flowbench follies
#200393
01/21/09 08:32 PM
01/21/09 08:32 PM
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Joined: Apr 2007
Posts: 871 WA 98043
thecarfarmer
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 871
WA 98043
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Ran across a flowbench forum while surfing today. Had an interesting thread. Test plates run on Ford's in-house flow bench vs. some Superflows vs. some home made ones. http://www.tractorsport.com/cgi-bin/foru...ct=ST;f=1;t=230Let the (flow)bench racing begin! -bill
Seduce the attractive, and charm the rest.
******
489 C.I.D., roller cam, aftermarket heads, tunnel ram, stock '54 Dodge rear axle assembly: which of these doesn't belong?
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Re: flowbench follies
[Re: S/ST 3040]
#200395
01/21/09 09:22 PM
01/21/09 09:22 PM
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Joined: Jan 2003
Posts: 4,244 Canada
Kam*Kuda
master
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master
Joined: Jan 2003
Posts: 4,244
Canada
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that is a really interesting forum. Cool
1970 Barracuda Convertible 1968 Satellite Street Strip car 1654.5 Mustang 1955 Land Rover
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Re: flowbench follies
[Re: S/ST 3040]
#200396
01/22/09 08:43 PM
01/22/09 08:43 PM
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Joined: Apr 2007
Posts: 871 WA 98043
thecarfarmer
OP
super stock
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OP
super stock
Joined: Apr 2007
Posts: 871
WA 98043
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Quote:
I don't think anybody cares. If your bench reads lower than most others, it just means the bench isn't accurate or the heads are garbage......depending on who did the heads.
Well, I thought it was interesting that a number of home made benches flowed within a similar point spread of a number of name brand flow benches. With the tests being done on different days, in different parts of the country, with changes in altitude, baro pressure, etc.
-bill
Seduce the attractive, and charm the rest.
******
489 C.I.D., roller cam, aftermarket heads, tunnel ram, stock '54 Dodge rear axle assembly: which of these doesn't belong?
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Re: flowbench follies
[Re: vcummins]
#200400
01/23/09 12:01 AM
01/23/09 12:01 AM
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Joined: Jan 2003
Posts: 5,487 SoCal
Brian Hafliger
master
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master
Joined: Jan 2003
Posts: 5,487
SoCal
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Quote:
A flow bench is A static testing instrument. they DO NOT make horse power
No, but someone who knows HOW to use them and WHAT to look for can make HP by applying what is learned from testing.
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Re: flowbench follies
[Re: S/ST 3040]
#200401
01/23/09 12:13 AM
01/23/09 12:13 AM
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Joined: Jan 2003
Posts: 14,531 So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,531
So. Burlington, Vt.
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ive owned a flow bench(2 different ones) since 1992.
after i had that first one about 2 years i decided that while it could be interesting to read about flow results gleaned from other shops using other benches.......the only numbers i really put any stock into were the ones i got from my own bench.
when i bought the second bench about a year and a half ago, i kept the first one on hand while i got used to the new one, and to be able to compare some heads in the event that the new bench showed numbers that didnt seem right.
once i got used to what to expect from the new bench, the old one got sold.......and now i'm at the point where i'm only concerned with the results that come off the new bench.
i still like reading the results that other people get, but i dont really consider their numbers and mine something that can be compared as truely "apples to apples".
on the other hand......even with as much variation as ive seen between flow benches.......it doesnt hold a candle to how much variation ive seen between different dynos......but thats really a whole 'nuther topic.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: flowbench follies
[Re: S/ST 3040]
#200403
01/23/09 01:00 PM
01/23/09 01:00 PM
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Joined: Feb 2005
Posts: 20,272 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,272
PA.
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I always flow a head befor and after porting a head and if it is a head I never played with befor I probably have it on the bench 6-10 times. Its only another tool but if you have the time its time well spent. Instead of posting posting flow numbers I would rather see how many cfm you picked up on any given head on your bench. example(head flowed 267cfm@28 befor and 298cfm@28 after.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.38@138.67
Livin and lovin life one day at a time
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Re: flowbench follies
[Re: pittsburghracer]
#200404
01/23/09 09:53 PM
01/23/09 09:53 PM
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Anonymous
Unregistered
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Anonymous
Unregistered
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pittsburghracer hit the nail on the head.a flowbench is nothing more than a tool.i've worked at a major speed shop for 20yrs,and can tell you that it's easy to get caught up in flow numbers.you can make a head flow what ever you want buy just changing the inches of h2o or cfm. even the type of stand you use can effect your outcome. benches are going to read different. the most important thing is to flow it before and after any work using the same settings and fixtures.i've worked on heads that flow great but wouldn't go down the track.the bench just lets you know if your going in the right direction.
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Re: flowbench follies
[Re: fast68plymouth]
#200405
01/24/09 03:39 PM
01/24/09 03:39 PM
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Joined: Jan 2003
Posts: 15,439 Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
i still like reading the results that other people get, but i dont really consider their numbers and mine something that can be compared as truely "apples to apples".
I know your old bench and mine were very close when we tested the same heads on both benches. However, your new "high powered" bench probably changes that now.
Quote:
on the other hand......even with as much variation as ive seen between flow benches.......it doesnt hold a candle to how much variation ive seen between different dynos......but thats really a whole 'nuther topic.
Ya' mean like two different "600 HP" engines tested on two different dynos and one ran 11.0 @ 121 and the other 10.5 @ 126 in the same car?
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