Hey, I was just curious. How big or small is the timing from the S4 n/a and the S5 n/a. I found a motor that is street ported and basically rebuilt/built.

It's a s4/s5 hybrid. S5 rotors and balancing assembly. S4 keg. So when I run timing how would I go about the split difference, as I read it's a bit wider also. I plan on running a haltech, but use a TII map for reference and compensating the split. But eventually goes to 0.?

I really want to buy this motor, and not really have timing be a hassle. There is no s5 complete rebuilt/low miles n/a's around the area. This has my attention just for the fact it is high compression. (Last motor was stock s5 n/a-turbo, had a gt30 knock off with stock hotside. It pulled) Of course the deadly lean out... (Just because I took the silencer off and didn't pay attention to the wideband.)

But any hoot. Would there be that much of a difference in timing or no? I'm no expert in tuning, nor am I completely new. Any help would be greatly appreciated.

If anything I'll save my money for another forum members motor, another street ported one. t4 60trim is going on.

 

Well I'll just use use a s5 tii map and go from there then.

 

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/rotor-housings-fd-vs-s5-t2-vs-s4-t2-816116/

 

So what I'm reading is that it will make no difference. Sounds good to me.