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pinion angle
#11
(05-15-2018, 12:23 PM)Bentworker Wrote: If the driveshaft is just dead straight like you describe you shouldn't have any vibration issues.  Only catch is that you will wear the joints themselves out earlier as the needles will wear in one spot.  I'd just run it.

Getting ready to do a suspension update so I will address it more after all the changes have been made. So yes I will drive it for now
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#12
(05-15-2018, 03:16 PM)Tnfastbk Wrote:
(05-15-2018, 12:23 PM)Bentworker Wrote: If the driveshaft is just dead straight like you describe you shouldn't have any vibration issues.  Only catch is that you will wear the joints themselves out earlier as the needles will wear in one spot.  I'd just run it.

Getting ready to do a suspension update so I will address it more after all the changes have been made. So yes I will drive it for now

Tnfastbk,
I already had a digital angle finder and decided to get some numbers from my 71 fastback with toploader.
Trans output shaft + 3.0 degrees
driveshaft              -  1.7 degrees
pinion shaft           -   1.0 degrees
the spicer calculator shows angle 1 @ 4.4 degrees
angle 2 shows @.7 degrees
looks like I will be getting some pinion shims soon
Anyone have a clue why the trans. output shaft would be + 2.7 degrees ?
my car originally had a 302 and automatic and I swapped the toploader from a 73 Mach.
all original parts.
no vibrations at any speed, added staggered rear shocks and under ride traction bars
3.50 gears and 255/60r15 tires.
no wheel hop what so ever, but the car simply will NOT hook up.
lots of torque from my Barnett racing 408 C.
complete smoke fest in 1st and 2nd gears from a 1500 rpm standing start.
Suggestions welcome.
Boilermaster
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#13
Have you considered some sort of traction device such as a set of caltracs? They are a little spendy at about $340 but I did see someone posted somewhere how to make a set.

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
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#14
(05-16-2018, 02:19 PM)73pony Wrote: Have you considered some sort of traction device such as a set of caltracs? They are a little spendy at about $340 but I did see someone posted somewhere how to make a set.

73 pony,
already have Tin mans subframe connectors with his under ride traction bars.
was looking into caltracs though.
Going to try my best with driveline angles first (hopefully with a little help from the forum )
Boilermaster
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#15
How do you like the tinman subframe connectors? How was fit and installation?

73 Grandé H Code. Headman long tube headers, T-5 Transmission, 3.70 Traclok, Lowered 1" all around, Aussie 2v heads w/ 2.19 intake, 1.71 exhaust, screw in studs, full roller cam 608/612 lift 280/281 duration LSA 112, Quick Fuel 750 CFM double pumper, AirGap intake.

- Jason


[Image: 082-hot-rod-power-tour-2017-1970-1970s.jpg]
  Reply
#16
(05-16-2018, 02:39 PM)73pony Wrote: How do you like the tinman subframe connectors? How was fit and installation?
73pony,
Tinman's subframe connectors fit and install great.
Most people can't bend over enough to see that they are installed on my car.
One added extra , they made my car quieter going down the road.
Boilermaster
  Reply
#17
(05-16-2018, 02:10 PM)boilermaster Wrote:
(05-15-2018, 03:16 PM)Tnfastbk Wrote:
(05-15-2018, 12:23 PM)Bentworker Wrote: If the driveshaft is just dead straight like you describe you shouldn't have any vibration issues.  Only catch is that you will wear the joints themselves out earlier as the needles will wear in one spot.  I'd just run it.

Getting ready to do a suspension update so I will address it more after all the changes have been made. So yes I will drive it for now

Tnfastbk,
I already had a digital angle finder and decided to get some numbers from my 71 fastback with toploader.
Trans output shaft + 3.0 degrees
driveshaft              -  1.7 degrees
pinion shaft           -   1.0 degrees
the spicer calculator shows angle 1 @ 4.4 degrees
angle 2 shows @.7 degrees
looks like I will be getting some pinion shims soon
Anyone have a clue why the trans. output shaft would be + 2.7 degrees ?
my car originally had a 302 and automatic and I swapped the toploader from a 73 Mach.
all original parts.
no vibrations at any speed, added staggered rear shocks and under ride traction bars
3.50 gears and 255/60r15 tires.
no wheel hop what so ever, but the car simply will NOT hook up.
lots of torque from my Barnett racing 408 C.
complete smoke fest in 1st and 2nd gears from a 1500 rpm standing start.
Suggestions welcome.
Boilermaster

The reason I started looking at mine was I do have somewhat of a vibration. That being said if I had no vibration I believe I would leave that alone. As far as traction goes I run the Caltrac setup and they eliminated all my wheel hop but 1st and 2nd could be totally useless if I so choose and I run an 18x9.5inch rear with a 275/40zr tire . So as far as traction goes I think with the 15inch wheel that's just life,sorry to say.
[Image: my_mustang_375.jpg]

[Image: my_mustang_376.jpg]

[Image: my_mustang_377.jpg]

delete my
  Reply
#18
Here's a 101 on traction bars and instructions on building your own caltrac style traction bars.
http://www.hotrodsandhemis.com/Traction.html



“If you can't explain it simply, you don't understand it well enough.”
--Albert Einstein
  Reply
#19
(05-16-2018, 02:10 PM)boilermaster Wrote:
(05-15-2018, 03:16 PM)Tnfastbk Wrote:
(05-15-2018, 12:23 PM)Bentworker Wrote: If the driveshaft is just dead straight like you describe you shouldn't have any vibration issues.  Only catch is that you will wear the joints themselves out earlier as the needles will wear in one spot.  I'd just run it.

Getting ready to do a suspension update so I will address it more after all the changes have been made. So yes I will drive it for now

Tnfastbk,
I already had a digital angle finder and decided to get some numbers from my 71 fastback with toploader.
Trans output shaft + 3.0 degrees
driveshaft              -  1.7 degrees
pinion shaft           -   1.0 degrees
the spicer calculator shows angle 1 @ 4.4 degrees
angle 2 shows @.7 degrees
looks like I will be getting some pinion shims soon
Anyone have a clue why the trans. output shaft would be + 2.7 degrees ?
my car originally had a 302 and automatic and I swapped the toploader from a 73 Mach.
all original parts.
no vibrations at any speed, added staggered rear shocks and under ride traction bars
3.50 gears and 255/60r15 tires.
no wheel hop what so ever, but the car simply will NOT hook up.
lots of torque from my Barnett racing 408 C.
complete smoke fest in 1st and 2nd gears from a 1500 rpm standing start.
Suggestions welcome.
Boilermaster

Boilmaster,

You have a Barnett 408?  As in Tim Barnett?  When did he build it? how's it holding up? What heads did you use?

Kevin

1971 Mach 1
408C Stroker
C4 w/3,000 stall
8.8" Rear w/3.73's
Disc brakes all way around.

[Image: 044.jpg]

https://youtu.be/SoW1fhaFPzY
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#20
Turtle5353,
Tim Barnett built (my block, my heads) 408 this last winter.
Have about 500 miles on it so far, starts and runs flawlessly.
Sounds like a stocker, runs completely different than stock.
I am however blaming Tim on my traction concerns.
Boilermaster
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