Anyone have a Flowbench?

I'm (still) in the process of making mine.. will post pics soon.

Any interest?

Yeh, really, I hear it's a vacuum cleaner on suck with a rubber mat under it....and so to figger out how to hook a vacuum/pressure? gauge to measure the flow??

read something on it years ago....

I wish it was that simple! I have 8 (eight!!!) vacuum motors; this one is going to be capable of pretty high flowrates.

I had one years ago that I built, with two big motors in it but they weren't the right type and it would only pull about 2" of static vacuum. These are capable of pulling a LOT more (closer to the 28" standard.)

The calculations are a pain; I made a spreadsheet years ago for it.

Here's a drawing of it.. I have the basic box built and the intake/exhaust selector made.

So, that's why you need room in your garage

That's gonna be awesome.

Nice. I read a couple of things about those diy flowbenches, but it was my opinion that it would be to much to build one, just to do 1 head. If I would start a corvetteshop that would be something else, but the market is to small here.

and even then, few people interested in actual flow data. Most will buy edelbrock because it's in the magazines

True, but this group isn't the type to just throw Edelbrock heads on is it? :beer:

The design is changing a bit; I'm not going to get so complex as far as the tubes go; there are 1.5", 2" and 3" tubes - I'm going to stick with that but not make the complex switching mechanism between the three. The intake/exhaust board is already made; I just need to mount the motors and finish putting the cabinet together.

Wiring is going to be interesting, for sure - it's going to need 220v easily. (Two sets of 110v to split up the amperage.)

Following with interest here. Can't find anyone with one in my area that will set up for anything which strays off the basic menu.

flow bench & porting links you might use


http://www.chevyhiperformance.com/techarticles/95518/

http://www.4cycle.com/karting/html/flow_bench.html

http://www.watermanracing.com/flow_bench.htm

http://www.pontiacpower.com/FlowBench.htm

http://www.performancetrends.com/pfa.htm

http://www.performancetrends.com/ez_flow_system.htm

http://www.mercdog.com/motorsports/68_flowbench.html



http://www.performancetrends.com/ez_flow_system.htm

http://www.aces.edu/~gparmer/articles/flowbench/

http://www.chevyhiperformance.com/techarticles/95518/

http://www.sa-motorsports.com/diyport.shtm

http://victorylibrary.com/mopar/bench.htm

http://www.fordmuscle.com/archives/2006/12/MakingMolds/index.php

http://www.diyporting.com/molds.html


1) open throat to 85%-90% of valve size
(2)cut a 4 angle seat with 45 degree angle .065-.075 wide where the valve seats and about .100 at 60 degrees below and a .030 wide 30 degree cut above and a 20 degree cut above that rolled and blended into the combustion chamber
(3)blend the spark plug boss slightly and lay back the combustion chamber walls near the valves
(4)narrow but dont shorten the valve guide
(5) open and straiten and blend the upper two port corner edges along the port roof
(6) gasket match to/with intake and raise the port roof slightly
(7) back cut valves at 30 degrees
(8) polish valve face and round outer edges slightly
(9)polish combustion chamber surface and blend edges slightly
(10) remove and smooth away all casting flash , keep the floor of the port slightly rough but the roof and walls smoothed but not polished.
(11) use a head gasket to see the max you can open the combustion chamber walls
(12) blend but don,t grind away the short side radias




http://www.eecis.udel.edu/~davis/z28/buildup/plenum/

http://www.babcox.com/editorial/us/us110128.htm

http://www.diyporting.com/Shrouding.html

http://www.babcox.com/editorial/ar/eb120121.htm

any updates on the build ??