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Author Topic:   moving front r/c
joeltjen
Dirt Maniac

Total posts: 182
posted August 30, 2005 09:54 PM  
unless i drive my car into the turn hard to the point of almost spining out and getting back on the throttle right away i pick up a push. track has beeen so rough lately i'm not getting accurate shock travel indications. by my seat of the pants feel it's like the front is bound up. i mean all the suspension is free but i'm thinking my r/c is wrong or going the wrong way. according to the program i have it's 2.5 inches left and 3.25 high. as the car rolls and dives it moves down to 2.8 inches high and 4 inches right of center. now im not sure how accurate this is but i'm thinking i need to move it farther to the left and down a little to "free-up" the front suspension. am i on the right track????

donslink1
Dirt Freak

Total posts: 318
posted August 31, 2005 06:04 PM  
I would think there is something bound up or something, you say your track gets rough maybe bent balljoints, control arms.
what do you have for springs and stuff like that on your ride?

dirtee1
Dirt Full Roller

Total posts: 28
posted August 31, 2005 06:43 PM  
what brand of car is this?

Dustejr73
Dirt Maniac

Total posts: 177
posted August 31, 2005 08:35 PM  
i have a lightning chassis with metric lowers and i had the same problem on a real heavy track...i lowered the front ride hts about 1/2 inch and it made a big difference. i ended up raising the car up to "factory" ride hts and playing with rear springs and pahnard bar adjustments. although i should say that mine pushed under power also, unless i could bury the car in and roll it over.

joeltjen
Dirt Maniac

Total posts: 182
posted August 31, 2005 10:00 PM  
had the springs out tonight and everything moves freely. lowered the rf lower a frame 1/4 inch on the frame which according to my program will move the r/c to the left some. the car is an older champion updated to a swingarm with a pull bar. we just recently raised the front ride heights so the frame has no rake to it , just tilts to the left, and picked up a ton of forward bite! this is why i'm thinking i'm not getting the weight transfer to the right front i used to. usually our track is dryslick and smooth but in the last week we've had a demo derby, tractor pull and over 6 inches of rain so the track surface has taken a beating. the car was pushy (in) early in the year but the r/f was too soft, not planting the tire. then the car went to rolling over on the r/r to the point of bottoming out. went from a shorty bar (15") back to j-bar (18") just below axle and 2" rake. still have 400# on r/r swing arm and after raising front ride heights up can still carry l/f all the way down in the heats. springs are lf= 850 rf=950 lr=350 rr=400 (up from 275) short swing arm on both sides. 53.5 left 58.5 rear 56.3 cross down to 250# bite from 320# this has helped plant r/r in but still tight out. if you go in "slow" and flat car pushes, only way in is fast and "toss it", ok in the heats but not cool in the feature when it's dryslick , pick up the throttle too fast and around you go, too late and push city! if it gets down off the bars it wont turn. thanks, john

irace74
Dirt Forum Racer

Total posts: 80
posted September 01, 2005 06:15 AM  
From the looksof your spring rates, I think that stiffening the left rear and softening the right rear might be a ticket for you. By stiffening thel left rear, you should tighten the car off. Softening the right rear should loosen you in a little and tighten you up comming off. I think maybe a sring swap is in order. For the front, the stiffer rt front should make the car turn in easy and get off tighter. The softer left front should make the car get in easier and have no effect getting off. To tighten getting off only, stiffen lf or lr. Messing with the rt side springs, when you gain tight going in you get loose comming off and vice versa. The right side changes both entry and exit while the left side changes one or the other.

If it were mine, I would swap the rear springs and look at what I get, the softer rt rear will reduce tire bite comming off of the corner tightening the car up. Comming in it will maintain wedge in the car better loosening entry and enhancing exit.

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