Kingabe

Right, I've searched a bit and I can't seem to find anything. Obviously found a lot about 2.9 conversions, but not into a 3door. I've got a base model 1.6 Sierra 3 door. Just picked up a BOA with mt75 box. It's from a Scorpio that was converted, and the whole cars available.


What do I need apart from engine, box, loom, ecu?
Does anyone know about the prop lengths? Id imagine it's too long.
( just be told the 3door and saph are the same wheel base �� )
Obviously a fuel tank and pump.
Is there anything obvious that I should know about?

Cheers
Stuart

Marc sierra

iTrader: (1)

The wheel base is the same for all Sierras. If you have a MT75 to go behind the 24v, you can simply use the prop from a Sierra 2.0 DOHC. You will also need all the hoses for the cooling system, the PAS pump and piping (and perhaps steering rack). If the Sierra is an mk1, you might also need the front subframe, as that could be different as well. I would also take the exhaust to make it fit to the Sierra.

R4N SS

iTrader: (6)

you can use a 2wd cossie subframe as thats what i have in the 3dr.

you will need to space the gearbox depending on what tunnel the car has but it will still fit if small tunnel shell

Marc sierra

iTrader: (1)

The subframe on the Granada Scorpio is exactly the same as a 2wd Cosworth. I would also get the complete rear suspension and brakes from the Granada. It has an lsd standard and Sierra Cosworth size brakes.

dojj

iTrader: (3)

if the whole car is available then simply unbolt the engine crossmember, gearbox crossmember and rear axle

other than the prop needed to be changed as it's longer and the tca's the rest is a bolt in replacement

you will need to find some sierra v6 springs to handle the extra weight and use some 4wd struts to go with it as the hubs will be bigger from the granada (which means you can keep the 5 stud wheels and brakes and all that stuff that goes with it) just don't use the granada stuff as it will push the car into the roof of the garage and you won't need a jack to change the oil, been there done that

make sure you keep the steering stuff too, there were several different intermediate shaft lengths depending on the engine, power steering, 4wd etc so don't bin anything

Kingabe

Thanks for the advice. I've got the whole car avaliable so i will just park them side by side. It is a mk1 Sierra, I don't really want to go 5 stud and it's already got coilovers on. I'll source a 2wd prop. Can I not use xr4i engine mounts on the Sierra sub frame?

dojj

iTrader: (3)

Use the stuff that comes with the car as they can vary from year to year and engine to engine

Otherwise the rest is easy

R4N SS

iTrader: (6)

i have had to buy the uprated 2wd engine mounts as have a 2wd crossmember

dojj

iTrader: (3)

The early cars used the bolt in ones and after that they used the spindle ones and only the 4wd cars used the bolt in versions

Jack and the Beanstalk

Nice Thread Kingabe, I'll be interested to learn from as I am too collecting parts at this stage to do a 2.9 v6 BOB 4x4 conversion on my sapph

Hi Dojj, what do you mean by 4wd struts, is that part of the shocks or are you referring to the strut housings that is part of the body where the shocks fit into? If we use coil overs, do you still need the 4wd strut setup?

Cheers

dojj

iTrader: (3)

the 4wd cars use a thicker strut than the 2wd cars, and therefore the hubs have a bigger hole in them

you can make the 2wd stuff fit the 4wd hubs by sleeving them down but not the other way around

the 4wd struts might also be thicker because they need to handle the extra loads the 4wd system puts on them, but for reference the granadas also used the thicker struts so i think it's more of a thing that people make out

if you are going to be using the V6 there are a lot of suspension things you need to consider, but namely that the extra weight is not just a lb/in load on the springs, fitting 115 lb/in instead of 105 lb/in springs is just the rate, not the static weight of the engine being lots heavier

example being that putting standard 4wd cossie springs in will lower the car by 2 inches because they can't handle the weight even though they are rated at a higher capacity

which is why you might need to experiment first