wam

ok here it is, somone gave me a 72 ford couriour truck today in great condition! no rust and no dents! but anyways, its got that old mazda 4cylinder engine thats blowed up.. so what i wanted to know is how hard is it to put (and what should i put in it) a carb 12a or a egi 13b?? what about the tranny will i use one off of a 7 and what year, or do i use the stock 4speed out of the truck itself... i want to do this project and have it done by the end of summer, so will i have the problems with the mounts or what do i need to do??? ill really thank you for your input, and what other stuff do i need to know..thanx

rxtasy3

iTrader: (2)

That tranny wont bolt up to a rotary, u'll have to use one from a 7. U'll also have to have some welding done since it will need the mount for a rotary welded in. Drill the spot welds for the 4 cyl engine mounts to remove them. The wiring for EGI engine is another issue, unless u know a good bit about wiring. U might want to stick with a carbed engine. I don't know if those trucks used a clutch cable or hydrolic.

rxrotary2_7

ooohhhh! a ford couriour truck! nice find!

wam

hmmm thanx for input..you know i really dont know what kind of clutch it has?? yea i know a little about wiring for the egi. hmmm i do have more spare 12a engines. but i like the idea of egi... the computor hookup will be the worst! witch engine would be the easiest to put in that truck (mount wise)? thanx again

rxtasy3

iTrader: (2)

One isn't going to be easier than the other, the easiest will be to use a carb rather than FI. Look under the hood for a smaller master cyl attached to the firewall next to the brake master cyl.

wam

ill be getting the truck in this week...would the 12a have enough power to be in that truck?

wam

oo yea i guess what i was trying to ask is, would the motor mounts from a fist gen rx7 be easier to mount than a 2nd gen rx7... you know because the location of the mounts? didi say that right?

Jeff20B

iTrader: (13)

1st gen mounts should be easier. Carbs are easier. A 12A should have enough power for pretty much anything the truck's chassis could handle, such as towing and hauling stuff. Remember, this is a 4 boinger truck. Only the true REPU had upgraded brakes and all the rest to handle heavier loads. But then again, a carbed 4 port 13B like what the REPUs had is also a nice engine to use with nearly the same HP and a little more torque.

wam

well what maybe about the 13b with 1st gem mounts like off of gsl-se, and carb it?? i really would rather have a repu, but thats is VERY unlikely and VERY impossiable in north carolina..so this is the next best thing i can do!

Jeff20B

iTrader: (13)

You could build a 4 port 13B with 12A side plates and GSL-SE rotor housings and carb it. Just pop out the 12A stationary gears and install 13B ones from any '76 to GSL-SE or later 13B. If you don't, they'll be like 5mm short in the 13B's rotors' gears. Were you gonna run a RB Holley or stock Mazda carb?

wam

it would be stock nikki, but wow hmm take 2 engines and make one? never heard of that!

Wankelguy

I'd just put a 4-port 13B in it like REPUs came with.
Or a GSL-SE motor converted to carburetion. You can use a '79-'80 RX7 tranny, or any pre-RX7 ribcase. The REPUs also used a 33lb flywheel with a 9-bolt clutch, rather than the 30lb. 6-bolt clutch flywheel used on the old RX4 4-port motors.
I'm going over to my friend's house today, and he has 3 REPUs, I'll take a look at the engine mounts and see what the deal is.

Jeff20B

iTrader: (13)

I've got a '79-'80 tranny in mine. It's a great daily driver tranny because the gear ratios are close together. They all seem to drop the RPM about the same amount. A ribcase has 1st and 2nd closer together, and 3rd is really far. I guess it makes towing easier. I had trouble towing up a hill in 2nd gear, but 1st was great. If 2nd was a little closer to 1st, like a ribcase, I would have had no problems. Something to think about. I'm also getting a ribcase soon.

wam

thanx wankelguy and jeff20b, im wanting to use some parts that i allready have in stock. i have 1 79 5speed tranny left and i have no gsl-se engines that im not useing, but i do have some 12a's and ill be useing one of those for now! i know im going to have to rig up some tranny mounts, but will the tunnel have to be modified any, or will there be enough room for the rx7 tranny to fit in?? thanx your help means a lot to me!

wam

i really dont see how the rotor motor will fit this truck..because the crossmember looks like its part of suspension and steering..looks like the oil pan will be in the way!! hmm i must be misssing something!