2 top ideas

[droopypete]

For someone like myself who spends a fair bit of time searching the net, it is funny to find a place in Geelong selling 3 great items (2 of which I had never heard of)
http://www.gearingdynamics.com/cvboot.htm
http://www.gearingdynamics.com/greasecv.htm
http://www.gearingdynamics.com/exhaustbrake.htm

Enjoy
Peter.

[JemmyBubbles]

Thats all good stuff..

I know trucks run exhaust brakes obviously... but are they in any way harmful ? Is there any evidence to suggest so ?? If not why don't I see more on diesel fourby's that do a bit of towing...

[droopypete]

forget the towing issue for a moment and think of compression braking on a steep hill, with the exception of a magnetic retarder, an exhaust brake is king
Peter.

[JemmyBubbles]

Yeah but forcing the crap to stay in...was my point.. Engine braking would beat my nanna in a fight it is that good, there is no doubt there. (what am I doing... ). But actively assisting it does it hurt ??

I hate feathering the anchors going down steep long hills... like the one at moonbi near tamworth...so I would use this...

[pongo]

spoke to a mate who is a plant mechanic and he reckons that the exhust valves may get too hot and burn out

cheers

[Big Red Toy]

the cv boot is awesome
the greaseable cv is awesome unless it make the axle/ cv assembly weaker, otherwise

[RV80]

I posted up the greaseable CV ages ago http://www.outerlimits4x4.com/PHP_Modul ... asable+cvs

[gone fishin]

the split CV boots will save a lot of money in labour costs if they can come up with a universal split 1 to suit IFS vehicles, I have asked many people about this and they reckon it can't be done, but it looks like these people have done their homework.

[crankycruiser]

I love the idea of that cv boot..

Any one got any idea if the swivel housing on the 79 series is the same as the 80 series???

[Mick_n_Sal]

They can't do it for IFS cv boots because the boot itself rotates with the shaft - therefore it has to flex while rotating.

These ones are covers for swivel hubs. They should work OK for what they are meant for - provided they don't get full of crud and chew out the swivel hub seals.

[grimbo]

forget the towing issue for a moment and think of compression braking on a steep hill, with the exception of a magnetic retarder, an exhaust brake is king
Peter.

Tony Saul used to run an engine brake on his diesel jackaroo years ago in the Rhino Trophy. Used work a treat .

[Surfection]

I hate feathering the anchors going down steep long hills... like the one at moonbi near tamworth...so I would use this...

Off topic but speaking of the Moonbi hill, that area would be awesome to buy land and set up a 4wd park. Shame it's in the middle of no where but every time we go past on the way to Tenterfield I'm pressed up against the window drooling over the awesome rock. Anyone know how much land is up that way !?

[HRZOOK]

I think split CV boots for VWs have been around for yonks

[droopypete]

the greaseable cv is awesome unless it make the axle/ cv assembly weaker, otherwise

The hole would actualy make the axle shaft stronger, not weaker, but it is the bell of the CV that usualy fails not the shaft, the beauty of this is the ability to pump that bell full of grease from the outside.
Peter.

[ISUZUROVER]

the greaseable cv is awesome unless it make the axle/ cv assembly weaker, otherwise

The hole would actualy make the axle shaft stronger, not weaker, but it is the bell of the CV that usualy fails not the shaft, the beauty of this is the ability to pump that bell full of grease from the outside.
Peter.

Sorry, but the hole makes the shaft weaker. This has been discussed to death in the past and there is a mathematical proof on pirate that a drilled shaft is weaker than a solid shaft of equivalent diameter and material.

Probably won't be much weaker though.

[Zute]

Exhaust brakes can be dangerous on wet tar roads. eg, a sudden lift off the throttle at speed, can cause a lock up at the rear axle, resulting in a uncontrolled slid. And that's why you don't find them on forbies.
I have also herd that over use, can cause the engine to "coke" up.
Trucks also have very open exhausts and don't have much engine braking. Thus need exhaust brakes.

[JemmyBubbles]

[/quote]

Off topic but speaking of the Moonbi hill, that area would be awesome to buy land and set up a 4wd park. Shame it's in the middle of no where but every time we go past on the way to Tenterfield I'm pressed up against the window drooling over the awesome rock. Anyone know how much land is up that way !?[/quote]

You would only need like 25 acres. Especially on the way to inverell sp? It is just boulders galore. But the rocks around that particular area are just vast outcrops and would be really sweeeet to have a play on..

I know at walcha my folks paid 250k for 225acres with a little house and the place backs onto the apsley gorge.... So prolly something around that price...

[droopypete]

the greaseable cv is awesome unless it make the axle/ cv assembly weaker, otherwise

The hole would actualy make the axle shaft stronger, not weaker, but it is the bell of the CV that usualy fails not the shaft, the beauty of this is the ability to pump that bell full of grease from the outside.
Peter.

Sorry, but the hole makes the shaft weaker. This has been discussed to death in the past and there is a mathematical proof on pirate that a drilled shaft is weaker than a solid shaft of equivalent diameter and material.

Probably won't be much weaker though.

I am certainly not about to take on pirate I was simply repeating what both the engineer and the metallurgist were saying, they seemed to know what they were talking about, but as they are not on pirate they probably don't know shit
Peter.

[ISUZUROVER]

I am certainly not about to take on pirate I was simply repeating what both the engineer and the metallurgist were saying, they seemed to know what they were talking about, but as they are not on pirate they probably don't know shit
Peter.

I have been told that too by plenty of metallurgists, however when I read the proof of the equations on it made complete sense to me (can't find it at the moment though).

And thinking about it logically, there is no reason why a shaft with a hole through the middle would be stronger (in torsion) than an identical shaft without a hole. The people that try to argue that gun-drilled shafts are stronger say that it can be heat treated on the inside or that there are 2 surfaces that need to resist fracture, but this just doesn't stand up when you really think about it. But, all that said, gun-drilled shafts are not much weaker.

[Tooheys]

If its the bell that always breaks could you get it heat-treated by Haultech?
Then you would have the best of both worlds.

[Pauwolf]

I know that I used to snap axles every 3 months or so in my drag car, once I got a standard one drilled it lasted over 12 months. Twisted like buggery but didnt snap

Paul

[CheesePony]

spoke to a mate who is a plant mechanic and he reckons that the exhust valves may get too hot and burn out

cheers

Hey,

I'm a bit wary on deciding if I should put an exhaust brake on my ute..

I think burning of the valves would be the biggest thing..

[HSV Rangie]

For someone like myself who spends a fair bit of time searching the net, it is funny to find a place in Geelong selling 3 great items (2 of which I had never heard of)
http://www.gearingdynamics.com/cvboot.htm
http://www.gearingdynamics.com/greasecv.htm
http://www.gearingdynamics.com/exhaustbrake.htm

Enjoy
Peter.

Also makes detroit lockers under licence.

Makes a detroit to fit L/c transfer case

can make gears and axles ect.

top place.

Michael.

[DiddyZook]

Exhaust brakes are fantastic. This topic has come up before and it always seems that most people have never used them or understand them but have an opinion.

I run two trucks with them and would love to have that same level of control on a fourby (if i had a big one rather than the Zook). My trucks are Isuzu NKR200s which are only 4.2GVM with a 4.3litre diesel engine, not too dissimilar from some common fourbies.

As far as running it all the time causing damage, maybe. But that might also be why they come with a switch, so you can turn it off if not carrying a load. On a fourby, you would not need to leave it on all the time, maybe only offroad or when towing.

I am sure it must be the evil exhaust brake that only allows 7-800,000 km life in a truck engine whilst your average family car is dead inside 300,000km.

Exhaust brakes may not suit most drivers as they never take their vehicle truly offroad or carry a load approaching the tare weight of their vehicle, but as an optional extra it shoud rate along with lockers or reduction gearing as an awesome control aid.

[crankycruiser]

I emailed them and found that the CV boots do fit an 80 and they are 220 +gst....

[460cixy]

have seen early land rovers with simlar boots on then but made out of a canvas type stuff was to stop the salt on there roads eating the crome off the balls or some shit most found that just filled up with shit but the rubber ones look ok.

[Dee]

i cant for the life of me work out why they dont just put rubber CV boots on all vehicles from standard...

I heard that alot of overseas/european cars had them on as standard for preventing the salt on the roads (in snow) damaging them. They may as well put em on all cars...