Tweet
I'm new to using these and the series I run basically only allow a 1/2 inch rubber. To clarify this is a modified are running but I thought I'd get better answers here. We went to a 400lb rf spring and driver said he couldn't get off the corner. We were running a 3-12 shock and I don't know if we need more rebound to stay into the bump or less with a softer spring. Does anyone have any starting recommendations with these?
-
-
More spring. We run a 600 rf. 1/2 material won’t do much. It’s a limiter not a typical bump stop. -
The first thing you need to know is whether or not you're getting on the bump at all in the first place. So you need a travel indicator for starters.Comment
-
Then, he could possibly lower the upper shock mount to use a bump like its meant to!Originally posted by Matt49 View PostComment
-
I agree it isn't much material but essentially shouldn't it work the same? According to the indicator we were on the bump but I guess my question is can you create more drive with rebound in the shock holding it in the bump?Comment
-
"Drive" as you describe it, is dynamic wedge. It comes from the LR pushing against the RF, or weight transfer from front to rear upon acceleration. Trying to hold the car on a really short bump is nearly impossible in practice and not how it works anyway.Originally posted by Havoc5 View PostComment
-
Or.. if you don’t like chopping up your frame and welding on new mounts.. you could add some packers!Originally posted by ZERO25 View PostComment
-
Race engineer- it won't allow me to quote but relating to your response how would it be any different from running a coil bind set up? Wouldn't the two work fairly similar but the bump obviously won't go completely solid? I could be wrong but I'm just trying to figure out how to utilize it betterComment
-
Yeah, that would only serve for overtravel safety, I see no way to get enough compliance from it.But someone may have figured a way to Make good use of it.Non coilover.....I got no clue what to do. Chuck it up in a crusher and see how much it increases load, based on travel the shock will see?Comment
-
1. Since your only allowed a 1/2" bumpstop, then you should be using an Apollo style bump and probably the 15 degree under washer (10 degree at least) to give it more compliance.
2. Assuming you had a 1/2 bump of some sort there before you softened the RF spring and it was at least at some point getting on it, then YES loosing drive off the corner is exactly what I'd expect. (also assuming you have the same 1/2" bump and packer/exposed shaft length)Last edited by billetbirdcage; 04-02-2019, 11:19 AM.Comment
-
He could get really slick with the lower mount and make one using the replaceable slugs, which would hide it from his competitors.Comment
-
add some turns to the right front jack screw and tune with that, works decent in a mod with a softer rf esp since youve got such a tie down shockComment
-
Billet explained much better than I. You can't generate load until you compress the bump if your spring is weak.Originally posted by Havoc5 View PostComment
-
Is there a point where a softer spring should end up creating more drive? Assuming it allows the car to get into the bump harder? My thinking is the bump would gain rate quickly which would tighten off the corner. Taking it to an extreme say I put a 200 in the rf it should fall into the bump to wedge up instead of relying on spring pressure. I could be way out in left field hereComment
-
say its a 5 lb spring with your bump, just because its laid over and looks cool doesnt make drive. youll hit that small bump so fast itll sheer traction on that small tireComment
Comment