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Author Topic:   dry slick 2 link suggestions
gould
Dirt Forum Champ
Total posts: 730
posted May 08, 2005 06:40 PM  
What works for you when the track slicks over? My car was awesome in the heat race. Come b-main time it was loose as he!!. I did drop 2 lbs of pressure in the RR before the race.

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x13jc
Dirt Freak

Total posts: 390
posted May 08, 2005 06:56 PM  
to be able to fully help you we need your setup. Springs, shocks, weight percentages, stagger, etc.

A stab in the dark would lead me to say add more rear percent.

gould
Dirt Forum Champ
Total posts: 730
posted May 08, 2005 08:32 PM  
lf 600
rf 700
lr 225 in front
rr 200 to the rear

left% 52
rear% 60
cross% 50.5

1/2 stagger front
1 1/2 stagger rear

off the top my head my shocks are
lf 76
rf 77
lr 94
rr 93


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dirtbuster
Dirt Forum Champ
Total posts: 2007
posted May 08, 2005 08:39 PM  
where was it loose, all around, entry, middle, exit?

badfastjr
Dirt Maniac

Total posts: 193
posted May 08, 2005 09:49 PM  
i dont know if this really makes his car loose but dont his front shocks seem really stiff to you guys, could this be keeping the weight from transfering to the back of the car and not letting it get forward bite? I dont know what stiff front shocks would do, but it just kinda jumped out at me.

gould
Dirt Forum Champ
Total posts: 730
posted May 09, 2005 04:28 AM  
loose on entry

trasrat89
Dirt Full Roller

Total posts: 46
posted May 09, 2005 05:39 AM  
Get rid of the stagger on the rear. How much left rear bite do you have? Too much LR bite will make you loose entering. Front shocks do look too stiff. We run close to your setup. Our shocks are:LF-20/20, RF-30/30, RR-30/30, LR-20/20. Shorty bar- 2nd hole from the bottom of the pinion & 7" up on chassis, & 70 lbs. LR bite. Our car is bad fast on dry slick. Could you possibly be over driving the car coming in? On a dry slick track, you have to slow down to be fast. Just a thought.

dluna
Dirt Freak

Total posts: 334
posted May 09, 2005 10:30 AM  
Trasrat -

What weight percentatges are you running on your 3 link to make it so good on the dry?

Short trailing arms, or LR short, RR long? What angle?

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 09, 2005 10:52 AM  
Are you running a 90/10 pullbar shock?

trasrat89
Dirt Full Roller

Total posts: 46
posted May 09, 2005 12:12 PM  
dluna,I'll have to look at my scale sheet tonight to get that info for you. Both arms are short at around 7-9 degrees. We took some angle out because our track had been so rough. This last week the track was very smooth & dry as heck. We left them alone & put on the shorty bar, then put a 30/30 on the RR. I think sometimes you can set a car too aggressive, & then you just shock the tirs loose when there's no bite on the track. We came from 12th to 1st in 10 laps only to get caught up in a mishap with 3 laps to go that landed us in 4th. A week ago, we came from 18th,(due to a 1st lap flat), up to 4th.
Xtreme12x, we have never run a 90/10 pullbar shock.

dirtbuster
Dirt Forum Champ
Total posts: 2007
posted May 09, 2005 03:27 PM  
I would soften the front shocks. They seem really stiff especially for a slick track.

A stiffer spring on the LF will tighten entry some, so will a stiffer RR. You could also try lowering the panhard bar both ends. That will tighten the car in and to the middle. Raising any lead in the car or moving it to the right will help the car roll more and stick the RR on entry.

WE often lower rear air pressures if the track is smooth and slick. Dont rely on cross% from air pressure changes. IT may show an increase on the scales but with all that air it can balloon the tire and then you cant keep the full contact patch on the track, so you lose grip.

gould
Dirt Forum Champ
Total posts: 730
posted May 09, 2005 04:17 PM  
40lbs lr bite, yes 90/10 shock on the torque link. the more i think about this the more i think i'm trying to drive too hard. It was only my 3rd night in a mod. I have a 4" offset beadlock that will drop my stagger to like 1/2".

trasrat89
Dirt Full Roller

Total posts: 46
posted May 10, 2005 06:53 AM  
dluna, This was our last scale numbers. I'm going to set the car on the scales tonight, & if anything has changed, I'll post it cause where it's at now is where I'm going to keep it after the way it ran this last weekend.
Ride heights: LF-5"
RF-5.5"
LR-5.5"
RR-5.75"
Cross-51.7%
rear- 60.5%
left-52%
springs-LF-650
RF-750
LR-225
RR-200
80lbs LR bite
3/4" stagger in front
1/2" stagger in rear
Trailing arms at 9 degrees(both sides)
X-factor pullbar(red biscuit) at 17 degrees.
This is a good setup for our track,(3/8 mile, semi banked clay, semi tight corners. I will give props to my kid though as a driver. He rocks on dry tracks,(alot of gokart racing as a kid)

HERNDON
Dirt Full Roller

Total posts: 73
posted May 14, 2005 09:08 AM  
I run your same set up...Except LR 225, RR 175. Car is always awesome in the heats. Trail the RR about 1/4 to 1/2", plug the LR about 2 1/2" shorter than the RR, then add 20 LR for the feature. My car is very consistent, very fast, and very driveable. Now if the driver would just make a few consistent laps....

gould
Dirt Forum Champ
Total posts: 730
posted May 15, 2005 06:29 AM  
Last night I reduced the stagger and put a 4" offset on the RR and dropped my air pressure in the rears 2 lbs. I was gaining on them and like any other racer i wanted more and looped it. I've talked to some of the other guys that run a Harris and they say I need more LR bite.

jtno6
Dirt Forum Racer

Total posts: 87
posted May 15, 2005 07:59 AM  
could be over driven it in to the corner? my buddy was doing the same thing.he told me that the mod take longer for the rear to come around then the street stock.( mod is a lot lighter ,street stock is a lot heaver)you might put a 1 inch spacer in the right front

jtno6
Dirt Forum Racer

Total posts: 87
posted May 15, 2005 08:00 AM  
we was also told that in a mod you want more rear brake then front

OppendikeRacing29
Dirt Maniac

Total posts: 135
posted May 18, 2005 03:50 AM  
what does everyone think about less left side, helped me when it gets real dry, on high banked though

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 18, 2005 08:48 AM  
The only time I use the brakes on a dry track is coming out, but not much. Thats why you run more rear then front..

speedy46
Dirt Maniac

Total posts: 165
posted May 18, 2005 07:18 PM  
xtreme i just discovered why u are so slow!!!! u use the brakes period!!!!!


JK bud don't flip out

gould
Dirt Forum Champ
Total posts: 730
posted May 18, 2005 07:41 PM  
I increased my cross weight and lr bite. This should tighten me up. I will keep you posted after saturday.

gould
Dirt Forum Champ
Total posts: 730
posted May 22, 2005 04:53 PM  
OMFG!!!! The car was fast and drove very easily. Too bad the track was only one groove.

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racer17j
Dirt Forum Champ
Total posts: 5390
posted May 22, 2005 06:21 PM  
There were too many holes up there.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 23, 2005 10:05 AM  
Speedy gould and I don't run huge motors like you do so we can't just power our way past people lol...

Glad to see your getting the car figured out Ted. I'll make it over there one of these days to watch you.

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