Thread: Another 120 project begins

very nice find. Did anyone else notice it came with front and rear Maxidrive diff locks fitted

I've not seen this thread before!! A very familiar vehicle!!! How'd ya go with those wheels?

Thanks Serg,

She was no show pony when I picked her up, but did have a few goodies installed including front and rear Maxidrive lockers in laminated axles. I've been working on the rest of the drivetrain to give the ol' girl a new lease on life.

I came across a couple of things I couldn't say no to, one thing led to another and well, I have a virtually new drivetrain waiting to come together, comprising:

- rebuilt 4BD1T block (new pistons, rings, liners, bearings, camshaft, oil pump)
- new (early) head with rebuilt injectors
- new injection pump from a 4BD2TC
- rebuilt old-school Garrett VNT25 with a mechanical dual port (pressure / vacuum) VNT actuator.
- turbo pressure plate, new clutch and throwout bearing (may need a new spigot bush as well)
- little used LT95 TRB box with bottom mount PTO drive. Not sure of kms travelled, but TC appears to have very little visible wear.
- refurbished PTO winch and drive shaft assembly
- used 70A Hitachi alternator to upgrade my original 40-amper
- rear disc brake conversion bits
+ lots of not so interesting body & interior bits and pieces

Obligatory pics...

Block - top end

Bottom end


Head (anyone know if the numbers next to valve stems represent cast date?)

Being cleaned up

Injectors


Injection Pump




Turbo complete with early Chrysler T3 (TK100) mount. the turbo has the same 60 trim compressor as Garrett's T25 (39.8mm inducer and 51.4mm exducer), with a variable nozzle turbine housing (0.64 A/R, 52.7mm inducer and 46.2mm exducer). Hoping it will flow enough for ~200 hp with boost on tap from almost idle.




Garrett P/N plaque


LT95 box


PTO Drive


Things are starting to come together, so will be asking questions as I go along.

Cheers

Bojan

WOW! it just keeps getting better. Thats a parts list to make a lot of guys jealous. Should be a bloody good set up once done.

keep on truckin

Originally Posted by Sitec

I've not seen this thread before!! A very familiar vehicle!!! How'd ya go with those wheels?

lol... yeah, keeps disturbing the tranquillity at your place, hey?

Not too bad, the Compomotive centres are ready for soda blasting, but the chrome rims couldn't be restored economically (minimum cost of $250/rim) so I'm having it taken off & then sandblasted - will hopefully have them ready to paint by next weekend. Progress stalled last week - been called in to work a fair bit.

Have to take a few good pics next time I'm over and update my 90 build thread as well. These are the only ones I have at the moment.





Cheers

Bojan

Originally Posted by Offender90

...

Bottom end


Head (anyone know if the numbers next to valve stems represent cast date?)

...

Turbo complete with early Chrysler T3 (TK100) mount. the turbo has the same 60 trim compressor as Garrett's T25 (39.8mm inducer and 51.4mm exducer), with a variable nozzle turbine housing (0.64 A/R, 52.7mm inducer and 46.2mm exducer). Hoping it will flow enough for ~200 hp with boost on tap from almost idle.

...

Cheers

Bojan

I don't know about the cast numbers, but I know the date in permanent ink was marked on my head under one of the posts for the rocker shaft. In your pick I can see similar printing, so have a good look at that.

I'm going to hazard a guess that a compressor wheel with 40 mm inducer is not going to flow enough air and the 52 mm exducer will not give enough boost at reasonable efficiency for 200 HP, but that is simply my gut feel and may be wrong. You could always rebuild it with a larger wheel.

The vnt 25 turbo is ancient and a lot had been learnt about vnt design since then. While it works, any gt22 based vnt turbo will beat it for boost, power and economy.

You can get 200hp worth of air from the 51.4mm t25 compressor on our engines , but only just and as John said, it's not very efficient doing it.

Originally Posted by Bush65

I don't know about the cast numbers, but I know the date in permanent ink was marked on my head under one of the posts for the rocker shaft. In your pick I can see similar printing, so have a good look at that.

I'm going to hazard a guess that a compressor wheel with 40 mm inducer is not going to flow enough air and the 52 mm exducer will not give enough boost at reasonable efficiency for 200 HP, but that is simply my gut feel and may be wrong. You could always rebuild it with a larger wheel.

Thanks John,

I saw the writing, but couldn't make out a date - a few Japanese (Kana?) characters. I've blown it up as much as possible if someone else can make out a date.



The reason I asked about the castings is I have access to three heads at the moment, and all three have different numbers, corresponding to what could be YY M DD dates. See below

Unknown vintage head


Late 4BD1T head (skinny injectors) - numbers don't come up well, but from memory 89 8 17