Outer Limits 4x4 Board

ok so getting closer to a heart transplant for the wombat (1986 private import defender 90)

I have an engineer that will allow me to go to 5L, but more interested in going 5.7L (GenIII). not that keen on a 5L dunnydore donk, my mechanic tells me his stroked rover 3.9's (4.4-4.5L) will eat a 5L all day every day, mind you this is based on a race track in a Triumph TR7 against c'dores, etc - yes i know weight advantages, etc.

at this stage i'm thinking of rover and ZF - mainly for ease of install.

Does anyone know of any series/county/defender's in QLD that have a donk with greater displacement then 5L?

I Have heard i can apply to have e 'relaxation' but haven't looked into this yet.

I have also heard that the QLD DOT are changing the laws for engine swaps again in the next few months and my engineer doesn't know if they will increase or decrease the allowable displacement difference.

any help would be greatly appreciated!!!!

Cant comment on the QLD issues but I dont fancy the ZF lasting behind an LS1 without some serious upgrading. When I looked into it I found it was cheaper to drop in a toughened 4l60e than upgrade the ZF. Added bonus is it works off the LS1 computer.

If memory serves me correctly the standard torque rating of the ZF is less than 400NM. 4l60e isnt that much better but a heap cheaper to upgrade. If you insist on the ZF i think Castlemain Rodshop do an LS1 to ZF adapter.

cheers stuee,

mate if i went a GenIII i would be putting through a T700, not a ZF.

ZF only if i go a stroked rover

If you go with the rover i have a lowK ZF and LT230 Complete with shifters i will do you a deal on. I need some landscaping done

hey tony pm sent

Hey Sam
you should pop around some time and check
out the county 3.9 zf lt230

Harley

Why are you wanting so much HP? I think you will find a stock 3.9 in that 90 will be plenty.

thanks harley i will, been talking to mick about yours and will try and give you a bell next week in the arvo sometime if your free.

tony, i will want more then a stocko 3.9 in the wombat, have driven disco's with them and if i going to effort of all this i'd want something with more grunt, by the way the wombat weighs 2.2t dry

def90 wrote: by the way the wombat weighs 2.2t dry

You prob dont want to get it wet then

What is it for? Comp or just a toy? What has it got at present?

A 3.9 with lower gearing may be better than a 5.7 with taller gearing?

We all love more power but sometimes it can be too much for everything else. I would have thought a 3.9 in a 90 would be comparable to a 4.6 in a 110.

def90 wrote:thanks harley i will, been talking to mick about yours and will try and give you a bell next week in the arvo sometime if your free.

tony, i will want more then a stocko 3.9 in the wombat, have driven disco's with them and if i going to effort of all this i'd want something with more grunt, by the way the wombat weighs 2.2t dry

Sam - I drove a mate's V8 90 (stock disco 3.9) a while back. It is pretty much stock and probably very light - but this think had so much power you could spin all 4 wheels in 4th on WA pea gravel. It was like driving a rally car.

A new chip and few other mods to a stock 3.9 should more than compensate for your extra weight...

ISUZUROVER wrote:

def90 wrote:thanks harley i will, been talking to mick about yours and will try and give you a bell next week in the arvo sometime if your free.

tony, i will want more then a stocko 3.9 in the wombat, have driven disco's with them and if i going to effort of all this i'd want something with more grunt, by the way the wombat weighs 2.2t dry

Sam - I drove a mate's V8 90 (stock disco 3.9) a while back. It is pretty much stock and probably very light - but this think had so much power you could spin all 4 wheels in 4th on WA pea gravel. It was like driving a rally car.

A new chip and few other mods to a stock 3.9 should more than compensate for your extra weight...

Front, rear and centre diff locks in?

Otherwise just spinning the front

cloughy wrote:

ISUZUROVER wrote:

def90 wrote:thanks harley i will, been talking to mick about yours and will try and give you a bell next week in the arvo sometime if your free.

tony, i will want more then a stocko 3.9 in the wombat, have driven disco's with them and if i going to effort of all this i'd want something with more grunt, by the way the wombat weighs 2.2t dry

Sam - I drove a mate's V8 90 (stock disco 3.9) a while back. It is pretty much stock and probably very light - but this think had so much power you could spin all 4 wheels in 4th on WA pea gravel. It was like driving a rally car.

A new chip and few other mods to a stock 3.9 should more than compensate for your extra weight...

Front, rear and centre diff locks in?

Otherwise just spinning the front

Centre in, no front or rear. All 4 were definitely spinning.

You haven't driven on gravel until you have driven on WA pea gravel...

My 110 spins all 4 without difflock in river gravel, the RR auto wont spin them at all

The little 90 in heavier than my 110!

If you want or need power go the gen 3. I used to have a mild 4.6lt in my disco with 4.11s etc and nothing beats the gen 3 for brute horsepower

My 110 weighs in at 1920kg with fuel and two spares and is heavy for an offroad racer.

Cant help with engineering Im afraid. In WA you make your application before modifying and they say yes or no. I also had a precedent case to follow with another 110 with a 350 in it.

Note the 90 with the donavan is undrivable in the wet, awesome in the dunes but you cant drive it in the hills without huge wheelstands. Depends on what you want to use the car for in the end

My 110 spins all 4 on bitumen in the dry until the bloody Traction Control fawks things up

Much more fun in the rain 1st 2nd and 3rd All 4 spinning

Micka wrote:My 110 spins all 4 on bitumen in the dry until the bloody Traction Control fawks things up

Much more fun in the rain 1st 2nd and 3rd All 4 spinning

Dry asphalt? High range? Pfffft, vid or BS

thats may be the worst downfall of going V8, is i presume that the wombat will start to wheelstand, it is extremely hard to get the front to lift at the moment, but with a much lighter motor i figure it may start.

does the donovan 90 have pretty stiff springs?

running an auto?

some info on chev trans -LT230 conversions here
http://www.mez.co.uk/gearboxfaq.html

I spoke to an engineer in QLD recently about putting a 350 in my 110. The book says the max is 5.0 and he wasnt prepared to certify anything bigger.

Up to 5.7 is allowed in a RR - strange given the 110 has bigger brakes....

I will just keep the 4.3 stroker - it goes well enough. More power would always be nice but the handling and braking capabilities of the vehicle are probably at the safe limit now.......

What book might this be? I was told I could put a 350 in my 110 two years ago maybe the rules have changed I was also told that you can only double the capacity of the original engine which mine was a 2.5L which would make sense so Sam you could put a 8.0L in the wombat

Mark2 is correct.

I enquired 2-3 years ago about a 327 chev into my County. The engineer looked up a book to find that the 110 County could only be approved with a maximum of 5L engine whereas the RR could be approved with a 5.7L. Hence I installed a 307 instead.

Apparantly it had to do with what classification the vehicle was brought into the country under. The County came in under a different classification to the RR which allowed less tax to be applied to the vehicle. Unfortunately, when it came to Qld DOT rulings, they used these same classifications to differentiate between vehicle types and apparently this is why the County can only get a 5L motor. - So I was told.

Maybe the new NCOP will change this - once it is implemented in Qld.

Peter K.

i have another enginner looking into it, x-ing fingers!!

def90 wrote:i have another enginner looking into it, x-ing fingers!!

cough cough...

I know someone who bored a 307 block to 350 (stroke is the same, just bore is different)

It's not like anyone will pull the heads off to check...

ISUZUROVER wrote:

def90 wrote:i have another enginner looking into it, x-ing fingers!!

cough cough...

I know someone who bored a 307 block to 350 (stroke is the same, just bore is different)

It's not like anyone will pull the heads off to check...

He wants to use an LS1 not an LT1. The 307/350LT1 has a cast block the LS1 has an alloy block.

RUFF wrote:
He wants to use an LS1 not an LT1. The 307/350LT1 has a cast block the LS1 has an alloy block.

Thought of that after I posted... there goes that idea.

Hally wrote:What book might this be? I was told I could put a 350 in my 110 two years ago maybe the rules have changed I was also told that you can only double the capacity of the original engine which mine was a 2.5L which would make sense so Sam you could put a 8.0L in the wombat

The rules havent changed - yet. There is talk QLD will be adopting uniform national standards in which case they might. The 'book' is the Code of Practice for Light Vehicle Modification. It needs updating big time as the list of vehicles and max engine capacities is way out of date. Basically, if an engineer in QLD approves something outside whats on the list they are putting their a*s on the line big time. Its not worth it for a couple of hundred $$$. Typically we pay a lot less than southern states for mod plates, one of the reasons is our system is so prescriptive.

even with stroking a motor past the 5L mark, i want everything to be legal,

last thing you want is to be involved in a fatal crash one day and have my ass on the line due to wanting a bigger donk, there are alot simpler tests to do to check capacity then pulling the head off too, and its not like it would pass as a factory motor.

those tires don't look legal

haha, although its fully insured with them on, i usually run around town on 33 MTZ's.