Bump Stop Question

bigbizznass · 05-07-2006, 07:13 PM

I just bought some eibach sportline's for my Si and was debating on whether or not to cut the bump stop like it says to in the instructions. I also have 18" wheels with 40 wide tires. I know in the step by step, they didn't, so i was wondering is it completly necessary if im not going to be whipping around a 90* turn at 75mph.

honda93 · 05-08-2006, 10:44 AM

Cut it down (even if you take a 1/3 ~ 1/2 off it). Though you may not be autocrossing, you may hit a bump mid-corner that would cause you to hit the bumpstop.

Here's why...

My guess is that Honda has a progressive bumpstop (so the resulting story won't be as severe), but in the old days, they were not progressive and hitting them would be the equivalent of making the spring rate infinite... In other words immediate and extreme understeer or oversteer. I was co-driving a Camaro at an autocross once when I had this happen to me. I asked the owner what happened and he said we hit the bumpstop.

CarbonLimited · 05-08-2006, 11:30 AM

cut the bump stop, it wont hurt

kenchan · 05-08-2006, 11:06 PM

almost alwasy cut the bumpstop unless it specifically tells you not to cut it.

also, check out koni's progressive rate bumpstops for those that are
riding very low with limited sus stroke.

05-07-2006, 07:13 PM	#1 (permalink)
bigbizznass Junior Member Join Date: May 2006 Posts: 4 iTrader: 0 / 0%	Bump Stop Question I just bought some eibach sportline's for my Si and was debating on whether or not to cut the bump stop like it says to in the instructions. I also have 18" wheels with 40 wide tires. I know in the step by step, they didn't, so i was wondering is it completly necessary if im not going to be whipping around a 90* turn at 75mph.

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05-08-2006, 10:44 AM	#2 (permalink)
honda93 Senior Member Join Date: Oct 2005 Location: Property Tax Hell... NJ Age: 34 Posts: 906 iTrader: 2 / 100%	Cut it down (even if you take a 1/3 ~ 1/2 off it). Though you may not be autocrossing, you may hit a bump mid-corner that would cause you to hit the bumpstop. Here's why... My guess is that Honda has a progressive bumpstop (so the resulting story won't be as severe), but in the old days, they were not progressive and hitting them would be the equivalent of making the spring rate infinite... In other words immediate and extreme understeer or oversteer. I was co-driving a Camaro at an autocross once when I had this happen to me. I asked the owner what happened and he said we hit the bumpstop.

05-08-2006, 11:30 AM	#3 (permalink)
CarbonLimited Senior Member Join Date: Apr 2006 Location: Minnesota Age: 26 Posts: 280 iTrader: 0 / 0%	cut the bump stop, it wont hurt

05-08-2006, 11:06 PM	#4 (permalink)
kenchan Senior Member Join Date: Apr 2006 Location: Midwest Posts: 2,402 iTrader: 1 / 100%	almost alwasy cut the bumpstop unless it specifically tells you not to cut it. also, check out koni's progressive rate bumpstops for those that are riding very low with limited sus stroke.