new 600 class modified "what do you think"

r_wood24 · Senior Member

new 600 class modified "what do you think"

H 2 H · Guru

They run something like this downunder and there F500 chassis with sheet metal making them look like cars

Saw one flip couple weeks ago and the skin came off

29Sleepy · Senior Member

Another interesting class (and perhaps the solution to future use of the 250/270 frames and a low cost engine). Same base engine they use in the mini-cup cars, converted to methanol.

www.yg390.com

Deming Speedway · Senior Member

that is interesting

Date: Feb 15 7:46 PM, 2008

My opinion is they are really ugly!

Date: Feb 16 3:20 PM, 2008

The top ones I was talking about being ugly. Also, I'm thinkin' 5 classes are plenty. I thoroughly enjoy the racing we have going on at Deming! Besides, the 600 class is relatively new, why would we need another new 600 class?

Deming Speedway · Senior Member

Sleepy do you have more info on that engine

29Sleepy · Senior Member

I'll do some research. Not going to compete with the 250, but would be great if this could be developed as a true sportsman micro to replace the 250's down the road. Most expect part to be available from Honda for the CR's for another 6-7 years, but not everyone is willing or able to move up to a 600 or 1200 operation when that time comes.

Here's some base specs on the GX390

Weight: 75lbs w/ electric start
Compression: 8:1
Horsepower: 13 (stock governed at 3600)
BoreXStroke: 88x64

I've seen mini-cups advertised w/ 18-26 hp, on gas using the stock carburetor, so I'm interested to see what kind of power they make on fuel.

4PzRacin11z · Veteran Member

Could this be an option for the Jr Sprint class?

Would be an easier transition for the Quarter midget folks that are use to the Honda GX120 and 200 motors, also 4 strokes are less expensive to operate over the season. I also think this would help grow the class.

Thanks Scott

29Sleepy · Senior Member

I think this motor is probably a little big for the KT100 frames. The Briggs World Formula 200 motors looked real good in the JR's down at Delta a couple years ago.

4 strokes aren't always cheaper to operate over the course of a season. The 250's are actually very affordable to own and maintain, especially considering there are nights that they match lap times with the larger cars. Unfortunatly, I don't think there is a 4-stroke single that will match the speed-per-dollar we get out of them.

4PzRacin11z · Veteran Member

Sleepy,
My comment may have been a little a out of text since we will be running the JR class this year for the first time. We have ran 2 years (3 Seasons) in QM on the same GX120 motor with no money outside of the oil changes ,valve springs and lapping the valves once and never finished outside the top 3. I just had our 2 KT100's checked out at a cost of twice what the GX120 cost outright new.

Is it racing season yet?

Thanks Scott

29Sleepy · Senior Member

Indeed, the GX120 is a workhorse, and it single handedly saved the QMA. We were running 1/4's when they introduced it and saw car counts explode.

I'm sure you'll have a blast at Deming.