drakesword

So i blew the oil control rings or more in the front rotor of my 91 13b. Found a post on craigslist for a complete 87 rx7 with a 13b with rear rotor problems.

Could I in theory take the front rotor and such from the second engine and replace the rotor and such on my 13b? What other parts would be needed? I assume the soft seals you replace when you tear an engine down regardless but is there anything else?

rx-7 obsessed

well in short ....no.... the 87 motor has different compression rotors, the housings are different. if anything was out of spec say a rotor housing you could not just swap s4 for s5 rotors/housings and vice versa.

w.sen

iTrader: (8)

+ 1 bad Idea

S4 is 9.4 to 1 compression

S5 is 9.7 to 1 compression

And if I'm not mistaken the s5 rotors are half a pound lighter than s4 rotors.

drakesword

dually noted. Thanks