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Author Topic:   Push In , Loose Off
DEEDDUDE
Member
posted February 10, 2002 09:08 AM
Need some help guys. 3400 lbs., 3/8 banked. car seems to be real close on set-up. a little tight going in, middle ok, and a little loose off. I tried a little different line going in to loosen up entry, but was real loose on exit. I played with the air pressure and made car neutral on entry but was loose in middle and exit. What would you guys do? Thanks for the help. Deed


BK19
Member
posted February 10, 2002 10:22 AM
whats your crosswieght,tire stagger,pressure,and spring rates?


DodgeBoy76
Member
posted February 10, 2002 01:45 PM
You might also pull the shocks off and run them through the motion of collapsing them and pulling them out fully extended and besure that they dont bind up.


go4win
Member
posted February 10, 2002 06:58 PM
Thanks for the replies, Don't have all the info you need but, this is what I have. 3400 lbs. metric. LF 950, RF 1050, LR 225, RR 175. pro stock mount shocks, stagger 1/2", do not know cross or rear %. over 50% cross using the jack and socket method. I hav'nt had a chance to get it onto some scales. The car was loose all the way around so I made some changes over the winter and moved the weight forward. This has helped the most. any other info needed just ask. Deed


Machinah
Member
posted February 11, 2002 04:22 AM
Check your private mail. I've sent a table detailing most of the common problems and some solutions on this subject. I can't post it here because it doesn't translate right, but will send it to any who would like a copy. E-mail me at machinah@aol.com


DEEDDUDE
Member
posted February 11, 2002 06:12 AM
Thanks Machinah, That chart looked to be backwards, I had to look at it a couple times. "to tighten, to loosen". Thanks for the help. Deed


cd2
Member
posted February 11, 2002 07:20 AM
DeedDude You can put a smaller tire on left front and this will loosen you in and tighten you off. You can add cross weight with jack bolts if you have them ,this will do the same.You can also change to a 850# left front spring.Most problems you have off is caused by one getting in. cd2


cd2
Member
posted February 11, 2002 07:42 AM
DeedDude you might have to put more l.s.weight in car to get it to turn in better .This will also tighten you off. Check front toe setting might be toeing out too much going in and making car tight. cd2


DEEDDUDE
Member
posted February 11, 2002 09:21 AM
Thanks cd2,
I lowered the left front pressure by 2 psi., and it helped entry, but still loose off. Youíre saying that if I add cross this will help entry? Iíll try that. Thanks for the help. Deed


marty
Member
posted February 11, 2002 12:52 PM
DEEDDUDE, is the car pushing on entry when you drive it in or is it just pushing under braking? If its pushing as you apply the brakes you could try increasing the the rear brake % and the rest of the turn may just fall into place.


cd2
Member
posted February 11, 2002 03:40 PM
DeedDude When you add l.r.weight it will help the lossen up going in and give it more bite off.When you dropped 2# on l.f.this took weight offl.f.& r.r. & added too r.f.& l.r. increasing cross weight.Work with what i posted above and the car should get better.How much banking does this track have? cd2


DEEDDUDE
Member
posted February 12, 2002 06:22 AM
CD2, I added about 1 1/2 rounds to the left rear we'll see what happens saturday. No one really knows what the banking is. I looked for the info. and couldn't find any. Thanks for the help. Deed


racer17j
Member
posted February 12, 2002 01:12 PM
can you or have you tried to mess with offset wheels you might try putting less offset on the left rear and more in the right front


race8k
Member
posted February 12, 2002 03:47 PM
One thing that people forget to look at on a handling problem is the easiest to adjust.The driver.Many times a tight in loose off is caused by the driver driving to hard into the corner causing the push then shaking the car loose to get it to turn causing the loose off condition.


race8k
Member
posted February 12, 2002 03:48 PM
One thing that people forget to look at on a handling problem is the easiest to adjust.The driver.Many times a tight in loose off is caused by the driver driving to hard into the corner causing the push then shaking the car loose to get it to turn causing the loose off condition.


DEEDDUDE
Member
posted February 12, 2002 05:18 PM
Race8 you are correct and I was aware of how I was driving into the turns. Not only did I adjust my driving style, but also the line for entry.

The tires show wear on the middle and outside. I might add some more neg. camber to the right front. I'm already at -3.5 deg. Wouldn't to little camber in the right front make a car push on entry?

Thanks for the help guys. If anyone has more ideas please post. I'll let everyone know how it turns out after Saturdays practice. Deed

DEEDDUDE
Member
posted February 16, 2002 08:01 PM
Guys thanks for the help. Car is much better than it was. I'm still a little loose on exit. The track was dry slick so I jacked the left rear up another 1/4" and added a 1/2" spacer to the left rear. The car was real fast, but again loose on exit. I also worked on my throttle linkage to slow down the carb and used the pedal as if there was a egg under it. Would changing the RF spring rate by 100lbs. help to much and make the car to tight? This will give me a 200lbs. split, is this to much? Thanks again for all the help. Deed


cd2
Member
posted February 17, 2002 09:30 AM
Deeddude If the car is still loose getting off you can put more spring on right front or more on left rear.Does the car still try to be a little tight in,if so put more spring in R.F..This will loosen you a little going in and tighten you off.If the car is setting good going in ,goes around good but loose off put a stiffer spring on L.R.When you make a spring change be shure to check ride heights before and adjust chassis back to same height after spring change.If you do not do this you will be making two changes in stead of one.when you put 1/4"on L.R.you did add a little weight on the L.R.
When you put the 1/2" spacer on you probley took about the same amount back off.If the car seem to be tighter off it was probley due to tracking off set.If it was me i would put a 1250 spring on R.F.and take a 1150 too the track at next practice.Also i would take a 25#& a 50# stronger L.R.spring.If you change any spring check that ride height before and after.You need to get car on scales ,like i said before might not be enough L.S.weight.Also check with track owner about degree of banking on track. cd2


DEEDDUDE
Member
posted February 17, 2002 08:59 PM
CD2,
Thanks again for the help. I added some more left weight and it helped entry. I was at 53.1% before I added the L.S. weight. IF I put a 1150 on the RF that will give me a 200 lbs. split is that too much ? You also suggested a 1250 RF. Iíve never made a spring change and donít know what to expect. Will this tighten the car a lot on exit and go back to working on air pressures to adjust ? Thanks again. Deed


cd2
Member
posted February 17, 2002 09:41 PM
Deeddude putting a stronger spring on the R.F. will tighten the car more on exit, how much depends on a lot of other things.I can't say just how much. A 1250 will tighten you up more than the 1150.What i would do is get the air pressure right,get the weight and springs right and work from there.Get the car on some scales and let meknow how much L.S.,rear and crossweight you have now.Also how much stagger front and rear.Check and see if your wheels line up front to rear on both sides also and if your rear end is square in car .cd2


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