Rebuilt TB42 with Turbo and intercooler or Chev Gen III V8

[LOCKY]

The US Chevs are a different kettle of fish. We run a steel bottom end 5.3 in a TJ. Great engine. Also looking at bringing in some 6.0 ones.

Alan Mac seemed to do alright in 2002 OBC with it.

[getdirty]

I have a feeling the ECU would need some input from the auto trans so there would be some tweaking to do there, too - the motor has variable cam timing and shit like that so it would probably be necessary to use the stock ECU.

I am pretty sure sandy & co used an aftermarket computer to get around the no gearbox signals thing.. VVT shouldn't be a problem for any of the newer systems..

Nope standard computer without speed sensor input.......

[getdirty]

I want 220kw plus at the rears.

Are you sure!?!?!?!?!?! That much power in a 4wd, particularly a SWB GQ would be near uncontrollable!

Not to mention that with drivetrain losses and tyre size in a 4WD the actual flywheel output would need to be huge!

Also consider that having that much power under your right foot certainly won't help traction off road.

I would also advise against a turbo motor offroad...... I know many others would disagree but I've been in both...... first of all a turbo has low compression therefore shit engine braking, secondly turbo lag, the power comes on hard and can cause all wheels to suddenly start spinning and lose all momentum - i've seen it happen!

[chimpboy]

I would also advise against a turbo motor offroad...... I know many others would disagree but I've been in both...... first of all a turbo has low compression therefore shit engine braking, secondly turbo lag, the power comes on hard and can cause all wheels to suddenly start spinning and lose all momentum - i've seen it happen!

Yeah I've always wondered why people would want turbo off-road.

Turbocharged motors also run hotter, which increases the risk of damage when water or watery mud splash up onto a metal bit, and they deliver the extra power in the wrong section of the rev meter.

VH45 = good swap without turbo.

Jason

[Wendle]

Yeah I've always wondered why people would want turbo off-road.

Turbocharged motors also run hotter, which increases the risk of damage when water or watery mud splash up onto a metal bit, and they deliver the extra power in the wrong section of the rev meter.

VH45 = good swap without turbo.

Jason

you have to build manifolds anyway, so whacking a turbo on each side isn't really much extra drama.
Hazards offroad is done at around 150-200kmh, so turbo's are pretty useful..

[Edward]

OK after looking into all the cost/reliability and suitability in doing all the above conversions etc I have decided to go with having the existing TB42 rebuilt and blueprinted, get it decompressed to 7.7:1 ish add a Garret T3/T4 Turbo and intercooler plus a 3" mandrel bent exhuast. Reason being to do the VH45 is going to cost between 14k and 16k to do properly with twin turbo's, aftermarket ecu, custom bellhousing, wiring loom, air box, engine mounts etc. The Gen 3 is just to much of a reliability concern and is still an expensive conversion when a very low Gen 3 is about 7k to start with. The TB42 has infinit parts availability and the full rebuild, blueprinting, port and polish, Garret T3/T4 turbo, custom manifold, adjustable boost control, turbo blow off valve, custom airbox, dual alloy snorkels, 3" mandrel bent exhuast, custom intercooler is going to run me about 7k drive in drive out and far fewer hassles than duing a conversion. Also thinking of doing the outback challenge in the touring class and this engine I am pretty sure would still fit within the touring class rules.

[turps]

. Also thinking of doing the outback challenge in the touring class and this engine I am pretty sure would still fit within the touring class rules.

Turbo Diesels are allowed in the touring class, but turbo Petrols arn't. As a turbo diesel just balances the power between the 2, where as turbo petrol just destroys it for grunt. For the same reason petrol V8 conversion are not allowed in touring class.

[chimpboy]

OK after looking into all the cost/reliability and suitability in doing all the above conversions etc I have decided to go with having the existing TB42 rebuilt and blueprinted, get it decompressed to 7.7:1 ish add a Garret T3/T4 Turbo and intercooler plus a 3" mandrel bent exhuast. Reason being to do the VH45 is going to cost between 14k and 16k to do properly with twin turbo's, aftermarket ecu, custom bellhousing, wiring loom, air box, engine mounts etc. The Gen 3 is just to much of a reliability concern and is still an expensive conversion when a very low Gen 3 is about 7k to start with. The TB42 has infinit parts availability and the full rebuild, blueprinting, port and polish, Garret T3/T4 turbo, custom manifold, adjustable boost control, turbo blow off valve, custom airbox, dual alloy snorkels, 3" mandrel bent exhuast, custom intercooler is going to run me about 7k drive in drive out and far fewer hassles than duing a conversion. Also thinking of doing the outback challenge in the touring class and this engine I am pretty sure would still fit within the touring class rules.

Just resurrecting this thread as I want to be sure we get updated on your progress.

Jason

[bru21]

have you considered the new 8 ltr chev. big kwt's. the bigger the motor the less it will hurt the give you the 4 wheel fire you want!!

i have a tb42 in mine and am considering a lt1 corvette inj motor. they are around $1990 4 a good runner complete with all access. plus bellhousing exhaust etc, should come in at less than $3500 once you have sold your old motor.

i had one of the carbie lt1's in my old bundera - nice and legal. good strong motor and 3-400 hp is not an issue. i found it being a swb with lift, lock rite and no sways a bastard to drive, crossing up shorty's will lead to rolls eventually

i think turbo is not the way to go.

winch challange deisels are not hard to beat with a chevy. keep it simple and refine the package with the spare $$$$$

cheers justin

[ORSM45]

ive beaten a turbo intercooled 4.2 diesel that competed in the winch challenge a few times. in about 50m i was about 10 meters in front and flying away from him.

i think you wont want anymore than 180rwkw. if you just wanna brag about having 220rwkw and all that, its not worth it. you talk about reliability issues. well when running 220rwkw it starts becoming a reliability issue. a mate of mine had 150rwkw in his swb 40. he popped the front wheels off the ground regularly.

id go the VH45 with no turbos. you can crank them up good enough without turbos. i bet a 200rwkw vh45 without turbos would cost roughly 7k too. and it would sound way better.

MaccA

[chimpboy]

...once you have sold your old motor.

Hahahahahahahahahaha.

[fatassgq]

ive beaten a turbo intercooled 4.2 diesel that competed in the winch challenge a few times. in about 50m i was about 10 meters in front and flying away from him.

I really think that even a full on modded turbo diesel is never going to be a speed machine in relation to a petrol v8.
But the diesel is and never will be about full on top speed etc. A diesel offers many other traits that you just cant go past for a daily driven or even a weekend warrior as far as reliability, long service life (if looked after) simplicity and low down torque and fuel economy. Don't get me wrong I don't think I will ever be able to afford getting one rebuilt though!! Competition vehicles are a different ball game.

Really depends on what you want to do with the truck. IMO if you want a daily driver that will still push you along at a reasonable pace without killing you every second day you have to fill the tank.... Diesel is not so bad. Turbos should be compulsary on em though!!!!
Plus the older ones only need 12 volt power and you are away not all the electrical stuff to get drowned and bring you to a stop.

[Edward]

The truck is not a daily driver, I only use it for fun on weekends and want to compete in the extreme winch challenge series next year. I don't think a diesel has ever won a round of the winch challenge or the outback challenge or rainforest challenge so I think that a petrol is established as the best way to go for these types of events. Fuel consumption is not a huge factor, more interested in power to weight and being able to hole shot out of a gated start on a special stage. Top speed only needs to be about 140km but must be able to be there in hurry.

[turps]

The truck is not a daily driver, I only use it for fun on weekends and want to compete in the extreme winch challenge series next year. I don't think a diesel has ever won a round of the winch challenge or the outback challenge or rainforest challenge so I think that a petrol is established as the best way to go for these types of events. Fuel consumption is not a huge factor, more interested in power to weight and being able to hole shot out of a gated start on a special stage. Top speed only needs to be about 140km but must be able to be there in hurry.

Trent Lean has won stages/events in all the comps you listed and some of those where before he cut the grill out and put on the biggest intercooler he could find.

[bogged]

Trent Lean has won stages/events in all the comps you listed and some of those where before he cut the grill out and put on the biggest intercooler he could find.

apparently they are around $1800 drive away them intercoolers.

[Edward]

Sorry I was not aware that Trent Lean had won the Outback Challenge driving a diesel, what year was that? And I didn't know that he had won an Australian Extreme Winch Challenge event driving a diesel either, just showing my ignorance I suppose. But it just shows that the exception proves the rule. Most of these events by far have been won by petrol vehicles. In motorsport I don't think a diesel has beaten a petrol in any formula except maybe truck racing. BMW ran a TD in the Paris dakar this year that performed reasonably well but was still spanked even with their huge mega buck win at all cost budget.

[bogged]

In motorsport I don't think a diesel has beaten a petrol in any formula except maybe truck racing.

Bzzzzzzzzzzzzzzzzzz.
BMW diesel won Le Mans 24hour race..

[turps]

Sorry I was not aware that Trent Lean had won the Outback Challenge driving a diesel, what year was that? And I didn't know that he had won an Australian Extreme Winch Challenge event driving a diesel either, just showing my ignorance I suppose. But it just shows that the exception proves the rule. Most of these events by far have been won by petrol vehicles. In motorsport I don't think a diesel has beaten a petrol in any formula except maybe truck racing. BMW ran a TD in the Paris dakar this year that performed reasonably well but was still spanked even with their huge mega buck win at all cost budget.

The OBC was the 2nd 99, 1st2000. Rainforest 1st 99, Ateco (winch challenge vic) 1st 2000 (I think). And one of the early xtreme winch challenge he won also.
But you are right there are alot of more powerful cars competing these days than back then.
For example early atecos most cars where only running 33's, now they all run atleast 35" tyres unless there a zook.
99 OBC first 2 places where running 33"swampers, so times have changed.
For winch challenge type events it is more about being consistent, good team work and good winch use as opposed to out right hp.
But it does help.

[hazard]

Just fit a VH45. They are heaps lighter than a 4.2 especially with an auto behind them, they are have variable cam timing etc to give you a flatter torque curve and throttle response, they are unbreakable with 6 bolt mains and a strengthening cradle (I have been reving mine to 7800 everywhere I go) and cheap. The conversion isn't that hard - they do fit and the wiring is pretty easy.

An early VH45 is rated at 280fhp @ 6000 but with a exhaust and air filter and fiddling the MAF sensor you get an easy 338fhp. The later model versions have 340fhp and come with titanium valves etc as standard.

The next best option in my opinion would be to twin turbo the 4.2 leaving the compression standard. Turbo size and cam selection will taylor the torque and power curves to your driving style.

Either way you will get enough grunt to have some fun and start break things. I went for the VH45 option and the thing is awesome!

Did I mention that I have a few in stock?

[chimpboy]

Just fit a VH45.

<snip>

Did I mention that I have a few in stock?

Goodo... but do you have a gearbox adaptor and driveshafts in stock too?

Can't drive an auto or my latent homosexuality may finally break free, so it's got to be mated up to the manual box.

Engine mounts, manifolds, etc, etc... If you were able to make these available, you'd sell a LOT of VH45s...

Jason

[hazard]

The only parts you would need is the bellhousing kit, one engine bracket (the standard engine mounts are retained but I put a limiter on them), brackets to remount the power steer and a/c and the exhaust manifolds. I am looking at doing a kit at the moment with a cast bellhousing which would leave the gearbox (and driveshafts) in the same position.

If you wanted a turbo VH45 and a manual, you would need a really good rev limiter because it is hard to change gears fast enough... (unless you are used to that type of repetitive action on your stick )

[maty]

why not V8 turbo diesel - best of both worlds?

[bogged]

why not V8 turbo diesel - best of both worlds?

cost

[fatassgq]

Just wanted to bump this thread up as I now have keen interest!!

Have narrowed my choices down to these and would like some opinions if possible....

1) Older style 350 chev with either tbi or tpi injection. Prolly tbi for simplicity.
Pros: Can get adaptor from marks to bolt up to my manual tranny, Reasonably easy to get parts for (but I have been told otherwise too)
Can get aftermarket computer to run with manual, Good cubes etc.
Cons: I don't know enough about em to know what heads and configerations etc work and what have problems. Not sure if I have to run auto box. Not sure how complex computer is but am sure it is no worse than holden commo's

2)Gen 3
Pros: Cool factor, cubes, possibility to get heaps of power later on. Huge range of parts etc locally and a fair amount of knowledge on the motor itself.
Cons: Serious concerns regarding electrical side of things setting them up. There is no kit from marks for all the bcm and other shit. Can imagine things adding up very quickly.

VH45 sounds ok but lack of aftermarket support and kit to do conversion and main concern is torque production down low. I have a heavy car.
For the same reason I am a little shy about 304 holden motors too.

Keep the comments flowing

Brian

[bubs]

Toyota 1UZ-FE V8 4L Quad Cam 180rwkw under 10 G for the swap

[grazza]

My 1UZ-FE Toyota V8 in the GQ shorty is getting close...
Good value - half-cut $1800 (can be got cheaper)
The guy who is doing the conversion may be selling the adaptor plates soon to use the Nissan 5-speed (after he has got a template from mine)

The project is taking longer than expected but it should not be too much longer....

Parts availability good compared to Nissan VH45.

[GQ TROL]

3rd option......VK56?? C'mon, its only money!

[TUFFRANGIE]

i know a guy with a chev 5.3 in his shorty GQ it has 220kw of fun at the rear wheels running 35's

[morkz]

i know a guy with a chev 5.3 in his shorty GQ it has 220kw of fun at the rear wheels running 35's

hey would that be rohans SWB? cruising around the lillydale area?

I heard cavehill built his motor lots of $$$ money in that

[bogged]

i know a guy with a chev 5.3 in his shorty GQ it has 220kw of fun at the rear wheels running 35's

Theres dudes with hot TB42's and TD42's doing that to 35's as well...