How difficult would it be to get a GX390 to rev to 8,000 rpm with stock size valve seats?

I know of a couple... Hint.... lots of port work and very good cam profile, I wont reveal everything . I will say this, there is a big difference in a motor that will rev to 8000 and one that makes power all the way to 8000....!!

Your right Zack. Might as well lock this thread and remove it. Doesn't do any good to talk about rules. But on the other hand, would this new ruling have been made if someone didn't bring up the question?

Glenn, it's my understanding it was already being addressed before you posted this.....

Quote....The problem I see with that is then they turn into go karts and that is not what the majority of us want....Quote

If this is the one thing that is keeping them like mowers instead of GO KARTS something is wrong, not to mention they are mostly concealed from view.  What about the engines, sheet metal,  hoods and fenders & so on that makes it a mower.  (Isn't it most important (to look as close to possible as still a mower).

I hope more than just US looks at this. all clubs and groups and racers alike.

most are as we speak and I'm sure it will be brought up at our local club's rule meetings......

BUT Jim in our mind in our interpretation we dont have a question we do not have doubt. We just build it. it not a lack of or intent to ignore or cheat.

   (gray area)

Here ya go simple to the point and fair to all. The rest of the rules cover it ie wheel base a minimum 42 etc. Who cares about the length the frame demensions above controls that. This would make ALL legal. Including those clubs that are starting the new limilted mods they can now prgress up into the top tier classes with just a motor upgrade.
Again just my 2 cents and thats all I am adding.

 

Its not a matter of ignoring or not caring. You must realize some of us were building these before the rules were made. Some interpret the rules a differently. These classes should allow more diversity in building. set a max width, taking a square channel frame and simply widening it from its original width by a mere 2-3 inches is far cheaper and easier than building a third frame rail and using 3 bearings on an axle. I mean jeeze they dont look like they used to anyways. these two classes are the elite the PRO SERIES so to speak. let us build it give a base line measurement and be done with it. For that matter why not allow a squre tube frame 1x2 for example. It would be easier and more cost effective than trying to make a flimsey wore out mower chassis hold up to the fastest class out there. Just my two cents. I aint gonna lie to ya. I been 15" wide from day 1 way back been racing them from the beginning. tech has never said anything. For that matter mine look more like a mower than many. I use real mower decks to boot. it dont matter to me they are built and i am not gonna change them even if it means stay home and play in my own back yard. I truly dont see where its a big deal. The only advantage is it leaves me more money and time to use elsewhere.

---

Exactly benewco we can scracth build a fx frame but we are restricted on these. And also the same size wheel and tore on the same axle WHY FX can run stagger yet the pro series to top teer classes cannot!!! OK I am done!!! AND BTW if you look hard enough you will see there are a few scratch built frames already running. they aint no faster than anyone else either.

well put.......to be honest I really don't think when the rules were made initially or even now, that they thought of this instance, for one because we are pioneering this particular class and are still learning what makes it safer and easier to build, not to mention more affordable with less parts breakage.....Our goal here should be balance and  (fairness) there is no way this particular issue gives an advantage.....also some myself included are building a new chassis almost ever year to capitalize on what we are learning though out the year previously.  therefore I think rules should be up for discussion and possible change due to these factors......just my .02......

 now....As a side note, I personally really like this class and I can tell you for a fact, that It has a good future in the racing industry. Reason being its a spectator magnet...!!!!  It's good for the clubs and racing organizations as far a revenue, and spectator attendance...!!!!

can't wait to see and here it when it's finished Drew.....