[Seven30]

So, I've read through all 13 pages of the Racing forum and used the Search function heavily, but it is still unclear to me how many actually had a spindle fail, where it failed, and how the M030 spindles are stronger than stock.

It is my understanding that the M030 spindle is different than stock to fit the 928 S4 calipers, and that since the bearings are the same as for the stock spindle, the strength of what I believe to be the most stressed part - the machined rod - is the same.

Since I've invested* in standard spindles, I'm very interested to find out if the M030 spindles are stronger than stock and how many spindles have actually failed.

Any input is appreciated, as my big fear is to wreck the 968 at high speeds.

*Invested: larger brake calipers, discs, pads that does not fit M030, an extra set of stock spindles that has been to a machine shop to fit the Racer's Edge control arms.

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[Seven30]

No answers, huh [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

I guess Mythbusters would have declared this myth for busted, and that I safely can go ahead and order the non-M030 hubs from RE (or are the new RSB hubs for M030?)

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[flash]

the M030 spindle is heavier duty, with more mass, pretty much all over

the M030 hub is a different spacing, to accommodate the beefier spindle, so it won't interchange with other spindles

call pete - he can tell you more about this, as well as discuss the hubs with you

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[Seven30]

Thanks Flash - I'll get in touch with Pete again [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

I'd still be interested in hearing from others who have had a spindle failure and where it failed. I do accept that the M030 spindle is more heavy duty overall, but that extra material did not go into the machined rod as the inner and outer bearings are the same as stock. Maybe Porsche reinforced the caliper attachment points or even the interface with the a-arm pin.

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[94SilverCab]

http://www.968forums.com/index.php?showtop...&hl=spindle

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[Seven30]

That's a link about the pins in the a-arms breaking, not the spindles - or did I miss something? [img]style_emoticons/<#EMO_DIR#>/smile.gif[/img]

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[Seven30]

So I've checked with a couple of guys who happens to be 968 racers and sell stronger hubs (guess who [img]style_emoticons/<#EMO_DIR#>/wink.gif[/img] ).

Neither had heard of any spindles failing without prior accident damage. So is this myth finally busted?

The response was also that the difference between a non-M030 and a M030 spindle is just the different mounting position for the brake caliper, and that M030 hubs tended to break sooner due to the increased offset. One important advice I'll certainly heed is to have the spindles magnafluxed every year. And of course, heavier + stickier = more load on the hub.

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[flash]

did you contact pete on this?

he and i had a long talk about this - the M030 spindle is beefier - believe that this is for a reason or not - that's up to you - whether or not it results in a failure isn't a myth, and if i had the time to access an old database, i could pull up a couple of failures - i can't say it's nearly as common as the hub or the pin breaking, but it happens - it hasn't happened in a long time that i know of, but there are only a few guys actually racing these cars, and as far as i know, they all have M030 spindles now - i really can't remember why those who had one fail suffered the problem, but i do know it was not related to any accident damage (though it did cause a couple)

does this mean you absolutely must go get them for fear of catastrophic failure? probably not - there are plenty of guys running standard spindles on DE cars without failure

would i race a car without them? probably not - i've had a front suspension failure at high speed, and it nearly killed me - i won't be taking those kinds of chances, when i can throw a little money at it and have the peace of mind

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[aslet]

The real problem is how hard it is to find the M030 soindles and how much they cost if you do. I eventually want to upgrade to M030 brakes, but I was thinking for ease and cost I may just use the adaptors. Is there any known source for the spindles, other than people parting there cars? How much are sets going for currently?

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[Eric_K]

I believe it was the 1986 944 turbo spindles which were prone to failure.

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[flash]

i don't think the 968 spindles are necessarily "prone" to failure as much as more likely to fail than the M030 spindles - having wrecked a car on the track due to a front suspension failure, and walked away to talk about it, i am not inclined to take any chances

we have to keep in mind that we now all run much larger and stickier tires than the car was designed to run - this adds a LOT of load on the suspension that it was never intended to carry - maybe it will fail - maybe it won't - have you thought about the consequences if it does? is it worth the small price of the better components to take that risk?

this is also why i never really got into production class stuff, and will stick with full modifieds, where you can change anything you want - there are just too many compromises and too many failures when you push the envelope in a class where you are limited to what you can change, which tends to have people cutting corners on setup

if and when i put the track car together, i will spare no expense to beef up the suspension - but, that's my personal choice

good luck

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[aslet]

What is there to replace the spindles though? There are hubs and control arms, but I have never seen spindles...

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[flash]

just the M030 stuff so far - nobody has decided to make aftermarket ones, likely for reasons of cost or liability or both

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[Seven30]

I totally agree on not saving money on suspension parts. High-speed failures are an absolute nightmare (I can imagine).



However, since I have invested in an extra set of standard spindles that have been machined to fit the Racer's Edge A-arms, and I have invested in front calipers (that won't fit M030) and expensive rotors and pads to go with them, I will be absolutely sure the M030-spindles are safer than the standard before I make the switch.



I sent Pete an e-mail about the issue and received a reply about the hubs (I asked about them as well). Pete is active on this forum and can fill in. I sent "the other hub vendor", also an avid 968 (and 944) racer, an e-mail and received a response that stated that M030 spindles are not stronger than standard. I trust his advice as absolutely all the bushings and some of the other suspension parts on my car comes from his shop (except for the Polybronze spring plate bushings). Therefore, I'll get my hands on a set of M030 spindles from an 87+ 951 (can't remember the exact year, but I'll check the PET again) and compare them to my standard spindles before I do anything else.

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