Got a few questions aimed towards Brandon & Ohton or any sand drag gurus. How much would you say it costs to build a motor like K&T's "Krankenstein"? I'm sure it's really expensive, so what would it take for me to get into mid-high 4's? Both mod wise and $ wise? I'd be happy to dip below 5 seconds. I'll be piecing a Banshee together over winter, so time is not a concern, but would like to keep a moderate budget on this project. Thanks.

 

A true race ported 350 with alcohol, override tranny, and drag pipes will get you below 5 secs. If everything is set up right you will see 4.7-4.8's. If you really lighten up the bike,(remove front brakes, light weight swing arm and axle, ultra buff front tires etc.) Youy could see as low as high 4.5's. To build a 350, just engine work is going to run around 12-1500 to get it done right. Add a long rod crank and make it a 370 and you should be looking at about 1800. Its going to take a stroker motor to get below 4.5. This is when you start getting into the big money! A crankenstein will cost around 8000 to build! They are not a cheap engine. I think the superior sleeve monoblocks are a much better alternative. For 2000 you can have a the entire top end kit. Bolt on a 460 and probably 90hp. I think the cylinders work better with an increase in stroke as well. If you want a really big engine I would go with this set up. If mid and upper 4's are fine just build a 350 or 370. Have you looked at my site? I'll have it updated early next week.

 

Brandon,
I saw your site and dig it. I would want to see more pics and more technical info on the various bikes. Very cool site! My old motor was built by Rudy and loved it before it spun a rod bearing. My buddy will be fabricating some CroMo Banshee frames soon, so the bike will be very light. Where can I find that monoblock top end? And what displacement does it come with? I'll have to contact Rudy, C&O, and Ohton and see what they can do with that.

 

Take a look at www.superiorsleeve.com They are the marketers of the monoblock. I will give you a little bit of advice that i have learned in the process of drag racing for several years. Get more motor than what you think you need and overdo everything! In the long run you will be much happier. If you think you want a 350, build a 370. If you think a smaller stroker will be alright, build a monoblock! Thats the way i approach it now. I have about 4 sets of everything becuase I didnt go all out the first time. I just recently sold all my stuff and down to just a few things. I had carbs everywhere, ignitions hanging on the wall. Pipes stacked up! Study hard and do it right the first time. Check the sie out next week, I will have a ton more stuff on it.

 

VERY sage advice having been thru many hours and dollars myself.

 

hey guys,
i know that brandon said that the monoblock was basically a pro-x, but i heard/read somewhere that there was actually going to be a set of cylinders called pro-x. or am i just mistaking that for the l.a. sleeve co's monoblock. thanks

 

To my knowledge, the Pro-x is the La sleeve monoblock. They are not as big as the supperior sleeve(bore). The LA sleeve blocks are pretty cool looking, but from what I have seen the supperiors are supperior.

 

Ct racing is developing a pro-x cyclinder kit for the banshee. Everytime I call or email though I get a different answer as to when it will be avaiable.

 

Might I reccomend some supplemental reading as you approach building that mountain motor.

Try SAE Article: SAE 1999-01-3342

It's a paper on the affect of bore to stroke ratios. It's not too lengthy while not too swallow in scope. In my opinion an excellent paper that provides pertinent information.

 

Exactly what I was alluding too. Square engines are the best according to this paper. The VE, CE, and scav are all about the "best" across the board with a square motor.

The paper goes into it a tad deeper and they show what happens at 4 different bore to stroke ratios. While some applications work well with undersquare and oversquare, the square motor did the best over the widest range.

Hey, don't have to tell me twice, look what I've got a 72mm by 72mm....

I'll try to email you soon with some more specific data...