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Post by newracerguy on Apr 7, 2014 18:17:33 GMT -6
we just got a new class that races stock trucks. its a shortbox chevy. can anybody give me any ideas of a very basic setup? scale weights. front spring weights? the truck is going to be about 3800 lbs. with stock motor. any help would be greatly appreciated! |
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Post by flipflopoo1oo on Apr 8, 2014 5:06:22 GMT -6
The only trucks I help build were a stock parts build! The same things apply in variations of springs and shocks per weight and transfer! A chop of the springs differently to get ride heights and compressions of springs, and excessive negative caster put us in the top three quickly! Removing or chopping the rear of the leafs or spinning a leaf to chop closer at various points can make them hook like traction bars! The left rear and right front is stronger on my setup and it has won for us always in 35 years, in lots of classes! Check out all my post in every class to see how this works! We ran leaf classes for 3 years starting out and won 60+ races in three years and 7 big early and end of season races! A 3150 lb. Nova car with a 1100-1300 ft. and a 250-225 rear. A little stiff on ours but should be close if you add weight to get rear percent up! shocks were a 7 lt. ft. and 5 rt. ft. and 6s on both the rear! All single valves to do what is needed on purpose! Shocks have to match weight too! A bit lighter will react faster with heavy springs to slow them down! 3 stock shocks and one three for the rt. ft. works too!
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Post by Krooser on Apr 9, 2014 15:00:12 GMT -6
You can check your home built leaf springs by laying them upside down on a smooth surface (I used a piece of steel or sheet metal) and lube the spring eyes so they slide easily on the surface.
Then find a chunk of steel, lead, crew member… whatever that is a known weight (100#'s makes it easy). Measure from the top of the inverted spring to the ground… then put the weight on the top of the spring and measure how much the spring has compressed… do the math to figure out what rate the spring is. If the spring takes 200#'s to move one inch it's a 200# spring.
200-225 would be a good starting spot on the LR… 200# on the RR. KYB shocks seem to be popular around here with pure stocks. The Malibu I have came with three of them on the car...
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Post by flipflopoo1oo on Aug 3, 2014 8:40:16 GMT -6
If the rules allow, a drop of a half inch in the left rear, ft. mounting location will insure the left rear hooks before the right even when rolled as long as the rear hangers are the same! This is on a left leaned car where the chassis stays level and not nosed hard and twisted when rolled! A slotted right side ft. location of a half inch can give needed steer in both directions! Closing when on or opening when off the throttle or during braking to ease side bind and speed up the corners in getting in with a tighter car and straighter off by not staying open to over steer! Driving under or keeping the bottom line faster is now easier!
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