I just tore the motor apart that was in my buggy, since I lost an apex seal I thought I'd see what it looked like on the inside. I am trying to figure out what, if anything, has been done to this before deciding for sure what direction to take. The engine on the outside was pieced together from at least 3 different series' of motors and I was interested to see what was inside. I think the side plate has a large streetport (based on pictures I have found) but the center housing looks stock, or really close to it. I am also trying to figure out what rotors are in it (turbo, S4, or S5) so I know what compression ratio they have and their weight. I have attached pictures of the housing and would appreciate any information on what it looks like and what to look at to see if it's worth rebuilding or I should pursue my current plan to swap it for a FI turbo S4 or 5.

 

Here are some pictures of the rotors. I think they're S4 turbo rotors since the dish is just under 1/2" deep and they weigh a bit over 10lbs. As mentioned in the earlier post, I lost an apex seal on one rotor, and apparently it put a little gouge on one side of the rotor and chipped by the seal a bit. I am attaching pictures trying to find out if this rotor is still good or not, and if anyone can confirm that it's a turbo rotor.

 

That rotor is junk, not even fit for a 3mm job. Look inside the rotor near the bearing for a T cast into it, if you see one it's turbo.