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Author Topic:   Pure Stock Car Setup Loose in, Loose off
fordham14
Dirt Newbie

Total posts: 4
posted August 24, 2005 04:05 PM  
Hi guys, First off let me say I think this is a wonderful Place. I do have a few questions at our local race track is a 1/2 mile. We run purestock. rules are that we must run 8 inch tires and wheels. The car is a leaf spring car and must way 3300 lbs. My current setup is as follows
Tire sizes lf 89 1/4 round 12 lbs air
rf 90 round 16 lbs air
lr 87 round 14 lbs air
rr 90 round 14 lbs air
springs are as follows
lr 250 lb leaf
rr 225 lb leaf
rf 1300 lb
lf 1100 lb
weight is approx 53% left and 50% rear

staggar is apprx 3" on rear and 3/4 on front

is there anything I can do to fix the loose in , loose off sceniero?
Thanks in advance

jay116
Dirt Freak

Total posts: 428
posted August 24, 2005 06:00 PM  
thanks all help is appreciated. I will glaldyly accept any feedback!

Steve Dupree
Dirt Freak

Total posts: 316
posted August 24, 2005 08:01 PM  
I know we have done the same but before you start changing springs lets look at the stagger you have. To much stagger in the rear if you are loose off and loose in. You will probally lighten that right front spring really soon but first if loose get rid of stagger in the rear. If it was me with that weight i would look at 1100lb. rf and 1000 lf and a little less in the rear if track is smooth. If you need anymore info just ask but first get rid of stagger in the rear. That will help you alot!!!!!! You dont need to change cross weight for this problem. I wish people would read all the info before giving someone a hundred things to do. Change those rears to maybe 200lr and 175 rr. Always listen to all advice before you go and do something. Apperently the guy before didnt take in to consideration you had 3" stagger in the rear. We run more stagger in the front than you do and will help you also on tighten the car up. Tacky we run 2" max on the rear and we run 3" always upfront. In the main when dry slick we run staright or maybe a 1" stagger in the rear and our cross is 49.1 50.2 rear and 53.0 left Hope this helps a little not being rude to the guy before but if we are going to try and help someone and they give us info lets try to answer them correct. He gave us all his weight and tire preasure along with stagger and you told him he needed more cross!!!!!!!!! Look at the rear stagger before answering him and sending him down a wrong path.

fordham14
Dirt Newbie

Total posts: 4
posted August 24, 2005 08:31 PM  
Thanks again guys. Information is something that i can not get enough of. I wish it was Saturday so i could go to tinkering!! Keep the feedback comming

doubletrouble racing
Dirt Forum Racer

Total posts: 88
posted August 24, 2005 08:45 PM  
We run purestock class as well.With rules that dont allow weight jacks and spring spacers the only thing to really play with is tire size (height) and pressures.We put the biggest tire we could on the right front and a little tire on the left rear this gives the effect like haveing a weight jack up in the right front.We also played with pressures the MOST tire pressure we run is 15lbs in RF and the least is 10.5 in the LR.I find it best to pay around alittle with these but remember do one change at a time so rather it improves or makes it worse you now what it was that changed it....I have made mistake by changing mor then one thing at a time you can only imagine where that led.Take notes write down changes and comments of how it reacted then you can always reveiw later when trying to change something eles.

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Visit www.doubletroubleracingteam.com

Flanndad
Dirt Freak

Total posts: 255
posted August 25, 2005 05:14 AM  
Hey fordham14, I'm with Steve on this on.
Looking at your tire sizes, I would switch the tire's on the left side, this would give more stagger in the front and less in the rear..
You didn't mention the wheel backspacing, but seeing you run purestock, I would assume they are all equal, if not post your backsacing's.

fordham14
Dirt Newbie

Total posts: 4
posted August 25, 2005 03:12 PM  
flandad switch while switching the tires on the left should i keep the same pressures?

Steve Dupree
Dirt Freak

Total posts: 316
posted August 25, 2005 05:05 PM  
I have been changing my preasures all the time and no one at my track really run much preasure. After talking to Dirt_ Track _ girl and trying a few things we are up to 18 lf 20rr 25rf 25 rr. You have to look at new tires and how they wear and radials are not the same as `bias ply tires. If i was you i would up tire preasure and add front stagger atleast 2" rollout on the front and run 1" in the main with new preasures. When you put a new tire on the right front and you come in after a nite of racing and the tits are still on the two inside rails of the the tires you know the tire is rolling over to much and not working correctly. The same goes for the left side and rear. Look at new tires carefully when you use them. I no you were asking someone else but all input is good before changing anything. " GET ER DONE "

Flanndad
Dirt Freak

Total posts: 255
posted August 26, 2005 06:28 AM  
I run about the same pressures you do, but I run American Racer's in a street stock.

If I was you I would go get one of those infared heat gauges, I got mine at Sears for about $70.

This will help figure out your tire pressures, Read each tire in three places, right, left, & center.
Have someone take temp readings and tire pressure readings as soon as you pull in.

Learn how to read the temp's, this will help for setting front end camber and all tire pressures.

CLBaker25
Dirt Maniac

Total posts: 193
posted August 26, 2005 12:49 PM  
I think Steve Dupree has the right idea!

Steve Dupree
Dirt Freak

Total posts: 316
posted August 26, 2005 05:02 PM  
Thank you flanndad and clbaker25. We take alot of pride in info we give out and what we take in. I guess you would say we are new to racing the circle track but being a bodyman it fits right up our alley. We have only like a 100 or so races under our belt so buy ne means do we know everything. But we learn everyday and every race and are always trying something different to find a advantage. I always try to answer ?s with the best of my ability to help other drivers. I know at first when we wrote for help we would get alot of responses and some not all you could throw out the door,But as a new racer how do you know that. We;; you ask ?s and weigh all the answers out and then you start too learn as you try new things. One thing i will say is that you must have good rear % for a car to run consistant every week!!!!!!! I dont care what the weight is atleast have 50 % or load it on the trailer. LOL Everyone here runs like 19 as a max on there left rear most less and with what i have been learning they are screwing up and so were we. Maybe with the help of a few that are obsessed like i am i will learn what i need to do so i can help others. We live this sport day in and out and thats not a joke...... Thanks to all for all the help and knowledge i learn every day. Thanks so much!!!!!!!! Steve Dupree PS I build a pretty mean carb for fords so if you need one and rules allow them drop me a line. Thay put a 4412 to shame and thats no joke..... Now go away rain tomorrow is raceday. lol!!!!!! " GET ER DONE "

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