I purchased locally a S4 turbo engine, transmission, and LT-8 ECU to swap into my B2200, which right now has an S4 N/A engine.

Once I got the engine home, and inspecting closer, I noticed that this engine is not as stock as I thought, let me know how it is set up.

This engine has S5 housings, irons, and turbo, so I will assume it is an S5 motor with an S4 intake and TB on it, I think the tranny is even S5, since it has 2 mounts on it at about the 5 and 7 o'clock position.

As for upgrades, it is setup for a FMIC, it has a T04B compressor housing on the stock turbo, using a u-trim compressor wheel (70mm exducer, 54mm inducer, 8 blade), it has 3mm apex seals, gasket matched lower intake to engine ports, and it feels way to smooth to be stock inside the engine ports, so I assume it has a streetport (cant feel a bridge), exhaust ports look stock, but unknown, it also has 1000CC secondary injectors, and stock primary's. Engine has all of the emissions delete, and the double throttle plates removed, the engine is running on premix. The wastegate appears stock, but the plate opposite has been ground out to open the flapper valve more, it also has a blow off valve.

From what I have researched, this engine should be safe about 300-350HP. What do you think about this setup? It seems like it was done properly to me, maybe look at putting larger injectors in it is all I might do. I street/daily drive my truck, so I want something usable on the street.

 

Your power estimate is about right. 350HP around 15 PSI on that turbo.

Without seeing pictures of the engine, wiring, and internals (long shot I know), it's hard to say whether it's done "right".

One suggestion I would make is to ditch the Microtech. It is a stone aged ECU, perfectly fine for track use, but it's limitations on the street become apparent very quickly. Lack of closed loop, lack of idle control, inability to save maps to disc, poor datalogging, primitive distributor based ignition model, poor interpolation on the fuel table, poor resolution with large injectors, and numerous others.

Haltech P1000, Megasquirt MS3X (or MS3-Pro if you don't want to open the case) are my top choices.

 

I am going to start with this Microtech, I have no experience with standalone or tuning, and I know nobody with any experience, or anybody with rotary experience either. But, I was planning on putting the Microtech in my truck before winter, and run my S4 NA motor on it, so I can get a feel for it, and figure it out on a less temperamental rotary lol. With it being rather old and simple, may make it easier to learn, and when I upgrade, it will be less of a learning curve.

As requested I attached pictures of the engine, needs a good cleaning up, and some paint.

 

I would connect the transmission, jump the starter and do a quick compression test to make sure the engine is still good before you install it in the car

 

I had the guy do the compression check that way before i bought it. Was reading 95-100 or so both rotors. I think he had the throttle closed though too and the motor has been pulled for at least a year.

 

What clutch/pressure plate is that? Never seen one quite like it.

 

The clutch is a LuK clutch, looks like a stock replacement one. Since you got my curiosity up, I was able to find pictures, and it looks like this clutch is for a S4.

This leads me to another question, are there differences in the S4 and S5 stock flywheels? This will tell me what rotors are in the engine, hopefully its something visible, but worse case, I will have to remove the flywheel and weigh it I guess, I assume the S5 flywheel has a slightly lighter counterweight for the lighter rotors, making the complete flywheel slightly lighter?

 

yes. there will be a casting number. N326/N318 is S4 and N350/N370/N3A1 is 89-2002

if that was my engine, i'd put the metering pump back in, toss it in, leave it rich, and run like 10-12psi and just enjoy.

 

Ill probably keep it conservative. I want to keep using it as a light duty truck, hauling my quad around, dump runs, etc.. Would also like to drive it year round, but a 300hp turbo rotary in a B2200 driven in snow and ice would be scary lol. It may see the drag strip every now & then. Im not after all out power, i think a 300hp B2200 will suprize many people.