Improved Porsche 911 Camber Adjuster & Ride Height Torsion Bar Indexing

[@iancarpenter2334]

Tom, on a 911 rear t bar , one spline clockwise inner and outer one counter yields about .250" This is true for either more ride height or less . well done on the mod , as always you are rocking it . Ian

[@GarageTimeAutoResto]

Good to know. Not sure why the Elephant racing racing calculator didn't work for me other than my weight was way off. Your numbers are more useful as I increment down. Thanks!

[@rodgraff1782]

There’s supposed to be two eccentric bolts on the stock setup. One for camber and one for toe, so you don’t have to manually pull back and forth, which would be hard to get the fine adjustment. Elephant racings camber max is like what you fabricated, but doesn’t weld on. It has a hole for the bolt. I like the idea of having no empty bolt holes. I use their quick change adjustable spring plates, and hollow torsion bars, along with aluminum trailing arms to save weight in the rear. You need adjustable spring plates to make ride height adjustments and corner balancing easy. With mine, I can change torsion bars by just jacking up the side of the car, removing a snap ring and pulling the bar out. (It’s threaded for a handle)

[@GarageTimeAutoResto]

This all correct. However my plan is to goto coil-overs and adjustable pivot points. My inner mounts are also adjustable.

[@rodgraff1782]

@@GarageTimeAutoResto I am curious about the reason you want to go with coil overs on such a light car. Do you plan on racing it?

[@GarageTimeAutoResto]

No serious racing. For me its more about the adjustability and keeping the forces all in line. When the spring and dampening forces are far apart it loads the suspension pivots in wierd ways.

[@rodgraff1782]

@@GarageTimeAutoResto I agree. I hope I am ok with all the mods I did. At least my rear shocks are the canister type, and are triple adjustable. My fronts are Fox racing shocks, that are a complete strut, with canisters. They have adjustable height spindles, so I lowered the front height about 3/4” just enough to clear the wheels. There is also an adjustment knob on the canisters. It is a little stiff in the front because I am pretty light up there. Are you going to have to cut our your rear shock tubes, and enlarge them, to accommodate the coil overs?

[@GarageTimeAutoResto]

Very cool on the triple adjustables! I think coilovers will fit a long wheel base car in the rear,but you have to use long spring perches so the coil doesn't go up inside the chassis. Time will tell. I'm just trying to get the car back on the road in mostly stock configuration.

[@cam3002]

This modifications appears to be a really good idea. Looking forward to seeing the results when adjusting the front pivot point on the real control arms.

[@GarageTimeAutoResto]

Thx, I hope to play around this quite a bit while I try different setups. Like you said there are the inner pivots to play with too.

[@smplyizzy]

I agree that is a very nice saw.

[@GarageTimeAutoResto]

Yep, do you have one also?

[@daos3300]

torsion bars the same as type 3. very nice system. you may develop cracks in the spring plate around the weld.

[@GarageTimeAutoResto]

Yes, it's possible that the spring plate is weakened some due to welding. My hunch is that these plates are very over designed to begin with. I'll will keep my eye on them though.

[@daos3300]

@@GarageTimeAutoResto well hopefully no cracks, it's a nice mod.

[@grantroberts4231]

cool mod. have been eager for you to get to suspension stuff cuz i’m about to hafta overhaul mine.

[@GarageTimeAutoResto]

More goodies to come regarding cool suspension parts. Are you changing bars and bushings?

[@grantroberts4231]

Garage Time - Restomod i am. i think my torsion bar bushings are shot. how do you get those out? burn ‘em?

[@GarageTimeAutoResto]

I think so, heat up and twist off. I haven't played with new bushings which I'm sure are harder to work with than my old junk. Personally I'm going with the rebel racing rear Teflon bushings. I want to to do a drive comparison between the two.

[@polloloci21]

That’s some nice welding

[@GarageTimeAutoResto]

Thx👍

[@Truffel12]

I really hope you are able to do some comparison testing between 912 vs 911 setup, and torsion bars vs coil overs. The results would be interesting! Keep up the great work 👍

[@GarageTimeAutoResto]

I hope to👍. What would you be interested in? Over/understeer characteristics? Ride stiffness? Overall feel? Give me some ideas and I'll try to setup those tests. My hope is to have a 911 engine ready to drop in when the time comes. This means I can do tests back to back within a week or so after the engine swap.

[@damonbaggs3296]

Thanks for showing that. That is a really functional (and yet simple) modification. As far as ride height... How heavy is it right now? . Probably like 1200lbs or so, it's not gonna sit at the "planned" ride height until you fatten her up. I'm loving the daily (short) vids. Thank you

[@GarageTimeAutoResto]

Yeah, I must have the weight wrong. No glass, doors, decklid, but I thought it would have sit a bit lower than it does now.

[@philhobson3068]

I’m curious about your comment that the torsion bar will be stiffer with less weight. Since the spring rate is non linear, won’t it be less stiff?

[@GarageTimeAutoResto]

Sorry for the confusion. I meant that a 912 will feel stiffer in the rear than a 911. Given the spring rates are the same and the 912 is lighter. Suspension deflection is weight divided by spring rate. More weight equals more deflection. Why are you saying the spring rate is non linear? Arm geometry?

[@enrique-bz7cy]

Spring rates are linear no matter what type of spring, F(force) = k(spring rate) * x (displacement). A lighter car feels stiffer on the same level of spring because mass has a damping effect. Less damping = springs bounce around however they want. That’s why cars with blown shock absorbers go pitter-pattering down the road too.

[@GarageTimeAutoResto]

This is the right track. Mass changes the bouncing frequency but is not a dampener. A dampener will reduce the bounce amplitude. I agree that most springs are linear especially torsion bars. There are some progressive coil springs though.

[@enrique-bz7cy]

Garage Time - Restomod True. I was trying to speak in layman’s terms but yeah lol the critical difference between k, c, and m (stiffness, damping, and mass) is that they exert force on the system based on displacement, velocity, and acceleration respectively. So mass isn’t actually a damper at all but I’m just used to telling people it has a damping effect lol. And yeah I have heard of some nonlinear springs but that stuff sounds complicated

[@enrique-bz7cy]

Garage Time - Restomod also can’t wait to use the knowledge from these vids to restore my 240!

[@dra911]

So, are you using either of the eccentric adjustment bolts at all in this modification, or are you just using normal M12 bolts?

[@GarageTimeAutoResto]

Just regular bolts. The camber adjuster worked well, but all adjustments were done without vehicle weight on them.

[@dra911]

@@GarageTimeAutoResto Cool, thanks!

[@rodneynelson3862]

Awesome how to video. I was wondering how that eccentric bolt worked, now I know. It does seem ridiculous to buy adjustable spring plates when you can make them yourself. I just may do this. Thanks Tom!

[@GarageTimeAutoResto]

My plates don't have the adjusters for ride height like some of the later factory plates or sway-a-way. Coilovers will make ride height adjustment easier once I get all the parts. There is also an eccentric for toe, but I may leave this out.

[@rodgraff1782]

This is not what adjustable spring plates are. This is just an easier way to adjust camber, not ride height. Elephant racing makes the camber max, which is similar to this, but no welding is necessary, as it is held on by the bolt.

[@Rckhlld1]

Water will get in between the metal and rust it !! I’d weld all the way round

[@GarageTimeAutoResto]

Good Point. It will get a little dicey near the threads! The truth is I may need to cut the height down a little on the inside. It's a bit closer to the arm than I thought. I want a big range of adjustment, so we'll see. This arm will be removed many more times I'm sure.

[@Rckhlld1]

Garage Time - Restomod I just knew there’d be a good reason 😂 great restoration project 👍