kurtoli2

This is a long post, but bear with me.

I have a 1985 GSL-SE that uses the 6 port RE-EGI.
My rebuild of the original motor just didn't work. I abandoned that build, but might try again using the original irons and some pre-83 housings that are in perfect condition and they've been semi-PPéd. But that's a different story.
Where I'm at today is this:
I bought an unassembled motor from a race shop in Houston. It's from 1991 and uses the S5 rotors. They did a full BP on it, and machined the rotors. It's also balanced. Every part is in like-new condition. They only sold me the short block, and like I said I had to assemble it myself and order some items specific to that motor like, oil pump and gear, temp sender, and so on.

I did a good job assembling it, in my opinion. Before I started bolting components to it I used the gauge made specifically to check water pressure and it held steady at 25psi for an hour, so I concluded my seals were good. I also made sure the motor turned freely without any binding, and I got a compression 'pop' 6 times in a row when I hand cranked it.
Satisfied all was fine I started bolting all the stuff from my 85 on; exhaust manifold, intake, etc. Everything is stock, incl the fuel injection using brand new 650cc injectors.
So, it won't start up using the starter, but first time does get a firing sound and then it just cranks forever without going any further.
So, I decided to pull start it. My buddy pulled me with a tow strap and after I let the engine spin up for a while and build oil pressure, I turned the key to On. It fired up and had the usual huge clouds of smoke while it burned off all the build chemicals and crap.
But it runs awful! The smoke cleared, but it wouldn't run well at all. It's like a piston engine who's timing is way off. I had to keep it at high RPM (approx 5K) to keep it running. After about 5mins it seemed like I lost combustion in one of the the rotors because it would backfire out of one of the exhaust ports, the oil pressure dropped, and then it killed.

So, I spent the last week looking things over, double checking connections, no vacuum leaks, etc, and decided maybe I had the distributor set wrong. I rotated the motor to the Leading (yellow) mark, removed the distributor, then rotated the motor one revolution until I was back to the Leading mark. Then I set the distributor in place again. In either case, the pickups line up perfectly with the igniters at both timing marks so I think I'm good for initial timing. I also replaced the plugs (NGK L and T plugs).

We made another attempt tonight but it's the same exact condition, except I don't have smoke coming out the back anymore. (I think it's run for all of 10mins but at least enough that I don't deal with the smoke anymore).

It runs so roughly, have to keep it revved and even then sounds bad - not that nice smoothness the rotary does after it settles in. Instead, seems like something fails, it gives up, or whatever, it backfires out of one exhaust port and then eventually dies.

So, my question is this: well, any thoughts from anybody? lol

And, is any of this to do with having a stock engine layout of the 85 GSL-SE, but the motor is a 1991 S5 that's been fully BPéd?

Or, is it as RAD Potential suggested, that the RE-EGI system is just a pain in the *** to make work right and I should just get rid of the FI and put a Weber on it?

Thanks all for whatever you've got.

j9fd3s

iTrader: (3)

yep. also if the S5 engine was 4 port the intake ports don't line up.

kurtoli2

The S5 I'm using is a 6 port and my GSL-SE's intake manifold lined up perfectly, including the sleeves and actuators for the auxiliary ports.

Still at a loss to explain why it won't run properly.

Thanks

kurtoli2

Ready to install. S5 and using the stock components of the 85 GSL-SE

Mounted.

j9fd3s

iTrader: (3)

bridge port and stock ecu isn't really compatible . its like sticking a 320 degree cam in there, you're going to notice