12a Into T-18

[Brendo]

in theory that would be all of it u would think... then u would need a custom tail shaft for mazda gear box to toyota diff. anyway u will find out lol

[Killswitch]

I remember finding a site where the conversion was shown in a bit of detail (12a into ke70) and the dude had to cut the transmission tunnel and re-weld it...

 

is it possible to do the conversion without doing this mutilation? Found a 12a 6port reaaaaaaaal cheap.

:lock:

[Des]

rx4 four speeds are nice and slim i don't think there would be any tunnel cutting.if you use a rx7 tranny or something a bit bigger tunnel mods will be needed.

also what sort of porting are looking at if any(go peripheral port)

Edited August 28, 2006 by too quick

[Killswitch]

How rare are the RX4 4 speeds? Would I pay through the nose for them? Wouldn't break it would I?

 

Currently not looking at porting really, just seeing if this is a doable project. A fresh 6-port 12a came up for sale for $100 with a spare motor with all ancilleries so very, very tempted to put that into my project car instead of rebuilding the 4K/5K. Cept I have all the required bits for a K motor. :lock:

 

Stock for they would easily keep up with a full house K-motor. Add exhaust and carbie and the 12a seems to be the victor.

 

Just worried about the driveline... diff etc.

 

Can see some change from $1500 though with this conversion.

Edited August 28, 2006 by Killswitch

[Des]

well ya can go hunting around some wreckers for an rx4 but i doubt you will find one.i found one for $280 going threw freinds of freinds of freinds.they can be rare in good condition.they seem to be pretty strong a mate has one behind a 13b j port and it gets a flogen, it holds up good.

 

for $100 take it even if you don't use, thats a bargain. :lock:

[Killswitch]

Cheers dude, yeah I think I'll buy it. bit pointless if I don't do anything with it though :lock:

 

Need T-18 Diff for it then ;)

[Brendo]

far out u will regret not buying that 12a if u don't.. just go buy it now!! i would, bargain!

[irokin]

I did a whole heap of research on rotors a while back and found a really good compilation of gearbox information. I'll try and find it again.

 

Edit:

And voila: http://ausrotary.dntinternet.com/forums/viewtopic.php?t=2735

 

Just gotta know where to look. Must have looked at that years ago now.

[Killswitch]

hahaha, actually was just looking at that now. :lock:

 

They say the steel case celica box (W50?) is a good street box... see, even mazda lads recognise toyotas prowess ;)

 

On that note, how hard are they to fit into a ke70? Because 12a adaptor plates are easy enough to find. :(

Edited August 28, 2006 by Killswitch

[Rolla__Boy]

I heard something about rotor boys using Corona 4 speeds behind 10 second 13B's...Not sure how true that is though

[scuba_steve86]

couldnt u just use the rx7 gearbox is this conversion gunna b worth it?

[toyrota]

don't waste you're time with a 12a, get a 13b. especialy if you're going n/a.

u'll want a series 4 RX7 turbo gearbox with an RX4 bellhousing.

These are a realy strong box and are fairly big but you wont break one.

you shouldn't need to cut you're firewall either. i didn't in my ke55 and you would think a t18 would have to have a bigger tunnel? you will probably need to cut a fair chunk out of you're x/member aswell to get the motor sitting a bit lower and further back.

[Killswitch]

don't waste you're time with a 12a, get a 13b. especialy if you're going n/a.

u'll want a series 4 RX7 turbo gearbox with an RX4 bellhousing.

These are a realy strong box and are fairly big but you wont break one.

you shouldn't need to cut you're firewall either. i didn't in my ke55 and you would think a t18 would have to have a bigger tunnel? you will probably need to cut a fair chunk out of you're x/member aswell to get the motor sitting a bit lower and further back.

 

How did you modify your cross member to get the engine to sit nice and low?

[scuba_steve86]

i heard 12a's arnt that bad of a motor. Whats actually involved in the process I'm thinking of putting the motor in a ke55 or ke35 something like that?

[toyrota]

You need to cut about 2 to 2-1/2 inches deep out of the x/member so the sump will clear.

and then put the strength back in with a few braces and some plate.

i'll try to find some photo's of mine when i made it and put them up.