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+2mm Rear Roll Centre – DNX408

ttt-408-raisedpin-title
TTT-408-RaisedPin-bothinserts2

Raising the roll centre on the rear of the DNX408 is a modification some of our team drivers have been using recently to good effect and it’s a simple and cheap modification to implement using only Team Durango parts.

Pro Driver Billy Fischer says about the mod: “I feel that it gives the rear end of the car much more support for jumping and landing, as well as allowing the car to take the bumps better without bottoming out nearly as much.”

As standard the DNX408 can be built with 2 or 3 degrees of anti-squat and these settings are achieved with the various moulded inserts that push into the machined alloy hangers.  The rear-rear hanger inserts all currently use a central hole which is angled to match the off-set hole on the rear-front hanger inserts that set the anti-squat angle.

Using the RR 3/2 (rear inserts) and RF 3/2 (front) inserts on the back of the standard car gives 3 degrees of toe-in and 2 degrees of anti-squat.   To use this modification those are the inserts and angles you need to be running – the 3/3 items don’t have the same adjustment option.

TTT-408-RaisedPin-animationBefore and after – the +2mm Roll Centre mod.

To raise the inner hinge pin 2mm we need to raise up the rear-rear suspension hangers by that ammount as well as the front.  The rear hangers can be spaced up using the 2mm spacers from the DEX410 caster blocks – part number TD709004. You just need one packet of these since there’s 4 in the pack and that’s how many you’ll need.  Place the spacers under the rear-rear blocks and screw them down using longer 3×12 screws, part number TD704022 (the kit screws are 3x10mm).  You could use the kit-supplied 3x10mm screws but it’s sub-optimal and you risk damaging things since there’s less thread going into the blocks, you have been warned.

ttt-408-raisedpin-spacers1 The anodised spacers and longer 3 x 12mm cap head screws ready to attach the suspension hanger ttt-408-raisedpin-spacers2 Hanger attached and raised up 2mm.

To raise the leading end of the pin by the same ammount you can’t simply space up the rear-front hanger sine it’s trapped by the rear bulkhead but there’s an even simpler way – just swap the insers around so you’re using the right on the left, and left on the right.

ttt-408-raisedpin-insert1 The 3/2 rear-front insert has a low front pin hole ttt-408-raisedpin-insert2 Switching sides places the hole 2mm higher to match the rear-rear height

The inserts should then have the writing upside down – still using the 3/2 inserts. This raises the front end of the pin by 2mm to match the setting from the raised rear-rear hangers – keeping the 3/2 setting but raising the pin height and roll centre.

ttt-408-raisedpin-insertbrace Putting the left insert on the right and vice versa to raise the front end of the pin ttt-408-raisedpin-insertbrace2 The inserts should end up with the writing upside down
ttt-408-raisedpin-overview

With the +2mm rear raised roll centre mod complete you can expect the rear end to support itself more and have less roll in the corners – also helping the car over bumpy tracks and prevening it from bottoming out too easily.

150wideTTT

Parts required:

TD709004  – CASTER BLOCK SPACER 3x8x2.00mm (4pcs)

TD704022  – CAP HEAD HEX SCREW M3x12mm (10pcs)

+2mm Rear Roll Centre – DNX408
TD330303 – ‘408 Toe-in and kick-up inserts
Turnbuckle Build Guide
DNX408 Ackermann link mod
DNX408 Receiver Fitment
DNX408 Shock Build Guide
DNX408 Brake Piston Alignment
DNX408 Drive Shaft Boot Install
DNX408 Gearbox Input ‘Snapring’ install procedure
DNX408 Brake Shimming
DNX408 Throttle Linkages
DNX408 Setup from Reno Savoya
Your local Team Durango distributor
COUNTRY:
T: 217-398-3630
F: 217-398-1104
E: gpinfo@gpmd.com
W: www.gpmd.com
Great Planes Model Distributors
1608 Interstate Drive
Champaign,
IL 61822, USA
USA