If you are looking for more power out of an EA81,A weber carb or SPFI swap give the most bang for your buck.However, the weber gives a slight improvement in power,but where it really shines is run ability compared the hitachi carb.So it helps a bit.For power at all ranges go with the SPFI swap.I just finished my SPFI swap on my EA81 offroad toy.It seems to have more power than any other EA81 series vehicle that I have ever driven.It is lifted 2" and has 235/75/15 MT's on it.It is faster than the car when it had the stock carb and stock tires.It is even faster than my old 84 brat with a weber and stock tires.

 

Before the swap I had to slip the clutch a bit or give it lots of power to take off with those bigger tires.Now I can pull away like a normal person.

 

Weber: Far better run ability and tune ability over stock carb.Seems to give good low end grunt,decently cheap

 

SPFI : its in a different league when it comes to run ability.Makes good Power across the rev band,More expensive than weber,wiring.

 

My Ea81 Idles smoother than it has ever,and it has no problems at all reving to 8k.The stock carb couldn't put enough fuel in the engine to go much higher than 6K.

 

Other than that,Maybe a delta cam would help a fair bit...But for right now its got loads of power...

Agreed, I love my SPFI EA81 swap. Where are you running the timing on yours? I find that mine produces LOTS more power if the timing is pushed from the recommended 20 degrees up to more like 28 degrees or so.

I have no idea what mine is timed to.I just plopped the disty in and moved the plug wires around until it started and ran...

Whats your mileage like, even with your tires and lift?

What is the best doner vehicle for an EA81 spfi conversion? What is the wrecking yard price range for spfi components/kit? Any advice or comments welcome.

I used a 1990 Loyale SPFI setup and followed GD's write up to the letter. You will want to read his article before getting started to make sure you know what parts you will need from the donor car. It is well worth the trouble IMO, however it IS a lot of work.

 

GD's SPFI Conversion

link to GD's write up is broken or missing

 

Bennie