Gj turbo build help

[pigdog85]

OK hey guys, well the misses decided she wanted to get done DUI and lose her license the other night so ive taken the gj and claimed it for my project the plan was just to build her a nice daily but she screwed that up so now the turbo build begins ..
OK this will be my first build and i really don't know too much but have plenty of time to figure it out.
so im looking at keeping it pretty simple just a slightly worked 2.6 turbo. for wknds and the occasional run down strip , so my first question(and there will be plenty) ive found a turbo kit but i have no idea if its any good, its an eBay job if someone could check it out and tell me what they think that would be great, im not looking at spending a fortune on the gj but i do understand things do cost money and some things you cant take the cheapest road.
heres the link:
http://www.ebay.com.au/itm/1978-1987-Mi ... 5191cbd23c

question 2: i would like to do some internal work on the motor before putting the turbo on , but again have no idea. i dont really want to spend more than $1000 on it, what would be the best things to do and roughly how much am i looking at? (i want to stay with a carby) im not even attempting efi yet.

so if anybody could help out that would be awesome im going to try and do as much work possible on the car myself and ill hit some mates up to lend a hand .
so yeah ill start with figuring out the turbo and engine first then ill come annoy you guys with the rest

cheers guys.
Dave.

[Superscan811]

...ive found a turbo kit but i have no idea if its any good, its an eBay job if someone could check it out and tell me what they think that would be great, im not looking at spending a fortune on the gj but i do understand things do cost money and some things you cant take the cheapest road.heres the link:1978-1987-Mitsubishi-Sigma-T3T4-Turbo-Charger-Kit...

Saw this kit quite a while a go and thought it looked "OK"

For a basic build I feel it would be fine, but I wouldn't expect to get more than 2 years life out of it (if treated hard, probably less) as a lot of the stuff is for "BLING" value rather than longevity.

question 2: i would like to do some internal work on the motor before putting the turbo on , but again have no idea.

On a budget and using LOW BOOST, the first thing to do is race prep the con rods and buy a set of ARP rod bolts and main studs, MINIMUM.....

After that you can think about a M7 head off a TR-TS magna, and possibly a set of ARP head studs if there is still enough cash left in your wallet..

The first 2 thing that will probably break in the GJ are the BW diff and/or gearbox, especially if you give it a hard time.

A GJ to GN Scorpion diff will be a direct bolt in and is a bit stronger.
The Starion gearbox (as long as your engine is a WIDE BLOCK) will bolt straight in BUT you need to convert to a hydraulic clutch. Not a difficult job as long as you have all the parts.
Another option would be a 2WD MJ Triton gearbox (2.6L Astron) which is cable, but you would either need to cut a larger hole in the floor as the gearstick position is 2-3 inches further forward, OR get hold of a jap gearbox extension housing off a GJ or later scorp and then swap it in.


Hope this gives you a bit of food for thought..

Cheers.

[turbosigma]

Stay away from that kit

Will you be taking it off the road? (As most that do give up and sell).

If I was doing it again - Get a Magna head - mod an intake - get efi up and running first.

Turbo is then just a exhaust manifold away - Keep an eye out for a sigma turbo mani or a US Starion mani - http://www.treadstoneperformance.com/pr ... o+Manifold See them cheaper than that on ebay. Both are cast - less likely to crack.

Turbo - get a Garret from Fred (Turbologic Warrawong) - enough said.

Vote the scorpion diff and jap box as well - unless - you get some extra cash for an r31 diff swap. As for the box, I would go for one of the slightly cheaper w55 or w57 Toyota box's.

Engine - Remove the balance shafts. Upgrade the valves (stainless steel) and maybe springs and as Superscan said ARP head studs.

Any more than that - A rebuild? ring/bearings - New pistons / prep rods. I would get a second block to do it all to. Its weekend swap when the time comes then.

Best of luck...

[pigdog85]

Hey cheers guys, i didn't think that turbo kit would be any good but was hopeful .

Will you be taking it off the road? (As most that do give up and sell).

yeah its off the road , but don't worry there's no hope of me giving up and selling , im too much of a stubborn prick for that to happen.

A GJ to GN Scorpion diff will be a direct bolt in and is a bit stronger.

when i grab the diff i need all the control arms and hand brake cable yeah?

As for the box, I would go for one of the slightly cheaper w55 or w57 Toyota box's.

will these fit my narrow block ? and will it bolt straight up or are there mods needed to be done? and how much should i be looking at paying for one(recon).
thanks again guys the help makes things so much easier .
oh turbosigma. do you know any guys around Wollongong that do good paint work for reasonable prices ?

cheers again

[turbosigma]

They fit both wide and narrow. Just need the bell to go with your own engine combo.

Dellow or one of billhincher bells - Bills are better - Dellow are local.
Lots of info here - http://www.sigma-galant.com/viewtopic.p ... ilit=supra
I paid $150 for my Box. (local pick-a-part just opened. Very lucky) Most go for 300 to 700. No idea on the cost of rebuilding one. But going on other box's starting at $500 and up.

Sorry, No on the paint. I just happened to know a panel beater / spray painter. Will be looking myself if he doesn't pull finger out soon.

[gmhighflow]

The Ebay link is set up for an engine already efi.
If you want to keep it carby you have two options. Draw through or blow through. Both can use the standard carby but they both need some fabrication to adapt. I prefer the draw through because of the simplicity in tuning but harder to attach to the turbo and you need the turbo to have a carbon front seal ,you also need the carby to be mounted solid to the front of the turbo. Blow through can be done with the carby in the standard position but mods have to be done to the carby float and breather so it is reliable and tune able. That will be the cheapest way and you can run an intercooler also.
If you can find an old factory sigma kit ,the whole setup is there for you, but a bit small for the 2.6 and the intake manifold flange will need some changes to fit the head if it is the different bolt pattern. It will be a good starting base setup for upgrading later.
The carby won't dissapoint in performance and efi is better but can be expensive as you probably know.
Unless you want a big power setup the gearbox and diff will handle it if your not dumping the clutch all the time. But the clutch may need upgrading. This is only for the base turbo setup with low boost and small turbo.
There are other bits needed also like fuel pump ,lower compression,oil drain in sump,gauges,exhaust. All adds to the expense.

Before someone says carbies aren't any good , I have turboed many draw through cars including astrons doing 11 second quarters in sigmas and my brother did 11.0's in a draw through 2lt escort street car (pinto) in the early ninties with a T04B and webber. EFI is good but can be out or reach from the average guy wanting something serious and doing it himself.

[robbert]

Just say he did buy this as reccomended earlier
http://www.treadstoneperformance.com/cart.phtml

What's a parts list for everything else he would need?

And can he put it on a standard engine or would he need to strengthen and decompress the engine.

I'm askIng because I am interested myself and have never learnt about turbo. I was leaning towards the sc14 because it could be bought and installed for $500ish. And to my knowledge, very easy to install.

[pigdog85]

Ok thanks for everybody helping its really made me think about which way to go,i have made a decision , that's kinda sad but smart i think, the misses really wants her car back and shes only lost the license for 6 months so im going to do a few things just not turbo, i will put a jap 5 speed in, scorpion diff , paint it, and do the interior and just make it a nice daily, ill be looking at doing a bit of work to the motor but nothing major , maybe just a good cam , weber carb, and maybe a few other bits n peices, i think being my first build it will keep things nice and simple so i can learn more along the way and then when its done ill be looking for a ge to do the turbo build and ill do it as a 5 year project and go all out for a nice wknd/strip car, but im sure i will still be needing help with this one as its all new to me, so ill keep u guys updated, atm the car is getting stripped down and getting ready for paint, ive got a freind of the family doing the job for me for a good price and hes going to teach me as he does it so that will be great .
ill keep you guys posted on how its going