Novak Conversions Jeep Wrangler TJ engine mounts

Post your side shot videos going over speed bumps at 15mph

TTB is still IFS. But TTB are an easy way to get suspension travel. On my design with a 12in shock, it will end up with nearly 18-20in of wheel travel. Compared to a double A-arm, its also way simpler. It has drawbacks compared to an A-arm setup, like camber cannot be controlled or tuned beyond where it is initially set.

True.

I guess my mental block was the center u-joint I remember in the Bronco. I'd assume you'd end up with a crazy angle there, but I guess you use a super high angle CV?
 
True.

I guess my mental block was the center u-joint I remember in the Bronco. I'd assume you'd end up with a crazy angle there, but I guess you use a super high angle CV?

Its kind of an interesting setup with the way you look at it. Though the wheels may get 18ish in of wheel travel, because the axle pinion is much closer to the pivot point, the pinion will only move a small fraction of it. I think I estimated about 6-7in of pinion travel from full compression to full droop on the setup I am designing.

On the axle shafts them selves from the pumpkin to the other “non drive” beam, I have not looked too much into it, but it sounds like RCV is the way to go for maximum travel and do some clearencing of the axle shaft opening on the “non driven” beam.
 
I want to see what’s the best suspension built on here for soaking up a high speed sharp impact. Both tires should hit the speed bump at same time. Measure height of speed bump. I’m thinking 20 mph (edited from 15) so we have a standard speed.

What I have in my mind for a perfect suspension is to hit a speed bump like this and have very little body motion and the axles move up through up travel without imparting a bunch of force to buck the body / cab. Not sure to what degree is possible. I’m still working on my suspension so I’m not ready to post my own video.

Any takers?

Is this what you are shooting for :) Notice the offset bumps on the road too.


Jokes aside, curious to see what you finally set yours up to do after the experimentation.
 
Its some dollars to do it right, but its fun watching the $500 TTB Fords run through the wringer at Silver Lake. I am slowly working on a design for a TTB in a TJ/LJ. Its purely CAD drawings now, but the models get more and more serious eventually it will happen and its feasible. There are a few TTB Jeeps out there.

View attachment 648271

Not sure if you've seen this guy's thread on comanche club, might be good for some inspiration.
https://comancheclub.com/topic/55967-comanche-fun-runner-ls3-ford-Dana 44-ttb-ifs-ax-15np242-built-ford-9%E2%80%99%E2%80%99/page/17/
 
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I want to see what’s the best suspension built on here for soaking up a high speed sharp impact. Both tires should hit the speed bump at same time. Measure height of speed bump. I’m thinking 20 mph (edited from 15) so we have a standard speed.

What I have in my mind for a perfect suspension is to hit a speed bump like this and have very little body motion and the axles move up through up travel without imparting a bunch of force to buck the body / cab. Not sure to what degree is possible. I’m still working on my suspension so I’m not ready to post my own video.

Any takers?

Forget about that 15 MPH sh!t.
If you're gonna do it, DO IT!

Seems the link is dead.
Maybe someone w/ an IG account can access it and repost.

It was worth watching.
 
VIDEO #1:

This was at 20mph, it was a pretty benign speed bump but its the first one i could get. Rears have DSCs fronts do not. Both Fox 2.0 COs.

You need to film in slow mo, not slow it down. It was very jerky and hard to see the movement. I slowed it down in YouTube and you couldn't see what was happening
 
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You need to film in slow mo, not slow it down. It was very jerky and hard to see the movement. I slowed it down in YouTube and you couldn't see what was happening

Noted. Next time i’ll try that. A 10 year old was running the camera… so you get what you pay for.
 
This might imply too much damping? It’s “springing” off the speed bump instead of soaking it up, or too much rebound damping ? Not sure. When I get front adjustability hopefully I can dial it in.
IMG_4525.png
 
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This might imply too much damping? It’s “springing” off the speed bump instead of soaking it up, or too much rebound damping ? Not sure. When I get front adjustability hopefully I can dial it in.
Start with tire pressure like Hosejockey says. Hard to see, but if the spring is compressing and rebounding with that force, it would be from insufficient rebound damping not too much.
 
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This might imply too much damping? It’s “springing” off the speed bump instead of soaking it up, or too much rebound damping ? Not sure. When I get front adjustability hopefully I can dial it in.View attachment 648660
either decrease the high speed compression damping or rebound damping or both? What adjustments do you have?
 
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Novak Conversions Jeep Wrangler TJ engine mounts