Guest ON3GO Posted August 22, 2003 Share Posted August 22, 2003 hey guys.. i have the MSA bumpsteer spacers for my Z. now i only have them for the front, do i need them for the rear too? and sense they go below the struts it raises them up abit, now do i still need the bump stop? mike Quote Link to comment Share on other sites More sharing options...
BRAD D Posted August 22, 2003 Share Posted August 22, 2003 bumpsteer spacers stop your steering wheel from truning when your car is lowered and you hit bumps, so no you dont need them in the rear because you dont have 4 wheel steering And yes you will still need your bump stops. Did you get the CCW's yet? Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted August 22, 2003 Share Posted August 22, 2003 not yet, u will be the 1st person i send pics too. but with them only in the front doesnt it make the front sit higher? Quote Link to comment Share on other sites More sharing options...
BRAD D Posted August 22, 2003 Share Posted August 22, 2003 I dont have them, but it should just move the controll arm down and the spindle that holds the wheel will be in the same spot. Quote Link to comment Share on other sites More sharing options...
Guest ON3GO Posted August 22, 2003 Share Posted August 22, 2003 well ill post pics later today or tomorrow and show ya.. im sure your right im just lost lol. Quote Link to comment Share on other sites More sharing options...
BRAD D Posted August 22, 2003 Share Posted August 22, 2003 Think of it this way is some thing is on top of the spring / strut it will lift the car. And if some thing goes under the strut (ie.your bump steer spacers) the controll arm will just be lower Quote Link to comment Share on other sites More sharing options...
Forrest Posted August 22, 2003 Share Posted August 22, 2003 bumpsteer spacers stop your steering wheel from truning when your car is lowered and you hit bumps' date=' so no you dont need them in the rear because you dont have 4 wheel steering And yes you will still need your bump stops. Did you get the CCW's yet? [/quote'] If they were really bump steer spacers, that is what they would do, but they actually don't reduce bump steer at all - they correct your camber curve. To correct for bumpsteer you have to change the pivot point on your crossmember. This page should answer all your questions: http://www.reactionresearch.com/suspension.htm Quote Link to comment Share on other sites More sharing options...
Guest tom sixbey Posted August 22, 2003 Share Posted August 22, 2003 do the 2nd generation cars (79-83) have similar bump-steer issues? - i'd like to know this as i'm lowering mine right now (only 1.5")... Quote Link to comment Share on other sites More sharing options...
auxilary Posted August 23, 2003 Share Posted August 23, 2003 any time where your control arm pivot geometry doesn't match your tie rod geometry travel, bumpsteer (major or minor) is produced. Quote Link to comment Share on other sites More sharing options...
Guest tom sixbey Posted August 23, 2003 Share Posted August 23, 2003 thanks, aux - that makes sense... - are there bump steer spacers for the 280zx? Quote Link to comment Share on other sites More sharing options...
Guest BigWhyteDude Posted August 23, 2003 Share Posted August 23, 2003 you know ive read about it on here, and in the JTR manual but i still dont fully comprehend what bump steer is. Can someone clearify this issue for me. I feal dumb because i have read the JTR manual like 3 times already. Quote Link to comment Share on other sites More sharing options...
j260z Posted August 23, 2003 Share Posted August 23, 2003 check out this site http://240z.jeromio.com/frontcross.html Quote Link to comment Share on other sites More sharing options...
JMortensen Posted August 23, 2003 Share Posted August 23, 2003 Don't assume that because 3/4" up and 1/2" out works for someone else's car that it will work for yours. Chances are they never checked it either. If you want to check bump steer you need a gauge. If you don't want to buy a gauge you can use 2 dial indicators and make your own mount. I fixed my bumpsteer by drilling a hole directly above the stock hole as high as I could on the crossmember, then cutting a slot between the two holes. I then used a gauge and kept raising the pivot until I got it done. My pivot moved approx 1/2" up. I didn't move out, because I am using adj control arms and figured that I could lengthen the control arm instead. Bump steer is something that has to be measured and changed precisely. I hate seeing people drill the hole x amount up and x amount out. You'll probably make it better, but it won't be right. BTW I've had my setup on the track and auto-xing many times in the last 6 years with slicks and never had a problem with the control arms moving. If you can slot a rear 510 or ZX crossmember, you can slot a front one too. Jon Quote Link to comment Share on other sites More sharing options...
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