'70 e-body spindle strong enough to run 12" rotor?

Posted By: kielbasa

'70 e-body spindle strong enough to run 12" rotor? - 01/13/12 01:51 AM

Hi guys, want to run 12" rotors on my AAR (came with discs)...I know bearing adapters exist to run the larger wheel bearings on the 70~72 spindles.
Is there anything to worry about with the smaller spindle diameter, or am I worrying about nothing?
p.s. will be used for street driving, no autocrossing.
Thanks!

Posted By: DoctorDiff

Re: '70 e-body spindle strong enough to run 12" rotor? - 01/13/12 02:42 AM

I doubt you will have a problem. Ford and GM used the same "small" spindle diameter for years regardless of engine size/vehicle weight.

Posted By: 1_WILD_RT

Re: '70 e-body spindle strong enough to run 12" rotor? - 01/13/12 03:33 AM

Quote:

I doubt you will have a problem. Ford and GM used the same "small" spindle diameter for years regardless of engine size/vehicle weight.

Chrysler went to the larger spindle not for strength but to fit the larger bearing... The smaller bearings were prone to failure... Cass's bearing spacer allows the big bearing to be used with the small spindle, similar spacers are used in industrial applications without issues every day...

Posted By: autoxcuda

Re: '70 e-body spindle strong enough to run 12" rotor? - 01/13/12 04:09 AM

Some of AndyF Brembo caliper and big disk conversions use an even lighter 73-76 A-body drum spindle. Tim Werners 68 Valiant has run that setup on the track up to 140+ mph cutting some very impressive lap times!