It runs well but damn is it smoky. I'm about 95% certain it's burning oil due to age. I assume the oil control o-rings. The odometer has 213k (not currently working) and I assume it's the original engine. I have only owned the car one month. It does pull reasonably well but the smoke is a bit out of hand. I added 20w-50 and some Lucas Oil Stabilizer a couple days ago but so far I see no improvent. Since I feel I will be able to locate a used s4 13b with relatively low miles easier than a replacement gsl-se 13b I may go that route. I doubt the se's rotor housings, etc. will be in the best shape considering the mileage.

I have searched a bit but so far haven't found an answer to my question:

Is there any reason I couldn't take the s4 short block and run it with the se's ecu? I understand the intake manifolds are different. Perhaps I can adapt the se's manifolds to work and run the two 680cc injectors. I don't mind fabrication if that's what it takes. Any problem with using the se's distributor? I would use the se oil pan and front cover of course. Am I overlooking something important?

 

Added:

I located this info on the "other" forum posted by RX-7Doctor:



"1. You can install the FC engine and find all of the SE injection stuff including the AFM, upper and lower intakes, etc and install them on the S4 engine. You would then run the stock SE ECU."



Apparently I would also need the fc flywheel. I didn't see the distributor mentioned but I assume it would be utilized???

 

he's kinda right...



buch of ways to do the swap.



easy: strip s4/s5 engine to the block, put all of the gsl-se stuff on top of it. you run the -se ignition, intakes, water pump etc. the FC engine keeps the FC flywheel. its all 100% bolt in this way. FC exhaust manifold is better than the se, as its like 2" instead of 1.75"



CAR WILL NEVER EVER NEVER PASS SMOG WITH AN S4 ENGINE THIS WAY! the air injection ports are different on the S4. S5 is the same as the SE, and will have no problem



FC water pump/air pump doesnt really fit with the SE intakes, so its just easier to use the SE stuff



car runs great, FC ports are larger, so it makes more power



Harder: like the easy way, but use the FC intake. you need to plug 2 injector holes in the manifold, and adapt the SE air flow meter to the 4" pipe (FC AFM is not compatible with the SE electrics.) there is probably a couple of little things i'm forgetting but its easy. this is the only way to make the S4 pass smog



even harder: do the hard setup with a megasquirt or something



even harder: use the factory FC ecu

 

I really appreciate all the info! I don't have to worry about smog testing where I live so that's a plus in this situation. The car does have a Racing Beat header and pre-silencer so hopefully that will swap as well.



My other option since I have most of the parts already would be to attempt the fuel injected 12a setup utilizing the se intake components, etc. and I suppose the 13b's intermediate housing. I would also streetport the 12a housings since they are already scribed and ready for porting. Do you think it would run well with the se's ecu? I would probably end up fabbing a lower intake manifold to mate to the se's upper intake. I kinda wish to take the cheapest route since I have two other rx7 projects that take precedence. I guess I would also have to somehow modify the racing beat header to fit the 12a if I pick this path.

 

ive always thought the SE intake stuff would work great on a 12A... RB used to have a lower intake that would fit



although i have never done it