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Old 02-02-2011, 07:25 PM   #1
Tommy_J OP
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950 Supermoto Turbo Build Thread

Hey All. I decided to go nuts and turbo my 950 Supermoto. Some folks, even as far away as France, have asked for info on the build so here we go. This is the virgin prior to defiling.
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Old 02-02-2011, 08:09 PM   #2
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Step one : Decide on objectives

I have in mind a low boost installation. Say under 6 psi. A couple of things are really important to me. One is that boost start early and enhance the already excellent midrange. Peak power does not need to be huge but if the turbo machinery can be sized for 150 hp with good midrange so much the better.

The bike should be quiet. This is important to me as I like to travel with the front tire ½ inch off the ground whenever possible and being quiet make it possible more. Turbos make nice mufflers but additional muffling will be needed for the level of stealth I’m after.

To make things interesting I’m shooting for a net weight reduction and significantly improved off road ability
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Old 02-02-2011, 08:37 PM   #3
andyhol
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standard 950 supermoto not enough?
increase off-road ability and add a turbo?

too awesome and really fucking crazy, good luck
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Old 02-02-2011, 09:33 PM   #4
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Step Two : Select Turbo

Looks like a clone of a Borg Warner K03 will do fine. This trim should be good for 180 HP at a pressure ratio of 1.63, or 9.26 psi boost. Not that I’ll ever run it that hard. Peak boost is achieved at 4200 RPM.

There’s a lot of talk about how great ball bearing turbos are but I have no desire to spend $700. Final decision was for a Chinese journal bearing turbocharger. K03 turbos are used on untold thousands of VW Golfs and Beetles and there are a lot of these Chinese clones running around as replacements. I goggled around to see if anyone had bad experiences with them and came up empty. Sure, the quality is more spotty than the real thing but this sucker only cost $190. If it goes bad I’ll replace it for less than a change of tires.

Here's the efficiency map
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Tommy_J screwed with this post 02-03-2011 at 05:18 PM
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Old 02-02-2011, 11:16 PM   #5
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Old 02-02-2011, 11:23 PM   #6
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Holy crap.
Subscribed!
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Old 08-28-2011, 04:19 PM   #7
pennswoodsed
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wwwww ow !

Quote:
Originally Posted by Tommy_J View Post
Step Two : Select Turbo

Looks like a clone of a Borg Warner K03 will do fine. This trim should be good for 180 HP at a pressure ratio of 1.63, or 9.26 psi boost. Not that I’ll ever run it that hard. Peak boost is achieved at 4200 RPM.

Here's the efficiency map
My kind of crazy, is map from actual turbo or the kkk original ?
Thanks,Ed

pennswoodsed screwed with this post 08-28-2011 at 04:20 PM Reason: space
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Old 03-10-2011, 11:33 AM   #8
Friday1
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Thread about pressurizing carbs

http://www.turbo-bike.net/Pressurize%20carbs.htm
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Old 03-01-2013, 03:10 PM   #9
GI_JO_NATHAN
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Almost forgot about this.
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Quote:
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Someone quote me so he can see my response
Quote:
Originally Posted by POLLOCK28 (XDTALK.com)
From what I understand from frequenting various forums you are handling this critisim completely wrong. You are supposed to get bent out of shape and start turning towards personal attacks. Get with the program!
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Old 03-01-2013, 04:28 PM   #10
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I really should do some follow ups. Sorry for letting the thread go quiet for so long.

The bike is running great. It hasn't blown up or given me any grief. I've done a bunch more minor refinements to it which I'll try to write up.
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Old 03-01-2013, 04:53 PM   #11
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Quote:
Originally Posted by Tommy_J View Post
I really should do some follow ups. Sorry for letting the thread go quiet for so long.

The bike is running great. It hasn't blown up or given me any grief. I've done a bunch more minor refinements to it which I'll try to write up.
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Old 03-03-2013, 01:58 PM   #12
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Quote:
Originally Posted by Tommy_J View Post
I really should do some follow ups. Sorry for letting the thread go quiet for so long.

The bike is running great. It hasn't blown up or given me any grief. I've done a bunch more minor refinements to it which I'll try to write up.
Nice!
Really happy to hear that.
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Jonathan
Quote:
Originally Posted by Bueller View Post
Someone quote me so he can see my response
Quote:
Originally Posted by POLLOCK28 (XDTALK.com)
From what I understand from frequenting various forums you are handling this critisim completely wrong. You are supposed to get bent out of shape and start turning towards personal attacks. Get with the program!
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Old 03-05-2013, 01:01 PM   #13
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Quote:
Originally Posted by Tommy_J View Post
I really should do some follow ups. Sorry for letting the thread go quiet for so long.

The bike is running great. It hasn't blown up or given me any grief. I've done a bunch more minor refinements to it which I'll try to write up.

I would love to see how you have refined your concept!

Tell us more tell us more!!!
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Old 02-08-2014, 08:22 PM   #14
spartanman
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Why water injection instead of an intercooler?
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Old 02-09-2014, 09:13 AM   #15
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Originally Posted by spartanman View Post
Why water injection instead of an intercooler?
There are multiple reasons. I can clarify if you like but they are :

The intercooler would have been hard to package with the turbo at the very back of the bike and the intercooler needing to be at the front.

The water injection system I'm using is lighter.

The water is sprayed through the compressor. This produces great atomization. Evaporation cooling DURING the compression process better approximates an ideal (isentropic) compression process. This makes the turobocharger's "efficiency island" bigger. Also, I wanted to get evidence to slay the internet myth that water erodes the compressor. It hasn't

If I need to make minor adjustments to the fuel-air ratio I can just mix the water/methanol to a different ratio. I'm already doing this for a supercharged S2000 car, so I have jugs that are 50/50 for the summer, 60% meth for winter (adds more fuel to go along with the cooler denser air) and can "special mix" if I want to be frugal or raise the boost.

.
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