Honda intake manifold
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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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.
Did you gusset it or just brace it?
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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.
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Junior Member
Joined: Jan 2010
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From: Helsinki, Finland
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You're wrong. Its a lot lighter
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Junior Member
Joined: Mar 2012
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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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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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Joined: Oct 2011
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From: Detroit (the part with no rules or laws)
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).
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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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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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).
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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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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