Power Port 240 TF porting results Flow Tech 2
#2432499
01/10/18 10:45 PM
01/10/18 10:45 PM
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Prochargedmopar
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Last edited by prochargedmopar; 01/10/18 11:37 PM.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Prochargedmopar]
#2432501
01/10/18 10:48 PM
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[img:center]https://www.dropbox.com/s/ymv1bcro6yie4rf/Photo%20Jan%2010%2C%206%2043%2044%20PM.jpg?dl=0[/img]
Not sure whats going on but I can’t seem to add pics any more. Hmmmmmm
Last edited by prochargedmopar; 01/10/18 10:49 PM.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Cab_Burge]
#2432539
01/10/18 11:42 PM
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Those numbers look good Similar to a set of Indy SR M.W heads that I had, not as good as the CNC ported 440-1 I've had It says standard port. Are the TFs raised port but still can use stock type intakes and Ex. manifolds. If I was Todd Marsh I would be getting some cnc files saved of Larrys work before he can’t do it any more. Either that or learning every trick of the trade this guy has to offer over the next X # of years.
Last edited by prochargedmopar; 01/10/18 11:43 PM.
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: BradH]
#2432633
01/11/18 02:33 AM
01/11/18 02:33 AM
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I believe he's using checking springs that are too soft for flow bench testing. That would explain the pattern I've seen where all his posted flow tests have abnormally high low-lift intake #s. If that's the case, yes that would back up that opinion.
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Prochargedmopar]
#2432635
01/11/18 02:36 AM
01/11/18 02:36 AM
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ccdave
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[img:center]https://www.dropbox.com/s/ymv1bcro6yie4rf/Photo%20Jan%2010%2C%206%2043%2044%20PM.jpg?dl=0[/img]
Not sure whats going on but I can’t seem to add pics any more. Hmmmmmm Did you use an Apple device to upload the pics?
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Sport440]
#2432641
01/11/18 02:42 AM
01/11/18 02:42 AM
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BradH
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I believe he's using checking springs that are too soft for flow bench testing. That would explain the pattern I've seen where all his posted flow tests have abnormally high low-lift intake #s. If that's the case, yes that would back up that opinion. The springs shown in the pic of the head on the flow bench are not stiff enough to hold the valve in the set position at low lifts. If they weren't stiff enough on my low-power bench, they're definitely not stiff enough for the bench pictured.
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: ccdave]
#2432672
01/11/18 05:24 AM
01/11/18 05:24 AM
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[img:center]https://www.dropbox.com/s/ymv1bcro6yie4rf/Photo%20Jan%2010%2C%206%2043%2044%20PM.jpg?dl=0[/img]
Not sure whats going on but I can’t seem to add pics any more. Hmmmmmm Did you use an Apple device to upload the pics? Yes, Iphone 7+
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: BradH]
#2432735
01/11/18 10:25 AM
01/11/18 10:25 AM
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Joined: Feb 2006
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I believe he's using checking springs that are too soft for flow bench testing. That would explain the pattern I've seen where all his posted flow tests have abnormally high low-lift intake #s. Could not agree more. One glance at the low lift numbers and... J.Rob
2009 PHR\EMC Competitor 2010 PHR\EMC Competitor 2011 PHR\EMC Competitor 2012 PHR\EMC Competitor 2013 PHR\EMC Competitor 2014 HotRod/EMC Competitor 2015 HotRod/EMC NoShow 2016 HotRod/EMC 3rd place SPEC Bigblock 2018 HotRod/EMC 7th place G3
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: RAMM]
#2432754
01/11/18 12:15 PM
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I've said it once and I will say it again. Without before and after numbers on the same flowbench there's always that BIG question mark at the end. I understand time is money and BIG numbers gets you more work but I like to do the math myself to judge whether the numbers TRULY stack up. Especially if the head porters bench is still from the "purple shaft age" with liquid manometers. You wouldn't believe how numbers could swing on my old flowbench during an 8 hour day.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Prochargedmopar]
#2432774
01/11/18 01:12 PM
01/11/18 01:12 PM
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Clanton
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That is like the flow that Koffels got from my std port but I have to ask does the gasket match on the corners of the port on yours? PS:My mistake I have Victors,DUH!SORRY!
Last edited by Clanton; 01/11/18 01:14 PM.
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: RAMM]
#2432825
01/11/18 03:11 PM
01/11/18 03:11 PM
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fast68plymouth
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I believe he's using checking springs that are too soft for flow bench testing. That would explain the pattern I've seen where all his posted flow tests have abnormally high low-lift intake #s. Could not agree more. One glance at the low lift numbers and... J.Rob You know there's a problem when the discharge coeffienct is over 100%.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: fast68plymouth]
#2432944
01/11/18 06:41 PM
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Prochargedmopar
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I asked the question you guys presented as it got me curious. “I post your pics and results sometimes on Moparts or other forums. Most say your low lift #’s are too high and the consensus between keyboard warriors is your checking springs are too weak to hold the valve at low lift. Any truth to this? Thanks” (Pro) I got an answer; “Floating the valves on the flow bench lol, I use the same checking springs for last 30 years, I check for vacuum leaks when I flow test, I got flow sheets for 36 years I had high numbers then, porting heads for round track engines you learn where to keep the flow up for torque, if I where to post my p7 and p8 heads for the dodge NASCAR engine they think they where hemi heads, those heads spoke for theirself making 950 plus HP and hold it up to 10,000 RPM, I'm fooling myself to post unreal numbers” (Flow tech 2) https://www.facebook.com/permalink.php?story_fbid=1218287181637121&id=503146179817895
"Old" member Registered: Sep 2001 Lost my credentials, I'm Back!! LOL 71 Ply Satellite Procharged 73 Dodge Dart Swinger 73 Ford F-100 390/Sniper efi/back to carb 01 Town and Country Limited 08 Dodge 2500 6.7 5" Deleted 02 Mercedes C230K 19 Camry
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Prochargedmopar]
#2432958
01/11/18 06:58 PM
01/11/18 06:58 PM
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Posts: 14,506 So. Burlington, Vt.
fast68plymouth
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Still doesn't explain how you end up with c/d numbers over 100%(and to get 100% efficiency it's air flowing through a perfectly straight unrestricted piece of tubing. Not air making turns around guides and valves and through valve seats).
It can't be better than 100%.
Most heads with 45deg seats, with a valve job and throat diameter/shape designed to provide good low lift flow will have c/d numbers from .100-.300 lift in the 70-75% range.
That head might very well flow 352@.700 lift.
It doesn't flow 104@.100 lift.
The thing to keep in mind with flow results are, the head flows what it flows. If you have it tested on 10 benches and get 10 different results, the fact is...... The head still actually flows the same on every bench(if the same test pressure is used).
However, Some of the results will be more accurate than others.
I'd happily flow one of those heads from Larry for free...... Just pay the shipping. Preferably one that was already flowed and you had numbers on it.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Prochargedmopar]
#2432973
01/11/18 07:33 PM
01/11/18 07:33 PM
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ccdave
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[img:center]https://www.dropbox.com/s/ymv1bcro6yie4rf/Photo%20Jan%2010%2C%206%2043%2044%20PM.jpg?dl=0[/img]
Not sure whats going on but I can’t seem to add pics any more. Hmmmmmm Did you use an Apple device to upload the pics? Yes, Iphone 7+ Moparts does not play nice with Iphones... Problem with UBB Threads. Exhausting..
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Re: Power Port 240 TF porting results Flow Tech 2
[Re: Prochargedmopar]
#2432980
01/11/18 07:52 PM
01/11/18 07:52 PM
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fast68plymouth
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That's all fine......... But it can't exceed 100% c/d. It's that simple.
If you have a c/d number over 100%, there's a calibration issue or a leak. End of story.
I have a 100cfm calibrated test plate, so I could take the calibration of my bench right out of the equation to see if that head flows 104cfm@.100 or not.
It either flows more than the 100cfm test plate, or it doesn't. I'm saying it will probably be +/- 20% less than that plate.
The reason for the focus on the .100 flow is, it's so easy to spot when it's that far off(20-25%). Then, once you know that number is wrong, the rest of the numbers are called into question.
If that head flowed 104@.100 lift on my bench I'd be the first one to take my hat off to Larry on a job well done and eat my words on calling into question the validity of his numbers.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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