M20 intake manifold design thread
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Serious note. I have plenty of materials now.
I have 2" 6061 with .125 wall.
I will be Welding 1" of tubing onto each runner, porting the piss out of it to make sure it's a smooth transition. And then from there I can weld to clean aluminum.
My plan is to make a die for a tapered inlet from the plenum, and I will use the 2" tubing.
7 degree taper? And then I will machine little radii for the first part of the velocity stack.
Or I might make a die to form a velocity stack? Not sure.
Also. I built a brake booster delete out of 1x4x4 aluminum and I think it's going to work awesome. It's installed but the car is not running yet. This leaves LOTS of room to play with. We will be doing an itb adapter soon as well.
I changed the pedal ratio to 6.2:1.
sk8 or die
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For the prototype, you guys should be thinking about the ability to swap pieces easily. Let's say your plenum is the right size but you need to swap out your stacks, you should be able to remove them and replace them with the new pieces. The finished product should be one piece to reduce turbulence. Prototyping is always easier when you can take it all apart.
My .02
I'll powder coat the prototypes for you guys if you'd like.
E91 328xi - F15 X5 40e - Hopes and dreams of eventually having a cool car
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For the prototype, you guys should be thinking about the ability to swap pieces easily. Let's say your plenum is the right size but you need to swap out your stacks, you should be able to remove them and replace them with the new pieces. The finished product should be one piece to reduce turbulence. Prototyping is always easier when you can take it all apart.
My .02
I'll powder coat the prototypes for you guys if you'd like.
I like the idea.
Man I just want to have a huge piece of aluminum to play with for free. Id totally have a modular intake by now haha.
I would have to say plenum design is probably the hardest part no? I think I should weld a base plate right before the stacks, and I could have the plenum bolt on and off? Man that might be a bit difficult to manufacture...
I can't wait to get these rolling!!
sk8 or die
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one thing I would implement is a fit bolt/precision shoulder bolt screw/dowel pin for repeatable fitment when they are port matched.
I believe the S14 engines have something similar.
Hmm. That makes me think I should just Cnc port the welded part.... Much easier..
sk8 or die
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I think an m42 one should be next=P
I would love to build one! Have a spare m42 laying around? Lol.
I have an e36 shell ready for mockups too.
Oh and we have 5 e30's now...
Anyone interested in a lsx e30 with a zf 5 speed? I wonder how much I could sell one for..
Holy tangent.
Also that was my first ever intake runner weld. And that's welding cast alum(not cleaned even) to 6061. I'd say it turned out well! The rest of the runners look even better.
The next manifolds will be welded with some actual cast rod. Cronatron 510t I believe it's called. And more time will be out into prep.
I'm thinking sand blast an powder coat? Or wrinkle coat?
sk8 or die
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Zero updates from me. But hey I have a good start and I might be able to finish it but one question.
I can mock it up using an eta head right?
And hey Jeff wanna help me design to manufacture some velocity stacks? Haven't found a cheap way to build them yet ha.
Sent from my iPhone using Tapatalk
sk8 or die
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this should be awesome. the dbilas itb intake is pretty much the sexiest thing you can bolt to an e30, so anything that even aspires to it will be awesome as well.
Dan
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Aloha,
Am glad you guys taking on this topic and no, am not trolling, just glad to even if in a comical way manage to stir the pot.
running dbilas 44mm itb's and the plate that mate it to the head. it has been shown that 40mm is more than enough for 885 heads.
Here's the short of it, using pvc because ...
- ease of manual-ability
- 40mm inner dia (optimal for 885 heads)
- it withstands n/a temps just fine
- you can't blow it apart with n/a psi.
- super light
- creases are minimal and super easy to fill in.
you guys should get transarent pvc pipes and plexy glass, make a box, experiment more I say.
see with your eyes what the gazillion of unanswered equations your brains can't visualize.
a aint a sin for sponge bob's sake !
1st) setup previously posted here, i concur, crap and thanks for constructive criticism.
2nd) 1/2/3 + 4/5/6, 13 inch runners, sounded nice, ran well.
3rd) 1/3/5 + 2/4/6 (video) resonance at 10 seconds, cutting off at 4200 rpms, on better ms2 itb, tune now.
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