09:56 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
OP
Taking time off to work on my car
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OP
Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
I will say this...if your cylinder head porter does not test at a MINIMUM of 28" all the time, and is not using higher test pressures on a regular basis (especially with the intake system installed on the head) you are just pissing performance away.
Which goes back to the original reason why I posted this, i.e. what I'd heard re: the benefits of testing at > 28" H2O.
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: madscientist]
#1711985
12/19/14 09:58 PM
12/19/14 09:58 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Are you specifically talking to me? What did I say about big numbers? I said flow at two different test pressures and consider the results.
I can tell from your comments that your time with a flow bench is limited.
As for the guy who has never pulled to the line and raced a flow bench...how silly can you be? Every serious shop has a flow bench a dyno.
They also have torque wrenches and ring compressers too. Bet you never raced either of those? 
you do know Mr. P was a flow engineer at Mopar correct? 
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: Quicktree]
#1711986
12/19/14 10:02 PM
12/19/14 10:02 PM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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Quote:
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Are you specifically talking to me? What did I say about big numbers? I said flow at two different test pressures and consider the results.
I can tell from your comments that your time with a flow bench is limited.
As for the guy who has never pulled to the line and raced a flow bench...how silly can you be? Every serious shop has a flow bench a dyno.
They also have torque wrenches and ring compressers too. Bet you never raced either of those?
you do know Mr. P was a flow engineer at Mopar correct?
Not true Tony but I did do a lot of flow work
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: MR_P_BODY]
#1711987
12/19/14 10:04 PM
12/19/14 10:04 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
Quote:
Are you specifically talking to me? What did I say about big numbers? I said flow at two different test pressures and consider the results.
I can tell from your comments that your time with a flow bench is limited.
As for the guy who has never pulled to the line and raced a flow bench...how silly can you be? Every serious shop has a flow bench a dyno.
They also have torque wrenches and ring compressers too. Bet you never raced either of those?
you do know Mr. P was a flow engineer at Mopar correct?
Not true Tony but I did do a lot of flow work
hell i thought you were an engineer? 
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: Quicktree]
#1711988
12/19/14 10:05 PM
12/19/14 10:05 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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So what if he was? He still puts his pants on one leg at a time right?
Test and LEARN for yourself.
Unless you can prove to me that you (or anyone else) wrote the 10 Commandment in stone with your own finger, I won't take what is said as gospel. Regardless of who anyone works (or worked) for.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: madscientist]
#1711990
12/19/14 10:09 PM
12/19/14 10:09 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
So what if he was? He still puts his pants on one leg at a time right?
Test and LEARN for yourself.
Unless you can prove to me that you (or anyone else) wrote the 10 Commandment in stone with your own finger, I won't take what is said as gospel. Regardless of who anyone works (or worked) for.
why are you being so dam nasty?
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: MR_P_BODY]
#1711991
12/19/14 10:10 PM
12/19/14 10:10 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
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Are you specifically talking to me? What did I say about big numbers? I said flow at two different test pressures and consider the results.
I can tell from your comments that your time with a flow bench is limited.
As for the guy who has never pulled to the line and raced a flow bench...how silly can you be? Every serious shop has a flow bench a dyno.
They also have torque wrenches and ring compressers too. Bet you never raced either of those?
you do know Mr. P was a flow engineer at Mopar correct?
Not true Tony but I did do a lot of flow work
hell i thought you were an engineer?
Nope... just a mech/tech on pre proto and proto stuff
and a lot of R&D
ok close enough 
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: Quicktree]
#1711992
12/20/14 02:42 AM
12/20/14 02:42 AM
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Joined: May 2003
Posts: 6,568
Downtown Roebuck Ont
Twostick
Still wishing...
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Still wishing...
Joined: May 2003
Posts: 6,568
Downtown Roebuck Ont
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Quote:
Quote:
So what if he was? He still puts his pants on one leg at a time right?
Test and LEARN for yourself.
Unless you can prove to me that you (or anyone else) wrote the 10 Commandment in stone with your own finger, I won't take what is said as gospel. Regardless of who anyone works (or worked) for.
why are you being so dam nasty?
Because he thinks his bench is bigger than yours.
Can anybody give me a rough idea if you had a bench that can pull 28" thru a 4" pipe, how much could it pull on a typical wedge head port?
We'll see whose is bigger 
Kevin
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: BradH]
#1711993
12/20/14 11:01 AM
12/20/14 11:01 AM
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Joined: Feb 2005
Posts: 4,318
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,318
Prospect, PA
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Thinking about it dynamically you would think lower lift should be tested at lower pressure because the piston is not moving very fast or forcefully compared to 1/3 to 1/2 way down the bore when the valve is open and piston speed is high. Also if the ex valve is open it is just scavenging depression causing the flow witch surely is not 36 inches.
I disagree, low lift is when it is moving the fastest during the overlap period and right after the exhaust valve closes, after that
Well, you're kind of(?) both wrong.
This graph from David Vizard's most recent porting book may help you understand what's going on w/ the in-cylinder pressures and seat / port velocities:
1. Highest is during overlap (at higher RPM, at least) due to exhaust-assisted low pressure
2. Lowest is as the intake cycle is closing; might even go in reverse as you get into reversion if the valve doesn't close soon enough
3. Peak after the overlap cycle has ended is shown around the 70-75* ATDC point where, in this particular graph, the pressure differential is bouncing around the 50" H20 mark
Wow. The graph has a pile of great info in it. Thanks
Last edited by BSB67; 12/21/14 10:51 AM.
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: Quicktree]
#1711994
12/20/14 11:37 AM
12/20/14 11:37 AM
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Joined: Jan 2003
Posts: 3,575
The Netherlands
BigBlockMopar
master
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master
Joined: Jan 2003
Posts: 3,575
The Netherlands
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Quote:
So what if he was? He still puts his pants on one leg at a time right?
How inefficient. 
I've learned about gravity and balance and stuff a while ago and nowadays I always use both legs and pull up the pants in 1 or 2 go's, all while sitting down ofcourse.
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Re: Flowbench testing heads at MORE than 28" H2O?
[Re: BigBlockMopar]
#1711995
12/20/14 11:51 PM
12/20/14 11:51 PM
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Joined: Sep 2014
Posts: 4,457
Washington
madscientist
master
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master
Joined: Sep 2014
Posts: 4,457
Washington
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Proud of you dude, you put on your pants with both legs at once.
Guess that makes you a professional head porter?
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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