Isn't it a grass track/speedway motor similar to a Weslake?

PJ

 

So far as I understand,yes. Seems closer to a jawa or GM.

 

Does it have adequate cooling fins to not be run on alky?

 

Hoofhearted has a Weslake Norton, so he can probably give some input, but in my opinion, go for it.

Ken

 

I was hoping to get around the cooling issue by lowering the compression w/ flat top or dished piston and a spacer tween the barrel and case. I could always play at building an ADI set-up.

 

I think you'll need some fins

or an amazing intake setup

or wrap some tiny stainless or copper tubing around it with coolant pumped thru it

Any or all of these would be easy enough to do

 

Copper tubing ... how very steampunk. might be fun, it'd look like a rolling still.

 

Oh no! It's another guy who says "steam punk"!

 

Just to clarify. I have not and will not.. EVER...build "S-punk" anything. Too much weight. I might wrap the barrel in a water jacket or air deflectors like a multi row radial.

 

Still? Can it make whisky as it goes about the day? If so, ill gladly take a copy of the blueprints.

 

He must be kin to Unc who hasn't shown back up spouting spunk lingo since I called him and made him cry for two days.

Check out Billy Lanes 80" HD flatty that he water cooled... I am sure it can be found on the net.

 

is this the engine we are talking about?

I don't think this will do anybody any good in a street bike, esp without fins. You need to water cool that cylinder and head. This is a lot of work. Couldn't you just find a street engine to work with already? I hear SR500s are nice.

 

G.... did you ever see BL's flatty with the copper tubing?

I'd have used smaller and more stainless and made it less industrial looking...



but it came out well

I'd dig it up and post it in this thread but this handheld makes me lazy.

The big flatties.... with all their massive cooling fins

Eat a cylinder bore in less than ten thousand miles

This Godden would be a cakewalk to keep cool

 

Geeto, thats the one. Just thought I'd try something different. I've Already got a cb200, cl360, and a cb550 I'm rebuilding. was looking for more input on the motor but it does seem a poor choice.

 

Hack, I have seen Billy lane's flatty with the tubing (in person no less --> he calls it the chronic). I have also seen cb750s that have used this trick as well as bikes that turned their fin area into water jackets by welding sheet. In all those cases, the stock fins were retained (with modification) and still functioned as heat sinks

The problem with the GR500 I see is that it is just a solid cylinder with no external cooling fins and relies on its fuel source (alcohol) to run cool (even then I am not so sure how cool it is since these races are not that long to begin with). that engine would need a cooling system of some kind to run in a street bike (and major detuning) and that kinda kills the purity of it. I could see a drop in compression to like 11:1 and still using alcohol on the street, but then the fuel requirements and availability of fuel make it something hard to do. I am not saying don't do it, I am just saying there are going to be a lot of compromises and it is a lot of hard work.

 

oh, and did I leave out expensive? I betcha you could get godden to mill you a new cylinder and head with a water jacket already in there but I can't see that happening for under a couple of grand.

 

Well, I've got the general feel for the bad idea. guess I'll just stick to the hondas. my buddy will probably just sell it off any way. thanks for the advice. adios.

 

If there was one engine I would consider for an E85 street bike it would be that, you just have a lot of problems to solve and you need to be handy.

 

G..... drop the compression to 9:1

Nice adiabatic and inertial intake

Snake some hypodermic tubing all over the topend.... plumb in a belt driven pump, heater core/radiator/cooler..... maybe even an expansion tank plus a tstat

problem solved other than cam lobes

 

I don't know what is there for oiling the underside of the piston crown but

That too would be quite easy to squirt oil and have a cessna sized cooler help oil cool it as well

Have your friend send that to me. Engine complete with crank sprocket... I dont need anymore of it.