Ok, I still am thinking about putting my extra S5 TII motor into my 79 rx7 would be sweet but have not made up my mind if I want it in my 76 repu.

Well, I do have one more question for those of you who have done it,
Does the TII accel cable hook up to the 1st gen pedal or did you have to fab it?
I would be using the S5TII harness and computer also.

Thanks

 

hooks right up..no rigging needed

 

Thanks for the info. Now to just decide which body to use and start the project.

 

Do it in the REPU!!!!!!! That would be *******!!

 

I was at Bandimere drag strip a few years ago for the import drags. This ratty old compact pickup pulled up to the line and I just laughed. Until he ran a 13 sec 1/4. Saw it in the lot later with the hood up, and a bag of ice cooling down the top mount of the TII engine, perfect sleeper.

 

Sounds like a sleeper. My truck would be quick with the TII motor and the 4:62 rear end.

 

that would be a beast. about how much do REPU's weigh though?

 

put it in the REPU and make it a TQ monster and use it to tow the 79! that's my dream. build a phat REPU and Use it to tow my 83

 

Curb weight was 2800


The repu already can haul a Fb easy. We have pulled a 16ft, and a 18ft trailer with fb's on the rear several times. The key to that is to have trailer brakes and a controller in the truck. The truck has no problem pulling it even my trailer ( 18ft dual axel heavy equipment flat bed tralier with the built on steel fold down ramps) it just don't have the braking power needed. We towed a FB from SC back to Nashville TN with no problems even over the mountains.
That 4 port is a monster and it is stock, never cracked open.

 

How about the other way - does the FB accel cable attach directly to the FC/FD throttle body?

 

Either way it would make one killer ride. My personal 2 cents would be the 79 Rx-7, though. I think it would be more fun that way.

 

The TII intake requires a long, wrap around throttle cable to get to the throttle arm.The stock TII cable fits the FB pedal/firewall like it belongs there,you can see it wrapping around the engine in this pic.On righthand drive cars,its very short,but on lefties,it has to cover some distance.....


A S5 engine swap is complicated by the electronic OMP if your going to retain the stock ECU.I had my front cover built up and machined to accept the larger S5 OMP,if you run a standalone ECU,then you can premix or run a S4 mechanical OMP.

 

A FB cable will work on a S4 NA as I know since my GSL-SE has the s4 uim and lim on it. But I am not sure about a s5 na since I never did that swap but it should work as well.
Like the man Steve said the S4,S5, and FD's TB are flipped so it needs to be pulled from the other direction so you will need the TII cable. Trust what he says as his car is already setup and is badass!

CHad

 

Steve,
Is this setup a true TII motor? If so did you have any turbo clearance issues with the FB frame? I will be running the HKS T04, HKS wastegate, and the HKS mani.
I ask this becasue I had it asked to me, but since my motor is not in I figured I would ask you.
Chad

 

Its a real 4 port S5 13BT.
I pulled it from the abused TII myself.Guy blew the original engine and turbo,then decided to go V-8 and make it a racecar.Got the whole thing for free for pulling it out.When Mazdatrix built it,they told me it had 3 shattered apex seals.New rotors,seals,rotor housings,streetport,oil/water jacket mods,lapped irons,used old E-shaft.
The turbo was no better,requiring a new shaft and bearings.I had it upped to a T04B compressor since Turbonetics was rebuilding it anyways.

The S4 turbo cleared the frame and idler arm easily,but was way to unstable above 12psi.The wastegate and manifold designs are a joke,I wonder if people who run them have even seen how much better the S5 turbo is,
The S5 turbo is VERY close to the idler arm,but it does clear.I would say its mandetory that you fab up a little heat sheild to prevent melting down the plastic idler arm bushings.I did this and it worked fine,but I switched to CP rack and pinion steering shortly after,so its a moot point in my case.
The stock S5 turbo/manifold is a jem and works great up to about 12psi,then the compressor runs out of huff.You can push it up to 14psi,but the intake temps will skyrocket.The stock dual wastegate is plenty capable.Mine controls 14psi with no issues and I have a much bigger,slower spinning compressor moving a lot more CFM of air than the stock T18 compressor.

 

Thanks steve that is what I needed to know. As soon as I get the S5TII front cover from the guy I bought the motor, ecu and harness from I will start asking shops around here to build me a 12a or a gsl-se front cover to look like the S%TII cover. I hope I can find a good shop to do it. I wonder what that will cost.
I would rather use a 12a cover seeing how I have tons of them but once I can really compare the 3 I will decide.
Thanks
Chad

 

It shouldnt be too costly.Theres not a whole lot of work to do,its just one corner that has to be built up,the rest is just drilling and tapping.If the shop is competent with a TIG welder,and their cleaning prep is thourough,there should be no problems.Mine cost 175 bucks and I waited a week for it.
Just be sure you provide them with the S5 cover for refference,the S5 OMP for test fitting,and obviously the SE cover to make the mods to.....