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S.S. clamps hold on my Velocity stacks
It's possible to have filter material across the opening though. No difference than having an airbox then is it???
I had trouble finding aircleaner foam on my 836.. so I ran them open for a few years, even on the dirt oval.. And EVERONE told me it was bad for my motor and would wear it out, and that THEY would NEVER do that to theirs.. and I got to admit, THEY were right... That damn 836 motor I beat on so many times, only lasted 25 years.. when it really should have gone 27 years...
I made a set for my Kawasaki Z-1 900 carbs. I needed a place to mount the nozzles for the aftermarket accelerator pump nozzles (the carb bells were thin and I needed a more secure mounting point for the nozzles) and the velocity stack were machined to have pod filters mounted to the ends.
Quote from: fishhead on May 12, 2009, 06:23:24 AM I made a set for my Kawasaki Z-1 900 carbs. I needed a place to mount the nozzles for the aftermarket accelerator pump nozzles (the carb bells were thin and I needed a more secure mounting point for the nozzles) and the velocity stack were machined to have pod filters mounted to the ends.Heh, well now you're just plain cheating, adding extra fuel circuits!I love it! Too bad about the interference issues. Did you ever run them on a 750, or just test fit them, and if so how'd they run?mystic_1
Here are the NOS stacks I got from Cycle exchange
Here's a set I made with our rapid prototyper.
Nice work Dave and it's obvious you know your stuff, but I gotta ask, have you done any dialing in on a dyno to see if that length is optimal for a performance increase?
Quote from: bwaller on September 19, 2009, 05:21:36 PMNice work Dave and it's obvious you know your stuff, but I gotta ask, have you done any dialing in on a dyno to see if that length is optimal for a performance increase?Thanks for the kind words, BW. Nope, didn't iterate on stack length.
Quote from: davesprinkle on September 19, 2009, 05:34:03 PMQuote from: bwaller on September 19, 2009, 05:21:36 PMNice work Dave and it's obvious you know your stuff, but I gotta ask, have you done any dialing in on a dyno to see if that length is optimal for a performance increase?Thanks for the kind words, BW. Nope, didn't iterate on stack length.nice indeed Dave, cost involved?I went through some heavy pain due to the effect of untried velocity stacks, but those were put on 26VM which originally hava a big step in the bore.whoever wants is invited into this stacks thread in the perf forumhttp://forums.sohc4.net/index.php?topic=58658.0to the rest of you guys, I have to wnder about the shapes and sharp edges in some of the stacks you posted. Gordon Blair claims that this is the single most important factor, taper is only secondary ....http://www.profblairandassociates.com/pdfs/RET_Bellmouth_Sept.pdf
http://www.jntperformance.com.au/index_c269035_0.htmlI found a place that sells one at a time as I only needed one for my lamp project. Dan
Davesprinkle, if someone came to me to get those made (providing they are like most stacks, ie no offset), I would charge less than 100 each, & do it on a manual lathe.. Some CNC shops are waaaaaayyyy outa hand.. when was it?..bet they are more realistic in price, this year.. The offcenter part, could be done in a 4 jaw, or fixture on a lathe maybe..
Quote from: 754 on September 19, 2009, 07:45:44 PMDavesprinkle, if someone came to me to get those made (providing they are like most stacks, ie no offset), I would charge less than 100 each, & do it on a manual lathe.. Some CNC shops are waaaaaayyyy outa hand.. when was it?..bet they are more realistic in price, this year.. The offcenter part, could be done in a 4 jaw, or fixture on a lathe maybe..indeed, just as I was going to say that the stock plastic ones are expensive enough at what? 60 bucks each?nice friends at work you have dave!
