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Homemade M112 for my LS1 BMW

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Old 01-26-2012, 03:34 PM
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more videos!! Some one has got to make a manifold kit like this!!
Old 01-27-2012, 07:26 AM
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such a great build, making me think i gotta go harass one of my buddies who can actually weld.....
Old 01-27-2012, 11:57 AM
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Originally Posted by 89LS1FOXER
more videos!! Some one has got to make a manifold kit like this!!


sounds awesome. have you done any tuning yet or is it still running on the stock tune?
Old 01-27-2012, 01:40 PM
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sick build .
Old 01-28-2012, 02:54 AM
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Def Got that blower spinning! Good work!

After you got done welding the intake on the engine did you send it to heat treat? How much did it pull? Not enough that it couldn't seal tight?


Thats one bad *** sleeper you got there... any ideas what you plan on running in the 1/4?
Old 01-29-2012, 08:38 PM
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Nice work! You could sell the heck out of those intakes. Are you gonna dyno it?
Old 03-07-2012, 08:27 PM
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This is awesome, very clean DIY work!
Old 04-17-2012, 09:25 AM
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http://www.youtube.com/watch?v=nQRhtuVV9I4
Old 04-17-2012, 07:36 PM
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just sick
Old 04-17-2012, 08:06 PM
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Love it! What a great sound, too.
Old 04-17-2012, 11:57 PM
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dyno numbers after tune?
Old 04-18-2012, 03:19 AM
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So on a M122 a intercooler would be highly preferred if you were to build your own intake manifold? I understand that it will help cool rather well, how much power are you leaving on the table if you don't intercool the manifold?
Old 04-18-2012, 04:01 AM
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Awesome build/setup!
Old 04-18-2012, 04:38 AM
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Weak sauce now sell it to me and move on.....LOL
Old 04-18-2012, 07:46 AM
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Originally Posted by 91sonomast
So on a M122 a intercooler would be highly preferred if you were to build your own intake manifold? I understand that it will help cool rather well, how much power are you leaving on the table if you don't intercool the manifold?
If you are running lower boost then an intercooler is not needed as much. I am guessing that the OP is only running somewhere between 7-9psi. While an IC can still serve as a benefit, it is not like a significant amount of power is being left on the table at this boost level. If he cranked it up without doing an IC or injecting water or alky then IAT's would skyrocket and hp gained per psi of boost would drop like a rock.
Old 04-18-2012, 09:03 AM
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Thanks guys, the car has not been dyno'd yet. I have been tuning it on the street for now. I will get it dyno tuned after I buy a alky control kit.

I am running around 10psi and if I beat on it for a while(like I did making that video) intake temps will go up to 180+*. I will definitely be running a 100% meth injection in the very near future.
Old 04-18-2012, 10:30 AM
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that thing has all the right stuff. done at home and sounds wicked and makes power and is a slight sleeper. WELL DONE!
Old 04-18-2012, 10:57 AM
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I must say, that is one nice build you got there. Congrats man. Credit well deserved here.
Old 04-18-2012, 11:40 AM
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Originally Posted by rocket5979
If you are running lower boost then an intercooler is not needed as much. I am guessing that the OP is only running somewhere between 7-9psi. While an IC can still serve as a benefit, it is not like a significant amount of power is being left on the table at this boost level. If he cranked it up without doing an IC or injecting water or alky then IAT's would skyrocket and hp gained per psi of boost would drop like a rock.
With this and his comment below yours I am seeing that an IC/heat exchanger would be more preferred and a worthwhile investment, I am not knocking the OP's design at all, different strokes for different folks. The only issue in a company building a Eaton intake for the LSx platform that I see is I'm doubting highly that a M112 and M122 will bolt up the same, and then you have the issue of pulley's. For truck accessories you will need different S/C placement than vette or camaro accessories. With those two problems resolved it could be done. You would most likely have to build a mani for say the M122 in a truck and car configuration and that be it. The M122's are all over ebay for $550-$1100, so they are readily available, but if you start building this, how long will that last until either a) they become HARD to find. b) someone gets wise to what is going on and the prices start rising to the point that buying a Maggie is just as economical.
The profit margin for these intakes I doubt would be very high and a business is founded to make money, not break even, they have to beable to buy equipment to grow and build new parts to meet needs and demands. If you start pricing for just the lower manifold with a IC in it and NOTHING else, no bolts, no hoses, no pulley's, just the base with IC connections and injector bungs, then from that point it's a "build it yourself" setup for say.....$1000, a lot of people aren't going to be interested. But I believe that would be about where the prices would start for a intake manifold because of materials, labor, design, R&D, then putting a few dollars in their pocket. Then the consumer has to add $550-1100 for the S/C, the cost of pulleys, cooling system costs and related items, the consumer will very easily get $2k+ wrapped up in this, which is cheaper than a Maggie, but people like simple and easy.
Old 04-18-2012, 01:39 PM
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Nice fab skills.


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