Steven
I havnt been able to figure out Hughes's CFM #s either... My SF600 cant
replicate their results. Im fully calibrated too. My results for F&B
products (very high flow V8 TBs) show the stocker wheezing out at 636 CFM @
25" water, the Old F&B stage one flows 745 @ 25" water, and the billet flows
790cfm @ 25" water. IAC ports blacked. Id normally test at a lower vacuum
(19"water), but I was trying to replicate the Hughes test #s. Maybe Hughes
is flowing the TBs with the IAC ports WFO... If thats the case then Ill
start porting the IAC for super high performance idle characteristics...
J.K... I already port the IAC...yuk yuk yuk but seriously, If you add IAC
flow, add about 100cfm. Thats why flow bench #s are so subjective user to
user. Alas, I am awash in a sea of data and decisions....
Bruce
----- Original Message -----
From: Steven T. Ekstrand <cyberlaw@earthlink.net>
To: <dakota-truck@BUFFNET.NET>
Sent: Saturday, October 07, 2000 6:45 AM
Subject: DML: Re: Re: Intake manifold
> | > You were right about losing a little on the bottom end though. Hughes
> TB
> | is
> | > ok also I guess worth the 165 gets out 750 cfm.
> | >
>
>
> Remember whenever you compare cfm numbers you have to know the testing
> parameters used on the flowbench. For example, sometimes people use 1.5
in
> HG and sometimes they use 3.0 in HG to test flow. Big difference in
> results!
>
> 750cfm seems high, but I don't really know anything about TB's. I've done
> my share of successful race carbs though. I guess thats a lost art now...
> Disassembled my first Holley 4160 at age 2!!! I had some "cool toys".
>
>
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