I disagree. For the GT6 race car if you want to go fast that is simply not true.
Jason Ostrowski
Friendly Ghost Racing
Sent from my iPhone
> On Jul 14, 2015, at 3:56 PM, John Hasty <jhasty@mhc-law.com> wrote:
>
> Shock loading in road race conditions is why the guys at SPEC say you should
> use a clutch disc with springs
>
> Sent from my iPhone
>
> On Jul 14, 2015, at 4:19 PM, "Peter Vucinic"
> <pvucinic@netspace.net.au<mailto:pvucinic@netspace.net.au>> wrote:
>
> Scott,
> To answer some of your questions.
> Would lower oil temps stops â??gear teeth breaking offâ?? Short answer NO.
> However, you should look at the differential as a complete system.
>
> If you had tooth failure It could be due to a number of things: -
>
> 1. Long Term Use/Operation Fatigue Failure
>
> 2. High instantaneous/shock loading Failure
>
> 3. Improper backlash/clearances â?? Causing Tooth Failure as a result
> of incorrect tooth loading
>
> 4. Improper lubrication/type/grade/flow/level/operating temperature
>
> The beauty of synthetic oils is that it allows the system to run at MUCH
> lower temperatures (And operate at higher temps of course) as a direct result
> of the synthetic oil being able to FLOW/POUR with less resistance. Just like
> mixing a cake! The thicker the mix, the higher the work load required to mix,
> the more friction, the hotter the mixing temps.
>
> The other side of the coin, in general, Synthetic is that is has LESS
> mechanical dampening for high shock loading than traditional mineral based
> oils for the same grade product. Even on synthetic engine oils you will see
> description such as â??made for modern/tight clearancesâ?? etc. etc. Reduced
> operating clearances and high oil shearing applications etc. is synthetics
> domain.
>
> So, when you look at the system as a whole. YES, itâ??s important to have the
> oil in its optimum temperature range. BUT all the other factors are equally
> important. The oil is not mutually exclusive in the equation.
>
> Hope that helps?
>
>
>
>
>
>
>
> From: Scott Janzen [mailto:sjanzen@me.com]
> Sent: Tuesday, 14 July 2015 4:44 AM
> To: Peter Vucinic
> Cc: 'Jason Ostrowski'; ''Friends of Triumph' Triumph'
> Subject: Re: [Fot] Gt6 differential failure
>
> so, while I respect the need proper operating temps, if the failure
> experienced is not bearing failure, but simply gear teeth breaking off under
> load, would lower temps help?
> I run Redline synthetic.
>
> On Jul 13, 2015, at 2:32 PM, Peter Vucinic wrote:
>
>
> Get the oil temp down and use full synthetic.
> I did much testing on my road going TR4 diff. Even a road car, at highway
> speed cruising, the oil temp is 180-200F.
> With the diff â??tucked upâ?? and limited air flow. You are starting with a
> problem before you start!
>
>
> "You can Make a Small Fortune From Motor Racing. As long as You Started With
> A Lage Fortune!"
> Kind Regards
> Peter Vucinic
> TR4 - TR7 V8 - Spitfire MkII
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> From: Fot [mailto:fot-bounces@autox.team.net] On Behalf Of Scott Janzen
> Sent: Tuesday, 14 July 2015 12:20 AM
> To: Jason Ostrowski
> Cc: 'Friends of Triumph' Triumph
> Subject: Re: [Fot] Gt6 differential failure
>
> thanks, Jason - yes, I was banging through the gears, and there's now a steep
> 150' +/- DROP at this track, downhill turn, where I was in second gear at
> 7,000 RPM, first accelerating, then letting it slow me down as I approached
> the sharp right to the uphill climb. I'm sure that did not do the diff any
> good.
>
> Somehow the idea of putting a Subaru diff in this car does not feel very
> "vintage".
>
> Question - has anyone checked the oil temp, and would cooling make a
> difference? I do run Redline 75-85 gear oil.
>
> I will report back and send carnage photos when I get it out.
>
> On Jul 13, 2015, at 10:12 AM, Jason Ostrowski wrote:
>
> I agree that it is consumable.
> A change to something different would seem to lead to a redesign of all the
> parts that mate to it and that could turn into a whole new set of other
> related projects.
> Likely a costly and complex endeavor to say the least.
> Knowing you, I assume you are using a quality oil already as Steve recommends.
> I notice you are racing faster lately and seem to be doing great with the car.
>
> Begin Public Service announcement to all FoT...
>
> That being said, (especially the faster you go) don't forget to remind
> yourself regularly about how you need to treat the drivetrain.
> Perhaps most importantly on this issue is careful driving with a constant
> focus to smooth transition between the gears.
> And really important is super smooth take-offs.
> I'm lucky to have John Reed (best GT6 racer of all time) at the track with me
> most of the time.
> He is never afraid to remind me of this.
> And does so on a regular basis when I'm leaving the grid.
> Even after all these years of coaching he will still often yell at me through
> my helmet prior to taking off.
> something like....
> "Ride that F$#&%ng clutch baby!!"
> or "Easy take off".
> Wisdom I'm not afraid to admit I need to be reminded of in a tense moment
> taking off to hit the track.
> One slip of the foot or abrupt start is all it takes to do damage to the
> differential.
> I can trace most of my differential failures back to sketchy shift
> transitions or abrupt starts...
> We all hate to admit that an equipment failure is our own fault but, speaking
> for myself, I know it often is.
> This was an FoT Public Service Announcement...
> Brought to you by Friendly Ghost Racing.
>
> Jason Ostrowski
> Friendly Ghost Racing
> 1969 Triumph GT6+ Racecars
>
>
> On Sun, Jul 12, 2015 at 7:01 AM, Scott Janzen
> <sjanzen@me.com<mailto:sjanzen@me.com>> wrote:
> Mine disintegrated in a big way in the last race yesterday at Pitt Race. Last
> one did the same thing about 3-4 years ago.
> Should I just consider this a consumable item, or swap to something stronger?
> What are other vintage racers doing?
>
> Sent from my mobile device
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