Good day!

I just did a compression test on a customers very beautiful 1985 Chevy 6.2 n/a truck. It runs a lot better after I put a manual glow plug override on it and adjusted the injection pump timing. Starts right up after 8 seconds of glow plug time, not plugged in.

However, it has excessive Blowby coming out of the oil fill tube and has some whiteish smoke from the exhaust.

I just did a compression test:

Cylinder #1=325 at 17 puffs
Cylinder #2=355 at 15 puffs
Cylinder #3=320 at 13 puffs
Cylinder #4=355 at 16 puffs
Cylinder #5=325 at 13 puffs
Cylinder #6=345 at 17 puffs
Cylinder #7=320 at 15 puffs
Cylinder #8=365 at 17 puffs

Customer wants to add a 6.5 turbo to the 6.2.

What are your thoughts?

How long would his low compression 6.2 last with a turbo?

Would it be ok to turbo a low compression 6.2?

Would a take out Navistar or Navistar optimizer be a better candidate for a turbo?

Customer does not want spend a ton a money on a motor. Just wants something reliable with a little bit more power.

He loves the old 6.2 and 6.5 diesels and would rather keep it a diesel.

Any advice from you gurus would be helpful for the customer.