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Author Topic:   new setup questions
rpm20
Dirt Freak

Total posts: 338
posted April 05, 2005 09:02 AM  
i ran a 4 z last year with a 225 on the rear of the bc on the 4 bar left rear and a 250 on the swingarm of the rr.

this year i am trying a 225 clamped in front of the axle with the bc floating seperately on the 4 bar left side with a 200 on top of the axle on the right side.
i put her on scales last night and my cross and lr bite are way too low. like 43 cross and minus 200lbs lr bite.
any suggestions from others running this setup???
should the rr spring be more like 160lb.???

also changed front springs from 650-680 to 650-740 i thought this would help my cross / bite not hurt it. !!

[This message has been edited by rpm20 (edited April 05, 2005).]

[This message has been edited by rpm20 (edited April 05, 2005).]

wfoondirt
Dirt Forum Champ
Total posts: 505
posted April 05, 2005 10:15 AM  
Requardless of what springs that are in it you should be able to adjust whatever cross you need into the car with the weight jacks. The springs you listed are in the ballpark for that setup.

rpm20
Dirt Freak

Total posts: 338
posted April 05, 2005 10:19 AM  
what if i went to ..say a 275 lr and a 175 rr on top

Kromulous
Dirt Forum Champ
Total posts: 796
posted April 05, 2005 10:52 AM  
Your going about this all crooked.

Set the ride heights per whomevers car it is, and then go about scaling it out.

Follow proper scaling procedures. You negative LR bite, so that needs to screwed down, and the 3 others up etc. Look in the toolbox section there is a scaling procedure run down in there i believe.

What i meant by crooked is, you dont adjust springs to get scale numbers right, run the springs you want and adjust the weight jacks to get the scale numbers you want.

rpm20
Dirt Freak

Total posts: 338
posted April 05, 2005 11:09 AM  
thanks for the input, i know thats how to get the numbers but i was wondering if changing spring locations was contributing to it being so far off.

Kromulous
Dirt Forum Champ
Total posts: 796
posted April 05, 2005 12:31 PM  
I would say it is, especially on the right rear, on the housing etc.

GRTWallbanger
Dirt Maniac

Total posts: 196
posted April 05, 2005 01:27 PM  
I did the same thing to our car(as far moving the RR spring)I set the ride heights and scaled the car.I had over 300lbs LR heavy.Just keeping working the screw jacks evenly and you can get what you want.
I went 4off LR 4on RR and 2 on LF and 2 off RF.
Came down to 150lbs and the ride heights are still pretty good.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted April 05, 2005 01:41 PM  
150 is still a lot of left rear

samiller
Dirt Roller

Total posts: 14
posted April 05, 2005 03:09 PM  
do you unhook your shocks to scale ? if not try it.

hiredgun
Dirt Forum Racer

Total posts: 78
posted April 05, 2005 07:19 PM  
I will Pm you

rpm20
Dirt Freak

Total posts: 338
posted April 06, 2005 05:40 AM  
i usually do but didnt this time because i was just setting it on there and not doing a full scaling session until tonight.

the fact that the lr is on a coilover will make trouble doing that too though.

quote:
Originally posted by samiller:
do you unhook your shocks to scale ? if not try it.


rpm20
Dirt Freak

Total posts: 338
posted April 07, 2005 06:06 AM  
scaled last night with 20 gal fuel and this is where the numbers fell with me in the car.
would appreciate input, we run a fast 1/3 mile low bank (9 degree) track.

weights were 570 lf 503 rf
795 lr 680 rr
53.5 left 58 rear 51 cross

total w/driver 2450

springs 640lf 740 rf
220lr (in front clamped up)
200 rr top of axle

will be adding weight in middle of car offset to the right , about 60lb. tonight
z-4 rear suspension

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