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Author Topic:   bottoming out rf
Whitelightning
Dirt Freak

Total posts: 429
posted August 06, 2004 03:13 AM  
1200 on rf and seems to be bottoming out car handles great. should I have afco 1022 up there as well about 12 races on it. could the shock be bad or need stiffer spring, i just noticed it at differnt track I beed racing at latly same size just more bank carrying more speed upon entry. 3500# pure stock metric monte, no sway bars

Okie11m
Dirt Freak

Total posts: 287
posted August 06, 2004 05:47 AM  
Have you pulled the spring out & looked at it? It might have a coil bad. 1200 should be enuff.

marshalr
Dirt Maniac

Total posts: 148
posted August 06, 2004 04:35 PM  
The Shock has nothing to do with the bottoming condition unless it physically does not have enough travel.
You say it "seems" to be bottoming.
What kind of shock travel are you recording on the RF ?
How much wheel travel is available ?
A 1200 pound spring should be able to hold a lot of car. Assuming it is compressed an inch at ride height, then in the corner you compress it another 3", your car could almost be standing with the 3 other wheels off the ground with 3600 pounds or so working on the spring.

Whitelightning
Dirt Freak

Total posts: 429
posted August 06, 2004 09:33 PM  
i really have not even inspected it what should i look for. I mean I can bounce the front of the car and never seem to make it bottom out any where

akadirtracer7
Dirt Freak

Total posts: 217
posted August 07, 2004 01:03 AM  
make sure your shock is good if its lost its fluid it can't control the spring.When mine was bottoming out I put a heavier spring on the right front started with 800 rf and ended up at 1100. Also went with a heavier compression on the right front shock. The track is a med bank 9/16 that seem to work decent.

quietmans
Dirt Forum Racer

Total posts: 97
posted August 07, 2004 04:29 AM  
The only way to make sure is take the spring out,mark where the car bottoms out at on the shock.Put spring back in run it and see if it bottoms out to that mark.

hjff76
Dirt Roller

Total posts: 8
posted August 11, 2004 08:19 PM  
1200 is good in the rf. I would suggest somthing comparable to a pro 953 on the rear and 753 on the front. Sounds liek a shock problem


Dixon
Dirt Maniac

Total posts: 153
posted August 12, 2004 12:23 PM  
How banked is your track? I run at a real steep track, and everybody runs 1600-1800 on the rf.

Speedway65
Dirt Freak

Total posts: 344
posted August 12, 2004 01:03 PM  
We run a3/8 mile high banked with no sway bar and stock mount Pro shocks,we never have a problem with bottoming out.All of ours combined don't hardly add up to some of your guys RF!

Lf-800 rf-900
lr-225 RR-200

[This message has been edited by Speedway65 (edited August 12, 2004).]

Whitelightning
Dirt Freak

Total posts: 429
posted August 17, 2004 02:40 AM  
Hey all car seems to be dipping rf still, thinking of going to a 1400 and 1200 on lf . its a 1/2 mile high bank and a 3500 pond car

BrianW
Dirt Freak

Total posts: 385
posted August 17, 2004 11:01 AM  
Check for marks where the A-Arm is bottoming out - also put a tye-wrap around the shock shaft to see how much movement that you're getting - about 1.5-2" of shock travel in stock location should be plenty. If the shock has been bottomed it could be blown and not able to control the motion of the spring - the car will feel like the RF is bouncing or oscilating way too much - for that much spring you need a really stiff shock to control harmonics.

Also if you can I've found it a help to run a sway-bar on a street stock - a set of poly bushings can help with a softer spring up front and the sway bar can be used to jack weight around a little bit when weight jacks aren't allowed in the class by putting all-thread as the end-line mount and a pair of jam nuts you can dial in/out weight on the RF/LF tires...

Also - what does the car scale at? Too much front weight will cause excessive force on the RF tire.

    

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