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Post by speedrome on Jun 22, 2009 13:17:02 GMT -5
OK... I have now practiced and raced a F200... Thanks to everyone who helped me or loaned me parts! What was interesting is that I had a tough time turning faster lap times than I can in my Animal, even though the F200 goes faster. These Tilly carbs are like an on/off switch, so I had to change my driving style and be more aggressive. As well, I had much less rear grip with the F200, so I had to make chassis adjustments. So, I did OK, and managed to drop 4 tenths of my best time with the Animal. As well, after getting the carb adjusted (Thanks Todd), the F200 Kohler proved to have as much power as some of the Yamaha F200s, although Scott's out powered mine quite a bit. So, I have my hands full trying to be smooth in the F200, but I'll continue to bring it to NFRA races when I can make them. All that said, I enjoy driving the Animal and World Formula more than the F200. However, I'll give it some time to see how it grows on me as I improve... Yea, more than one race/practice day would be good..  How did the Kart run the rest of the day after tuning? Stopped shutting off right? What RPM and Lap times did ya turn? Temp? I still think the kart might have been over stuck.. Scott does have good ponies but Dont forget, Scott has been doing the 4 cycle thing for a Loooooong time, a better set up and proper driving will make a motor look like a champ compared to the rest. |
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Post by speedrome on Jun 22, 2009 13:22:22 GMT -5
btw paul, did ya go through that used carb before you ran it? I remember the clutch being VERY rough during engagement, this aint helping u either.. It was grabbing badly under stall.  All these things put together are going to make the Kart very difficult to drive. Its all in the details!  |
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Post by paulskirocks on Jun 22, 2009 13:46:23 GMT -5
Todd, it ran really well after you messed with it, never cut out, and the clutch got me out of the corners faster than my Vortex. I haven't checked the temps, but as far as rpm, it spun right up to 8800, where I only hit 8300 the day before with the same gearing. I got passed by Ron ant the start of the heat race, and still managed to reel him in for the pass. I was attempting the same thing in the main when Ron spun in front of me, causing me to spin 180 degrees. Ron got away and Randy got by me. I was able to reel in Randy for the pass, at least. My point being that my motor felt comparable to their motors, and way better than the day before. So, I am pretty happy, actually, and just need to learn the ins and outs of the carb and clutch, in particular. I'm looking forward to Reno!
No, I didn't do anything but put the motor on it and run it. Scott gave me some insight into the differences between a stock carb vs. a blueprinted one. So, I would like someone who knows these things to do some magic...
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Post by speedrome on Jun 22, 2009 14:21:29 GMT -5
So pretty good for just turning a couple screws huh?? lol The carb doesnt require any magic, just a fresh of gaskets (7 bucks worth) and a pop off check on the needle and seat to see if its working properly and a good cleaning.. I do this all for $35 bucks if you dont want to. The clutch needs a service, I can show you or do it as well. The 3 disc tomar is a very, very good clutch. It will be a LOT smoother than what ya got now and wont be such a light switch in the corners after a good rebuild.
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Post by paulskirocks on Jun 22, 2009 14:32:59 GMT -5
Cool. I'll be getting this to you after Reno and before the next time I race the F200. I'll get a pop off gauge one of these days, but I would like to make sure everything is hunkee doree before I start trying to maintain it myself.
Before the race I mentioned to Brad #42 that I didn't have high expectations based on Saturday's performance, and he told me to remember I said that at the end of the race. Funny thing is, although I came up short of a trophy, I had a lot of fun, and the motor did better than I expected. I drove worse than I expected, but I enjoy the challenge, and ended up having way more fun out there than I expected, even not knowing how to handle the F200.
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Post by speedrome on Jun 22, 2009 14:58:36 GMT -5
You did a good job Paul! You bought a bunch of used stuff, put it together yourself and got through a full race day without a failure.. Thats pretty good in my book..
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Post by paulskirocks on Jun 23, 2009 9:18:58 GMT -5
Thanks, Todd. So, my concern is that my head temp got to 500 degrees by the end of the race. My flywheel cover only has the center hole for the starter, so I'm thinking of drilling a bunch of holes...
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Post by speedrome on Jun 23, 2009 14:39:36 GMT -5
Yes, good thought... Make sure to keep them within the confines of the flywheel fan so it draws the air properly. The carb rebuild will help as well.. What sparkplug is in it? What gas did you use again?
BTW, it might be good to check motor for legality, this will let you know if everything is F200 kosher since you bought it used.. Might have higher compression, bigger cam, etc.. this may also effect temp and performance.
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Post by paulskirocks on Jun 23, 2009 14:50:20 GMT -5
Well, I would be happy to tech my motor! It is supposed to be F200 legal... Thanks for the point about keeping the holes within the confines of the flywheel fan. I wouldn't have thought of that...
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Post by scoots27 on Jun 23, 2009 15:44:50 GMT -5
I noticed an air gap between your fan cover and block alowingcooling air to escape. This could be fixed with metal tape between block and fan cover.
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Post by paulskirocks on Jun 23, 2009 16:33:08 GMT -5
I noticed an air gap between your fan cover and block alowingcooling air to escape. This could be fixed with metal tape between block and fan cover. Hey, thanks for pointing that out. I just thought it was Kohler's weird design, so I decided to remove the flywheel cover. What it uncovered was a big ARC flywheel and 3/4 inch spacers pushing the whole cover out to accommodate the flywheel. So, I am going to get some metal tape and give it a try. Thanks |
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Post by brad42 on Jun 23, 2009 16:33:53 GMT -5
I saw that gap too. Before modding anything on the motor, why not call the guy that built it? My last motor builder would have disowned me for good if I went drilling on one of his masterpeices. What did the plug readings say as far as rich/lean goes?
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Post by paulskirocks on Jun 23, 2009 17:25:35 GMT -5
Yep, I checked plug and it was white at the electrodes. Too hot. I also noticed that the high needle was only 1/2 turn out, so I think I was just too lean...
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Post by Mitch Wright on Jun 23, 2009 17:31:39 GMT -5
Paul,
Sounds like a good first outing and have Todd around to help point you in the right direction.
I agree with Todd on the Carb no majic, to have Todd give it a once over for $35.00 would be well worth it.
We have ahad a few guys buy used engines here from oval guys. I have found they will run a .065 seat where we run a .093.
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Post by speedrome on Jun 23, 2009 20:13:11 GMT -5
Good point Mitch... The .093 seat helps it run better in the low/mid range as well. Got them in stock.
Remember Paul, the needles are very sensitive to tuning and even an 1/8th of a turn can make a difference. 1/2 turn on the H is not uncommon, it just depends on everything else... What plug is in it?
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How did the Kart run the rest of the day after tuning? Stopped shutting off right? What RPM and Lap times did ya turn? Temp? I still think the kart might have been over stuck.. Scott does have good ponies but Dont forget, Scott has been doing the 4 cycle thing for a Loooooong time, a better set up and proper driving will make a motor look like a champ compared to the rest.
All these things put together are going to make the Kart very difficult to drive. 
