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Flow bench calibration question #1167537 01/29/12 12:42 AM 01/29/12 12:42 AM
Joined: Feb 2005 Posts: 20,193 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,193 PA.	If the flow bench community bases most of their flow numbers at 28 inches of water why does Super Flow calibrate their flow benches at 25 inches of water. Do ya think that would be the reason behind some inflated flow numbers? http://www.superflow.com/Flowbenches/sf600.html 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Flow bench calibration question [Re: pittsburghracer] #1167538 01/29/12 12:49 AM 01/29/12 12:49 AM
Joined: Aug 2003 Posts: 43,255 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,255 Bend,OR USA	Quote: If the flow bench community bases most of their flow numbers at 28 inches of water why does Super Flow calibrate their flow benches at 25 inches of water. Do ya think that would be the reason behind some inflated flow numbers? http://www.superflow.com/Flowbenches/sf600.html I'm under the impression thst the Super Flow 110 benches are flowed at 10 inches and then converted by the operator to 28 inch numbers Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Flow bench calibration question [Re: Cab_Burge] #1167539 01/29/12 12:53 AM 01/29/12 12:53 AM
Joined: Feb 2005 Posts: 20,193 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,193 PA.	The 110 is calibrated at 10 inches but check out the specs on the 600 and the 1020. When the industry standard is 28 why calibrate your bench at 25? 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Flow bench calibration question [Re: pittsburghracer] #1167540 01/29/12 01:00 AM 01/29/12 01:00 AM
Joined: Aug 2003 Posts: 43,255 Bend,OR USA C Cab_Burge I Win
Cab_Burge I Win C Joined: Aug 2003 Posts: 43,255 Bend,OR USA	Quote: The 110 is calibrated at 10 inches but check out the specs on the 600 and the 1020. When the industry standard is 28 why calibrate your bench at 25? I sure don't know I agree on using a standard number for the industry nation wide Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)

Re: Flow bench calibration question [Re: Cab_Burge] #1167541 01/29/12 04:35 AM 01/29/12 04:35 AM
Joined: Mar 2006 Posts: 9,910 Eighty Four, PA B G Racing master
B G Racing master Joined: Mar 2006 Posts: 9,910 Eighty Four, PA	Flow benches are like dynos,flow bench operators and dyno operators are like the the equipment they operate,some happy,some sad.You can take the same set of heads 3 different benches and get 3 different results.Depending on the equipment,conditions,setup and the operator the results may vary.How many times are the conditions in a controlled enviroment(dyno room or flow bench)duplicated in the real enviroment that the parts are used in. Another consideration is imput information.Sometimes the results can be manuplated.Don't get me wrong here,flow benchs as dynos are great tools for engine building.A flow bench can help get you to the desired maximum flows and help balance all cylinder volumes equally for your build and tell you if you have any issues.But seriously if your buying a set of heads that have been CNCed by someone who has disected the design and mastered a program what more can you do other than little touch up here and there. [IMG]http://i430.photobucket.com/albums/qq21/ajcasini/max_zpsdppwd9km.jpg[/IMG]

Re: Flow bench calibration question [Re: B G Racing] #1167542 01/29/12 04:43 PM 01/29/12 04:43 PM
Joined: Feb 2005 Posts: 20,193 PA. pittsburghracer OP "Little"John
pittsburghracer OP "Little"John Joined: Feb 2005 Posts: 20,193 PA.	Quote: Flow benches are like dynos,flow bench operators and dyno operators are like the the equipment they operate,some happy,some sad.You can take the same set of heads 3 different benches and get 3 different results.Depending on the equipment,conditions,setup and the operator the results may vary.How many times are the conditions in a controlled enviroment(dyno room or flow bench)duplicated in the real enviroment that the parts are used in. Another consideration is imput information.Sometimes the results can be manuplated.Don't get me wrong here,flow benchs as dynos are great tools for engine building.A flow bench can help get you to the desired maximum flows and help balance all cylinder volumes equally for your build and tell you if you have any issues.But seriously if your buying a set of heads that have been CNCed by someone who has disected the design and mastered a program what more can you do other than little touch up here and there. I understand what you are saying Bob but there are a lot of inflated numbers floating around out there and a CNC program does not fix the problem. A CNC port is only as good as the hand ported head it was copied from. Indy is a perfect example as their flow numbers are always on the high side. Getting back to the question why would a major flow bench manufacture calibrate their bench at 25 inch instead of the industry standard 28? 1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27 Livin and lovin life one day at a time

Re: Flow bench calibration question [Re: pittsburghracer] #1167543 01/29/12 08:11 PM 01/29/12 08:11 PM
Joined: Jul 2010 Posts: 2,091 Delray beach, Florida P Performance Only top fuel
Performance Only top fuel P Joined: Jul 2010 Posts: 2,091 Delray beach, Florida	Quote: Quote: Flow benches are like dynos,flow bench operators and dyno operators are like the the equipment they operate,some happy,some sad.You can take the same set of heads 3 different benches and get 3 different results.Depending on the equipment,conditions,setup and the operator the results may vary.How many times are the conditions in a controlled enviroment(dyno room or flow bench)duplicated in the real enviroment that the parts are used in. Another consideration is imput information.Sometimes the results can be manuplated.Don't get me wrong here,flow benchs as dynos are great tools for engine building.A flow bench can help get you to the desired maximum flows and help balance all cylinder volumes equally for your build and tell you if you have any issues.But seriously if your buying a set of heads that have been CNCed by someone who has disected the design and mastered a program what more can you do other than little touch up here and there. I understand what you are saying Bob but there are a lot of inflated numbers floating around out there and a CNC program does not fix the problem. A CNC port is only as good as the hand ported head it was copied from. Indy is a perfect example as their flow numbers are always on the high side. Getting back to the question why would a major flow bench manufacture calibrate their bench at 25 inch instead of the industry standard 28? pretty simple really, in the case of Superflow, that's how their benches are rated. the SF600 moves 600 CFM @ 25" and the SF1020 moves 1000CFM @ 25". the benches are calibrated at 25" to be sure they're working properly. if the bench won't pull 600 or 1000 cfm respectively it should serve as an alert to the operator of a problem that needs to be corrected. after the bench is calibrated you are ready to test at any setting you want. any of the SF benches i've been around that use the flow-com and motor controller have been extremely consistent from bench to bench. don't confuse calibration test pressure with actual testing test pressure. machine shop owner and engine builder

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