Author Topic: Bump Stop Question (Read 1412 times)

blackdiamond · « **on:** Sep 06, 2005, 11:58:25 AM »

My 85 pickup has 4.5 inch Superlift Springs with 33x12.50x15 BFG Mud KM on 15x10 inch wheels. I am not quite ready to cut the firewall for clearance, I might do that in the future for 35's, but I need to bump stop the front. This weekend I hit the firewall hard enough to stop the truck, it does fine with the wheels straight, but when turned it hits hard.

Any suggestions? What size bump stops should I get?

brainlessfool · « **Reply #1 on:** Sep 06, 2005, 01:14:47 PM »

I think the rule of thumb is that the springs should not go into neg. flex. so if you put on a bump stop that stops it just as it gets "flat" you should be fine.

blackdiamond · « **Reply #2 on:** Sep 06, 2005, 01:53:44 PM »

I think Alcans are good for some negative flex, but point taken. I'm not sure my springs go negative, but they do contact the firewall at full compression.

Author Topic: Bump Stop Question (Read 1412 times)

blackdiamond

Bump Stop Question

brainlessfool

Re: Bump Stop Question

blackdiamond [OP]

Re: Bump Stop Question

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	Author Topic: Bump Stop Question (Read 1412 times) 0 Members and 1 Guest are viewing this topic. blackdiamond Gold Turtle Award Turtle Points: 1174 Posts: 5,057 Member since Dec '03 Crawlin with Marlin Bump Stop Question « on: Sep 06, 2005, 11:58:25 AM » My 85 pickup has 4.5 inch Superlift Springs with 33x12.50x15 BFG Mud KM on 15x10 inch wheels. I am not quite ready to cut the firewall for clearance, I might do that in the future for 35's, but I need to bump stop the front. This weekend I hit the firewall hard enough to stop the truck, it does fine with the wheels straight, but when turned it hits hard. Any suggestions? What size bump stops should I get? Logged 1989 4Runner: Dual Ultimate (Inchworm front & Marlin 4.70 rear), Marlin Twin Stick, 1200-lb clutch, 4.88 R&P, Aussie Front, Detroit rear, 30-spline Longs, Long hub gears, ARP hub and knuckle studs & 35x12.50 Cooper STT PRO tires. Marlin rear bumper & sliders. FROR front bumper. SAS with Alcan springs & Rancho 9000XL shocks. Budbuilt Bolt-on traction bar. Custom Interior Cage by Those Guys Rod and Customs. Moab Tested & Rubicon Approved brainlessfool It's not my problem if you can't hear the voices too. Gold Turtle Award Turtle Points: 2730 Posts: 4,207 Member since Jun '02 drive fast or the devil may get ya Re: Bump Stop Question « Reply #1 on: Sep 06, 2005, 01:14:47 PM » I think the rule of thumb is that the springs should not go into neg. flex. so if you put on a bump stop that stops it just as it gets "flat" you should be fine. Logged A good day working, that's just sick blackdiamond [OP] Gold Turtle Award Turtle Points: 1174 Posts: 5,057 Member since Dec '03 Crawlin with Marlin Re: Bump Stop Question « Reply #2 on: Sep 06, 2005, 01:53:44 PM » I think Alcans are good for some negative flex, but point taken. I'm not sure my springs go negative, but they do contact the firewall at full compression. Logged 1989 4Runner: Dual Ultimate (Inchworm front & Marlin 4.70 rear), Marlin Twin Stick, 1200-lb clutch, 4.88 R&P, Aussie Front, Detroit rear, 30-spline Longs, Long hub gears, ARP hub and knuckle studs & 35x12.50 Cooper STT PRO tires. Marlin rear bumper & sliders. FROR front bumper. SAS with Alcan springs & Rancho 9000XL shocks. Budbuilt Bolt-on traction bar. Custom Interior Cage by Those Guys Rod and Customs. Moab Tested & Rubicon Approved