Someone had a question about what exactly the super ETA was. I found some info on it, and the link is posted below to the whole thing, but i figured i'd post the salient points. Happy Hunting!
Here's the link:
http://www.amasci.com/~dalus/bmw/ftp/bmw/new_faq/FAQ.15
And here's the goods:
In '88 BMW had already introduced the 'i engine. For one more year they sold the 'e engine in the base model 325 and the 528e, but they modified it slightly, maintaining the long stroke crankshaft, but switching to the 'i head and doing
some other mods to produce more power than the original 'e.
This is often refered to as the "super eta".
According to the BMP catalog, the m.y. '88 528e ("super eta") not only
has the same head as the 87-91 325i, but it also uses the same dual valve
springs. It also shows the 1/87 - 9/87 eta using the same valves, guides,
and springs as the "i", but with a different head (fewer active cam
bearings?)
...
Also, they show the (3/87-on) super e having different injectors and
airmeter than the earlier e's, but not the same as the 325i parts.
Here's the link:
http://www.amasci.com/~dalus/bmw/ftp/bmw/new_faq/FAQ.15
And here's the goods:
In '88 BMW had already introduced the 'i engine. For one more year they sold the 'e engine in the base model 325 and the 528e, but they modified it slightly, maintaining the long stroke crankshaft, but switching to the 'i head and doing
some other mods to produce more power than the original 'e.
This is often refered to as the "super eta".
According to the BMP catalog, the m.y. '88 528e ("super eta") not only
has the same head as the 87-91 325i, but it also uses the same dual valve
springs. It also shows the 1/87 - 9/87 eta using the same valves, guides,
and springs as the "i", but with a different head (fewer active cam
bearings?)
...
Also, they show the (3/87-on) super e having different injectors and
airmeter than the earlier e's, but not the same as the 325i parts.