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UMSRARacer
12-23-2004, 12:16 PM
I race a particular type of Open Wheel car called a Micro Sprint. We are allowed 600cc engines in 4 different classes. I am enclosing a pic of our type of cars. We also race winged versions of this type of racer. I am looking for any information available on the 45.V2 engine (shown below). Engine Specs (Bore-Stroke, etc.), HP figures, availablity of High Performance parts for this engine. Any info would be helpful. Thanks.
http://members.cox.net/umsra/images/45V2.jpg
http://members.cox.net/umsra/images/chris2004-5.jpg
http://members.cox.net/umsra/images/chrisaery01a.jpg

Devildog
12-23-2004, 01:25 PM
That is the engine for the Aprilia dirt bike. About as hard to get ahold of as a Jenna Jamesons dirty panties..

However if you did manage to get ahold of one it would probably suit the smaller size little bull rings quite well. It is supposed to be a 450 that MAY be able to be punched out to 550. I think you would loose out on top end to what some of the guys are buildin in the 600s, but with the amount of grip you have you would be able to take advantage of the lower end and get a good drive.

Like I said, good for th 1/5 and maybe 1/4 milers, but anything bigger I think you'd get outgunned.
For more/better specifics, ask clarkie. He's the one in the loop.


BTW, nice micro. I raced a 360 here in Fl for a little bit.

UMSRARacer
12-23-2004, 01:58 PM
Thanks Devildog. I am always fighting windmills, LOL. I think the torque would be better on the V2 than an R6 Yamaha, etc. Would be giving up top end but it is not strictly a HP game. Always got to get the power to the track as you well know. Nice sprinter BTW. Micro's are raced down your way, you should investigate getting into them if you still have the racing bug. Much less expensive than Sprint racing. Unless you are seeking elusive engines such as the Aprilia, LOL. I did contact Clarkie so hopefully he can help. Thanks again.
Wade Finley

Devildog
12-23-2004, 10:09 PM
I've seen the micro's or 3/4 midgets as they call them down here run. they're real quick, and a lot faster than people gie them credit for. they're real race cars.

I only got the sprinter to race after I hurt myself racing a bike too badly to ride for a while. I got my knees fixed (mostly) now, and I'm getting back on a bike. The sprint car was a lot of fun, and WAYYYY cheaper than racing a 250 GP bike, but it just did'nt scratch the itch like I need it scratched.

Devildog
12-23-2004, 10:23 PM
IF you're looking for something more torquey, and just differrent than the same old 600 set up, have you thought about maybe something like a triumph 650? Or maybe build a hoss of a Rotax 550 single. Like in a flat track bike.

I don't know what your weight rules are, but the rotax would weigh about 1/3 of what an R6 engine would weigh.

Or, if you really have some cash to spend. How about a 600cc, 4 stroke twin. purpose built proper racing engine, pushing about 90 or so HP?

http://www.maxsym.com/gp500-600/

Devildog
12-23-2004, 10:24 PM
Pic

UMSRARacer
12-28-2004, 09:30 AM
Devildog:
I contacted Maxsym yesterday (12/27/04) and they responded quickly. Surprising really. At this time they do not have USA dealers and won't until at least March. From everything I was able to glean from their site the engine has definite possibilities. Giving up HP but gain in weight savings. Weight that may be placed where needed to help with traction and handling.
I do wish Aprilia would become a player in the USA with the 45V2 engine. I would think the "V" engine would be a excellent choice to compete with inline Japanese engines. But until that time I will content myself with whatever is available. I just bought an old Honda VF500 Interceptor engine to run this season. It is also a V4 and can be bumped up to nearly 600cc and has most High Performance parts available. Will keep you updated as to how everything works out with the Micro.