New all-motor AM/X class at MIRock-Prelim Rules

[MIRock Technical Staff]

No oversized ti valves would keep carpenters $6500 head out

2

Yes, it does. It also means that he will just sell it with steel valves at $5500.

This is an all-motor heads-up class. It is highly dependent on horsepower, and the single biggest factor for horsepower is the cylinder head. If anyone has fantasies that some $1500 street-strip ported head is going to cut it in this class, keep on dreaming. A competitive cylinder head is going to be pricey, there is no way around having to spend that money. We are just trying to keep all of the other costs down so that racers will be able to afford that one high-dollar item for their racing package.

PS: We might even consider a limit on valve sizes as well, that will help keep things in check to some extent also.

[MIRock Technical Staff]

How much does the combo weigh? Multiply that by 2.62...

Or what size engine is it, and divide that by 2.62 for the minimum weight.

But remember that the absolute minimum is 460lbs, no matter what the calculator number comes out to be. The 460lbs could be adjusted later if needed.

[MIRock Technical Staff]

so are we moving this discussion to over here?

That is up to you fellas as to whether or not you keep the Smack Shack discussion going or not. That is not a MIRock thread, nor is it specifically about this MIROck class. But since my interest in this is strictly concerning MIRock, I will be limiting all of my discussions to this thread.

Besides, the Smack Shack tends to breed too much non-constructive banter for my personal tastes. I don't have time to deal with a bunch of clowns getting into it about some race that did or didn't happen 2 years ago, who is the most broke, who has the ugliest mama, or any other childish crap like that. This is a serious discussion, and I am only interested in including people with serious things to say.

[money maker]

I like the 2.62 rule keeps it fair for sure

2

[money maker]

But why no auto trans. It sure is nice to not worry about kill time and know its going to shift

2

[Exson Jr.]

I might have to bring viagra back for this.

[STREETDRAG]

Bob will just build a $6500 head that makes same power and will fall into the rules Bob's The Ice C.R.E.A.M Man It will be the newest flavor on his choice chart...

No oversized ti valves would keep carpenters $6500 head out

2

[MIRock Technical Staff]

But why no auto trans. It sure is nice to not worry about kill time and know its going to shift

2

Full auto trans is $2-3000. That is a big expense in a budget class. And you might eliminate whether or not it will shift, but now you have introduced the problem of tearing it up if you have to roll out. You just traded one cheap problem for another expensive one.

And besides, if you are having problems getting a normally aspirated bike to shift, you need a better transmission man or a better set of electronics.

[money maker]

I know theres no winning with u on this but imo its money well spent just like spending money on a good head. Rc charged me 1200 to do mine. So is that a few hundred more than a good pro cut trans?? Thats nothing in the big picture

2

[countryboye]

How much does the combo weigh? Multiply that by 2.62...

so if I got an 1k and my package weighs 580lbsmore I can have up to 1520cc? 580x2.62=1519.4

[money maker]

Id rather put the money in my trans than buy .5 tress that wont make me any faster but i have to if i want to be as long as the next guy

2

[MIRock Technical Staff]

I know theres no winning with u on this but imo its money well spent just like spending money on a good head. Rc charged me 1200 to do mine. So is that a few hundred more than a good pro cut trans?? Thats nothing in the big picture

2

I don't know about "no winning" with me. I am willing to listen to any reasonable argument about any of this. I just don't see how adding $2-3000 to the price of a budget class is a good idea, especially when the equipment bought for that $2-3000 makes the bikes less reliable. If it made them more reliable, I could at least see some angle to argue from.

And speaking from experience, I raced Superbike for 5 years. In that 5 years, with either a full-kill transmission or a 1-2 auto, my bike never missed a single shift. Not once in 5 years. So if anyone is having problems shifting, then they need to take a close look at their equipment, because there is no reason to have to live with an all-motor bike that won't shift.

You got a full auto for $1200? And even if you did get it for that, you could say the same "nothing in the big picture" thing about all of this. What is $1200 for a trans in the big picture? Or an extra $1800 for Ti rods. Or an extra $1200 for Ti valves. Or an extra $2000 for a billet crank. Or an extra $2000 for a billet block? But the problem with all of this is that the sum of those "nothings in the big picture" now add up to $12,000, not $1200 where you started. And if you have a spare motor, you have to buy them all over again for the spare.

Building a set of rules to keep the budget down requires keeping expensive parts out of the class wherever possible. You can't really keep the price of a top-level cylinder head out of the class. But you can keep the cost of a billet transmission out.

[money maker]

I chuck did me a 1-4 auto with billet drum for 1200

2

[money maker]

Auto trans < bst wheels

I say all this because i have had shifting problems and it sucks. Ive got a broken weld up crank laying in my shop to show for it

2

[Exson Jr.]

Auto trans < bst wheels

I say all this because i have had shifting problems and it sucks. Ive got a broken weld up crank laying in my shop to show for it

2

man an auto is the last thing needed for this class. A gud nos cut trans will work fine. As a matter of fact a stock trans will work. My zx10 all motor wud be competitive in dis class if i go back to all motor.