building a flow bench

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evil16v
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building a flow bench

#1 Post by evil16v » Thu Sep 11, 2008 12:19 pm

I am in the process of building a flow bench. My plans show using thin sheet metal for a rotating orifice plate(several sizes to choose from). I think it looks kind of hokey. not o mention sheet metal doesn't machine very well. I was thinking of instead using 1/4" Plexiglas and boring my orifice holes on the Bridgeport. As long as leave my edges sharp and I am having it flowed for actual flow by a machine with a traceable calibration.... ya suppose that would be problem?
Rob
'70 GS Stage 1, 466 BBB, 11:1,wiesco pistons, stock rod, ported Edelbrock heads, 1.55 rollers, single plain intake, 950 Quickfuel, aeromotive ss pump, TH400, 9" PTC converter, 3.90 12bolt, NOS Mini, NX Single entry Crossbar

mytmouz
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Re: building a flow bench

#2 Post by mytmouz » Thu Sep 11, 2008 1:16 pm

Most of the ones I've seen are Plexi...
Trucks are for haulin...

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stroker1
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Re: building a flow bench

#3 Post by stroker1 » Thu Sep 11, 2008 2:01 pm

You can use sheet metal if ya want, but if I was going to use metal it would be stainless or aluminum so the surface dont rust.

Most of them are made from lexan or plexiglass. Personally I would rather have mine made from lexan incase I misplace it and it gets stepped on or something gets sat on top of it.
'87 S10 stock suspension, Caltracs, 9" rearend, 1.82 Glide, 383 SBC,
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JohnDougherty
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Re: building a flow bench

#4 Post by JohnDougherty » Fri Sep 12, 2008 12:21 am

The orifice plate in my SF-600 is metal. Gold anodized. The plenum can reach temperatures over 150+ degrees in the exhaust flow direction. Not sure if you would warp a plexiglass orifice or not.
Have you seen this deal?
http://www.audietech.com/flow-quik/what-it-is.html
You can build a plenum / air box and get a couple of Grainger vacuum motors. The flowquik is accurate and fairly inexpensive.

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evil16v
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Re: building a flow bench

#5 Post by evil16v » Fri Sep 12, 2008 12:41 pm

I don't think it will bother the plexi at that temp. I am going to have the orifice flowed on a flow bench with a traceable calibration, to calibrate my bench anyway. I am going with a u tube manometer and an inclined manometer. most of the parts I already have laying around. th major outlay of money was the 12 vacuum motors and 4 sheet of mdf. I got lucky on th vacuum motors... got them through a surplus place at 16 bills each. the mdf was 25 a sheet.
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Flow-Bench.JPG
Rob
'70 GS Stage 1, 466 BBB, 11:1,wiesco pistons, stock rod, ported Edelbrock heads, 1.55 rollers, single plain intake, 950 Quickfuel, aeromotive ss pump, TH400, 9" PTC converter, 3.90 12bolt, NOS Mini, NX Single entry Crossbar

HAULIN' IT
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Re: building a flow bench

#6 Post by HAULIN' IT » Fri Sep 12, 2008 11:41 pm

Evil, Sounds/looks like the old MSD bench? Do yourself a favor & check out...www.tractorsport.com. There are some sick individials on there & a bunch of great ideas. May alter your thoughts on a few things. Lorne

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evil16v
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Re: building a flow bench

#7 Post by evil16v » Sat Sep 13, 2008 12:26 am

will do. :thumb:
Rob
'70 GS Stage 1, 466 BBB, 11:1,wiesco pistons, stock rod, ported Edelbrock heads, 1.55 rollers, single plain intake, 950 Quickfuel, aeromotive ss pump, TH400, 9" PTC converter, 3.90 12bolt, NOS Mini, NX Single entry Crossbar

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evil16v
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Re: building a flow bench

#8 Post by evil16v » Sat Sep 13, 2008 12:32 am

looks good... i have a registration request in
Rob
'70 GS Stage 1, 466 BBB, 11:1,wiesco pistons, stock rod, ported Edelbrock heads, 1.55 rollers, single plain intake, 950 Quickfuel, aeromotive ss pump, TH400, 9" PTC converter, 3.90 12bolt, NOS Mini, NX Single entry Crossbar

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evil16v
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Location: N.E. Kansas

Re: building a flow bench

#9 Post by evil16v » Sun Sep 14, 2008 2:13 am

Oh Lordy..... mods mods mods mods.... good thing i'm tech junkie.
Rob
'70 GS Stage 1, 466 BBB, 11:1,wiesco pistons, stock rod, ported Edelbrock heads, 1.55 rollers, single plain intake, 950 Quickfuel, aeromotive ss pump, TH400, 9" PTC converter, 3.90 12bolt, NOS Mini, NX Single entry Crossbar

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evil16v
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Location: N.E. Kansas

Re: building a flow bench

#10 Post by evil16v » Sun Sep 14, 2008 2:17 am

HAULIN' IT wrote:Evil, Sounds/looks like the old MSD bench? Do yourself a favor & check out...www.tractorsport.com. There are some sick individials on there & a bunch of great ideas. May alter your thoughts on a few things. Lorne
AND Yes... THANK YOU for the link this i VERY helpful. and answered my question by the way. the orifice DOES need to be a SHARP edge. I may till use a plexi wheel and mount sharp edge plates in it. the plexi can get to seal good and consistant, but still have an easy change over.
Rob
'70 GS Stage 1, 466 BBB, 11:1,wiesco pistons, stock rod, ported Edelbrock heads, 1.55 rollers, single plain intake, 950 Quickfuel, aeromotive ss pump, TH400, 9" PTC converter, 3.90 12bolt, NOS Mini, NX Single entry Crossbar

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