 New project:Adapting motorcycle Throttle Bodies, this should be "interesting" :) |
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| Qarl |
 Feb 4 2005, 12:30 AM
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#21
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Shriveled member  Group: Benefactors Posts: 5,233 Joined: 8-February 03 From: Florida Member No.: 271 Region Association: None   |
I think the throttle bodies butterfiles connect together with a common shaft.
You might be able to break them apart, adda a spacer and get them to fit perfectly... then reassemble with a modified shaft. |
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| Qarl |
Feb 4 2005, 12:36 AM
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#22
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Shriveled member Group: Benefactors Posts: 5,233 Joined: 8-February 03 From: Florida Member No.: 271 Region Association: None |
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| Qarl |
Feb 4 2005, 09:36 PM
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#23
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Shriveled member Group: Benefactors Posts: 5,233 Joined: 8-February 03 From: Florida Member No.: 271 Region Association: None |
SO??? Who's gonna do it?
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| Mueller |
May 24 2005, 03:36 PM
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#24
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None 
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played with the TB's a little over the weekend...mostly taking them apart somewhat and getting dimensions off of them for different ideas on how to mount them....
Attached image(s) 
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| Mueller |
May 24 2005, 03:39 PM
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#25
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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adapter ideas: (IMG:http://www.914world.com/bbs2/html/emoticons/screwy.gif)
adapter 1....this one would use a hose (see pic) and a clamp to hold the TB to the plate...the factory method is very similar.... the clamp is a special clamp which is smooth on the inside so that it will not damage the hose..... as well as clamping it, the TB has a boss on the side which will be used to bolt on a bracket that will bolt onto the plate for more support....... Attached image(s) 
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| Mueller |
May 24 2005, 03:42 PM
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#26
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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adapter 2....
this one would have a counterbore for the TB to sit inside, an O-ring groove would help for sealing...after assembled, a 2 part epoxy would be inserted inbetween the TB and the plate..the O-ring would prevent the epoxy from leaking past the bottom of the TB. once again, the TB would also be bolted to the adapter via the bracket attaching to the protrusion on the TB... Attached image(s) 
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| Randal |
May 24 2005, 03:56 PM
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#27
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
Nice designs Mike.
Those look much shorter that the TWM units, don't they? We'd better keep you away from the motorcycle folks, otherwise they will steal you away from the Bay area, put you in Japan designing stuff for them. My only question is air. On adapter 1 will the rubber band thing be tight enough, with a clamp, to eliminate air getting sucked in, or does that make any difference? |
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| eeyore |
May 24 2005, 03:58 PM
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#28
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Senior Member Group: Members Posts: 889 Joined: 8-January 04 From: meridian, id Member No.: 1,533 Region Association: None |
Adapter one! Go with what the factory did.
How is the stapler going to be mounted? |
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| Aaron Cox |
May 24 2005, 03:59 PM
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#29
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
rubber:
well they use rubber boots on turbo setups all the time....i would think rubber would be ok in a low pressure/vaccuum zone |
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| Mueller |
May 24 2005, 04:02 PM
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#30
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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QUOTE(Randal) My only question is air. On adapter 1 will the rubber band thing be tight enough, with a clamp, to eliminate air getting sucked in, or does that make any difference? the hose and clamp are designed for turbocharged applications so I have no worries about it...the second plate would be cheaper....the hose (which I already bought) is $25 per foot (min. 1 foot), the stainless steel clamps are $4 each (only bought one so far) not shown is that the adapter plates will be drilled and tapped and bolted to the manifolds from underneath the manifold.... the hardest part will be making the throttle linkage..... |
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| Mueller |
May 24 2005, 04:03 PM
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#31
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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QUOTE(Cloudbuster) Adapter one! Go with what the factory did. How is the stapler going to be mounted? the stapler is for me to hit myself with if I keep taking things apart and not making progress, LOL |
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| MecGen |
May 24 2005, 04:05 PM
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#32
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8 Easy Steps Group: Members Posts: 848 Joined: 8-January 05 From: Laval, Canada Member No.: 3,421 |
Hey Mike
The size of the injector hole/mounts, is this a standard automotive size, or will it be machined to fit ?? This should work, when you get the mounting figured out. My vote is #1, the simpler the better, less things to go wrong... later Joe |
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| Mueller |
May 24 2005, 04:08 PM
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#33
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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QUOTE(JoeSpark) Hey Mike The size of the injector hole/mounts, is this a standard automotive size, or will it be machined to fit ?? This should work, when you get the mounting figured out. My vote is #1, the simpler the better, less things to go wrong... later Joe the seal on the end of the injectors looks very close the stock 914 injectors, however the motorcycle injectors are nice and short...I will be using them..they flow enough for 165+ horsepower so I'll be okay for now...... |
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| Aaron Cox |
May 24 2005, 04:15 PM
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#34
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
these going on the turbo motor or the stroker?
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| jhadler |
May 24 2005, 04:25 PM
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#35
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Long term tinkerer... Group: Members Posts: 1,879 Joined: 7-April 03 From: Lyons, CO Member No.: 529 |
Hey Mike,
Those Wakisaki throttles look great! Let us all know how it works out! With my workload and the imminent expansion of the family unit, I didn't have the time to engineer other TB's to fit, so I broke down and bought the TWM's. But, the good thing is I wound up paying a little less than I would have paid for the cheap cast throttles from CB-Perf. If anyone's thinking of going the way of ITB's, look a the big pony car shops. They deal in volume, so I guess that's why they're more than 30% cheaper than TWM... So, the project continues (slowly), TB's are on the way, and I guess I'll be ordering the MSII when it's available... This is going to be the most non-stock looking, stock motor in a 914... -Josh2 |
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| Mueller |
May 24 2005, 04:43 PM
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#36
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914 Freak! Group: Members Posts: 17,150 Joined: 4-January 03 From: Antioch, CA Member No.: 87 Region Association: None
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QUOTE(Aaron Cox) these going on the turbo motor or the stroker? both...... |
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| Randal |
May 24 2005, 04:57 PM
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#37
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Advanced Member Group: Members Posts: 4,446 Joined: 29-May 03 From: Los Altos, CA Member No.: 750 |
That's pretty cost effective, i.e., a foot will do 3 cars, right? Sure glad I have a set of those NTB's beauties as well! |
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| andys |
May 24 2005, 04:58 PM
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#38
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Advanced Member Group: Members Posts: 2,165 Joined: 21-May 03 From: Valencia, CA Member No.: 721 Region Association: None
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QUOTE(Mueller @ May 24 2005, 01:36 PM) played with the TB's a little over the weekend...mostly taking them apart somewhat and getting dimensions off of them for different ideas on how to mount them.... Mike, You might consider the stock bike manifold rubber bonded aluminum adapters. I'm willing to bet they are a two-bolt pattern type with the correct coupling for the throttle bodies. Transfer the bolt pattern to your manifolds, and you're good-to-go. You may be able to find these aftermarket as well. Andy |
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| xitspd |
May 24 2005, 05:02 PM
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#39
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Technology and Tradition 3.6 and 914-6 Group: Members Posts: 1,305 Joined: 17-November 04 From: Foothills of Mt. San Jacinto, CA Member No.: 3,136 |
Brilliant Mike... Keep us informed with your progress... In Japan there are many exporters of late model bikes and components shipping worldwide (cheap). If your project works, I may be able to help source throttle bodies for you. I will visit Japan again in late Sept.
Dan |
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| Aaron Cox |
May 24 2005, 05:06 PM
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#40
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Professional Lawn Dart Group: Retired Admin Posts: 24,541 Joined: 1-February 03 From: OC Member No.: 219 Region Association: Southern California |
throttle linkage cant be too hard.
mike i had an idea. CB performance sells hex bar linkages that inetgrate into their air cleaner base. its a ~.5" thick piece of cast AL with a post that the linkage pivots off of. can you not use this as the plate for which your TB's will sit on? another thing. does LINK require a MPS type deal? you going to tap each manifold for a vacccuum port? |
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