5-Lug 911 Conversion, Caliper differences? Options

[Spoke]

I'm doing a 5-lug conversion for my new 914 and need some help understanding the differences in front 911 calipers. I've seen "A", "M", and "S" calipers referred to. What's the difference? Which one(s) should I try to get? Lastly, anybody got a set of front struts/rotors/calipers?

Thanks,
Spoke

PS: If this topic has been covered before, please forward the link to me.

[brp914]

A & S are the same sized caliper, S is aluminum, A is steel (iron), the aluminum calipers flex under heavy braking, also the A & S have 3.5" mounting bolt spacing. These have a larger pad than the M

M calipers have a smaller pad than the A & S, are iron bodied, and have 3.00" mounting bolt spacing.

Any of those calipers will work fine, S calipers command a premium

I have a comlplete 911 front end M calipers with vented discs ( this was from a 911 T with S package)

couldnt have summed it up better meself...

i find that M calipers with an agressive pad are more than adequate to make my car stand on the nose.......

S calipers are $$$$$$$$$$$$$$$


An m caliper front end is anywhere from 200- 500
an A caliper front end is 500-800
Add a couple hundred to the above for S calipers....

huh? whuzzat? one willingly pays a premium to have his calipers flex!? Isn't the whole idea behind a monoblock caliper to have less flex? And it being aluminum having the benefit of better heat dissipation and less unsprung weight?

as far as stopping quickly, when cold a regular 914 caliper will stop just as fast as an "m" or even an "a". The question is fade resistance and modulation. Or are you saying there are tires out there so sticky that the caliper is overwhelmed? but even then, this can be compensated for with pad selection.