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LF Bump stop?
Not sure if anyone will share any info on it or not, but whats it do ? I see them a lot nowadays.
I would think its so you could run a softer spring to help get the Car to steer, but then not fall off a cliff if you get out of the Gas real quick but i never ran one to know.
Last edited by Kromulous; 03-21-2023 at 09:12 AM.
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![Quote](images/misc/quote_icon.png) Originally Posted by Kromulous
Not sure if anyone will share any info on it or not, but whats it do ? I see them a lot nowadays.
I would think its so you could run a softer spring to help get the Car to steer, but then not fall off a cliff if you get out of the Gas real quick but i never ran one to know.
It's about having two different rates and a reliable stopping point. Reasons can include wanting a soft spring to aid weight transfer upon acceleration, soft rate on initial turn-in as you suggested, or probably quite a few other uses. It can actually be easier to tune entry with one, IMO, especially where you slow a lot before entering the corner.
Modern Day Wedge Racing
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Soft spring to aid weight transfer upon acceleration. Hmm thats interesting, i need to study on that i guess.
I guess i need to get one on and start tinkering with it LOL.
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![Quote](images/misc/quote_icon.png) Originally Posted by Kromulous
Soft spring to aid weight transfer upon acceleration. Hmm thats interesting, i need to study on that i guess.
I guess i need to get one on and start tinkering with it LOL.
I'd say the weight transfer deal would not be a modern use. Back in the leaf and early 4 bar days, guys would run dual rate across the front to have a light rebound rate for maximum weight transfer. You could drag race like nobodies business. Entry was another story...
Modern Day Wedge Racing
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Back in 2018 i played a bit with 5" X11" springs 250-275# left front 225# RF on a chevelle clip modified.
had a bump stops on both front shocks.
at lawrenceburg it would coil bind the RF because of the waves, woop sections in the track.
I think there should be lifeguards in the genepool.
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![Quote](images/misc/quote_icon.png) Originally Posted by Kromulous
Soft spring to aid weight transfer upon acceleration. Hmm thats interesting, i need to study on that i guess.
I guess i need to get one on and start tinkering with it LOL.
It is still the same as the left rear, using a soft spring maintains more weight on the tire for the same amount of travel.
100# spring
600# load.
Unload 200#. Spring is 2 inches longer than at ride height.
600# spring
600# load
Unload 200#. Spring is .333 inches longer than at ride height.
For a given travel, softer spring maintains more load.
For a given unload, softer spring travels farther.
Raising the center of gravity is generally synonomous with weight transfer.
Last edited by 95shaw; 04-01-2023 at 07:14 PM.
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So your saying in simple terms that the LF Spring can retain some weight longer with the lighter spring, makes since.
A 275 and 225, thats crazy.
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after watchinq a few usmts races this year i think they might have the bump stops on the LF to act as litteral bump stops. a lot of them dropping pretty hard onto the LF on entry
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