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Old 05-20-2013, 03:01 PM   #681
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or make lowend torque..


but who needs lowend torque, right?
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Old 05-20-2013, 06:10 PM   #682
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Mine seems to crack every 4 or 5 events. I have tried bracing, having it welded by a shop that builds 6 second 200+ MPH 275mm radial cars and a few other things. I have just came to the conclusion that I will just have to take the manifold off every 4 or 5 events and re weld it. It made too much power to go back to a stock manifold.
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Old 05-20-2013, 06:15 PM   #683
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I remember earlier in the thread everyone was making fun of someone who wanted to use silicone couplers.

Who's laughing now?
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Old 05-20-2013, 06:17 PM   #684
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Quote:
Originally Posted by TNTUBA View Post
Mine seems to crack every 4 or 5 events. I have tried bracing, having it welded by a shop that builds 6 second 200+ MPH 275mm radial cars and a few other things. I have just came to the conclusion that I will just have to take the manifold off every 4 or 5 events and re weld it. It made too much power to go back to a stock manifold.
Nooooooo

Did you gusset it or just brace it?
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Old 05-20-2013, 06:27 PM   #685
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Nooooooo

Did you gusset it or just brace it?
Both.
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Old 05-20-2013, 06:29 PM   #686
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Both.
Damn it!

I am going sheet metal intake if I have more problems!
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Old 05-20-2013, 06:32 PM   #687
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Damn it!

I am going sheet metal intake if I have more problems!
Its probably the way to go, even for the weight reduction benefits alone. Our stock manifolds weigh a ton, I'm sure the honda isnt much lighter. And with a sheet metal intake you can get real trumpets the go into the plenum and get off the walls.
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Old 05-20-2013, 06:45 PM   #688
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I have no idea what I'm doing with my life.
As a Honda ITR manifold owner, this is what I think every time I look at the engine
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Old 05-20-2013, 06:53 PM   #689
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Quote:
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Its probably the way to go, even for the weight reduction benefits alone. Our stock manifolds weigh a ton, I'm sure the honda isnt much lighter. And with a sheet metal intake you can get real trumpets the go into the plenum and get off the walls.
So who calculates the correct measures for proper group B style intake manifold?

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Old 05-20-2013, 07:07 PM   #690
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Quote:
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Its probably the way to go, even for the weight reduction benefits alone. Our stock manifolds weigh a ton, I'm sure the honda isnt much lighter. And with a sheet metal intake you can get real trumpets the go into the plenum and get off the walls.
You're wrong. Its a lot lighter
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Old 05-20-2013, 10:00 PM   #691
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I remember earlier in the thread everyone was making fun of someone who wanted to use silicone couplers.

Who's laughing now?
Why did people shoot it down so much? Will the rough join disrupt the flow? I remember seeing photos of Group B rally cars with couplers mid runner. So if properly braced is reliability really an issue?
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Old 05-20-2013, 10:06 PM   #692
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Quote:
Originally Posted by muoto View Post
As a Honda ITR manifold owner, this is what I think every time I look at the engine
Haha. Luckily my sheet metal intake is fine...for now. But, yes, I cringe when I look at my lump of **** and consider killing myself. Even if it is coming along.
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Old 05-20-2013, 10:24 PM   #693
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I am starting a composites company. I plan on starting with fender flares and other smaller items but a composite intake manifold is definitely on the list. Maybe it needs to be at the top? I can do carbon fiber runners like the sheet metal ones, actually I plan to make the whole thing out of carbon except the flanges. Thoughts? I was going to copy the Blox/mazda bastardized mani.....
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Old 05-20-2013, 10:27 PM   #694
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thoughts? cool story bro
do it
you're only the 10th person to say something like that. seriously

others, like travis from boundary engineering, gave up long ago
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Old 05-20-2013, 10:33 PM   #695
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Now that i see pictures.
Was the manifold even post stress relieved? Was it preheated? Does this epic famous welder know what he's welding, and how / what to pre / post heat it to? Do we know what this cast aluminum even is? With that being said, not all aluminum can be heat treated. But very little preheat is never a bad idea.

One of the first things i learned (i don't build million dollar custom one off race cars at a high end fancy shop somewhere, so who knows) is that in steel you can make the weld as strong as the metal you're welding to. But in aluminum that's not always the case(your cracked welds are a fine example).
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Old 05-21-2013, 01:00 AM   #696
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Quote:
Originally Posted by Amellrotts View Post
I am starting a composites company. I plan on starting with fender flares and other smaller items but a composite intake manifold is definitely on the list. Maybe it needs to be at the top? I can do carbon fiber runners like the sheet metal ones, actually I plan to make the whole thing out of carbon except the flanges. Thoughts? I was going to copy the Blox/mazda bastardized mani.....
I'll give you the simple version. Runners 16" long. Machine the flange out of aluminum with raised bosses for the CF runners to bond to, set it up to use viton oring seals on the ports. Hard anno the flange. Bond the formed CF runners to the flange. D shaped tapered plenum with the runners ending in velocity stacks an inch or so into the plenum. I would make the stacks a separate piece from the runners and the plenum, bond the stacks to the runners and the runners to the plenum. Throttle body flange, just like the head flange. Finish coat of resin to ensure minimal porosity. Its the simplest way to make a pimpy CF manifold that will absolutely seal like the dickens. Leaking custom composite intakes have been the bane of my existence before.
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Old 05-21-2013, 09:15 AM   #697
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Leafy,
Why would you make the velocity stacks a separate piece? I plan to mold it all in one piece. The rest is pretty much as I planned. No I guess I will go out and work on my spray booth (I have a chopper gun and need a spray booth, plus is will double as a paint booth).
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Old 05-21-2013, 09:37 AM   #698
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Quote:
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Leafy,
Why would you make the velocity stacks a separate piece? I plan to mold it all in one piece.
Um, so you can actually assemble it. The holes in the plenum are going to be runner sized, the runners will be too long to slip in from inside the plenum an the stacks wont fit through the hole. And trying to put the runners into the plenum before its formed, then forming it, would be too complicated IMO. This way all your molds, besides the stacks, are simple re-usable plug molds that should be easy to vac bag over.
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Old 05-21-2013, 09:47 AM   #699
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My plan was to ......you know what, I don't want to hi-jack this great thread. I will start a new one soon. Thanks for your ideas!
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Old 05-21-2013, 02:34 PM   #700
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I am taking this serious!

Next up bracing. Not taking any chances!!!
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