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> New project:Adapting motorcycle Throttle Bodies, this should be "interesting" :)
Mueller
post May 24 2005, 05:31 PM
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QUOTE(andys @ May 24 2005, 03:58 PM)

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

I've looked at the intake flange you speak of.......I cannot find them used (normally sold with the motor)...and brand new they are $35.99 each.....(I'd need 4 of those puppies...ouch)

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Dan,

I would be nice to have it so that minimal machining needs to be done, this way it would open the door for more conversions.....I'm sure it'll work, just how much effort it'll be is another story (IMG:style_emoticons/default/smile.gif)
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DBCooper
post May 24 2005, 07:33 PM
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Cool. I'm doing the same thing using Suzuki GSXR throttle bodies on a Ford Ztech engine going into a Lotus Seven replica. If you want to see some other people's projects check out some of the links in the thread at :

http://www.d-series.org/forums/showthread....57&page=1&pp=20

They're ricers, but it all works the same. You're right that the big boo is going to be the linkage. It's lots easier on an inline engine. The common way to get them onto manifolds is using silicone hose and clamps on manifold stubs, the way they were attached to the bike motor, but that won't keep the carbs rigid enough to keep them in sync using VW/914 style manifolds. You might want to check out using dual carb type cable linkage for a BMW R-series motorcycle or, if I remember right, some older British sports cars like Spitfires and TR-3's. Seems the cable might be easier.
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rick 918-S
post May 24 2005, 07:35 PM
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I was wondering what happened to this project. This is a cool low buck setup. K.I.S.S. Mike. This will work. Don't try to re-invent the wheel. Just make it work. (IMG:http://www.914world.com/bbs2/html/emoticons/clap.gif) I have a good 1.7 I would love to try this on.
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andys
post May 25 2005, 10:41 AM
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QUOTE (Mueller @ May 24 2005, 03:31 PM)
QUOTE (andys @ May 24 2005, 03:58 PM)

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

I've looked at the intake flange you speak of.......I cannot find them used (normally sold with the motor)...and brand new they are $35.99 each.....(I'd need 4 of those puppies...ouch)





Mike,

I'll have to dig through some stuff in hope of finding an aftermarket source for the boot adapters. In my mind, I can still visualize the catalog page showing them; it's just been a lot of years since I messed with this stuff. Try Dennis Kirk, or Chaparral. That internally molded-in o-ring for the rubber boot is a must have in order to keep the throttle body from popping off, though I have seen people use a short straight section of hose with clamps....not pretty.


Andy
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Mueller
post May 25 2005, 01:43 PM
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QUOTE(andys @ May 25 2005, 09:41 AM)
That internally molded-in o-ring for the rubber boot is a must have in order to keep the throttle body from popping off, though I have seen people use a short straight section of hose with clamps....not pretty.

Andy

Andy,

I think a brace similar to the green one here should work to hold the TB's in place along with the hose/clamp parts.


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Randal
post May 25 2005, 02:58 PM
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Mike - Can you make adapter 2 out of the same metal as the TBs and if so couldn't could you just bronze or weld the two together?
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andys
post May 25 2005, 03:27 PM
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QUOTE(Mueller @ May 25 2005, 11:43 AM)

Andy,

I think a brace similar to the green one here should work to hold the TB's in place along with the hose/clamp parts.

Mike,

Looks good! You need the rigid mount to facillitate the throttle linkage anyway.

That Solidworks?

Andy
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Mueller
post May 26 2005, 12:02 AM
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QUOTE(Randal @ May 25 2005, 01:58 PM)
Mike - Can you make adapter 2 out of the same metal as the TBs and if so couldn't could you just bronze or weld the two together?

I've thought about welding them on the very most bottem section, but I only have a MIG which is not set up for aluminum and I don;t think I trust myself using my oxy-acet. setup (IMG:style_emoticons/default/welder.gif)

TIG would be best but they'll still have to be positioned darn near perfect.....

brazing might work, but I still would worry about the heat since the walls are pretty thin on the TB's

Andy,

Pro/E...drawing not as pretty as it could be, but I'm trying not to spend too much time on this project....
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McMark
post May 26 2005, 01:01 AM
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Mike, I'm probably going to be buying a TIG setup very soon.
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Mueller
post May 26 2005, 10:13 AM
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QUOTE(McMark @ May 26 2005, 12:01 AM)
Mike, I'm probably going to be buying a TIG setup very soon.

Really??? (IMG:style_emoticons/default/smile.gif)

cool....you are getting one that is AC/DC correct??
The cheaper DC only units are not recommended for aluminum.

I've been thinking of buying one, but I cannot justify the cost....I'd be willing to throw some money your way to help "invest" in the welder (IMG:style_emoticons/default/welder.gif)
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Site
post Aug 9 2005, 12:55 PM
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I'm eagerly following this. Is there anything new to report on using the throttle bodies?
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Site
post Oct 31 2005, 03:59 PM
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Is anyone doing custom work with individual throttle bodies?
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Mueller
post Oct 31 2005, 06:27 PM
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QUOTE(Site @ Oct 31 2005, 02:59 PM)
Is anyone doing custom work with individual throttle bodies?

If you do a google search, you might find the few sites showing adapting motorcycle t/b's to a 911 (not sure if completed or not), a few Hondas and at least one Neon

no progress to report on mine....
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Terrance
post Oct 31 2005, 06:59 PM
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Hehe, first time I saw this thread.

Mike - Love the vintage, circa 1988 radio headphones

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Aaron Cox
post Oct 31 2005, 07:05 PM
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mike - you give up on this?
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Mueller
post Oct 31 2005, 10:50 PM
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QUOTE(Aaron Cox @ Oct 31 2005, 06:05 PM)
mike - you give up on this?

nope, still going to do it, just other projects ahead of this one....1st priority is getting my car running better, then the brakes , then ???? and then the throttle bodies (IMG:style_emoticons/default/smash.gif)
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Mueller
post Mar 24 2006, 03:25 PM
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been a while since I've touched these parts...so this weekend* I'll be machining the manifolds by removing the material in red and cutting 2 pockets for the T/Bs to slip/rest into

once placed inside, I shall weld the T/Bs to the manifold, only negative things I can think of is that due to the manifold design, long studs will have to be used and installation of the T/B-manifold assembly to a motor already in the car might be a PITA

*(unless someone can give me a good proven reason not to (IMG:http://www.914world.com/bbs2/html/emoticons/smile.gif) )



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Aaron Cox
post Mar 24 2006, 03:50 PM
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why weld them on? bolt on or clamp on would be THE hot tip....
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speedster356
post Mar 24 2006, 04:45 PM
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I have heard that the original motorcycle mounting is the same bolt spacing as an IDF? I mate has used a set of Suzuki Hyabusa bodies on his Alfa 2.0ltr powered sports car with great success.
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Mueller
post Mar 24 2006, 04:52 PM
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QUOTE(Aaron Cox @ Mar 24 2006, 02:50 PM)
why weld them on? bolt on or clamp on would be THE hot tip....

no real reason for bolt-on or clamp on....usually attachment methods like that are for "universal" or more than one type of application (the manifold accepts a weber, a dell(?) or off the shelf throttle bodies such as Jenvey or TWM's)

doing it this way will just means that this assembly will only work with a Type IV motor (1.7/1.8 or 2.0 heads)

The TB's shouldn't need to be removed from the manifold, wrong size TB?? Well, sell these and buy new ones...manifolds are $50 to $80 per pair, not that big of a deal....

Even "if" the TB's need rebuilding down the line, they can still be taken apart..........
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