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Old 12-08-2003, 11:03 PM   #16
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Quote:
Originally posted by 97 Z3 2.8
Thanks Tom.

Bry,
The manifold holds a larger air restriction and any other single stock part. Headwork will surely help, but free-ing up the major restriction will help you to reap the most benifits. The trick is to upgrade everything from CAI, MAF, TB, - ASC unit, manifold, injectors, Cams, headers, and then you will need headwork to make it really flow. The stock ports are a pretty good design from the factory, although not what the S14, S50B32 ports are. Remember though, these are all hand built engines, where our's are not.

Sorry to get a little "testy on you earlier. You're right, I should've given a little more detail.


Bill
Cool.

I was actually speaking from experience seeing as how I had installed the BMP multi-throttle intake on the M42 before. The only other modifications done at the time was a CAI, chip, throttle body and exhaust. When we tested the car it showed no significant gain. Sure it pulled hard at 5000+RPM's, but there was virtually no power below 4000RPM, which means in the end the car was generally slower. Like Tom said, it shows huge improvements on the track mainly because you always shift at higher RPM's. But in my opinion, the "BMP multi-throttle intake manifold" is not suitable for steet use, which is what the thread was originally about. I know if properly tuned a multi-throttle intake manifold will give you some nice gains. However, like I said before, is it really worth the $6K? I haven't seen the BMP intake in any BMW with headwork, so I can't say from experience whether or not it's actually worth the money. But if you plan to install this particular intake without any headwork? Not worthit.

No worries about before.

Bry
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Old 12-09-2003, 04:45 PM   #17
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I'm guessing you probably killed alot of torque in that set up.... same as the M50 swap without proper tuning.
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Old 12-09-2003, 05:38 PM   #18
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Just a thought...but i have seen an E36 318i in Thailand running motorbike carbs on a custom manifold and although i dont know more details the car was putting 146bhp at the wheels while the guy mentioned something about the whole thing not costing too much while also not requiring too much work!!!!It did sound awesome though and went really good too plus it looked completely insane!!!!!!!
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Old 12-10-2003, 12:42 AM   #19
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Those guys do some prett crazy stuff. It could be done, but much more tuning than a custom designed kit.
My partner and I are actually working on a individual design that has absolutely no air restriction at WOT.
Anyone want to invest some sub debt?

Bill
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Old 12-10-2003, 01:14 AM   #20
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Quote:
Originally posted by 97 Z3 2.8
Those guys do some prett crazy stuff. It could be done, but much more tuning than a custom designed kit.
My partner and I are actually working on a individual design that has absolutely no air restriction at WOT.
Anyone want to invest some sub debt?

Bill
I wouldn't mind some more info, PM or email me if you don't want to explain here if possible, thanks.
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Old 12-10-2003, 02:28 AM   #21
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I would also be interested Bill. Pm or email me as well.
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Old 12-11-2003, 12:00 AM   #22
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Lightbulb carbies

you can use motorcycle carbs, on a lot of stuff. i was trying to put triple webers (three side draft carb) on a land cruiser motor, and saw this intake and thought maybe for the bimmer. the key is setting up the intake for acoustics and reverberating pressures. it really isnt that difficult. i have just resently moved into fuel injection, other than toyota stuff, thats why i bought the bimmer in the first place. it is funny people think a lot of myths about engines are true but they end up not being. like when you have shorter runners (the intake path) generally in means high horsepower in the mid to upper end and longer ones more torque down low. this can all be disproved with motorcycle motors. my bike has a keihin carb, when i put that on it i accually had to make the intake longer get any kind of extreme power increase, besides nitrous (lets not get started). that is why you can put keihin carbs on cars and get exteme power up to 60% increase but you have to set it up for the application. most of the time you set in up as if you have four engines for a four cylinder, six for a six, etc. just like i was having to jet the webers for six cylinders each one had its own runner. with this manifold you wouldn't have to jet it because it is fuel injected that would be sweet. i have decided not to go with it unless i stroked the motor anyway, its f$$kin' expensive. it would be cheeper to build it. anyway thought ya'll (texas thing) would like this pic with motocycle carbs on a car engine it is a datsun 510 i think.
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Old 12-11-2003, 12:02 AM   #23
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anyway there are cheaper places to buy this stuff http://www.twminduction.com/Throttle...leBodyFAQ.html i you wanted to.
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Old 12-18-2003, 10:36 PM   #24
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How about the gains of a multi throttle body intake set-up on a turbo charged car with tuning. I would think they would be much more significant then in a N/A motor. I always thought about what the mutli throttle body intake set-up would do on my turbo 325i, because the M20 intake manifold is really restrictive. Any thoughts
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Old 12-18-2003, 11:11 PM   #25
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It`s tricky doing a proper box for the velocity stacks for a turbo application, but it`s been done and WHOO there is a hug diff!

With some headwork, ECU work, dyno and just individual throttles, it`s like a small shot of NO2 anyway. Gians are crazy.
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Old 12-18-2003, 11:22 PM   #26
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Thanks the reply big bore. Dbilas dynamic makes the mutli throttle body set-up i was looking at for the M20. Its expensive 2,700, but still cheaper the the other route i was looking at. So theres one person who says the gains are alot better with a turbo application. Anybody else
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Old 12-19-2003, 01:58 PM   #27
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Thinair, duffy 325,

Sorry about the late reply,
I haven't been on this thread since my last post above.
I'd love to share info, but this idea is so new, so custom -it has never been tried on a car (to the best of our knowledge) that I really can't get into any detail on it. We're in the R&D phase right now, but we both have day jobs so it will take some work to get a working example built. It should be pretty wild once we have a complete unit....

Sorry for the late reply,

Bill
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