2nd Generation Specific 1986-1992 Discussion

s4 engine in s5

Old 03-24-2014, 07:13 PM
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Default s4 engine in s5

So ill start off with what i have in front of me. I went and bought a 91 rx7 and was told all i had left to do is put the harness on as it had a rebuilt 13b pulled from another for a lsx swap. Got the car back and waited for the next morning. Next day i popped the hood to find a s4 motor. I didnt notice cuz the intake was still off when i saw the car. Now my deal is that i have a s4 and s5 intake and ecus. A chopped s4 motor harness and possibly missing parts of the ignition harness. Im thinking ill use the s4 housing with s5 intake. All emissions are blocked off as is the omp. Which is no big deal as i was going to premix like i did with my other ones. So now im debating options. From what i read the intake mod isnt hard and i am more than capable of doing it. Im just looking for a little feedback on what to do with the harness situation and what ill need to wire. Or if i should just go with a s5 harness with s5 lim and uim with s5 tb. Another issue is the cas as i cant find the plug for it. The last option is sell my motor and tranny and go buy a s5 turbo swap as i already have alot of turbo parts including a good tranny from my last car.
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