Turbo on a rat bike: Could a TD04 spool a 440CC twin?

[oldhat]

Yeah, I'm stripping the bike and taking all of the crap I don't need off, paint, new tires, exhaust, brakes, maintenance, etc. first and then riding around and getting used to the bike.

I'm not just turboing it right off the bat.

This is like an ongoing thing. I won't even think about starting this until 2009 and I get a feel for the bike. Who knows, it might be enough as is but somehow I doubt it. We'll see.

[mxpunk]

theres turbo kits out there for newer efi bikes, it'd make things alittle easier IMO..

unless you have the time/skills to fabricate stuff. the fact that the bike is air cooled is gonna be a big obstacle to overcome..the rear cylinder will always run hotter.

air cooled engines arent bad, but for forced induction water cooling is a big improvement.

[oldhat]

Originally Posted by mxpunk

theres turbo kits out there for newer efi bikes, it'd make things alittle easier IMO..

unless you have the time/skills to fabricate stuff. the fact that the bike is air cooled is gonna be a big obstacle to overcome..the rear cylinder will always run hotter.

Horizontal cylinders. There's a method to my madness.

More and more I think a supercharger might be a better option. Or just a better carb, AWI for advanced timing and then sawing the mufflers off. Call it a day. I'll probably be happier for it in the end.

I want to get rid of the battery and run a magneto instead. I already bought a kickstarter off an old KZ400. For all that weight reduction, y0.

It never ends...

That said, this thing is going to be pretty sick when I'm done molesting it.

TON-UP

[mxpunk]

^^ oops, i didnt look hard enough

why not just build a nasty N/A motor..high comp pistons, balanced crank, head porting , cams, oversized valves, etc


im sure it'd still be fast enough to whoop up most cars on the road

[susiemk]

OOO

We have personally run 11.8 second 1/4 miles on a 68 cubic inch 12A DRAW THRU T3 Turbo Rotary powered Starlet.

Take a free GN turbo, fab a intake to connect to a free Holley carb, & connected to a free 12A ported rotary motor = the cheapest 11 second car I know of.

This set-up will work with ANY carbed motor.

[oldhat]

I've never balanced and blueprinted pistons and rods before but I was thinking about that, too. I'm taking it apart anyway so might as well do that while I PnP everything. That would make WAAAAAY more sense than adding an expensive, break-y turbo to the mix anyway.

These old Kawasakis are like Subarus in their Lego-ness. Everything pretty much fits everything else.

[oldhat]

Originally Posted by susiemk

Take a free GN turbo, fab a intake to connect to a free Holley carb, & connected to a free 12A ported rotary motor = the cheapest 11 second car I know of.

Sorry, can you explain that to a n00b? I understood "Holley carb" but that's it. Are you running a Mazda rotary in a Starlet? Is a GN a type of turbo?

EDIT: SusieMK, do you have pics or a link to your setup on the Starlet? sounds really cool.

Starlets are sick cars, I wish there were more of them on the streets here in the US. They're so rare here.

There's an old timer at a cafe I hang out at who likes to talk shop with me about bikes and cars. He's like straight out of American Graffiti. He used to have one of those sleeper Turbo Buick Regals. I'll ask him what he knows about draw through turbos. He got a huge grin on his face when I told him about this project. He motioned towards everyone else playing chess and talking about politics and said "I'm happy I have someone who likes polluting the environment more than yapping about Barack Obama."

[Slava]

Got mad at my subaru...so i boosted my gas scooter :)

i actualy used subaru up pipe and fabed exhaust shield (did that in 1 minute just so i wont burn anything) out sheet metal. for inatke i used radiator hoses..
or i was bored and wanted to be spontaneous so i slaped a bad turbo on (fins,play)

but if you really want to do this it will take some work.
have you thought on how you will mount it? how you will run cooling to it? how you will run outlet on the turbo etc,

[oldhat]

Wow! I totally forgot you did that Slava, that thing is totally badass. Gives me tons of ideas.

As far as mounting it, I was thinking of three ways to do it: I could mount it in front of the cylinders and underneath the headstem which would be easiest as far as getting the exhaust into the hotside, then having a short downpipe exhaust. There are two brackets on the main framerails I could use to hold it in place. But it would be difficuly trying to get the compressed air hose back into the intake.

Or I could mount it hanging along the side which seems to be the standard way to do it but these arrangements are pretty ugly to me so I'm not too crazy about that. I also don't want to burn my leg on the hotside. I want it either in front of me or underneath me.

It's probably really not feasible but in one of my twisted little mind's fantasy bullshit sessions, I thought about flipping the cylinders/heads around (like flipping the manifold on our cars) so I could get a nifty ram air intake for the carbs. But I don't know if the cylinders are symetrical, although I think there's a good change they are. I don't know if the carb would fit facing forward. Doubt it.

As far as cooling, I really have no idea. Oil? Water? Oil + water? More to read about.

[HondaH8er]

Well, it's an air-cooled bike, so you don't have many options with that unless you make an entire stand-alone system just for the turbo. And honestly, you would have been better off just getting a bigger displacement bike instead of trying to boost a smaller one, but it would be kind of cool to do. I don't know that I'd like the on/off power boost you're going to probably get, though, especially on a bike. I have an 84 Honda Magna V65, 1100cc V4 with a 10k redline, and that thing pulls so hard and fast, I don't even WANT to do anything to add power! But the best part is the powerband is pretty broad, lots of torque everywhere, so I can just twist and blast off. Oh, and I got it for $2500, and it will pretty much whoop on most anything out there; with a pro rider, 1/4 mile in the high tens and 0-60 in about 3 seconds. It's actually kind of scary, but still puts a huge grin on my face!