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Guest Message by DevFuse
 

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'86 EA82 SPFI Block Swap


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4 replies to this topic

#1 6 Star

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    Boxer Nostalgic

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Posted 29 February 2012 - 06:17 PM

Since the funds/means for an EJ swap are a bit out of my reach, I'm thinking of making some improvements that I can actually get my hands on. (and not have to do tons of wiring :D)

My '86 wagon has a stock carbed hitachi engine, and its on its way out. :dead:
I'd like to go through and just reseal the engine and retune the carb, but if I'm going through the trouble I'd like to make improvements while I'm at it.
I tried some searching and didn't come up with much.
My question is:
If I were to swap in a spfi longblock (higher compression) all I have to do is use the disty from the carbed engine, and the intake manifold from the carbed engine. Correct?
I'm also planning to ditch the hitachi carb and put a weber in its place.
Let me know if I am forgetting anything. :)
Thanks in advance.

#2 MilesFox

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Posted 29 February 2012 - 07:26 PM

you will have to delete the ASV valves on the back of the heads since the ports for them are not present on the spfi heads. OR, use the carb heads on the spfi block.

set the timing about 10 deg higher and open up the exhaust.

#3 6 Star

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    Boxer Nostalgic

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Posted 29 February 2012 - 08:27 PM

Sorry, I'm a little confused...
When I swap in the SPFI longblock, wont the asv be deleted in the progress with the old engine anyway?
Or can I not run the SPFI heads with the carbed intake manifold?
I just looked under both my SPFI EA82s and the heads look exactly the same as carbed heads, they just have the (would be) ASV ports already blocked off.
:confused:
Glad I'm asking questions now and not later, staring at a problem. :lol:

#4 6 Star

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    Boxer Nostalgic

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Posted 29 February 2012 - 08:42 PM

Nvm, Fox I think I get what you're saying now. I was just overthinking. :-p

What would you recomend to "open up" the exaust? Cherry bomb? Straight pipe?

#5 MilesFox

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Posted 29 February 2012 - 11:13 PM

Yeah. I like the cherry bomb right after the y pipe flange in the midpipe, and replatcing the muffler with straight pipe(the leftover section from the middle! IT will have a stronger midrange Stay with a 1 7/8 (closest to stock) so you don't lose torque. You can go larger at the tailpipe for sound.




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