Engine ccs...

[ProtoDie]

Well, the thread is engine cc, not tire size,,,,as far as limits

I just think that it is not that simple to use the tires as a means of limiting the horsepower to the ground.
With all the different tread patterns out there, you would have to specify one tire that everyone has to use.

After that you would have to get your tire from the track like other styles of racing,,,,so no one is cutting extra groove or modifying

I doubt the build parameters will go as far as specifying length of A arms, travel, king pin inclination , trailing arms vs a arms vs 3 link vs 5 link, gearing & ratios.
All of which tire size is a factor in performance and design

Also, what about pre existing cars that are designed and already built to run a taller tire than 22. *Like Kfabs Briggs ( I think, not sure ,what size but looks tall)

What is the largest size the original stadium lites ran ??

If there is going to be a limit on tire size, maybe that should be in a different thread, but do it for the purpose of keeping the tires the same, not for limiting horse power.

To me it looks like the motor size is close to being figured out.

[Bugpac]

I like kludges suggestion the best, naturally aspirated would include efi just no turbos, nitrous etc....

[Bugpac]

Seems how this thread is getting off track more than its making them, I have a suggestion, limit any motor to manyfacturers specs of under 120hp......Most 120 hp motors once someone dumps there life savings into them will easily be capable of 150-160....That is to much.....If you start letting 1000 cc twins etc making stock 140 they easily can be pumped to probbaly push 180....You have to draw the line somewere, or not have any at all.....

As for tire size, height isnt going to make a bit of difference in hp to the ground.....width is going to ultimatley be the deciding factor...Start a new thread and preach tire size, were trying to get somewere in this one.....

[ProtoDie]

Whoops *my bad ,,,I mis understood

Should their be a class for the 4 cylinder 750 & 1000,,,,,
I am seeing them at
(GSXR)
750 HP 110-120

and 1000 HP 138ish

GSXR 600 96-103HP

Here is one link to where I got the specs. *I know hp specs range quite abit

http://www.factorypro.com/dyno/true1.html


I do not know what 2 stroke sled engines put out.

Maybe someone can post some specs

[Bugpac]

my point exactly, 138 ish is pushing it, i believe for the purpose....the 750 could be easily pumped up to exeed the limits intended, were some of the older 1000 may only be rated for 110-120....

IMO we need to set a standard manufacturer hp limit, then go from there, as there are far to many choices on engines etc.....You know someone will take the 1k and it will be seing close to 200 ponies....

[ultraman]

The only thing i don't agree with in kludge's suggestion, is the 500cc 2 stroke limit in the open class.It should be 600 tripple.There are alot of these engines available.I can't think of any mf that makes a 500cc tripple.

[hero_saku39]

120 hp eliminates too many engines by just 10 or 15 hp, including all of the new super sport 600s. *Keept it at 140. *OEM parts only allowing aftermarket exhaust and air filters. *If we don't want to do that then ignore the few guys making big hp with the twins until later. *I think if this is done right most people will not be looking to spend money on more hp. *I think most will be satisfied with the I4 bike engines because of price. *Like someone pointed out earlier, if a couple of guys start stompin ass then let them run together but score them in a different class. *I am all about keeping the gsxr 1300 and 1000 class bikes out. *They make too much hp to use and they would make this class get more expensive (by 2k at the least). *If all of the available engines are in the 100 to 140 hp range that opens it up to a huge number of engines and the racing will be close. *I think if you have 100 hp then you will be competitive and too much hp will not be a help but eliminating too many engines may make it harder for people to get in to it.

[slowbriggs]

At 100 hp you are limited to 500 cc sled engines. *(some are rated at over 100hp) *I can tell you from personal experience that a 500 sled motor in a briggs car has a lot of competition from built 350 odys and well built pilot motors in a drag race. *Once the turns and bumps are put into the equation the hondas are a thing of the past.

[hero_saku39]

At 100 hp you are limited to 500 cc sled engines. *(some are rated at over 100hp) *I can tell you from personal experience that a 500 sled motor in a briggs car has a lot of competition from built 350 odys and well built pilot motors in a drag race. *Once the turns and bumps are put into the equation the hondas are a thing of the past.

I am not sure if this is in response to my post but I am not suggesting that we limit to 100 hp, I am saying that if you have at least 100 hp you will be competitive and that bumping the limit up to 135+/- you open a ton of engines up for inclusion.

[slowbriggs]

I agree with you on that.