Holidays are here and had some time this arvo. Had some KMAC adjustable top hats lying about from my old VH Commodore.

 

Thought I would see if I could modify them or the rolla to avoid buying new hats.

 

The result was very surprising.

 

Pic of the original rolla top hats

 

 

Even though the spacing between the bolts in the Commodore are larger, the smaller bolt diameter was enough that it bolted in with no modifications :-)

 

 

And then finished

 

 

I haven't checked the camber or castor angles yet. Camber looks to be about the same at 0, and that is with the hats as far negative as they go. Car is currently getting Rona/Pug/Lux brakes atm so not sure what effect this has had on suspension geometry. Will be picking up some Sigma LCA's in the next week which will make negative camber and then it should be able to be corrected with the Commodore strut tops.

 

Seems to have added some negative castor and the hats are currently in the middle of adjustment. Can turn the hats around 120' and that will make positive castor if for any reason I require it.

Edited December 23, 201213 yr by 4AGEKE55

Sure it bolts on, but the travel isn't correct, and that's why it's affecting your camber and caster settings. Obviously a strut top for the KE55 (which K-MAC has) will allow the full range of adjustment.

 

Good to have some time off though... why are you getting new control arms?

how much movement do you have before the spring hits the strut tower?

Am getting new LCA's to increase the front track and to get some negative camber. I think from memory that the 55 actually came with +1.0 camber. Sigma LCA's will add too much negative camber yet then can adjust it with the commo top hats. Have flared the wheel arches. The back wheels sit nicely in the guards, on a standard width R31 diff. The fronts are sitting a bit far inside.

 

I can move the full range, which is 16mm, for castor with clearance front and back. Camber I can only adjust 12mm. Then the hat hits the inside of the tower. I might grind 4mm off the hat which will give it full adjustment. Yet the top spring cap will then hit the tower. Until I get coilovers.

that or try use ke70 struts cause the spring diameter is smaller