Hey guys,
Thinking about the possibility of doing this. Does it seem doable? Im sure the main problems would be:
Mounts
engine-->gearbox connection
Sheer size

Anyone knowledgeable enough to tell me whether its doable or not?
Cheers

Possibly, anything is doable - as long as you start with rear drive 3.5L components. But it will be a long and expensive exercise, and you will not be able to put it on the road legally.

You will sink a lot of time and money into something that is dangerous to drive, handles like a pig, can't stop easily, and will be worth zilch when you finish. People will look at it and go "Why did he bother?"

lol As you can see, I don't think its a good idea.

Possibly, anything is doable - as long as you start with rear drive 3.5L components. But it will be a long and expensive exercise, and you will not be able to put it on the road legally.

ahah I dont doubt that it wont be legal ^^
The main thing im wondering (as it would be the biggest hassle) is will the gearbox of an astron bolt up to a 6g72/4?

No way. Wouldn't be strong enough anyway.

Don't ask yourself "HOW" at this stage, ask yourself "WHY" instead. lol

Fair point ^^ Was just something I was considering. Sure a tough astron box could handle ~100kw?

And why? RWD of course :)

Perhaps - if you really want to run around in a 1980's Sigma - consider a late Magna fuel injected 2.6 engine behind a Sigma 2.6 manual gearbox?

4x2 triton running gear.... see max not all are hard. People told me NO way man will u get a RB25det into a lil 83 Gazelle GUESS what i did nothing impossible and GUESS what the hardest thing was finding a engine, everything else was a piss easy will a bit of common sense and mechanical know how anything can be done. So u would need a 3.5 pajero or 3.8 pajero motor just for fun. The Triton box will fit as my neighbour fitted a 3.5 magna engine into his triton for a burnout ute took him a week to build it

OK. Triton or Pajero bits. I would prefer to keep a good 3.5L engine in a third gen Magna though. lol

it can be done. there was a sigma with a supercharged commodore v6 in it at the auctions in perth not to long ago. looked completely stock minus the rims, the perfect sleeper :D

in a sigma... why not a SR20DET. Great engine.

just keep an eye out at wreckers or auctions

Perhaps an sr20, but the mounts would definately be harder to make considering the astron mounts are close to the 3.5 mounts.

My best mate put a 308 in a sigma as a burnout car, actually handled quite well, so anythings possible, so yeah, 3.5 with Pajero/Triton gear would still be a killer combo.
Give it ago, at least you gave it try.

4g63t > sr20det.

I think it would be a lot easier to make engine mounts to suit than join an engine and gearbox that weren't meant to be.

Sounds great.
So early triton running gear will pretty much bolt on? with a couple of mods of course. that with a 6g of some sort would go well! Would definately do it in a wagon, gotta love them :)

Why not go 6G75? Might as well go the biggest lol

prriiicceee >.< too much for a 6g75 :\ compared to a 2/4

There's plenty of Astron 2.6 TURBO engines out there.

Not sure if the 2.6 Turbo (1982-90 Starion aparantly) was ever relased in AU. I thought there was a turbo Sigma but only 2L.

Either way, an aftermarket 2.6 Turbo was an obvious project & done many times.
And some of those were drag cars running high boost (eg ~30psi) - not sure what gearbox they would have used, but whatever it was, it was well over 100kW ATW.

IMO, generally gearboxes can take a LOT of power, they just can't handle sudden impacts. So no sidestepping the throttle or flat shifts :)

DON'T LISTEN to the naysayers, they are just jealous they didn't think of it first :P
Listen to the constructive criticism and be warned that there is probably more work involved than you initially think - if you aren't doing it yourself, this means budget lots more $, not that it's impossible.

Also, the bit about it not being able to stop? What a crock. Obviously with a significant engine upgrade you'd be upgrading the brakes (would have to to get it engineered). The end result is it would probably stop better than the modern factory magna because it's got less overall weight .

Oh, and read this (everyone) http://www.autospeed.com/cms/A_112157/article.html
:D

prriiicceee >.< too much for a 6g75 :\ compared to a 2/4

Hate to be the barer of bad news, but if you cannot afford the price difference of the 6g75, you cannot afford this project.

Otherwise, If the engine/gearbox will physically fit, your best bet would be to buy a panel damaged pajero/triton and steal the running gear out of that. You'd probably want the top end from a magna if it fits, tritons are typically geared towards low down torque.

http://www.carsales.com.au/Tig/UI/PagePopup.aspx?R=10065674&PhotoID=10342538&h_mid=4415219&f_mid=&c_mid=4414491&pid=140973&tabID=304744&autoplay=false

http://i253.photobucket.com/albums/hh59/magnabuff/10342519.jpg

looked like a holden v6 efi
big diff on the back
no other info

When I say I cant afford a 6g75, I mean I cant afford a 6g75 with everything else that will need to be done. Im talking an eventual project.
Also, That sigma looks nuts! :)

Seen one with a big V8 in it at the Gazzanats 2 years ago. Sounded AMAZING. Looked pretty damn awesome too with this huge chrome engine poking out the bonnet. bviously only used as a burnout car though lol

If you are building a burnout car obviously anything goes, I was thinking more along the lines he (the OP) was thinking of building a street legal daily driver. lol

MadMax has it in one :)
except, well, maybe not so legal lol

it can be done and legal, if your worried about the box get a station unit still a km152 just tougher and with a hydraulic clutch can handle big power,
also there was year the triton came out with the astron and the v6 which means the dimension as close and there would be factory mounts or whole crossmember, easy way would be to track down a whole drive line off a triton, and try to use as much OEM parts as you can it will make the engineers side off things much easier,
and as for the people saying it will handle like a pig the weight difference is minimal and this can be over come by setting the front end up right with proper suspension.
oh I have a worked scorpion and so I know a bit about it. the v6 conversion is something I have been thinking of for a very long time, head over to sigma-galant.com there is a few people
in the past talking about this very conversion.

I was SKR last friday and a guy came in with a white GJ sigma to show steve. It had just been freshly rebuilt with a LS2 chev and a big mother of a turbo mounted up high behind the left hand headlight, it was hooked up to a high stall convertor, tricked up auto trans and a modified 9" ford diff.

Apprently it pushing 600Kws (on 98 fuel) and with the reasonably narrow (10") rear tyres on it, it really has no hope of hooking up but damn did it sound tough and laid a mean skid when it left! lol

So that shows that anything is possible.... best thing was it was fully engineered and also RTA approved for road use in SA!

Sure a tough astron box could handle ~100kw?




not sure what gearbox they would have used, but whatever it was, it was well over 100kW ATW.

IMO, generally gearboxes can take a LOT of power, they just can't handle sudden impacts. So no sidestepping the throttle or flat shifts :)

D

Gearboxes can take as much power as you want, because power doesnt kill them - torque does.

you will need to source a 2WD V6 Triton gearbox for the conversion. a 4WD Triton / Pajero box will have the transfer case hanging off the back of the gearbox. this hangs down way too low and also means the gearshifters are too far back to be useful.

the V6 gearbox will bolt up to either 6G72 or 6G74 , maybe have different starter motors.