Visit The Dirt Forum for More Information

Author Topic:   RF bottomed out
GRTWallbanger
Dirt Maniac

Total posts: 196
posted May 24, 2005 08:11 AM  
If the RF is always bottomed out on our 4-bar car.(SPring in front clamped)but it is bottomed with spring behind also.What would be the best fix.A heavier RF spring?Pair of 800 in there now(Metric front)

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 24, 2005 08:49 AM  
your way to light on the front end.... you'll want to up both sides by at least 100 if not 150-200 pounds. The motion ratio of the lower a arms is different than the impala, chevelle stubs.

donslink1
Dirt Freak

Total posts: 318
posted May 24, 2005 09:58 AM  
we run metric stub and we run a 650 on the rf
its a 4-bar car and the spring is clamped in front.

Xtreme12x
Dirt Forum Champ
Total posts: 874
posted May 24, 2005 10:23 AM  
What shock are you running on the right front?

If anything, increase the shock rate to start, go from a 74 up to a 76 or even a 77 to slow down the transfer. I have never heard of anyone running under a 850 on a metric stub and not bottoming it out.

wfoondirt
Dirt Forum Champ
Total posts: 505
posted May 24, 2005 11:02 AM  
With nova lowers maybe.

GRTWallbanger
Dirt Maniac

Total posts: 196
posted May 24, 2005 11:59 AM  
Running stright 5 vavles on teh front.If i up the RF spring I am afraid of the car getting tight??Would it be better to up both of them?
Hey Donslink1, Doesnt that Pierce car have nova lowers?I have never run the RF heavier then the LF, what will it do?I will keep the wheel weights the same.Lf is about 100lbs heavier then RF.

donslink1
Dirt Freak

Total posts: 318
posted May 24, 2005 12:19 PM  
yes we run nova lowers, but I know of guys running 500# spring with the nova lowers that is. and we some times bottom ours out, but Bob dont seem worried about it.
If Bobs not worried, Im not worried!!

dirtslinger66
Dirt Maniac

Total posts: 200
posted May 24, 2005 09:02 PM  
Same here metric with nova lowers and 750 left and 650 right and I have always got about an 1 1/2" of travel left has never bottomed out yet.

aggressive
Dirt Full Roller

Total posts: 33
posted May 25, 2005 05:43 AM  
The reason the Pierce cars can get so light on R.F.springs is the roll center is moved way over to the right,R.F.A-frame almost 30 degrees of angle,L.F.a-frame almost flat,extended ball joints they are real similar to most late model front ends as to where the role center is located

FlyNLoIMCA17
Dirt Forum Champ
Total posts: 753
posted May 25, 2005 09:40 PM  
I have had 2 metric mods. My old car (metric) I ran 550lbs springs on both the fronts with 75 shocks. I didn't have Nova lowers, just the factory metrics. The car never did bottom out. I ran about 4 different tracks regularly with it and it ran in the top 5 or 3 wherever we went.

My current car is also a metric with factory metric lowers also. I started it with 750RF 700LF and it was bottoming out the RF. So now I have 850LF 800RF. My current car is a 4-bar but the car that ran the 550's was a 3-link.

Back to the Archives