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Author Topic:   forward bite
dbradley
Dirt Freak

Total posts: 251
posted May 13, 2004 07:54 PM  
raced the other night at a 1/4 miler...Anybody have some general ideas about getting more forward bite..We are a little loose off...We run a Troyer coil over car..I know you all mostly run bar cars but how about a gear change vs corner percentage change???

R26MOD
Dirt Full Roller

Total posts: 53
posted May 13, 2004 08:45 PM  
May I ask what track?

dbradley
Dirt Freak

Total posts: 251
posted May 14, 2004 12:56 PM  
We run at bear ridge speedway in New Hampshire

dbradley
Dirt Freak

Total posts: 251
posted May 14, 2004 02:55 PM  
What we would really like to know is if we would get more out of a gear change or just try dialing out some of the left rear /cross percentage

R26MOD
Dirt Full Roller

Total posts: 53
posted May 14, 2004 07:28 PM  
We have a 2000 Troyer bar car, and we were loose last Saturday also. Our track has gone to the Hoosier checkerboard tire on the rear and the big block on the fronts. The driver says that it feels like the car wants to spin out, but I tell him it looks to me like the car is staying under him. But we change from a four link to a three link over the winter and that it might take time to get a feel for the car. We are thinking of putting a stiffer spring on the right front.

dbradley
Dirt Freak

Total posts: 251
posted May 14, 2004 08:11 PM  
We are new at the smaller track so we don't have a great set up. We are trying some things. What about even an earlier corner initiation point to try to get on the gas sooner??

racerwilson
Dirt Freak

Total posts: 357
posted May 14, 2004 08:42 PM  
dbradly I'd like to help.What are you running for coils and weights. Is the front and rear axle square? and what are you running for stagger and gear at what rpm.

dbradley
Dirt Freak

Total posts: 251
posted May 15, 2004 08:04 AM  
Thanks for the help wilson, I'm quite new to the set up end.As you probably figured I'm just the grunt help.I'll get back to ya as soon as I get the numbers...We are running tonight with a different gear so I'll let ya know how that worked

dbradley
Dirt Freak

Total posts: 251
posted May 15, 2004 08:07 AM  
We also run a 3/8 miler on sundays so we are going to have to wrench a bunch on sunday mornings. Any help for general switch over we would be greatful..We have a good set up for there.

dbradley
Dirt Freak

Total posts: 251
posted May 16, 2004 12:01 PM  
Now I've got the stuff for you all to digest....springs,RF 200# LF 250# RR 200# LR 225# Air pressures 8# LR all the rest 10# Stagger RF 84 3/4 LF 83 RR 91 3/8 LR 86 3/4 Ride Heights RF 5 7/8 LF 5 5/8 RR 6 LR 5 5/8 corner weights RF 352# LF 430# RR 731# LR 799# without driver in the car.. Havent weighed it with him in
49.7% cross weight 53.1% left side and 66.1% rear weight
Running a 696 gear, had a 671 last week and turned around 6100 rpms

racerwilson
Dirt Freak

Total posts: 357
posted May 17, 2004 12:34 PM  
I used to run a 4 coil Olsen car this was my base set up. Ran same set up for 1/4 to 1/2 miles. would just adjust stagger 4.5 on bigger tracks and 6-7 on smaller tracks.
have you tried your 3/8 set up at the ridge?


449.9 332
225 -------------- 175
|
|
/ 49%
|
|
800.8 | 729.2
200 --------------- 175

66.1%
Front stagger is good 1 3/4
rear recomend around 6.00
Front and rear axle square.
Do you run a spring bar on rr and what is preload and what spring rate?

Other question is what are you using for shocks?

dbradley
Dirt Freak

Total posts: 251
posted May 17, 2004 08:11 PM  
We don't run a spring bar, but it sounds like it has possibilities...We run Koni 9" all the way around. Fully adjustable..Can't from inside. If you could explain the spring bar as well as shock suggestions that would be great

[This message has been edited by dbradley (edited May 17, 2004).]

zeroracing
Dirt Forum Champ
Total posts: 1875
posted May 18, 2004 07:04 AM  
if your trying to tighten exit then go with a stiffer lr spring, or cut down some stagger.

pistol47
Dirt Newbie

Total posts: 4
posted May 18, 2004 07:06 AM  
hi, dbradley and racer wilson, we do run a spring bar and it is set at about 3and7/8 preload, i believe it is a 650 spring on it. I get alot of movement in the spring going around under caution. from the looks of your set up we headed the wrong way on the spring rates. I had a 175 rf and a 250 lf 200 rr and a 225 lr, but the car felt way to soft on the right side and the tin work was hitting the ground, so we upped the rf and dropped the left rear. i also raised my ride heights but we didnt get a chance to try it.the old springs seemed to work ok on the 1/2 miler but i dont think i was up to speed yet.

racerwilson
Dirt Freak

Total posts: 357
posted May 18, 2004 03:24 PM  
is it a low rod or high rod in the rear? Springbar would recomend starting out with a 750 or 900 spring. Spring bar on right rear allows the right rear to drive forward under throttle and will straighten out angle of car on exit and tighten you up from middle out.

dbradley
Dirt Freak

Total posts: 251
posted May 19, 2004 06:05 AM  
Racer there are no rods in the rear..the spring bar is headed uphill in the front.

dbradley
Dirt Freak

Total posts: 251
posted May 24, 2004 07:13 AM  
TTT

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