upgrade for an old factory turbo bike - Wrist Twisters
 
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post #1 of 15 Old 12-09-2006, 03:11 PM Thread Starter
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upgrade for an old factory turbo bike

the zx750turbo ('84-'85), aka gpz, originally had a small Hitachi turbocharger.
Here's a pic of my winter project, adapting a new Garrett gt25r with a
custom titanium header

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post #2 of 15 Old 12-09-2006, 04:09 PM
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Sexy...and scary. I bet that thing is stupid-fast. I should turbo my KZ440

2002 919 40,000 miles
"racing is life...everything else is just waiting"
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post #3 of 15 Old 12-09-2006, 05:36 PM
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just curious how much clearence is there between that turbo and the tire?? looks like a point it and hold on kinda ride :001_smile:

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post #4 of 15 Old 12-09-2006, 05:48 PM
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Super stupid fast

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post #5 of 15 Old 12-09-2006, 07:48 PM
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Holy crap.


So awesome...

'02 RC-51
'10 Unicycle

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post #6 of 15 Old 12-28-2006, 08:41 PM Thread Starter
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so i have a few of these stupid things.
this one gets custom gauge upgrade


it will have a zx636 speedo/tach and autometer boost/afr gauges so we made
this housing out of a solid block of aluminum, will have it anodised to match the forks, and the whole thing will hide behind a Ducati Monster headlight & speedscreen.
it took a day to make the housing, but i'm not sure i'm digging it. too clunky, perhaps?

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post #7 of 15 Old 12-28-2006, 11:22 PM
 
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turbo on a bike? this is very new too me

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post #8 of 15 Old 12-29-2006, 05:15 AM
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Quote:
Originally Posted by gpzTurbo View Post
so i have a few of these stupid things.
this one gets custom gauge upgrade


it will have a zx636 speedo/tach and autometer boost/afr gauges so we made
this housing out of a solid block of aluminum, will have it anodised to match the forks, and the whole thing will hide behind a Ducati Monster headlight & speedscreen.
it took a day to make the housing, but i'm not sure i'm digging it. too clunky, perhaps?
I like the gauge block, may I suggest just milling it down to about half the thickness and adding a few lightening holes, then anodize. It will be more than strong enough and would look trick.

Question: Are you using any variable vane turbos? Have you added any juice with you set-ups?

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post #9 of 15 Old 12-29-2006, 06:24 AM Thread Starter
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the back is hollowed out and a cover plate was made also so that all the wiring could be concealed. i think to make it lighter/thinner/less bulky would require a do-over. If it was only a frame as opposed to a box your vent holes would be an awesome idea. I appreciate it though, feel free to shoot any other ideas as I'm creatively challenged

Danman - all 4 japanese mfgrs each made a factory turbo bike (Honda made two) in the early-mid 80's
Honda started with the cx500 turbo in '82
then in '83 honda's was the cx650 turbo while Suz and Yam each had one.
all these models lasted only one year then in 84 Kaw made the 750 Turbo based loosely on the gpz. Their model lasted only two years but had tons
of advantages over the others. Among which was pre-engineering a "race mode" into the computer (yes, it's fuel injected) which eliminates the safety
overboost ignition interrupt so on can crank up the boost if he wishes. That's just the beginning. But they're still heavy and have antique suspension which
is what i've been working on with this one, adapting 04 636 front/rear. Thanks to evilbay it's been affordable.

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post #10 of 15 Old 12-29-2006, 06:40 AM Thread Starter
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for more info you can check out
www.turbomotorcycles.org
or my personal favorite
www.750turbo.com

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post #11 of 15 Old 12-29-2006, 08:21 AM
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Here's a video of a turbo-charged Hayabusa. It's not a Kawi but fun to watch anyway. It seems like this guy is having trouble keeping the front down. Does the Kawi have the same problem?

http://www.youtube.com/watch?v=UnzWudZsCVM

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post #12 of 15 Old 12-29-2006, 01:20 PM Thread Starter
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that could go into a whole other discussion about "usable" power
what's the use in building a 300 hp bike if you'll never be able to apply it to the road? but if he likes it that's all that matters i guess. i'm sure there's a million people who wouldn't like my old junk.
mine have two stages of boost so on pump gas they're completely streetable and docile around town and tons of fun in the country. If you want to go for
some high speed blasts, run it on race fuel or aviation fuel (available at my local airstrip) and the 2nd stage of boost is button-activated. oh yeah, it cost me about 1/3 the build price of that eye-abuser.

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post #13 of 15 Old 01-03-2007, 08:15 AM
 
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That Hayabusa video is cool at first; the runway runs are pretty impressive. The second half totally pisses me off. That kinda crap is exactly why some people hate guys that ride sporty motorcycles. 120 mph on a congested highway with your front end in the air shows complete disregard for anyone else on that road. At that speed, if he rear ended someone it would probably be enough to kill them both, not just the idiot on the bike. Natural selection will catch up to him sooner or later.

By the way, 500hp on a street bike? How useless is that. Stretch it, strip it, and hit the dragstrip. Thats the only place it's worth a damn if you ask me. If you can't keep the front end down at a buck fifty, then what's the point?

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post #14 of 15 Old 01-03-2007, 08:23 AM
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Have you not ever heard the phrase "Too much power is just enough"?

I remember that from an article on an Egli Kawasaki of many a moon ago.

I said I never had much use for one.
Never said I didn't know how to use it."
Mathew Quigley
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post #15 of 15 Old 01-03-2007, 01:53 PM
 
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Quote:
Originally Posted by Bigdaa View Post
Have you not ever heard the phrase "Too much power is just enough"?

I remember that from an article on an Egli Kawasaki of many a moon ago.
It's funny that you say that, because my sig used to say " If some is good, and more is better, then too much is just enough." If I still used that sig, I'd have to add "HOWEVER, 500 hp is just godawful stupid on a motorcycle intended for street use."

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