I hope this is the right forum for this - I think it's a kind of "perfomance modification"...
As I mentioned in this thread (=> viewtopic.php?f=29&t=2228), I currently have problems with the LG4 engine in my 1982. First of all, I want to say, that I will fix this problems because I want to keep this engine running. I will keep you updated in the other thread, maybe it is interessing for a few people in the future.
As a kind of "crazy project", I wanted to convert to LU5 (Crossfire injection) in the future. I primarily thought that it is only necessary to replace everything from the intake manifold up, the wiring harness, the fuel pump in the tank and the ECM. I've got all this parts, including a 1983 LU5 body shell with gas tank and exhaust system. It's a big puzzle, but it should be possible.
After reading the gorgeous (!!!) information from brother al (=> viewtopic.php?f=30&t=1907) about the different engines, I found out that pistons, camshaft, heads, etc. are different on the 1982 LG4 compared to the LU5. This information saved me a lot of trouble, because I did not know that there were so many differences between the long blocks! I know for now, that there is no way to "convert" my 1982 LG4 to the LU5 setup.
I am working on this cars for about 10 years now. In Germany, this is a kind of "unusual" car and hobby, but for me, it's a passion. I love these cars since I was a kid and so I still want to go my way with the LU5 conversion. I know this is unusal, too - most of the people get rid of the crossfire injection and replace it with a carburetor setup.
To keep a long story short, I've had working on a lot of cars and I've got a lot of parts in my garage. I've got also a 1986 Firebird V8 with LG4 in the past and saved the engine. It needs a complete overhaul, but I think the components are ok, solid and usable.
So when I look at the information from brother al above, it seems the big puzzle could be solved by combining the things this way:
- Cylinder Block: 1986 LG4
- Pistons: 1986 LG4
- Crankshaft: 1986 LG4 (?)
- Camshaft: No idea (1986 LG4 is different than 1982 LG4 and 1983 LU5)
- Heads: 1986 LG4 (?)
- Intake Manifold: 1983 LU5
- Distributor: 1986 LG4 (?)
- Gas Tank: 1983 LU5 (Fuel pump only)
- Exhaust system: 1983 LU5 (preferable: a new aftermarket system)
- ECM: 1983 LU5
- Wiring harness: 1983 LU5
Of course, this is not a project done in a few days, this is a huge thing. I've got all the parts above lying around, so there is no need for a hurry.
I will highly appreciate every kind of input!