Thread: spring weight

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i need rear coil over shocks this week ! i am building a 48 anglia full tube chassis. i need to know what rear coil over shock spring to use. they say i need to know the weight of the finished car. i say i understand , but i can not finish the car until i get the frame off the jig. and to do this i need to put the rear end under the chassis, to get it rolling on the floor. i thought of just putting straight tubing in for now but i also do not want to set the car up the wrong height in doing this. if anyone has or had a setup like this please let me know what you have used. thank you.

Put some tubing in where the coil overs will be installed, just set the tubing at the same height as the coil overs you will be running, for most rear coilovers you will find the length of the coilover at ride height is 14-15 inches, but check with the shop you are buying yours from. Also, any reputable shop would let you exchange springs if you got the wrong weight springs.

Originally posted by mooneye777
if anyone has or had a setup like this please let me know what you have used. thank you.

The shock company should be able to get you in the ballpark by factoring in the make/model/yr. - Fiberglass or steel or a combination of the two - fuel cell size - chassis type - etc. anything that will affect the overall weight of the car. Then if you buy adjustable shocks and mount them to adjustable mounts you will have some latitude in fine tuning the final ride height. It's not an exact science, but............

Already have some good advice from these guys but i'll just add that i agree with tech1 on the 150# springs. I have a tube chassis car with coil overs i'm building and i dont quite know the exact wieght of the car since it's no where near stock but i went with 150# springs as a starting point as have alot of other guys i know and the 150's will get you in the ball park ...so ta speak.

Plus if you do drop down to say 100# springs its alway good to have a couple sets of different rate springs to experiment at different tracks.

BG

thanks for the advice gentlemen, i am going to spring for the 150's and go from there. it will only be a small loss if it is wrong, compared to the final cost of the car 75 bucks is the least of my worries. but i do want the shocks and all mounts in place so i dont take a chance of getting something in the way of something else. the car is so small there is no room for guessing, thanks again.

Originally posted by mooneye777
thanks for the advice gentlemen, i am going to spring for the 150's and go from there. it will only be a small loss if it is wrong, compared to the final cost of the car 75 bucks is the least of my worries. but i do want the shocks and all mounts in place so i dont take a chance of getting something in the way of something else. the car is so small there is no room for guessing, thanks again.

I set my chassis up on the jig at the lowest possible ride height and then mounted the shocks fully extended off the bottom of the mounts. As you can see in this pic. the mounts are mounted about 2 holes too low just so I didn't have to compress the springs. That way everything is in place including coil springs and with the chassis at it's lowest ride height so I shouldn't have any interference problems. Just to be sure, if I have any doubt I have a block & tackle on the ceiling above the rear end. I unhook the shocks and then pull the rear end assembly through it's full travel (Actually further cuz' the shocks are unhooked) just to make sure there's no interference.

And yes those are billet aluminum parts .. But .. I made em' Meself' on the CNC machine, so that doesn't count as cookie cutter parts... Right?

Very nice CNC work you did there Pro

Just wondered,what housing is that your using?looks good!

BG

Originally posted by BlownGoat
Very nice CNC work you did there Pro

Just wondered,what housing is that your using?looks good!

BG

It's an Aerospace Components housing w/Mark Williams innards.

Pro - that's a sweet set-up there.