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Author Topic:   WHEELBASE
THERON#40
Dirt Newbie

Total posts: 4
posted December 13, 2005 04:32 PM  
I run a car with a wheelbase of 115,
the rules minimum is 108,
do you think i should shorten the wheelbase?

Steve Dupree
Dirt Freak

Total posts: 399
posted December 13, 2005 04:58 PM  
well if new to racing it will help you so go with it and find another car next year or then shorten it.

oceanridge motorsports
Dirt Full Roller

Total posts: 49
posted December 13, 2005 06:33 PM  
big track or bull ring ?

john56h
Dirt Full Roller

Total posts: 67
posted December 13, 2005 08:06 PM  
I run a car with a 115 inch wheelbase. It out handles most of the 108's. What kind of car are you running?

racin78p
Dirt Freak

Total posts: 341
posted December 14, 2005 02:05 PM  
Tight track with tight turns and low banking(1/3 - 1/4), short wheel base. Big track (1/2+) with wide high banked turns, the longer wheel base will not hurt. I would definetly get into a 108" wheel base car soon. Even on bigger tracks, the passing game is sharper and quicker with the shorter wheel base, if the car is set up right of course.

Race on.

------------------
racin78p
if it ain't fun, then don't run

THERON#40
Dirt Newbie

Total posts: 4
posted December 19, 2005 10:27 AM  
I race the car on a 3/8mile track and the car is a 64 chevelle

john56h
Dirt Full Roller

Total posts: 67
posted December 19, 2005 11:07 AM  
The 64 to 72 Chevelle was always a favorite among stock car racers. They will out perform the Metric chassis. See the topic "71 Skylark" in the pure stock / bomber category. I have raced a 65 Chevelle (F85) 115" car for about 15 years and it's still out handling the Metrics.

THERON#40
Dirt Newbie

Total posts: 4
posted December 19, 2005 11:30 AM  
I just made a switch from pavement to dirt this past season, the car didnt do that bad.
what spring rate,ride height and percentages do you run in your 65 chevelle John?

racer17j
Dirt Forum Champ
Total posts: 5508
posted December 19, 2005 04:11 PM  
We have had quite a bit of success on both dirt and asphalt with the same basic setup. Springs: Front Springs are 9.5" x 5.0" Afcoils with Afco spacers (cut about 3/4" off the spacers) RF=1050, LF=950, RR=225, LR=250. Shocks (stock mount): front=Carrera 3949, rear= Carrera 2858. On dirt we ran with and without the front sway bar. It didn't make much difference so we left it off to save weight. Asphalt required the sway bar or the car leaned over too much. We tried a rear sway bar, but it worked better without it on both surfaces. For dirt, you might benefit from shortening the upper trailing arms about 3/4" to improve pinion angle and increase forward bite. The stock steering box is too slow. Switch to a IROC Z box or put in a steering quickener. Other than that, just keep on top of brake adjustment and you should be good to go. The best advantage of the long wheelbase is that the car will handle the bumps and ruts better thant the shorter Metrics and Camaros. We could always run right through the rough spots on the track while everbody else was tiptoeing around them. Good Luck! Do you have any pictures?

THERON#40
Dirt Newbie

Total posts: 4
posted December 20, 2005 09:50 AM  
I was talking to Sleepy Gomez from Stock Car magazine, and he was telling me i should shorten the chassis in the middle.That way i wouldnt take away any weight from the rear of the car.He said it is well worth the trouble.My tracks minimum weight is 3000lbs and the car is 3300lbs.I sure would like to get the car below the minimum.

Normal Sullivan
Dirt Forum Racer

Total posts: 86
posted December 20, 2005 10:05 AM  
14 inches of frame don't make 300 pounds.

CLBaker25
Dirt Freak

Total posts: 219
posted December 20, 2005 12:59 PM  
How about 14 inches of car? You throw in the weight of 14 inches of body, 14 inches of rollcage and 14 inches of frame and you would be suprised how much weight you lose off the car.

john56h
Dirt Full Roller

Total posts: 67
posted December 20, 2005 07:22 PM  
It all depends on what condition your car is in right now. If the whole car needs to be rebuilt and reskinned anyway, it might be worth it. But, if the car's still in pretty good shape, I don't think it is worth all the work. You'd be better off building a new car that's on a shorter frame to begin with. Then you could sell that old 64 Chevelle to someone who is interested in racing with one of the Vintage racing clubs. Why cut-up a perfectly good car if you don't have to? It has survived all these years as a 64 Chevelle, seems a shame to ruin it (unless it's already beat to death).

Normal Sullivan
Dirt Forum Racer

Total posts: 86
posted December 21, 2005 04:23 AM  
7 inches of car, not 14. I'm saying if you don't re-skin it, using a body with way less overhang, what you gain probably isn't worth the effort. Run it at 115", or start with something shorter to begin with. JMO

sideways
Dirt Forum Champ
Total posts: 748
posted December 21, 2005 05:59 AM  
I drove a 112"wheel base car(2 to be exact) and one 108" wheel base car.With that said I am sticking to the 108".Lighter 4" of wheel base made all the difference in the world to me.

  

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