craigw1

Hi all

I have an 82 rex with 12A and nikki carb. Have found a complete motor/gearbox from a series 5 13b tii. Am not going to do the 'tii transplant' given (1) the costs of the whole conversion including microtech, etc. and (2) I don't have the gl-se so am not starting from the right base ie i'm going to have issues re the fueling, etc, etc.

So I've decided to do the following ; strip down and rebuild the 13b. have it street ported. then add 48 ida and a header. I have no idea how much power this should give me but I am expecting around 150kw

my questions as follows :

Can I mate this 13b motor direct to my 12a gearbox and just put my 12a clutch and flywheel onto the 13b or are these completely different and so therefore I have to in fact install the 13b turbo box with related modifications i've seen posted here, ie the tailpiece conversion and the modified driveline

As you know the 13b turbo has a different engine mount. Can I use my 12A front cover on this 13b ? or do I specifically need a gl-se front cover which i am going to have to import from one of you guys as i am in cape town.

also with the 13b the oil pan is different. again, what is the best way to solve this. I was thinking of going down to my local engineering workshop with the 13b and 12a sump and telling the guy to swop the rims. is this the best way to do it ?

finally, oil pick up. can i just swop the 12a for the 13b ?

no need to worry about omp as i will be running premix

thanks guys

Tanjo

The 12A tranny will bolt right up. You need a 13B flywheel, I dont think theres a diffrence in the clutches as far as 12A/13B goes, but there is a turbo/non turbo clutch. Id just get a clutch for the TII and use the 12A tranny. Yes you need a -SE front cover. The 13B oilpan will work. All this is coming from my NA 13B swap into a first gen, so a second opinion on all this would be good, but Im 99% sure on everything.

But, you dont need a standalone to do a TII swap. And installing a fue cell and running some lines isnt that hard or terribly expensive. Fuel pump, 100 bucks, same thing with regulator. Your going to spend more than 1000 bucks on the rebuild and port, and thats if you do it yourslef. Add in the weber and th header, and youve almost spent as much as the TII swap would cost. And, your going to have low compression rotors with the TII motor. Its going to be slow as hell NA. The hardest part is going to be wiring up the ECU.

craigw1

you're right about the tii rotors being lower compression. that had slipped me. suddenly i think i'm going to be reinventing the wheel here again

Tanjo

Seriously, just do the TII swap. That car would be REALLY fast. Does the motor NEED a rebuild? or could you get away with just throwing it in there?

REVHED

I've seen plenty of n/a ported TII motors with the low comp. rotors and they are anything but slow. Especially with a S5 engine as there is only a small difference in compression. The good thing about doing it like this is he can rebuild and port the engine properly and run it like that for a while until he has the funds to add the turbo gear.

If you want to keep the 12A box you won't be able to use the TII flywheel and clutch and you can't use the 12A flyhweel. You need to get a n/a lightened flywheel and clutch and use the automatic counterweight to suit the S5 engine. Personally I'd just use the S5 gearbox.

craigw1

just for the record guys ; compression on tii is 9.0:1 compression on n/a is 9.7:1
so it should b ok.

jason_child

go turbo or go home ............................enough said

craigw1

motor has been stripped down. one housing ok, the other is damaged but not too badly. I won't be taking a chance though so will replace this housing. side housings are ok and will be street ported. rotors, shaft all ok thank goodness. will be installing 2mm carbon seals. I've checked the posts on 2mm v 3mm and decided to go with the 2mm carbon ones. gsl-se oil pan and weber intake manifold on its way from mazdatrix, 48 ida from racing beat. have also spent some cash at victoria british on poly bushing set, tie rod ends, etc to spruce the handling up a little. I know turbo was the way to go but I'd have to cut a lot of corners given the budget constraints. This way my budget has been spent on rebuilding the motor, porting, and the 48 ida