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Re: Turbo this baja discusion
Posted: Tue Apr 13, 2021 4:15 pm
by buguy
I would do some more research. It seems like i remember reading somewhere about velocity stacks in the plenum. If i recall it mentioned something about the idea height. I want to say it was something like 3/4" into the plenum, but i really don't remember now. I know i always read to make the intake like a funnel. Have it taper down in size to the head intake opening size.
Re: Turbo this baja discusion
Posted: Tue Apr 13, 2021 4:36 pm
by terryly
Hi panel that is a good point I was just wondering if there would be any benefit with a lower revving motor. Do plenums usually have stacks ? I am thinking they will help the air to turn the corner and straiten it out before entering the intake manifolds. Hell who knows I am just winging it here haha
As to your question I drilled and tapped the plenums to be bolted and gasketed to the btm of the plenums. The reason I did this is. When I had a friend and sponsor from the old IMCA modified race car team look at them he said it may be a little tricky to get his tig gun in at the inner closest flanges. He owns an aluminum fuel tank and vessel fab shop here in town and is a super nice guy. He is really busy and never really charges me anything no matter how much try to pay him. I know we could just cut the bolt flanges off to make room. He will be welding the end caps and the inlet tube to the top. Really I just wanted to make it easier and quicker for him and should work just as well.
Re: Turbo this baja discusion
Posted: Tue Apr 13, 2021 6:53 pm
by panel
Make sure you pick the right velocity stack though.......It's from the guru himself. David Vizard. Not sure if the rule applies when it's inside a plenum though.
Re: Turbo this baja discusion
Posted: Wed Apr 14, 2021 6:41 pm
by Alexander_Monday
I usually just lurk here given I've been on and off working on mine for over 10 years due to starting my own business. I put bell velocities in my plenum and based them off a research paper I tracked down when I was planning. I'll see if I can't dig it up.
Re: Turbo this baja discusion
Posted: Wed Apr 14, 2021 9:37 pm
by terryly
That would be great Thanks
Re: Turbo this baja discusion
Posted: Fri Apr 16, 2021 11:41 am
by Alexander_Monday
Here is one of the articles, the other one I can no longer find online and it was lost with a hard drive crash many years ago on a computer I don't have anymore.
http://www.profblairandassociates.com/p ... h_Sept.pdf
Re: Turbo this baja discusion
Posted: Wed Sep 15, 2021 5:23 pm
by terryly
Thanks Alexander_Monday interesting article. sorry for the late reply. I thought I had replied to you after reading that excellent article back in April ..... must not have submitted it or got distracted Thanks again I have the empi stacks bolted in the plenums now Not real happy with them and will get some short fat ones with an elliptical profile entry {what I took from that article}
Re: Turbo this baja discusion
Posted: Wed Sep 15, 2021 8:00 pm
by terryly
Re: Turbo this baja discusion
Posted: Thu Sep 16, 2021 2:52 am
by V8Nate
Turned out great excellent work!
Re: Turbo this baja discusion
Posted: Thu Sep 16, 2021 4:46 pm
by buguy
I don't remember, but i can easily check the TB pin out for you tomorrow.
Re: Turbo this baja discusion
Posted: Thu Sep 16, 2021 8:10 pm
by terryly
Thanks buguy I found the info I needed
Re: Turbo this baja discusion
Posted: Fri Sep 17, 2021 2:26 am
by buguy
Awesome! Your getting close!