GMC product ideas

dave1

New member
Jul 23, 1998
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A while back someone (I don't remember who) was asking for ideas for new
products for our GMC's. Here are a couple I was thinking about while I was
swapping my final drive and doing front end maintenance these past couple
weeks.

1) Lug nut torque amplifier. For those of you who have ever tried to remove
the lug nuts from your wheels, its a real pain. It takes a breaker bar with
a long pipe on the handle. Just about the point where it feels like the
breaker bar is going to shatter, the nut lets go with a loud crack. What is
needed is a device that will straddle two lug nuts, one for leverage and
the other to be loosened. Maybe a ratio of 3 or 4 to one would be
sufficient to get enough torque to get the nuts loose without so much
effort. I have seen something along these lines but it cost something like
$300-$400. What we need is something simple and cheep like maybe in the
$100 range. Maybe just two gears, one large one welded to a 7/8" socket
(fits the lug nut) and a smaller gear welded to a socket with the inner
surfaces ground off (so it slides easily around a lug nut). If someone
knows of a cheap source of gears this may be doable. Maybe the timing gears
from a small one cylinder engine would be close??

2) Aerodynamic radiator fan. The fan blades on the GMC are made up of flat
sheet steel with a bit of a curve. This is not a very aerodynamically
efficient design. The result is a lot of turbulence around the blades
resulting in lost horsepower and excess noise. If a fan where designed that
had full airfoil blades optimized for the speed and load of the GMC it
should free up quite a bit of horsepower and be a lot quieter. It would
take some real engineering skill and a few real world measurements to
determine the aerodynamic loads placed on the fan. It could be an
interesting project for someone who knows a bit about propeller/fan design.
Maybe we could even interest a professor of automotive (or aerospace)
engineering to take it on as a design project for his students. Anyone know
any professors/teachers who are GMC lovers?? Maybe someone in the
engineering department or with friends in the engineering department?

Just a thought or two while getting prepared for the summer travel season...
 
Harbor Fright Tools has an electric torque wrench on sale for $55.00.
It is the Chicago Electric (their house brand I think) made in China.
Not nearly the quality of something you buy at Graingers, but for the
price it might be something to consider for emergencies.

http://www.harborfreight.com/cpi/taf/Category.taf?CategoryID=108

Eric Tipton
etipton

- -----Original Message-----
From: LNelson208 [mailto:LNelson208]
Sent: Wednesday, March 29, 2000 5:05 AM
To: gmcmotorhome
Subject: Re: GMC: GMC product ideas

Regarding the need for a lug nut amplifier, I use an electric impact
wrench
that I bought at Graingers for about $150 IIRC. I stole this idea from
someone else on the net or read it in GMCMM or somewhere. Not only does
it
loosen and tighten but it does it FAST. I do have my torque wrench at my
side
for retightening, but it still is fast, and we almost always have 120
volts
available, one way or the other. Larry in MO, 75PB
 
If anyone is interested, I can get a 1/2" drive torque wrench to 150lbs for around $15..
Let me know offline if ur interested...?

cbwood

CBWood
77 Kingsley
MWC OK
(on 'Digest' now)

- -------------------------------------------------------------
Get free personalized email at http://www.switchboardmail.com
 
Hopefully this will do the trick. Mose electric impact wrenches that I have
seen have a lot less torque than a good air impact, and I question the ability
of your wrench to get off a really tight nut (or rusted . . . ). I say this
because I have the biggest 1/2" air impact that I have seen (600+ ft-lbs of
torque in reverse) and had to overpressure it by 20 lbs and actually BROKE an
impact socket the first time that I tries to get the wheels off my GMC.
Granted, the P/O let some moron grossly overtorque the nuts, but even setting
them with a torque wrench and putting a little oil on the threads (to prevent
rust) when reinstalling, I sometimes still have one that takes a bit of time
and 'rocking' to get loose.

For most routine use, your wrench may be perfect - but you may find some cases
where it may leave you hanging (that or it is more powerful than any that I
have seen, which is not impossible . . . . after all, I am not an impact
wrench 'groupie' after all . . . ). What is the torque rating for your unit
when in reverse?

- - Tim

> Regarding the need for a lug nut amplifier, I use an electric impact wrench
> that I bought at Graingers for about $150 IIRC. I stole this idea from
> someone else on the net or read it in GMCMM or somewhere. Not only does it
> loosen and tighten but it does it FAST. I do have my torque wrench at my side
> for retightening, but it still is fast, and we almost always have 120 volts
> available, one way or the other. Larry in MO, 75PB
>

- --
================================================================================
Tim Dawson (tadawson) Owner/Engineer
TPC Services Bellnet: (972)-221-7385
Lewisville, Texas 75067 FAXnet: (972)-221-0393
"The world is complex. Sendmail.cf reflects this...."
 
> I finally figured out how to get on the GMC NET. I have
> got a lot
> messages already! Jerry

And you will get plenty more now that the Rayne convention is over and
all the gabby guys (and Gals) are back at their keyboards!

Welcome to the Net!

David Lee Greenberg
GMC Motorhome Registry
Dedicated to the preservation of the Classic GMC
http://www.gmcss.com/registry.htm