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Terry Coombs[_2_] September 10th 19 09:46 PM

Metal fatigue sucks
 
* And repairing it pays well . I've got a bush hog deck in the shop
that has some fatigue issues , the area where the gearbox mounts is (was
....) all busted up , I've cut out both layers and am going to weld new
steel in - there is ~ 3/4 inch overlap so the joins won't be right on
top of each other . I spent most of the morning machining those pieces
of plate for the gear box mount . The deck skirt is all beat up , I get
to use my five-bucks-at-a-yard-sale porta-power unit to straighten it
out . I'll also be repairing (second time) the "stump-jumper" disc that
the blades mount to . I'll be checking with the owner , but plan to also
grind out and re-weld several spots where there are small cracks
starting in some of the weldments . I don't know how old this thing is ,
but I do know it gets used hard and the owner is happy enough with it to
spend a few hundred bucks repairing the damage . And since I'm planning
on spending some money on my truck , I'm more than happy to take his !
* Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .

--
Snag
Yes , I'm old
and crochety - and armed .
Get outta my woods !


Leon Fisk[_2_] September 10th 19 10:24 PM

Metal fatigue sucks
 
On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .


Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)

--
Leon Fisk
Grand Rapids MI


Terry Coombs[_2_] September 10th 19 10:54 PM

Metal fatigue sucks
 
On 9/10/2019 3:24 PM, Leon Fisk wrote:
On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .

Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)


* The problem here is that we've got hills , many of them quite steep .
I'd like to top Dodd Mountain (on the way home from town) at more that
35 MPH empty ... probably a 5-6% grade and if I'm loaded it's more like
20 MPH . The 2.73's force me down into a lower gear and I'd have to rev
higher than I like to top out any faster . 3.42's will put my (stock)
torque peak at around 60 MPH , should help with mileage too .

--
Snag
Yes , I'm old
and crochety - and armed .
Get outta my woods !


Clare Snyder September 11th 19 04:21 AM

Metal fatigue sucks
 
On Tue, 10 Sep 2019 16:24:30 -0400, Leon Fisk
wrote:

On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .


Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)


Put smaller wheels on it - - - - -

My truck has 3.55 gears - but when I put the 16 inch wheels on
instead of the factory 14s it had the effect of putting in 3:27s or
3:31s

pyotr filipivich September 11th 19 04:37 AM

Metal fatigue sucks
 
Terry Coombs on Tue, 10 Sep 2019 14:46:32 -0500
typed in rec.crafts.metalworking the following:
* And repairing it pays well . I've got a bush hog deck in the shop
that has some fatigue issues , the area where the gearbox mounts is (was
...) all busted up , I've cut out both layers and am going to weld new
steel in - there is ~ 3/4 inch overlap so the joins won't be right on
top of each other . I spent most of the morning machining those pieces
of plate for the gear box mount . The deck skirt is all beat up , I get
to use my five-bucks-at-a-yard-sale porta-power unit to straighten it
out . I'll also be repairing (second time) the "stump-jumper" disc that
the blades mount to . I'll be checking with the owner , but plan to also
grind out and re-weld several spots where there are small cracks
starting in some of the weldments . I don't know how old this thing is ,
but I do know it gets used hard and the owner is happy enough with it to
spend a few hundred bucks repairing the damage . And since I'm planning
on spending some money on my truck , I'm more than happy to take his !


Isn't it nice to have friends willing to pay for your repairs?
--
pyotr filipivich
"With Age comes Wisdom. Although far too often, Age travels alone."

Terry Coombs[_2_] September 11th 19 05:20 AM

Metal fatigue sucks
 
On 9/10/2019 9:21 PM, Clare Snyder wrote:
On Tue, 10 Sep 2019 16:24:30 -0400, Leon Fisk
wrote:

On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .

Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)

Put smaller wheels on it - - - - -

My truck has 3.55 gears - but when I put the 16 inch wheels on
instead of the factory 14s it had the effect of putting in 3:27s or
3:31s


* I'll probably put some taller tires on this truck , IIRC it's
currently running p235/75 - 15's . Got a great buy on a set of
nearly-new Kenda's , the ones that were on it were about worn out so I
replaced them .

--
Snag
Yes , I'm old
and crochety - and armed .
Get outta my woods !


Clare Snyder September 11th 19 06:33 AM

Metal fatigue sucks
 
On Tue, 10 Sep 2019 22:20:00 -0500, Terry Coombs
wrote:

On 9/10/2019 9:21 PM, Clare Snyder wrote:
On Tue, 10 Sep 2019 16:24:30 -0400, Leon Fisk
wrote:

On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .
Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)

Put smaller wheels on it - - - - -

My truck has 3.55 gears - but when I put the 16 inch wheels on
instead of the factory 14s it had the effect of putting in 3:27s or
3:31s


* I'll probably put some taller tires on this truck , IIRC it's
currently running p235/75 - 15's . Got a great buy on a set of
nearly-new Kenda's , the ones that were on it were about worn out so I
replaced them .

You MAY want to look for something with "shorter legs" if going with
bigger tires. And be VERY carefull if modifying the engine to make
sure you are increasing the low end torque - not high RPM power.

The old 292 Chevy 6, for instance, had a LOT more low end grunt than a
Z28 302 V8 even though the 302 put out a lot more horsepower. A 292
could outpull a lot of 350s. It put out 280 ft lbs at 1600 RPM
compared to a stock 1981 350 with at 289 at 1600 -some 350's put out
as much as 380 ftlbs at 3200 - which doesn't do much for crawling up a
mountain.

Had 4.57 or 514 gears in the old '69 C30 292 and we were licenced for
GCVW of 22 tons. I'm sure it was overloaded on occaision, but it was
never lacking for power to pull away from a stop. A Cockshutt 1855
with a fulkl load of calcium was well over 12000 lbs - the truck was
over 3800 - and the big tri-axle float had to weigh well over 3000 -
then throw on a 6 furrow plow - - - - and a 100 gallon saddle tank.

I got it stuck, but never ran out of torque.

Michael Terrell September 11th 19 09:11 AM

Metal fatigue sucks
 
On Wednesday, September 11, 2019 at 12:33:10 AM UTC-4, Clare wrote:
On Tue, 10 Sep 2019 22:20:00 -0500, Terry Coombs wrote:
On 9/10/2019 9:21 PM, Clare Snyder wrote:
On Tue, 10 Sep 2019 16:24:30 -0400, Leon Fisk wrote:

On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .
Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)
Put smaller wheels on it - - - - -

My truck has 3.55 gears - but when I put the 16 inch wheels on
instead of the factory 14s it had the effect of putting in 3:27s or
3:31s


* I'll probably put some taller tires on this truck , IIRC it's
currently running p235/75 - 15's . Got a great buy on a set of
nearly-new Kenda's , the ones that were on it were about worn out so I
replaced them .

You MAY want to look for something with "shorter legs" if going with
bigger tires. And be VERY carefull if modifying the engine to make
sure you are increasing the low end torque - not high RPM power.

The old 292 Chevy 6, for instance, had a LOT more low end grunt than a
Z28 302 V8 even though the 302 put out a lot more horsepower. A 292
could outpull a lot of 350s. It put out 280 ft lbs at 1600 RPM
compared to a stock 1981 350 with at 289 at 1600 -some 350's put out
as much as 380 ftlbs at 3200 - which doesn't do much for crawling up a
mountain.

Had 4.57 or 514 gears in the old '69 C30 292 and we were licenced for
GCVW of 22 tons. I'm sure it was overloaded on occaision, but it was
never lacking for power to pull away from a stop. A Cockshutt 1855
with a fulkl load of calcium was well over 12000 lbs - the truck was
over 3800 - and the big tri-axle float had to weigh well over 3000 -
then throw on a 6 furrow plow - - - - and a 100 gallon saddle tank.

I got it stuck, but never ran out of torque.


The 292 was a great engine. I had one with a five speed manual transmission in a '73 Chevy Stepvan with an all steel Union City body. It had plenty of torque. and it was in most of our school busses in the mid '60s.

I made two trips to Florida in it, and I hauled a little over 17,000 pounds in those two trips. It weighed 3150 pounds, empty. It had a 30 gallon tank, but there was room for four 30 gallon and one 15 gallon tanks.

Terry Coombs[_2_] September 11th 19 01:26 PM

Metal fatigue sucks
 
On 9/10/2019 11:33 PM, Clare Snyder wrote:
On Tue, 10 Sep 2019 22:20:00 -0500, Terry Coombs
wrote:

On 9/10/2019 9:21 PM, Clare Snyder wrote:
On Tue, 10 Sep 2019 16:24:30 -0400, Leon Fisk
wrote:

On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .
Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)
Put smaller wheels on it - - - - -

My truck has 3.55 gears - but when I put the 16 inch wheels on
instead of the factory 14s it had the effect of putting in 3:27s or
3:31s

* I'll probably put some taller tires on this truck , IIRC it's
currently running p235/75 - 15's . Got a great buy on a set of
nearly-new Kenda's , the ones that were on it were about worn out so I
replaced them .

You MAY want to look for something with "shorter legs" if going with
bigger tires. And be VERY carefull if modifying the engine to make
sure you are increasing the low end torque - not high RPM power.

The old 292 Chevy 6, for instance, had a LOT more low end grunt than a
Z28 302 V8 even though the 302 put out a lot more horsepower. A 292
could outpull a lot of 350s. It put out 280 ft lbs at 1600 RPM
compared to a stock 1981 350 with at 289 at 1600 -some 350's put out
as much as 380 ftlbs at 3200 - which doesn't do much for crawling up a
mountain.

Had 4.57 or 514 gears in the old '69 C30 292 and we were licenced for
GCVW of 22 tons. I'm sure it was overloaded on occaision, but it was
never lacking for power to pull away from a stop. A Cockshutt 1855
with a fulkl load of calcium was well over 12000 lbs - the truck was
over 3800 - and the big tri-axle float had to weigh well over 3000 -
then throw on a 6 furrow plow - - - - and a 100 gallon saddle tank.

I got it stuck, but never ran out of torque.


* IF I cam it , it will be with a cam designed for low end grunt . The
305 already has a low RPM torque advantage due to it's long stroke ...
when I was a boy Dad had a '62 Chevy 3/4 ton p/u with a 235 six . Our
friends had a 50-something Ford with a flathead V8 . With similar loads
- say a slide-in camper and pulling a trailer with 2 horses , that Ford
would walk away from us on the flat . But once we hit the canyons , we
had the advantage . Ours had 4.11's , dunno what the Ford had . My old
'58 Chevy 3E Apache had 4.57's ... And a 283 with a .480/288° RV cam and
a 2 barrel (otherwise stock). Hill , what hill ? I used that truck to
pull stumps , in low range 4x4 and 1st gear it would climb a wall if it
had traction .

--
Snag
Yes , I'm old
and crochety - and armed .
Get outta my woods !


Clare Snyder September 12th 19 03:08 AM

Metal fatigue sucks
 
On Wed, 11 Sep 2019 06:26:27 -0500, Terry Coombs
wrote:

On 9/10/2019 11:33 PM, Clare Snyder wrote:
On Tue, 10 Sep 2019 22:20:00 -0500, Terry Coombs
wrote:

On 9/10/2019 9:21 PM, Clare Snyder wrote:
On Tue, 10 Sep 2019 16:24:30 -0400, Leon Fisk
wrote:

On Tue, 10 Sep 2019 14:46:32 -0500
Terry Coombs wrote:

snip
Got a 3.42 gearset sittin' here awaiting install ... 2.73's just
don't cut it up here . I may decide I don't need a cam/headers/manifold
to be happy with the way it drives after I get it geared down some .
Ye'r getting old... I'm happy if it drives nowadays at any speed ;-)
Put smaller wheels on it - - - - -

My truck has 3.55 gears - but when I put the 16 inch wheels on
instead of the factory 14s it had the effect of putting in 3:27s or
3:31s
* I'll probably put some taller tires on this truck , IIRC it's
currently running p235/75 - 15's . Got a great buy on a set of
nearly-new Kenda's , the ones that were on it were about worn out so I
replaced them .

You MAY want to look for something with "shorter legs" if going with
bigger tires. And be VERY carefull if modifying the engine to make
sure you are increasing the low end torque - not high RPM power.

The old 292 Chevy 6, for instance, had a LOT more low end grunt than a
Z28 302 V8 even though the 302 put out a lot more horsepower. A 292
could outpull a lot of 350s. It put out 280 ft lbs at 1600 RPM
compared to a stock 1981 350 with at 289 at 1600 -some 350's put out
as much as 380 ftlbs at 3200 - which doesn't do much for crawling up a
mountain.

Had 4.57 or 514 gears in the old '69 C30 292 and we were licenced for
GCVW of 22 tons. I'm sure it was overloaded on occaision, but it was
never lacking for power to pull away from a stop. A Cockshutt 1855
with a fulkl load of calcium was well over 12000 lbs - the truck was
over 3800 - and the big tri-axle float had to weigh well over 3000 -
then throw on a 6 furrow plow - - - - and a 100 gallon saddle tank.

I got it stuck, but never ran out of torque.


* IF I cam it , it will be with a cam designed for low end grunt . The
305 already has a low RPM torque advantage due to it's long stroke ...
when I was a boy Dad had a '62 Chevy 3/4 ton p/u with a 235 six . Our
friends had a 50-something Ford with a flathead V8 . With similar loads
- say a slide-in camper and pulling a trailer with 2 horses , that Ford
would walk away from us on the flat . But once we hit the canyons , we
had the advantage . Ours had 4.11's , dunno what the Ford had . My old
'58 Chevy 3E Apache had 4.57's ... And a 283 with a .480/288 RV cam and
a 2 barrel (otherwise stock). Hill , what hill ? I used that truck to
pull stumps , in low range 4x4 and 1st gear it would climb a wall if it
had traction .

Likely either a 3.92 or a 4.27 on an f1 of f100.
On an f2 most likely 4.27 - possibly even higher.

Ratios changed when they went to the "Y" block - with 3.73 being
common on the F100


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