RB6 Rear Anti Squat

[bkelsall]

Does anyone know how much each 0.5mm increases or reduces anti squat?

Oh, and what the anti squat is with no shims under either of the blocks?

[bigred5765]

no shims is 2 degree
if i can remember 1mm is 1 degree

[bkelsall]

sweet. many thanks.

[danmurphy]

So 0 under the front and 0.5 under the rear is 2.5deg? I thought the build as per manual was 2deg?

[bigred5765]

no mate o front and rear is 2 degree

[Gavin Collingwood]

Stock build is 1.5 degree, if you lift the back you get less anti squat as the arms are flatter

[danmurphy]

Originally Posted by bigred5765

no mate o front and rear is 2 degree

Originally Posted by Gavin Collingwood

Stock build is 1.5 degree, if you lift the back you get less anti squat as the arms are flatter

Ok thanks guys

[Shimmy]

So, what is it actually?
It seems on this forum and RCTech that almost everyone has a different idea on what is without any shims and how much .5mm and 1mm changes it.

Can we get some solid info or atleast people agreeing on what it is.

No shims = ?
.5mm = ?
1mm = ?

[bigred5765]

Originally Posted by Gavin Collingwood

Stock build is 1.5 degree, if you lift the back you get less anti squat as the arms are flatter

spoke to roger mills gav
no shims is 2 degree
1mm shimm between wishbone hanger and bumper takes away 1 degree making the car 1 degree
1mm shim under the front whishbone hanger is plus 1 degree making it 3 degree

No shims = ?2 degree
.5mm = under the rear1.5 degree
.5mm under the front = 2.5 degree
there is a shimm between the hanger and the bulkhead this has nothing to do with anti squat its to take up the gap between gearbox and hanger if u add a shimm under the hanger u remove the same from on top

[RogerM]

Definitely 2deg with no spacers under either RF or RR blocks.

Shims are 0.5mm thick which equates to 0.75deg per shim (1.5deg per mm) - if you want to get really accurate it's actually moves between 0.71 & 0.78deg due to the swept angle changing too but most people use 0.75 without issue

Same for the ZX5 as the hinge pin holder / wishbone width is the same, see FABs sheet on Petit Lazer setups section

Hope that helps.

[Gavin Collingwood]

Yeah I know, if you know that none is 2 degree it's pretty simple to work out that each mm represents roughly 1 degree without being anal

[RudeTony]

LOL

[Neil Skull]

Yawn!!!!
Ben just drive it!!!

[slow coach]

Originally Posted by RogerM

Definitely 2deg with no spacers under either RF or RR blocks.

Shims are 0.5mm thick which equates to 0.75deg per shim (1.5deg per mm) - if you want to get really accurate it's actually moves between 0.71 & 0.78deg due to the swept angle changing too but most people use 0.75 without issue

Same for the ZX5 as the hinge pin holder / wishbone width is the same, see FABs sheet on Petit Lazer setups section

Hope that helps.

Hi Roger

What's the max you can run under the rear mount for instance could you run 1mm under the RF and 1.5 under the RR, this would give a slightly higher roll center and less squat than kit approx 1.25deg?? (if read correct)

also not related to squat settings but if you move the rear inboard arm shim to the rear how will this change the car we are talking MM set up

Thanks in advance

[RogerM]

Max you can fit under RR is 1mm, unless you modify the rear bulkhead of course.

It would LOWER not raise the R'C' (theoretically increasing rear grip a little) but due to the RB6's driveshaft angles raising the inner hinge pin will actually start to reduce the grip as a result of the change relative to diff centre height affecting the driveshaft plunge.

Kyosho seem to have the hinge pin height spot on for 90% of conditions; on super high grip running +1mm under RF and nothing under RR gives great forward drive, on lower grip 0mm under RF and 1mm under RR keeps the back nicely in check.

In VERY extreme conditions I have raised the transmission (equal spacers needed between chassis and motor guard + trans case and don't forget to put equal spacers between rear bulkhead and trans case tab).