--===============7601223064190401704==
boundary=Apple-Mail-D325F928-BAA8-44DD-8C06-6FC104564407
Content-Transfer-Encoding: 7bit
--Apple-Mail-D325F928-BAA8-44DD-8C06-6FC104564407
charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Yes, great description. Greg. =20
For those of us with live axle cars you must consider the dynamic relative a=
ngle of the center carrier under load. In higher hp applications the leaf s=
prings will wind up under acceleration and the angle will change. In additi=
on to shortening the life of your u joint, it can lead to wheel hop issues. =
Wheel hop can occur under hard braking from the same windup. On my barracu=
da I stiffened the front spring segment to help limit axle windup. On the C=
heetah there is no driveshaft to worry about... ;)
Brian Garcia
Friendly Ghost Racing
> On Mar 3, 2016, at 7:41 PM, Greg Blake <gblake58tr3@icloud.com> wrote:
>=20
> I love this group. Great stuff.=20
>=20
> Greg
>=20
> Sent from my iPhone
>=20
>> On Mar 3, 2016, at 9:16 PM, Richard Good <goodparts@verizon.net> wrote:
>>=20
>> A straight line drawn through the transmission output shaft should be clo=
se to parallel to a line through the diff pinion shaft. It is OK if the dri=
veshaft is not parallel to these lines. So if the rear of the trans is tilt=
ed down 6.5 degrees then lets say the driveshaft is level, the front U-joint=
operating at a 6.5 deg angle will cause the driveshaft to speed up and slow=
down as it rotates. If the nose of the diff is tilted up at the same 6.5 d=
eg, these velocity oscillations will be cancelled out by the rear U-joint an=
d the diff pinion will rotate smoothly.
>> =20
>> When you say the diff is tilted downward at 5.5 degrees do you mean that t=
he nose is pointed down? This would be a bad situation as the oscillations o=
f the driveshaft would be exaggerated rather than cancelled by the rear U-jo=
int and you would have nasty vibration. Hopefully your diff nose is pointed=
upward 5.5 deg. This would place the imaginary lines within 1 degree of pa=
rallel and close enough for smooth operation.
>> =20
>> Richard Good
>>=20
>> From: damys@charter.net
>> Sent: Thursday, March 03, 2016 8:44 PM
>> To: 'fot@autox.team.net'
>> Subject: [Fot] Driveshaft angles on 1970 GT6
>>=20
>> Need a bit of advice regarding driveshaft angles. The rear transmission f=
lange is tilted downward 6 1/2 degrees. The diff is tilted downward at 5 1/=
2 degrees. The difference is 12 degrees. Is this too much for a universal j=
oint setup to manage? We've considered raising the front of the diff, but t=
hen the spring will be twisted and we don't know how this will affect the re=
ar suspension. Any help is appreciated.
>>=20
>>=20
>>=20
>> Dave and Alex
>>=20
>> _______________________________________________
>> fot@autox.team.net
>>=20
>> http://www.fot-racing.com
>>=20
>> Donate: http://www.team.net/donate.html
>> Archive: http://www.team.net/archive
>> Forums: http://www.team.net/forums
>> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/gblake58tr3=
@icloud.com
> _______________________________________________
> fot@autox.team.net
>=20
> http://www.fot-racing.com
>=20
> Donate: http://www.team.net/donate.html
> Archive: http://www.team.net/archive
> Forums: http://www.team.net/forums
> Unsubscribe/Manage: http://autox.team.net/mailman/options/fot/cudapilot@co=
mcast.net
>=20
>=20
--Apple-Mail-D325F928-BAA8-44DD-8C06-6FC104564407
charset=utf-8
Content-Transfer-Encoding: quoted-printable
<html><head><meta http-equiv=3D"content-type" content=3D"text/html; charset=3D=
utf-8"></head><body dir=3D"auto"><div></div><div>Yes, great description. Gre=
g. </div><div><br></div><div>For those of us with live axle cars you m=
ust consider the dynamic relative angle of the center carrier under load. &n=
bsp;In higher hp applications the leaf springs will wind up under accelerati=
on and the angle will change. In addition to shortening the life of yo=
ur u joint, it can lead to wheel hop issues. Wheel hop can occur under=
hard braking from the same windup. On my barracuda I stiffened the fr=
ont spring segment to help limit axle windup. On the Cheetah there is=
no driveshaft to worry about... ;)</div><div><br></div><div>Brian Garcia</d=
iv><div>Friendly Ghost Racing</div><div><br>On Mar 3, 2016, at 7:41 PM, Greg=
Blake <<a href=3D"mailto:gblake58tr3@icloud.com";>gblake58tr3@icloud.com<=
/a>> wrote:<br><br></div><blockquote type=3D"cite"><div><meta http-equiv=3D=
"content-type" content=3D"text/html; charset=3Dutf-8"><div>I love this group=
. Great stuff. </div><div id=3D"AppleMailSignature"><br></div><div id=3D=
"AppleMailSignature">Greg<br><br>Sent from my iPhone</div><div><br>On Mar 3,=
2016, at 9:16 PM, Richard Good <<a href=3D"mailto:goodparts@verizon.net"=
>goodparts@verizon.net</a>> wrote:<br><br></div><blockquote type=3D"cite"=
><div>
<meta content=3D"text/html;charset=3Dutf-8" http-equiv=3D"Content-Type">
<meta name=3D"GENERATOR" content=3D"MSHTML 11.00.10586.122">
<div><font face=3D"Calibri">A straight line drawn through the transmission o=
utput=20
shaft should be close to parallel to a line through the diff pinion shaft.&n=
bsp;=20
It is OK if the driveshaft is not parallel to these lines. So if the r=
ear=20
of the trans is tilted down 6.5 degrees then lets say the driveshaft is leve=
l,=20
the front U-joint operating at a 6.5 deg angle will cause the driveshaft to=20=
speed up and slow down as it rotates. If the nose of the diff is tilte=
d up=20
at the same 6.5 deg, these velocity oscillations will be cancelled out by th=
e=20
rear U-joint and the diff pinion will rotate smoothly.</font></div>
<div><font face=3D"Calibri"></font> </div>
<div><font face=3D"Calibri">When you say the diff is tilted downward at 5.5 d=
egrees=20
do you mean that the nose is pointed down? This would be a bad situati=
on=20
as the oscillations of the driveshaft would be exaggerated rather than cance=
lled=20
by the rear U-joint and you would have nasty vibration. Hopefully your=
=20
diff nose is pointed upward 5.5 deg. This would place the imaginary li=
nes=20
within 1 degree of parallel and close enough for smooth operation.</font></d=
iv>
<div><font face=3D"Calibri"></font> </div>
<div><font face=3D"Calibri">Richard Good</font></div>
<div style=3D"FONT: 10pt Tahoma">
<div><br></div>
<div style=3D"BACKGROUND: #f5f5f5">
<div style=3D"font-color: black"><b>From:</b> <a title=3D"mailto:damys@chart=
er.net
CTRL + Click to follow link" href=3D"mailto:damys@charter.net";>damys@charter=
.net</a> </div>
<div><b>Sent:</b> Thursday, March 03, 2016 8:44 PM</div>
<div><b>To:</b> <a title=3D"fot@autox.team.net" href=3D"mailto:'fot@autox.te=
am.net'">'fot@autox.team.net'</a> </div>
<div><b>Subject:</b> [Fot] Driveshaft angles on 1970 GT6</div></div></div>
<div><br></div>
<p>Need a bit of advice regarding driveshaft angles. The rear transmis=
sion=20
flange is tilted downward 6 1/2 degrees. The diff is tilted downward a=
t 5=20
1/2 degrees. The difference is 12 degrees. Is this too much for a=
=20
universal joint setup to manage? We've considered raising the front of=
the=20
diff, but then the spring will be twisted and we don't know how this will af=
fect=20
the rear suspension. Any help is appreciated.</p>
<p><br></p>
<p>Dave and Alex</p>
<p>
</p><hr>
<p></p>
</div></blockquote><blockquote type=3D"cite"><div><span>____________________=
___________________________</span><br><span><a href=3D"mailto:fot@autox.team=
.net">fot@autox.team.net</a></span><br><span></span><br><span><a href=3D"htt=
p://www.fot-racing.com">http://www.fot-racing.com</a></span><br><span></span=
><br><span>Donate: <a href=3D"http://www.team.net/donate.html";>http://www.te=
am.net/donate.html</a></span><br><span>Archive: <a href=3D"http://www.team.n=
et/archive">http://www.team.net/archive</a></span><br><span>Forums: <a href=3D=
"http://www.team.net/forums";>http://www.team.net/forums</a></span><br><span>=
ake58tr3@icloud.com">http://autox.team.net/mailman/options/fot/gblake58tr3@i=
cloud.com</a></span><br><span></span><br><span></span><br></div></blockquote=
></div></blockquote><blockquote type=3D"cite"><div><span>___________________=
____________________________</span><br><span><a href=3D"mailto:fot@autox.tea=
m.net">fot@autox.team.net</a></span><br><span></span><br><span><a href=3D"ht=
tp://www.fot-racing.com">http://www.fot-racing.com</a></span><br><span></spa=
n><br><span>Donate: <a href=3D"http://www.team.net/donate.html";>http://www.t=
eam.net/donate.html</a></span><br><span>Archive: <a href=3D"http://www.team.=
net/archive">http://www.team.net/archive</a></span><br><span>Forums: <a href=
=3D"http://www.team.net/forums";>http://www.team.net/forums</a></span><br><sp=
an>Unsubscribe/Manage: <a href=3D"http://autox.team.net/mailman/options/fot/=
cudapilot@comcast.net">http://autox.team.net/mailman/options/fot/cudapilot@c=
omcast.net</a></span><br><span></span><br><span></span><br></div></blockquot=
e></body></html>=
--Apple-Mail-D325F928-BAA8-44DD-8C06-6FC104564407--
--===============7601223064190401704==
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
_______________________________________________
fot@autox.team.net
http://www.fot-racing.com
Archive: http://www.team.net/archive
--===============7601223064190401704==--
|