Tag Archives: bigs and littles

I found bigs and littles I can race and run on the street

At least until it rains, then all bets are off.

The tires (by Hankook) are not that bad in the wet, but put them on a 1600 pound car with brakes that can stop a much heavier car even without power assist and then add water in typical TX thunderstorm amounts and with a car that is naturally tail-happy… Wet weather driving will be done quite cautiously.

The main problem I’m having now is getting the right size wheels for the tires I chose, especially the front ones. You wouldn’t think 15 X 6 wheels would be so hard to find at a reasonable price, but they are. The rear wheels are comparatively easy, but where it really gets hard is getting both wheels in the same style and in compatible offset. In fact I’m having so much trouble finding the compatible offset I’m strongly considering using wheel spacers up front to make the mounted offset compatible.

That’s just for the street, for racing I don’t give a flying fig if the fronts match the rears as long as the widths and offsets are right and the wheels are light enough. And it is looking like the race slick wheels are not going to match styles at all, the front tires are 22/6.0-15S while the rears are 23.5/10-15S in a softer, more grippy compound. I’m definitely swapping at least the rear springs and shocks when I race SCCA so that I get a better balanced car. That and I’ll need to lower the car anyway as the race slicks are about an inch taller than the street tires which would totally screw up the undercar aerodynamics unless I dropped the rear back down to match the front. And since I’m swapping one set of shocks and springs anyway it won’t take but a few minutes longer to swap both sets. The time consuming part would get done beforehand as I adjust the ride height and set the damping on the shocks before labeling which corner they go on and putting them in some kind of carrying case.

And I have good company in having issues with controlling which way the car is going. Even the best hike the inside front wheel .

And on that note I close this post and bid you farewell.

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So much done, so little accomplished

I was out of the house almost 7 hours today. I had a 20 minute procedure done in Lewisville and spent just over 6.5 hours getting to and from it. And I had to skip lunch because I was constantly running around to catch a bus or train with never enough time to stop to buy food. So, I had a lot of time to sit and think about things, and when I wasn’t thinking about things I was thinking about my second-favorite subject, the Mid-Bucket.

The big thing weighing on my mind about the bucket is getting rid of its inherent oversteer. There’s just way too much weight on the rear axle for 4 equal-size tires, and not enough tire selection in 15″ rims any more to be able to correct it with bigs and littles without giving up a ton of front grip. While I realize that excessive front grip is the problem, my philosophy is don’t give away what you have too much of in relation, get more of what you don’t have enough of. So, while I’m willing to find larger rear tires to get more rear grip, I’m completely unwilling to get smaller front tires to get less front grip. This is a race car, you always, always, ALWAYS want more, especially more grip. It may be a race car that I’m going to drive to the race and (hopefully) drive home, but it’s still intended to race and win.

Before I get back to the bigs and littles there are ways to keep the tire size “square” (same on all 4 corners) and reduce oversteer without completely killing the front grip. That can be done with restricting wheel travel on the front while getting absurd amounts of travel on rebound on the rear with long travel shocks and bump stops that only allow the same amount of compression as the front suspension, so that as the car rolls over on the outer tires the inside rear tire is still carrying a lot of weight because it still hasn’t extended the spring fully.

Another way is aero loading the rear more. That one is a little more tricky as rear grip will vary as the square of speed, so the car will still be loose at low speeds but potentially plowing tight as the car goes faster. This is not the way to go. Obviously I’m going to go for as much downforce as I can get, but balanced, and after I get the mechanical grip balanced, not before and definitely not “instead of”.

And I keep falling asleep on the keyboard so Nighty-Night…