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Thread: How Many Tracks have a 14.5 Cid Class

  1. #31
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    Delaware Ia. runs a Small Block Open class. My son runs a stroker Animal and I run a stroker Honda. I believe they call the class Sportsman Modified 390. They'll have the rules posted on their website.

  2. #32
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    a 390 is a small block?! What's a big block?

  3. #33
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    Ted
    I agree that a 390 is not a small block! It's a pretty big motor to mount on a typical go Kart.
    However, i do not agree that billet heads are easy to make.
    It takes a lot of time and a very expensive CNC machine and especially tooling.
    No shop with a CNC machine capable of making good billet heads is going to make them one at a time.
    I have them made in minimum quantities of 10 at a time and sell at $599.95 each and that's a great price.
    http://www.fastermotors.net/Billetheads.html

  4. #34
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    Just a guess here... I bet 390 is the weight class.

  5. #35
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    Semantics, I guess....easy to machine (with proper equipment), harder to design properly. But I guess with a stock head and a dremel, that's "easier" to modify into an "open." I've seen a nice Model 13 billet head....saved somewhere on my home laptop. Appeared to be hand made.

    I'd make the rules for small block opens simple -- any OHV 212 block as base, open rules. Any flathead 5hp block, open rules. Tilly carbs on alky. Open should be open. Limited should be limited. IMO, of course.

  6. #36
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    Quote Originally Posted by Ted Hamilton View Post
    Semantics, I guess....easy to machine (with proper equipment), harder to design properly. But I guess with a stock head and a dremel, that's "easier" to modify into an "open." I've seen a nice Model 13 billet head....saved somewhere on my home laptop. Appeared to be hand made.

    I'd make the rules for small block opens simple -- any OHV 212 block as base, open rules. Any flathead 5hp block, open rules. Tilly carbs on alky. Open should be open. Limited should be limited. IMO, of course.
    Why do you think that open rules should mandate a Tillottson carb and alky? Why not a Mikuni or Fuel Injection? On gas?

  7. #37
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    390# Is the weight not the cc's.

  8. #38
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    OOPs fatcat i reread your post and i see that i misunderstood. SORRY
    Yes, a true open class should not be restricted to a Tilly carb!!

  9. #39
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    Quote Originally Posted by tecbigdog View Post
    Why do you think that open rules should mandate a Tillottson carb and alky? Why not a Mikuni or Fuel Injection? On gas?
    I should have been more clear....open carb, ditch the OEM. Oh....390#.....Hm. That should be lighter too.

  10. #40
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    Quote Originally Posted by Jimbo View Post
    Why should it matter what brand of engine it is if it's less that 14.5 CID.
    Why not a flat head if someone wanted to use one or a Kohler, Tecumseh, or True Honda

    Thanks Mike.
    I suspect if someone showed up with any of those old Flatheads, they wouldn't be turned away, my guess is availability of parts and pieces on why the class supports the three modern ohv engines....

  11. #41
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    CedarRapids IA
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    Have run at Delaware Ia. in both the Modified 390# class and a combined Open class. Track is very flat and has little to no bite most nights. Both the Animal and Honda are stroked and are very competive with the Opens. No Blockzillas or billet heads are allowed in the Modified 39O# Class the way the rules read. A stock appearing kt 100 can also be run with a limit on the cc's. Open fuel and tires is part of their rules also. All parts for the Animals we run have been bought thru Faster Motors and were a cheap way to build up some of the stock Animals we hadn't run in a long time.

  12. #42
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    Nice nod to the 2's with the inclusion of KT....would make my choice easy. Base engines available for $300'ish and some port work and big walbro with atomizer... Sounds like a fun class to run.

  13. #43
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    Fun class and fun track to run. Not a huge horsepower track but always nice to have power to spare. 4 cycles have their strengths and 2 cycles have theirs on this track. Sometimes we just decide to throw in with the Opens and all have at it.

  14. #44
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    rutherfordton nc.
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    Been running a limited outlaw class in nc&sc for the last three years with pretty much the same rules fun class. All about having fun and having power to race instead of follow the leader.I'm a 2 smoke guy and around here a a/s yam better be really good and right at weight to get it done. We see a lot of reeds and rotarys that have trouble with some of the 4cycles. The 4cycles like those that run the Big O are real trouble for a Yam ,not to mention a good s/a yam isn't Cheap so most will run a reed or rotary just my 2cents Chuck.

  15. #45
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    sorry, not trying to be a smart aleck or anything, just curious, where did 14.5 cubic inches come from for a baseline rule? I think that equals approximately 240cc's....stock clones are 196cc, animals 208cc, and black predators 212cc's....which would leave some room for enhancements by those with either/both the money to pay somebody or proper tools/machinery to do it themselves, which would also require tracks to have a qualified techman with proper teching tools...which seems to contradict the intent of the class?

  16. #46
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    Pretty much 14.5 cubic inch rule is from
    The Glory Days of the Flathead.

  17. #47
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    Quote Originally Posted by flattop1 View Post
    Pretty much 14.5 cubic inch rule is from
    The Glory Days of the Flathead.
    I was going to say, from max bore and stroke for a stock block flathead.
    Living on the edge can get you a little more. Lol.

  18. #48
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    omaha nebraska
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    well that doesn't seem to make any sense...using an old "flathead" rule when most everyone is running either a clone, animal or black predator.....

  19. #49
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    The Briggs & Stratton Raptor engine features a bore between 2.56125 and 2.5625 inches and a stroke of 2.438 inches. This corresponds to a total engine displacement of 12.48 (204.67 ccs) cubic inches. Briggs called it the model 12.
    So you can see that you were allowed to make some modifications to get to 14.5 CID (237.8 ccs)

  20. #50
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    Quote Originally Posted by Jimbo View Post
    The Briggs & Stratton Raptor engine features a bore between 2.56125 and 2.5625 inches and a stroke of 2.438 inches. This corresponds to a total engine displacement of 12.48 cubic inches per engine cycle. Briggs called it the model 12.
    Ahem

    Model 13

    130232 was a popular model number for racing.
    Maximum bore and stroke that would fit in the stock block netted near the 14.5 cu. Inch limit.
    .060 overbore, and plus .200 stroke, specifically.

  21. #51
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    iowa
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    Quote Originally Posted by 95 shaw View Post
    Ahem

    Model 13

    130232 was a popular model number for racing.
    Maximum bore and stroke that would fit in the stock block netted near the 14.5 cu. Inch limit.
    .060 overbore, and plus .200 stroke, specifically.
    I thought same thing
    Airtight Garage Est 1982
    Waller Racing
    Phantom Chassis
    Dover Power
    Paid 4 cycle subscriber

  22. #52
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    Sorry guys years ago i built a ton of WKA legal FLATHEADS but i never built a 14.5" FLATHEAD.
    Since the Briggs OHV Animal came out in about 1999 i've been out of the flat head business and i don't miss it

  23. #53
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    Oct 2013
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    Grant,CO.
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    I could be wrong, yet I think 250 is a CC limit for some of the kart racing insurance companies.

  24. #54
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    May 2018
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    31
    Quote Originally Posted by Jimbo View Post
    Where are the rest of the rules, if any?
    I'm interested in ones that allow OHV engines.
    Jimbo, Several tracks out here my way running 14.5 SBO Class.... 14.5cid Max, Cast Block, 6.5hp or less from factory, 3/4" pto shaft is basically the main rules. Some allows Billet Heads, some don't. Billet side covers legal. Raptor, Blockzilla, Animal, Clone, Predator all legal to run. Any stroke, any bore, any cam, any valve train, any carb, any intake, any exhaust, any flywheel, any ignition. Doesn't matter what you have as long as your not over 14.5cid

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