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Author Topic:   Loose on the dry slick
Dirt Maniac

Total posts: 193
posted August 02, 2003 11:35 AM  
We just built a new Purestock & ran it last week & it was wicked loose in the feature.

We ran the stagger on the tire the same as our old car but it didn't respond the same.

I will still need to get the car on some scales this week, but I was looking for some advice on how to tighten it up for tonight on the dry slick.

We have a 83in tire on the Left Front & a 88 on the Right Front.

On the back is an 86in on the Left Rear & a 85 on the right.

going into the corner it was starting to come around....really loose!

the guy who helps me wants me to try a smaller tire on the left front...... I wanted to try some different rear springs....

anyone have Ideas that I could try til I can get it scaled???

Dirt Maniac

Total posts: 149
posted August 02, 2003 11:54 AM  
Cars are like women,you can try your old moves on them,but they all respond a bit differnet.

Your first baseline of attack is knowing where your percentages are...and where they need to be. I am a firm believer in getting facts down and knowing where your at instaead of guessing where your at.

What are your offsets and where are they at?
Tire pressures?

Run 2" on the right side...3" on the lefts.
Try going flat across the back....with maybe 3" of stagger in the right.

Full fuel load....always.

Make sure you do not have a bum shock or spring somewhere.

Sometimes when building a new car,you can change so much just by welding a cage onto the frame.

Also check the camber on the right front.

Sometimes trying a set up that might have never crossed your mind.....just may be the answer.

Dirt Maniac

Total posts: 149
posted August 02, 2003 11:55 AM  
That should read...3" of stagger in the front....not right.

Dirt Maniac

Total posts: 193
posted August 02, 2003 12:06 PM  
hmmmmmmmmm... I did brake a left rear shock in the heat race when avoiding an accident & we stuck an old one on for the feature.

what do you recommend for the camber on the Right Front??

tire pressure was at 27 RF, 25 LF, 23RR, 20 LR if I remember correctly.
We are not currently running tubes in these..

I will be getting some scales on Monday so I can post the weights.

Oh yea, its an '84 Cutlass with a SBC 305, turbo 350 tranny.

I am guessing its 3000 lbs race ready.

Dirt Maniac

Total posts: 130
posted August 02, 2003 12:18 PM  
I must say, I have never heard of running 5 inches of stagger in a pure stock. Myself and my counterparts run max of 1.5 in. Crazy amounts of stagger only compensates for something else that is wrong. Get your weights right, your springs and shocks right and then you shouldnt need so much stagger. I personally would make sure your rear end is square, if it is then maybe lead the rt. side to tighten. If I had to run those tires I would run the like this..... 88 rf, 86 lf, 85 rr, 83 lr. As teamstertom said I like to go flat across the back as well, but you dont have much choice if those are the only tires you have.

Dirt Maniac

Total posts: 193
posted August 02, 2003 01:05 PM  
I have other tires, I was just useing what worked on our old car.

Our other car was 3 seasons old & rolled once so that car was prolly way outa wack.

just looking for some ideas on what to try for tire sizes & pressures to tighten it up for tonight.

Dirt Maniac

Total posts: 149
posted August 02, 2003 10:12 PM  
Bummer of a nite..... Since my car isn't done,I help a friend with is Dirt Sportsman and it rained cats and dogs as track packing was to start. Rained out!
My other friend I help runs a Wissota Super Stock,and has blown 2 motors this as any friend would do.....I borrowed him my brand new,0 laps 355 Chevy so he can run next weekend......isn't that what's racing is all about....helping friends?

Pure stock racing is so fun because of the challenge of making a stock set up work. One of the biggest problems with Pure stocks is how the rules are enforced and what is okay to do and what is plain cheating.

One of the keys to any Pure stock set up is having all the pieces together to make a working combo and then into a winning combo.

Tires are major part of the puzzle. Need nice soft tacky sticky tires for a dry slick. Do some homework and look for a soft compound rubber street tire. I have seen racers take a belt sander with a course grit belt and rework those tires getting rid of that hard shinny surface.

Check out your front parts....tie rods,ball joints...even a bent spindle. Those metrics hate contact anywhere around the spindle area. Take a good hard impact on a rim from the wall or another car,and that will mess up a spindle. Sometimes the problem is not the rear of the car,but can be in the front as you over steer making up for bad front end parts.

In my heavy 72 Impala and 75 Monte,I ran 22lf,27rf,17 or 18 in the rears,depending on track conditions. I ran tubes for many years and had good success....but everyone plays the game a bit different.....

x factor
Dirt Full Roller

Total posts: 34
posted August 03, 2003 06:50 AM  
A few things that will help tighten a car up:
1) increasing rt front and/or lt rear tire size
2)decreasing lt front and/or rt rear tire size
3)moving the rt front and/or lt rear farther out ie;2inch offset vs 4inch offset
4)increasing spring rate on rt front and/or lt rear ( have been told to stay around 200# difference across the front and within 50# across the back)
Personally I have gone as much as 300# across the front without serious problems but... I have gone back to a 200# split

I also run tubes and have been running rt side pressures at 19# lt side pressures at 16# and have had very good luck with not losing tires. No bead locks either.
Hope this may help, good luck.

[This message has been edited by x factor (edited August 03, 2003).]

rico 08
Dirt Forum Champ
Total posts: 1139
posted August 03, 2003 09:17 AM  
5" front stagger is way too much,also i'd run the left front tire a little lower than the left rear,and run zero stagger on the rear for dry slick,stagger really hurts forward bite off the corner.

Dirt Maniac

Total posts: 193
posted August 03, 2003 03:25 PM  
Hey thanks for the info guys!

I changed both fronts & made them 86in LF & 87 RF. & straight up in the back.

I also put 2 new hyd. shocks in the back, since I had one old shock & one new gas shock.

The track was really wet last night since it rained in the morning before the race.. But the car responded well to the change!

I will still need to see what it will do on a dry slick. But I am sure my old car was so twisted & bent that I will not need to run the same setup.

thanks again!

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