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

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:

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, 200620 yr by too quick

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, 200620 yr by Killswitch

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:

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 ;)

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

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.

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, 200620 yr by Killswitch

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

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

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.

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?

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?

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.