RX7 allnight

so i need to swap oil pan from 4port 13b to s5 as well front cover install a high pressure fuel pump. is the 4port 13b the same length as the s5? will i have mount issues? what should i do about OMP. block it off premix? could i install the eletronic OMP on the older 13b front cover?

Latin270

So your putting an s5 into you repu? As for as lenth yes they are the same length. Blocking off the OMP is always easier than trying to modify something that "could" work.
Again if your swaping the s5 into your repu than. repu oil pan, repu front cover and if you plan on using a carb than obviously an intake manifold and distributor. Thats about it. I did a similar swap on my Fb w/ an s5 motor and she ran like a bat outta hell!

RX7 allnight

yup s5 efi into my repu, s5 motor built by rx7.com tII housings street port extrude and honed intake super afc tuned true dual racing beat header should be fun!

scrip7

iTrader: (6)

Post up some pics!....Repus are da shizzzznet!

RX7 allnight

can i use the flywheel from the 74 repu on the s5 motor? also. does the s5 motor go into limp mode when the OMP is blocked off?

RX7 allnight

scrip7

iTrader: (6)

The rule of thumb is to always use the flywheel and counterweight for the rotors that are being used, so yes s5 flywheel and front counterweight. The flywheel also has the rear counterweight "built in" to it, to keep everything balanced. And yes limp mode without OMP. I would recommend going full standalone such as Megasquirt. The stock ECU mapping is towards the rich side and only moderate spark advance and your s5 would run better and get better mileage with a standalone. My .02c and BTW, that intake looks damn good! Where did you find your Repu and may I ask what you had to shell out for it???

RX7 allnight

ive been after this repu for some time, 3 years i think? each year he wanted to fix it up but never went around to it finally i went to his house on my birthday. gave him 1,500.00 cash for a non-running repu. got it to my house and it started after a few hours it has blown oil rings so it smokes (alot) bought this s5 with tII housings big street port super AFC tuned and built by rx7.com also has a extruded and honed intake as u can see

RX7 allnight

so all stock flywheels come with the counter weights built in correct? thats why when ever i pull off a flywheel its just the flywheel. so the front counter weights go with the flywheels unless your using a light weght flywheel than you need a rear counter weight as well correct?

RX7 allnight

i dont have the s5 flywheel, just the front and rear counter weights for the s5, what should i do? any options besides getting a s5 flywheel or using a light weight flywheel with counter weight?

Latin270

You need to use an s5 flywheel. You shouldnt have a problem finding one but if you do I got one here somewhere.

RX7 allnight

so now i need to go fetch a s5 flywheel and starter, i guess pick-n-pull here i come~!~ darn and they just had their 50% sale i also need a efi fuel pump anything else?