http://www.leoneturbo.com/docs/EA81_SPI_guide.pdf

 

All EA81's (talking non-turbo here) were 

equipped with carburetors from the factory. Either the Hitachi 2 barrel, 

or the Carter-Weber single barrel. Both have their array of problems, are rather anemic in the performance 

department, and have a vast array of complicated vacuum lines. As well as extra systems to make them economical, 

and environmentally friendly - even to the point of using computers to control the carburet

or mixture adjustments. 

 

Fortunately, Subaru gave us an excelent upgrade path. In 1986, 

Subaru introduced the Single Point Fuel Injection 

(SPFI) to the US market on it's EA82 engine. This engine happens to share the exact same intake ports on the heads, 

and the same overall length for the intake manifold as the EA81. Sadly the EA82 engine, while sporting an almost 

indestructible, very simple fuel injection system, has troublesome timing belts, is prone to ticking lifters, and (because of the 

timing belt arrangement) can be difficult and time-consumeing 

to work on. It also does not fit in the EA81 vehicle 

engine bay without modifications to the frame rails, and moveing the hill-holder valve.

 Because of the similarities between 

the manifolds, the almost self contained fuel injection manifold from the EA82 bolts straight onto the EA81 engine with 

minimal modifications

Yep. Good ol' GD. I'll be doing this to my 85 Brat soon. Possibly in the spring at the latest.

if anybody that lives around me needs a SPFI intake for this i have one off a 92 loyale i would let go for almost nothing

Speaking of GD... What ever happened to him? I haven't seen him on here, and his last post was months ago.

Still around. I talked to him 3 days ago. Just busy...

I converted my 81 brat to tbi it loves it took a day to do 15 % more power and way better runability has been tbi for 10 years no problems