Brad,
I think that would make that applicable to Spits too then wouldn?t it?? If so
I would want a copy of any info you have.
[http://dieselperformanceparts.com/media/mail/logo_small_dppi.png]<dieselperformanceparts.com>
Mark Craig
Diesel Performance Parts, Inc.
411 Allied Drive, Nashville, TN 37211
www.dieselperformanceparts.com<http://www.dieselperformanceparts.com/>
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Phone: 615-834-0066
Fax: 615-834-9923
From: Brad Eells [mailto:tr4abrad at gmail.com]
Sent: Thursday, March 22, 2018 1:46 PM
To: DPPI - Mark Craig <info at dieselperformanceparts.com>
Cc: Kas Kastner <kaskastner at gmail.com>; fot at autox.team.net
Subject: Re: [Fot] Rear Axle upgrade GT6
Hello Amici,
My Mk3 Spitfire came with a set of the original Kastner-Brophy rear axles. They
were designed by my car?s owner/builder/driver, Doug Brown who worked for Kas
at that time.
I found among Doug?s notes, much information and sketches of the design work. I
am happy to share them if anyone finds value in the information beyond
historical curiosity.
As Kas mentioned, it?s a combination of material, forging and ancillaries that
make these particular axles nearly indestructible.
I have recently refurbished my set. I found the yoke parts to be Spicer parts
that are still available. I also did some research on U-Joints and upgraded to
a stronger, non-greasable Dana-Spicer unit.
This solution is applicable only to the earlier models without Rotoflex or
other double jointed later axles.
Brad Eells
Sent from my iPhone
Sure always need info on anything like that.
I sure wish you had some of yours around today!!!
I confirmed on that car as best as I could after the wreck that the axle isn?t
hitting the frame as it passes over it between the diff and the wheel end.
Checked the other cars I got too so far none of them do. I did notice all the
frames are crushed in that area and it seems like it was done at the factory
too??
<image001.png><dieselperformanceparts.com>
Mark Craig
Diesel Performance Parts, Inc.
411 Allied Drive, Nashville, TN 37211
www.dieselperformanceparts.com<http://www.dieselperformanceparts.com/>
<image002.jpg><https://www.facebook.com/DieselPerformanceParts>
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Phone: 615-834-0066
Fax: 615-834-9923
From: Kas Kastner [mailto:kaskastner at gmail.com]
Sent: Thursday, March 22, 2018 11:59 AM
Subject: Re: [Fot] Rear Axle upgrade GT6
Really sorry to hear of this. My axles were made of material which was so
costly and hard to find I had to by 500 pounds of it. Then I had the axles
forged instead of billet machined. All this does not help you a bit but I can
give you a part number a much better and bigger U-joint which we also included
with my axles if that will be a help. My research years ago on this was the
rear end of the car was bottoming out and putting all the weight on the axle
and it just could not hold it.
Never be beaten by equipment.
Yes they were Sommers Bros out of CA. The U Joint failed.
I hear the Joe Siam ones are breaking too. A friend in FL has had two sets of
them break.
That?s why when I started to rebuild the wreck I thought I would go with the
Canley CV axles and the GT6 lower arms. At least if the axle breaks the wheel
stays upright. But now I hear the Canley CV axle isn?t strong enough for a GT6
and I am nervous. I really didn?t want to do that as it changes the ?Attitude?
of the Spit and how it feels, but I don?t want to end up on me head again
either.
Here?s a U tube link to the accident:
https://www.youtube.com/watch?v=05dsw_zQD0k
<image006.png><http://dieselperformanceparts.com>
Mark Craig
Diesel Performance Parts, Inc.
411 Allied Drive, Nashville, TN
37211<https://maps.google.com/?q=411+Allied+Drive,+Nashville,+TN+37211&entry=gmail&source=g>
www.dieselperformanceparts.com<http://www.dieselperformanceparts.com/>
<image002.jpg><https://www.facebook.com/DieselPerformanceParts><image003.jpg><https://twitter.com/PerfectDiesel>
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Phone: 615-834-0066
Fax: 615-834-9923
Sent: Thursday, March 22, 2018 11:29 AM
Subject: Re: [Fot] Rear Axle upgrade GT6
Are you using or rather were you using one piece axles where the hub and the
axle are one piece?
Never be beaten by equipment.
Hum, I got a set of the Canley CVs for the Spit that broke an axle and then
rolled 4 times.
I have that car almost in one piece again and now you got me cautious?? A Spit
vs GT6 is a lot of difference in weight and engine load though. Anyone got any
thoughts?? I don?t want to go for that ride again. I am adding GT6 lower arms
to keep the wheel form getting under the car, but still don?t want failure.
<http://dieselperformanceparts.com>
Mark Craig
Diesel Performance Parts, Inc.
411 Allied Drive, Nashville, TN 37211
www.dieselperformanceparts.com<http://dieselperformanceparts.com>
<http://dieselperformanceparts.com>
Phone: 615-834-0066
Fax: 615-834-9923
Sent: Thursday, March 22, 2018 9:38 AM
Subject: Re: [Fot] Rear Axle upgrade GT6
Scott & Mark.
I looked at my records and we show the CV joints that failed (yes it was me in
the 5 laps) we purchased were from Rimmer Brothers (sp?) in England in the
spring of 2016.
I can?t tell if they are the same guys or were resellers of the same product,
but they looked identical to these units and I doubt there were more than one
manufacturer of these in 2016.
And yes they failed, so I would NOT recommend for racing.
We compared the rear end system on our Kastner 1972 GT6 #6 and the Group 44
1972 GT6 and reviewed the whole history with Kas, Scott, Craig Miller, Andy
MacLaurin.
In the end we converted the Group 44 car to the Corvair Datsun solution as
engineered in 1971 based on a set of engineering drawings Craig Miller had that
had all the machining details.
Since that installation in Sept 2016 we have had no problems. The Group 44 car
runs a Quaife diff with Redline Shockproof 75W90 gear oil with this
configuration.
Kas? 1972 GT6 runs a different outer hub configuration he constructed using
Vascojet steel. Here is Kas?s note from 2016 ?We broke axle shafts and hubs a
lot in the beginning and gave up on the normal steels available. In the end I
purchased a load of Vascojet steel that was prescribed by steel engineers to
me, this is what is used in the outer axles of my GT-6. It was expensive and
hard to find and I bought all in the USA at the time about 200 pounds. I paid
for forging dies and had the axles forged from this material. Now this was
almost 50 years ago so inquiry of steels might be a hot tip.? Kas? solution
provides an inner bearing retainer flange and nut at the hub carrier side of
the axle, thereby preventing wheel loss in a failure. That car runs his
original parts from 1972 and our last magnaflux shows no signs of failure or
cracking. As he says, Never Beaten by Equipment, even after all these years.
We had no trouble sourcing Corvair parts and GM bearings.
Date: Thursday, March 22, 2018 at 2:10 AM
Subject: Re: [Fot] Rear Axle upgrade GT6
I?ve seen one of those break after five laps in a GT6.
Canley in England has a CV axle set up for the Spits and GT6.
<image001.png>
MARK CRAIG
Diesel Performance Parts, Inc.
411 Allied Drive, Nashville, TN
37211<https://maps.google.com/?q=411+Allied+Drive,+Nashville,+TN+37211&entry=gmail&source=g>
www.dieselperformanceparts.com<http://www.dieselperformanceparts.com>
<image002.jpg> <image003.jpg> <image004.jpg> <image005.jpg>
Phone: 615-834-0066
Fax: 615-834-9923
Sent: Wednesday, March 21, 2018 11:07 AM
Subject: Re: [Fot] Rear Axle upgrade GT6
Vince - I'm not sure that the TR6 axles would fit your GT6 because the bearing
carrier for the Herald-based cars is a lot smaller than the TR6 is. I suppose
you could make it fit, but you'd have to make a custom hub carrier. That said,
I know that folks have done various solutions using stub axles from cars like
the 240Z. The "trick" would be to find a hub flange that can be drilled for the
Spitfire / GT6 bolt pattern and then work from there. And you can get brand-new
stub axles for the 240/260/280Z.
Else, source something from the UK.
Also - do you have a GT6 Mk 2 or the early or late-late setup? That also makes
a difference in the solution.
For my TR6, I run Corvair hubs like Group 44 did. But I had those hubs built up
about 20 years ago - the Corvair parts are pretty scarce now. If I were to
build a new car, I'd def. buy the Goodparts setup - he makes really excellent
parts!
Regards,
Bob Lang
Good day all,
I am wondering if anyone has tried John Goods Axle conversion kit on their
racing GT6? It is a CV conversion but doesn?t replace the Hub which worries me.
http://www.goodparts.com/shop/index.php?categoryID=20
There are sturdier more complete TR6 kits but I?m not sure I could retrofit one
of those.
Thanks for any feedback.
Vince
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