Outer Limits 4x4 Board

Guys,

will the factory diff lock run on a turbo engine?

I have a suspicion it won't, as it relies on negative pressure (vacum) and not positive (boost)

if so, is there any way to rig it up so it will still have a vacum source?

(for a tb42 efi turbo - still in planning/researching stages)

TIA,

Brian.

the brake system on the patrol runs on a vacuum system.. so im thinking that the diff locks would source their vacuum from the vacuum tank that resides in the engine bay and is fed vacuum from the alternator...

(that is on a diesel thou... dunno bout petrols )

One way valves and vaccum tanks.
J Top

what size vacum tank we talking here? any chance of a photo?

I tried to search, but mostly came up with things about fish tanks

yeah they need to run off the vacuum pump on the alternator on diesel's. my mates turbo has one and i have one in my petrol. both work, and i dont even run a solenoid system for mine, just vacuum lines and tiny irrigation taps.

any chance of a photo or two of your engine bay?

i'll see if i can get a pic of where his run's from, mine won't help as it is petrol.

mine's petrol.. so a photo of yours will be helpful!

The vac tank is the same as other models pretty tiny the diesel one would only be about 300ml. Dont think I have noticed one under the bonnent of my petrol. There is a vac tank but think that is for the Cruise control. not nissan fitted.

sorry mate, should of read your first post properly :p

i ran mine from the tree on the inlet manifold. mine is carby atm but i will be converting to efi. all you should need to do is get a T piece for a vacuum line on your intake manifold and plumb it up that way. i have to change 2 hoses over when i want to engage the diff lock. i tried using 2 taps, simply one off and the other on for unlock, then change the taps around so the one that was origanally closed is open and vice versa. the problem i had there was that the diaphragm in the diff needs to draw air back down the now closed line to allow it to move to the other position. what i ended up doing was removing one of the taps and then all i need to do is have one vac line disconnected and connect the other one for it to lock in, then swap them over to unlock it. its a bit of a pain atm cause it is all still under the bonnet but i will be running the vac lines into the cab on top of the dash somewhere so i dont have to get out to change it over.

i think its much better than paying $240 from nissan for the genuine solenoid to operate it by a switch, it's not like i have to do it that often.

if you want to have a look at what i've done at all, you could always come up to morayfield on a weekend and meet up with me and i'll show you. plus it would be much easier to explain it in person i think.

Packy wrote:sorry mate, should of read your first post properly :p

i ran mine from the tree on the inlet manifold. mine is carby atm but i will be converting to efi. all you should need to do is get a T piece for a vacuum line on your intake manifold and plumb it up that way. i have to change 2 hoses over when i want to engage the diff lock. i tried using 2 taps, simply one off and the other on for unlock, then change the taps around so the one that was origanally closed is open and vice versa. the problem i had there was that the diaphragm in the diff needs to draw air back down the now closed line to allow it to move to the other position. what i ended up doing was removing one of the taps and then all i need to do is have one vac line disconnected and connect the other one for it to lock in, then swap them over to unlock it. its a bit of a pain atm cause it is all still under the bonnet but i will be running the vac lines into the cab on top of the dash somewhere so i dont have to get out to change it over.

i think its much better than paying $240 from nissan for the genuine solenoid to operate it by a switch, it's not like i have to do it that often.

if you want to have a look at what i've done at all, you could always come up to morayfield on a weekend and meet up with me and i'll show you. plus it would be much easier to explain it in person i think.

Packy
you should be able to run what I think is called a 3way valve (bit like a 3way 12v switch). They have on-off-on. So first off is VAC diff-locked. Then just turn the valve to the other on posistion which would be VAC diff-unlocked.

Also pretty sure theres a thread around here somewhere where it mentions something about getting vac solinoids of some other cars from the wreckers. Then just use a 3way elec switch.

turps wrote:you should be able to run what I think is called a 3way valve (bit like a 3way 12v switch). They have on-off-on. So first off is VAC diff-locked. Then just turn the valve to the other on posistion which would be VAC diff-unlocked.

Also pretty sure theres a thread around here somewhere where it mentions something about getting vac solinoids of some other cars from the wreckers. Then just use a 3way elec switch.

yeah i spoke to 4x4 wreckers at strathpine a few weeks ago and they said the same thing, just haven't had the time and money to get there and get some. will be doing it soon though as it would be much easier.

I think we got a bit off topic here

I'll clear a few things up:

vacum locker setup is in my how it arrived from factory - I did NOT put it in later on.. so everything needed to make it run is there now

carby petrol = vacum
efi turbo = boost (locker no worky due to absence of vacum)

what I'm after is a way to keep vacum source there on a turbo motor so the diff lock will still work

Comprende?

Cheers,

B.

g'day mate,

not having a factorylocker myself, imnot 100% sure how they operate. do they need vacuum all the time to operate, or simpley need vacuum to lock in and then they stay in?

if it is the later (which i assume it would be) you should be able to use a one way valve similar to what is used on the brake booster of all turbo cars. i have one on my celica.

turbo motors still produce vacuum most the time, they only make boost when you are up them.... so when braking the motor is generally on vacuum, hence brake boosters etc still work. i assume you have to be stationary to lock the diff, so at that time the motor will be producing vacuum too.

i hope this makes sense and im not too far off track....

Cheers
Stew

toy77 wrote:g'day mate,

not having a factorylocker myself, imnot 100% sure how they operate. do they need vacuum all the time to operate, or simpley need vacuum to lock in and then they stay in?

if it is the later (which i assume it would be) you should be able to use a one way valve similar to what is used on the brake booster of all turbo cars. i have one on my celica.

turbo motors still produce vacuum most the time, they only make boost when you are up them.... so when braking the motor is generally on vacuum, hence brake boosters etc still work. i assume you have to be stationary to lock the diff, so at that time the motor will be producing vacuum too.

i hope this makes sense and im not too far off track....

Cheers
Stew

the problem with that is that the locker will sometimes pull out by itself if it has no vacuum holding it in. tested this on mine when i put compressed air to the diaphragm and it popped out.

the only thing i could suggest is getting an arb compressor and hooking it up that way, might need to check this out cause too much pressure might tear the diaphragm, or you could have it set up like it is now and just reverse the vacuum lines going to the diff. this would turn the locker on with boost but when you aren't into it then it could unlock cause the pressure reverses. might pay to talk to some professionals about it as they might have a solution for you. sorry i couldn't help you mate.

hey,
remember with a 1 way valve, there will never be pressure on the diaphram..... jut not always vacuum. it may have a residual vacuum left it the line, im not 100% sure on the operation of the valve. but your brakes always work in a turbo, so it might be a way round the prob,
cheers
Stew

Will a setup with two small air compressor work? One to engage and keep it locked and another to unlock.

run ur vacuum line from the suck side of the turbo or get a diesel alternator and use the vac pump

killer_garden_gnome wrote:run ur vacuum line from the suck side of the turbo or get a diesel alternator and use the vac pump

x 2
if its a petrol put it on the intake side of the turbo, if its a diesel, back of the alternator

My turboed Diesel GQ has factory lockers.
They're damned slow to engage and disengage, but it's obviously possible to have them on a turbo diesel, cause mine sure aren't using a compressor or anything else to operate them that I know of.

God dam am i in the shit??

I about to have a Turbo Tb42 patrol on monday ...

Will my brakes and stuff work? Can i use my factory diff lock still? Will my clutch and all that stuff be hard as !! when on full boost?

Rick.

Mulisha wrote:God dam am i in the shit??

I about to have a Turbo Tb42 patrol on monday ...

Will my brakes and stuff work? Can i use my factory diff lock still? Will my clutch and all that stuff be hard as !! when on full boost?

Rick.

You won't be using that stuff on full boost, well clutch and brakes anyway, one way valves, or intake side, will fix

Mulisha wrote:God dam am i in the shit??

I about to have a Turbo Tb42 patrol on monday ...

Will my brakes and stuff work? Can i use my factory diff lock still? Will my clutch and all that stuff be hard as !! when on full boost?

Rick.

you may have to fiddle round a bit, either get an electronic vacuum pump (used on V8s with big cams and carbys and have bugger all vacuum) or move them on the suck side of the turbo

cloughy wrote:

Mulisha wrote:God dam am i in the shit??

I about to have a Turbo Tb42 patrol on monday ...

Will my brakes and stuff work? Can i use my factory diff lock still? Will my clutch and all that stuff be hard as !! when on full boost?

Rick.

You won't be using that stuff on full boost, well clutch and brakes anyway, one way valves, or intake side, will fix

Hmm one way valves.. are they like what u use on fishy tanks lol

How does a one valve work?

As i have no idea ..

Thanks !!!

Rick.. !!!

Mulisha wrote:

cloughy wrote:

Mulisha wrote:God dam am i in the shit??

I about to have a Turbo Tb42 patrol on monday ...

Will my brakes and stuff work? Can i use my factory diff lock still? Will my clutch and all that stuff be hard as !! when on full boost?

Rick.

You won't be using that stuff on full boost, well clutch and brakes anyway, one way valves, or intake side, will fix

Hmm one way valves.. are they like what u use on fishy tanks lol

How does a one valve work?

As i have no idea ..

Thanks !!!

Rick.. !!!

It only lets something travel one way, as the name suggests

Turbo engine (petrol) is only boosting while accelerating, ussually faster than your nanna, and under vacuum while on light cruise and decelleration (or driving like nanna), so you use a 1 way valve to store tha vacumm built up during those moments and seeing as you don't generally brake or change gears while accelerating, you don't need large reserves

If anyone else can dumb it down better, feel free, i not so good at splaining stuff

Thanks a shit load mate for that mate i just didn't know what that valve would do .. i do know though

My car isn't home at the moment so i can't see if there is a vac line going from my clucth to my manifold or something and if i could just buy one of those fish tank one way vales u use on the air line..

http://images.google.com.au/imgres?imgu ... safe%3Doff

Thanks alot

Rick.

Best to plump all vac into a small tank/resevoir, then hav a main line feeding it, with a one way valve slightly more industrial than that, Is the turbo being fitted??? if so, I dare say it'll be taken care of

you can fit vac tank off deisel td42 with non return valve that is in line after the alternater. Mount tank to inner gaurd or fire wall n run the hose from your manifold that feeds your brake booster to non return valve to t peice 1 end to brake booster other to tank then run all your normal vac difflock stuff off tank then when your under booste you will still have brakes n diff lock