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Old 02-10-2012, 12:50 AM   #1
Foose04
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Join Date: Feb 2010
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Default Custom Drag Springs

Plan to make some changes on the front end this year. Current setup is pretty horrible for 1/4 fun. 2inch lowering springs that are netting more around 3", just touching the bump stops. The front is very stiff, both pushing down and has almost zero recoil coming up. Struts are lakewood 90/10s.

Currently i'm looking at DJM lowering arms with two inch drop. Should save some weight and switch to a stock spring. I read the v6 springs have a longer coil, so I bought a used set figuring they may hold more energy when compressed.

However this got me thinking what about custom springs. I could then even go with 3-4 drop arms and install a longer spring that stores more energy but keeps the drop at 2". Thoughts?

Also read that trucks leave best if it they start level. It's currently at least 2-3" ass high. That also needs to be addressed. I'm thinking lowering shackles for that, the current slicks will tuck and I can use my load bags to bring it back up on the street. I'm getting about 4" lift in the rear so the Caltrac bars are doing there part putting weight on the axle.


Currently how the truck leaves with a 1.54, also got a 1.52 that day. Best is a few 1.51s.





Got a lot of info from a cal-trac thread over on YB. This guy seems like the only truck guy I can relate to. Runs Cals and multi-leafs. Was having problems with spinning before the 60 is up and unloading the rear. (same as me) He's leaving with turbo and trans brake at around 3500. Ass High and 3-4 inch of front end travel.




Update late on he says he got his shit level and some movement up front.

1.37x 60"

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12 GMC Denali HD: 4x4, 12" Bullet Proof, 24x12 American Forces, 40x15.50 Toyo M/T's, h&s mini max, deleted, 5" axle dump, S&B intake,tractions bars, air bags.
04 GMC 1500RST: TMS Iron 347/S480/4l80E - 9.63@143.22
05 GMC 2500HD: LLY@372HP/669TQ, 4x4, 8" FabTech, 4.56 gears & 37" Toyo M/T's
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