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flowbench follies #200393
01/21/09 08:32 PM
01/21/09 08:32 PM
Joined: Apr 2007
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WA 98043
thecarfarmer Offline OP
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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=230

Let the (flow)bench racing begin!

-bill

4964113-flow.jpg (78 downloads)

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?
Re: flowbench follies [Re: thecarfarmer] #200394
01/21/09 09:10 PM
01/21/09 09:10 PM
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On the south side of Nowhere
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S/ST 3040 Offline
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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.


Re: flowbench follies [Re: S/ST 3040] #200395
01/21/09 09:22 PM
01/21/09 09:22 PM
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Canada
Kam*Kuda Offline
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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
Re: flowbench follies [Re: S/ST 3040] #200396
01/22/09 08:43 PM
01/22/09 08:43 PM
Joined: Apr 2007
Posts: 871
WA 98043
thecarfarmer Offline OP
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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?
Re: flowbench follies [Re: thecarfarmer] #200397
01/22/09 08:49 PM
01/22/09 08:49 PM
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Posts: 294
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vcummins Offline
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A flow bench is A static testing instrument. they DO NOT make horse power

Re: flowbench follies [Re: thecarfarmer] #200398
01/22/09 11:23 PM
01/22/09 11:23 PM
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Oregon
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AndyF Offline
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It was a cool project and it showed a bunch of people that benches are pretty close to each other when checked with a standard orifice type of gauge.

Re: flowbench follies [Re: AndyF] #200399
01/22/09 11:49 PM
01/22/09 11:49 PM
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On the south side of Nowhere
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S/ST 3040 Offline
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274 to 309.8 isn't all that close.

Re: flowbench follies [Re: vcummins] #200400
01/23/09 12:01 AM
01/23/09 12:01 AM
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Brian Hafliger Offline
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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.


Re: flowbench follies [Re: S/ST 3040] #200401
01/23/09 12:13 AM
01/23/09 12:13 AM
Joined: Jan 2003
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So. Burlington, Vt.
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fast68plymouth Offline
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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
Re: flowbench follies [Re: fast68plymouth] #200402
01/23/09 12:22 AM
01/23/09 12:22 AM
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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S/ST 3040 Offline
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I still like to hear about flow numbers but, only
compare numbers from my own bench.

Re: flowbench follies [Re: S/ST 3040] #200403
01/23/09 01:00 PM
01/23/09 01:00 PM
Joined: Feb 2005
Posts: 20,116
PA.
pittsburghracer Offline
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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
9.42@138.27

Livin and lovin life one day at a time




Re: flowbench follies [Re: pittsburghracer] #200404
01/23/09 09:53 PM
01/23/09 09:53 PM

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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.

Re: flowbench follies [Re: fast68plymouth] #200405
01/24/09 03:39 PM
01/24/09 03:39 PM
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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BradH Offline
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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?

Re: flowbench follies [Re: BradH] #200406
01/25/09 11:23 PM
01/25/09 11:23 PM
Joined: Jan 2003
Posts: 14,479
So. Burlington, Vt.
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fast68plymouth Offline
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Quote:


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?




yup....thats exactly what i mean


68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads






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