Hi Guys,
Thought some pics of our new Rear Uprights mounted on a chassis would show what we're aiming at with these parts. They weigh the same as the cast aluminum/steel mounting blocks bolted together assembly while being much stronger and improved cooling for the brakes and wheel bearings.
Like the new Front Uprights, these parts are intended for the "100 Series" cars made by or with parts from the original Cape Advanced Vehicles. Owners of post 100 s/n cars already have upgrades from Autofutura so these parts aren't applicable.
The new Rear Uprights optimize the rear suspension geometry in several areas: Camber climb, Roll stiffness, Coil/Over Shock travel, and work in conjunction with our Revised Lower Control Arms to give adjustable Toe-in and elimination of all binding from the rubber bushings replaced with Aurora Spherical bearings and rod ends.
The new Rear Uprights won't work on the stock lower control arms however there is a package price for buying both. The Revised Lower Control Arms will work with the existing cast upright though.
About Camber Climb, we reduced the height of the upper pickup point on the upright to reduce the angle of the upper lateral link. This cuts the rate of camber climb by almost half, meaning if you're running wide tires (295 >) the contact patch is better on the exit of corners so you can put down more power. Also tire wear is more even across the tread face, especially at lower ride heights.
About Roll Stiffness, by lowering the pickup point of the lower control arm on the upright the axle center went up and the lower control arm becomes horizontal or droops slightly downward at the hubs depending on ride height. By making the lower control arms horizontal to slight droop we raise the instantaneous roll center, thereby reducing the lever arm length which the sway bar controls weight transfer side to side.
The result is a flatter cornering attitude without increased ride harshness that would come from stiffer bars or springs. The roll stiffness has improved geometrically rather than mechanically. Same effect, without adding NVH, noise, vibration and harshness.
About Coil/Over Shock travel, simply lowering the pickup point of the lower control arm extends the shock length, gives back almost .750" on our existing A-Arms. A shock absorber mount modification on the jig means our new production A-Arms will have a full inch more travel.
Note how the shock mount on the lower arm is angled to match the rear castor (anti squat angle). This keeps the bushings in the coil overs free.
There are pics of the stock uprights installed (with our billet mounting blocks to fit the new arms) so you can see the angles compared to the new parts.
We've also revised the tooling for the new upright since the last postings so any brand of brake caliper/rotor can be accomodated. Shown are the standard PBR mounts, however AP, Brembo, Wilwood... no problem.
Still three choices of colour, black, aluminum or charcoal metalic. Still a core credit for the old uprights too, but you do get new SKF bearings of course.
There's a lot of potential in the CAV monocoque chassis, it's a really strong part. The purpose of these new suspension components it is to give the pre 100 series cars the absolute maximum performance from the chassis using bolt on parts and only hand tools required.
If you're doing any lapping days or plan to track the car occassionaly, these are must have parts. Enough techno-bable, how do you like'm?
Cheers
Thought some pics of our new Rear Uprights mounted on a chassis would show what we're aiming at with these parts. They weigh the same as the cast aluminum/steel mounting blocks bolted together assembly while being much stronger and improved cooling for the brakes and wheel bearings.
Like the new Front Uprights, these parts are intended for the "100 Series" cars made by or with parts from the original Cape Advanced Vehicles. Owners of post 100 s/n cars already have upgrades from Autofutura so these parts aren't applicable.
The new Rear Uprights optimize the rear suspension geometry in several areas: Camber climb, Roll stiffness, Coil/Over Shock travel, and work in conjunction with our Revised Lower Control Arms to give adjustable Toe-in and elimination of all binding from the rubber bushings replaced with Aurora Spherical bearings and rod ends.
The new Rear Uprights won't work on the stock lower control arms however there is a package price for buying both. The Revised Lower Control Arms will work with the existing cast upright though.
About Camber Climb, we reduced the height of the upper pickup point on the upright to reduce the angle of the upper lateral link. This cuts the rate of camber climb by almost half, meaning if you're running wide tires (295 >) the contact patch is better on the exit of corners so you can put down more power. Also tire wear is more even across the tread face, especially at lower ride heights.
About Roll Stiffness, by lowering the pickup point of the lower control arm on the upright the axle center went up and the lower control arm becomes horizontal or droops slightly downward at the hubs depending on ride height. By making the lower control arms horizontal to slight droop we raise the instantaneous roll center, thereby reducing the lever arm length which the sway bar controls weight transfer side to side.
The result is a flatter cornering attitude without increased ride harshness that would come from stiffer bars or springs. The roll stiffness has improved geometrically rather than mechanically. Same effect, without adding NVH, noise, vibration and harshness.
About Coil/Over Shock travel, simply lowering the pickup point of the lower control arm extends the shock length, gives back almost .750" on our existing A-Arms. A shock absorber mount modification on the jig means our new production A-Arms will have a full inch more travel.
Note how the shock mount on the lower arm is angled to match the rear castor (anti squat angle). This keeps the bushings in the coil overs free.
There are pics of the stock uprights installed (with our billet mounting blocks to fit the new arms) so you can see the angles compared to the new parts.
We've also revised the tooling for the new upright since the last postings so any brand of brake caliper/rotor can be accomodated. Shown are the standard PBR mounts, however AP, Brembo, Wilwood... no problem.
Still three choices of colour, black, aluminum or charcoal metalic. Still a core credit for the old uprights too, but you do get new SKF bearings of course.
There's a lot of potential in the CAV monocoque chassis, it's a really strong part. The purpose of these new suspension components it is to give the pre 100 series cars the absolute maximum performance from the chassis using bolt on parts and only hand tools required.
If you're doing any lapping days or plan to track the car occassionaly, these are must have parts. Enough techno-bable, how do you like'm?
Cheers
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Actually, it's my pleasure to offer a break to the GT40s Forum members and CAV owners. The 10% discount applies to everything we manufacture, Suspension Arms, ZF Rod Shifters, ZF Transaxle Bracket, Front and Rear Uprights, Grilles, Steering Colum Quick Disconnects and the soon to be available Big Brake Kit for CAVs with 17" wheels.
