front bump stops

[GregFoutz]

We have a kit for the Gen 3 that uses the stock lower arm and you can add bump stop. installing on my Gen 3 the end of this week and then we will release for sale. looks very much like our Gen 2 kit we just rolled out.

https://www.foutzmotorsports.com/co...kit-for-stock-lower-arm-2017-2020-f150-raptor

Let me know if you have any questions or anything.

 

[taquitos]

We have a kit for the Gen 3 that uses the stock lower arm and you can add bump stop. installing on my Gen 3 the end of this week and then we will release for sale. looks very much like our Gen 2 kit we just rolled out.

https://www.foutzmotorsports.com/co...kit-for-stock-lower-arm-2017-2020-f150-raptor

Let me know if you have any questions or anything.

I’ve got a question about rear bumps. Everyone seems to have kits that are for both 37 and 35. My impression was that the travel difference was from the bump stop on the 35 essentially sitting 1” further from the axle than the 37. With bump stop kits do the 35s lose wheel travel or is my assumption about layout wrong?

 

[GregFoutz]

I’ve got a question about rear bumps. Everyone seems to have kits that are for both 37 and 35. My impression was that the travel difference was from the bump stop on the 35 essentially sitting 1” further from the axle than the 37. With bump stop kits do the 35s lose wheel travel or is my assumption about layout wrong?

The factory setup on the trucks with 37" tires do remove about 1" of wheel travel on the up stroke. The shocks are limited to stop a little earlier to try and keep the tire out of the fender... We made the bump stop kit work based on the 35" trucks so it just doesn't use the last little bit of travel on a true 37" truck.

 

[taquitos]

The factory setup on the trucks with 37" tires do remove about 1" of wheel travel on the up stroke. The shocks are limited to stop a little earlier to try and keep the tire out of the fender... We made the bump stop kit work based on the 35" trucks so it just doesn't use the last little bit of travel on a true 37" truck.

The bump stop doesn’t use the last bit of its travel?

 

[GregFoutz]

The bump stop doesn’t use the last bit of its travel?

the bump stop is timed to work with the 35" tire truck which has a little more up travel. if you put the same bump stop kit on a 37" tire truck and the shocks stop the up travel earlier than the 35" tire truck then the bump stop never travels 100%.

 

[taquitos]

the bump stop is timed to work with the 35" tire truck which has a little more up travel. if you put the same bump stop kit on a 37" tire truck and the shocks stop the up travel earlier than the 35" tire truck then the bump stop never travels 100%.

Seems like that’s risking it for the biscuit. Although I have no idea of the shock bodies are designed to handle bottom out or not. I have a 35 so all the better for me. Thanks for the answers.

 

[catinthehat85]

the bump stop is timed to work with the 35" tire truck which has a little more up travel. if you put the same bump stop kit on a 37" tire truck and the shocks stop the up travel earlier than the 35" tire truck then the bump stop never travels 100%.

My RPG bumps do the same, I can tell by inspecting the shaft after hard runs. Not thrilled but it is what it is. For me at least it’s a temporary solution lol.

 

[GregFoutz]

My RPG bumps do the same, I can tell by inspecting the shaft after hard runs. Not thrilled but it is what it is. For me at least it’s a temporary solution lol.

its really a pretty easy fix if you are super concerned about it. add some material to the axle bump pad to raise the height there and you can get it to match perfect if needed. Just add to the top of the existing plate. Could cut a piece of aluminum the correct height to compensate and bolt it to the pad pretty easy.

 

[avyraptor23]

its really a pretty easy fix if you are super concerned about it. add some material to the axle bump pad to raise the height there and you can get it to match perfect if needed. Just add to the top of the existing plate. Could cut a piece of aluminum the correct height to compensate and bolt it to the pad pretty easy.

do you have any idea what that added material thickness would need to be for 37s?

 

[GregFoutz]

do you have any idea what that added material thickness would need to be for 37s?

the 37" truck to the 35" truck is supposed to have a 1" difference at bump zone. First thing I would do is put a small width zip tie on the bump stop and go drive it aggressively where you think you have bottomed it out completely and see if you have exposed shaft left on the bump stop. make sure its doing what you think its doing. Then depending on how much shaft isn't getting pushed in to the bump body that's the amount to add. I would guess it will be about .875". But I would check it on your truck to make sure. At the same time put a zip tie on the rear shock shafts too and make sure they show fully bottomed out before you change anything. if the shock is totally bottomed out and you have shaft left on the bump stop then adding some to the base plate is the right thing to do. Feel free to reach out if you need help with that. or reply back with questions so the other guys on the forum can see everything. It may help someone else too.