STACK vs BUMP !!!!!

[Dirtwizard]

Yes , and thats the million dollar question

[Moreland24]

Yes and no. You get on the heavy spring at a different point so somewhere between ride height and fully down on the rf there will be some difference. When the car is on the rf, it should basically be the same.

If total travel is the same, dynamic wedge will be the same at that point.

Ahhhh, ok I see...

[29racin]

what i s recommended spring rates to use on 2 stage set-up. now i use a 400 or 375. this will also help on throttle corner entry?

[cushionbumper]

@poppy, check you PM
CB

[cushionbumper]

poppy, check your pm.

[throwindirt1]

we currently run a 375 on rf and would like to try the stacked spring setup, what springs would we need to replace the 375?

[big88fan]

Well for those who have always said the bump stop setup doesn't work I now have to totally disagree with you my car handled the best it ever has and on a tacky rough and super slick track it was awesome so those of you still searching for an advantage keep looking.

[fastford]

you tell them big88, ive said 0n here bef0re th0se bad m0uthing the bump st0p d0nt kn0w h0w t0 use it

[F22 RAPTOR]

I never said the bump couldn't or didn't work, but I did say it was unnecessarily harsh and can be difficult to get right. It also breaks a lot of stuff and can result in a roll over and totaling the car, but hey if you guys like it and don't mind getting on your lid, have at it. It is slightly better than coil binding, which is stupid. A bump, at least, is just a small rubber spring. To each his own.

[01racing]

do you need to run alot of rebound with the stack ?

[MasterSbilt_Racer]

do you need to run alot of rebound with the stack ?

Yes you do.

[big88fan]

I don't see how it can break stuff at least with the bump stop we run they are over 4" long. Running alot of rebound seems like a bad idea unless the track was as smooth as glass everytime you go over a bump it would keep the tire from making full contact with the track.

[F22 RAPTOR]

I don't see how it can break stuff at least with the bump stop we run they are over 4" long. Running alot of rebound seems like a bad idea unless the track was as smooth as glass everytime you go over a bump it would keep the tire from making full contact with the track.

Thats my point, to make it really go, it needs to be tied down and so you end up with not much travel. You find a hole or a rutt the wrong way and all that energy is driven into the chassis and suspension components. Look if you like it and it works for you thats great, but I have my opinion and you have yours, thats all. Bump is way better than coil bind, I'm just not a fan of either.

[fastford]

i use a bump stop that is 3in long, at a height of 1 1/4 in it has 1400 psi and can compress a little further however it never does, i cant see this being any harsher on equipment than a stacked setup useing the common 700 lb primary spring which means once it hits she spanner it would have to travel 2 inches to reach the 1400lb mark, as apposed to 1 3/4in on the bump, not really much difference. this is my personal assessment the bumpstop is the simplest way to try the lastest craze of the soft right front if your track is slick and smooth, this is when i prefer bump over the stacked, however on a rough and heavy track, i feel the stack has a slight edge in that it want disrupt the car as much but is a moderate amount harder to tune. as far as rt fr rebound on the bump, i start with 50psi gas in shock and 60 percent rebound if the car has a slight throttle push when i pick up the throttle, i start increasing rebound, if it has a bad push then theres a lot of options,decrease wedge,raise lower left bar, trail lf rear which idont like,and list goes on and on ,i hope this helps some

[MasterSbilt_Racer]

At what point does a bump stop become a rubber spring?