Well, this is my first post and I'm not even sure this is the correct thread or not. Mods feel free to move this where it belongs.A few years ago, I purchased a '86 Samurai with a VW diesel of unknown year and model. After showing it to a local VW specialist, he told me it was a 1.6. Since then he has retired and closed his shop so no more info. This is a normally aspirated engine. I use this rig for ranch work and trips to town (60 mile round trip). It sees no freeway use and little 2 lane highway use. Power is moderate and mostly lacking at speeds over 45 mph. Top speed is around 65 but takes 2 days to reach it My goal is to try to improve acceleration about 10%. I know making it lighter would help along with less aggressive tires. I also have adjusted the "enrichining" valve on the pump. It now makes smoke at over 80% throttle, but none to speak of under that. The previous owner had it set much richer and it bellowed black smoke, but had more power.I was hoping someone here could help me determine its approximate year, if it's a 11mm head model or not, and any other info you might share. I am not looking to turbo (yet) it but am interested in sending the pump to Giles if it would be worth it. Another option is to replace this engine with a turbo diesel.Thanks in advance for any info.