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Guest Message by DevFuse

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EA81&EA82 Intake Manifold Q.

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13 replies to this topic

#1 JonOfScio



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Posted 17 August 2003 - 09:31 PM

do any of the manifolds switch over from one engine block to the other?

EA82 N/A carb fit on EA81 carb body? SPFI manifold switch?

#2 GLCraig



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Posted 17 August 2003 - 09:50 PM

you can swap carb and spfi manifolds

#3 JonOfScio



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Posted 17 August 2003 - 11:40 PM

well, that doesn't answer my question.

Can you swap manifolds from EA81 and EA82 heads? and if so, which ones?

#4 soobme


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Posted 18 August 2003 - 12:00 AM

As far as I know, they will swap between EA81&EA82, becaus I know that U can put FI from an EA82 on to the EA81 engine with no mods to the heads or block.

#5 GeneralDisorder


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Posted 18 August 2003 - 12:47 AM

Yeah - there's at least one board member that is running an EA82 SPFI on his EA81. There's a bunch of wireing that needs doing - and the Disty needs modifications slightly... but it can be done.


#6 JonOfScio



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Posted 18 August 2003 - 04:16 AM

and is a turbo easily adaptable to an spfi system?

#7 Skip


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Posted 18 August 2003 - 07:28 AM

Jon, no the turbo has duel port heads and the SPFI has single port heads. The injectors on a EA82T are in the manifold and the injectors on a EA81T are in the head - both have two intake ports
The carb and the SPFI heads have only one "siameased" intake port. The EA81 and EA82 single port manifolds can be swapped.
Hope that answers your last question.

#8 Adam N.D.J.

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Posted 18 August 2003 - 01:01 PM

Uh, Skipper, mighta jes read you wrong, but the EA81T has a single intake port, jes like the NA ones do. You can put an EA81T intake onto an NA EA81. Also you can put an EA82 Carb'd or SPFI intake onto an EA81. When you go from the 82 to the 81 you have to play around with the EGR tube, as they are different, also the thermostat housing is a little different. On the SPFI intake, I know for sure, there is a little hose coming out of the Thermo housing that will hit the dizzy on an EA81, but you can play around with it and get it to work right. Hope this helps.

#9 archemitis


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Posted 18 August 2003 - 01:11 PM

how bout using the ea82mpfi system on an ea81? custom intake, but it would handle a turbo alot better, with more boost:banana:

#10 Skip


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Posted 18 August 2003 - 02:19 PM

Thanks Adam, my bad. You are obviously correct.
Me mind, it tends to go on vacation more and more lately.

#11 robertbbb


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Posted 18 August 2003 - 05:45 PM



Hope this helps, I'm saving up.


#12 Caboobaroo


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Posted 18 August 2003 - 08:06 PM

but what Andrew has told me, its best to use a mpfi for a turbo instead of a spfi. I don't know why that is but thats what he told me.......

#13 shanonsf


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Posted 18 August 2003 - 09:41 PM

hey there,

pardon my ignorance, what would be the benefit of putting an EA81T intake on a n/a ea81?

are there any other parts that would be worth considering bolting onto the n/a EA81 from the EA81T?
I have a EA81T on the stand that is probaly not going into the car ........

building a rally crosser

:headbang: 82 GLW rally wagon

#14 CIS Subaru

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Posted 18 August 2003 - 09:50 PM

I was told that MPFI is better with turbos because the fuel is added at the last second. This is better because fuel doesn't like to stay suspended in compressed air as much and will fall out of suspension if it has to travel too far. This may not be fact, but it sounds reasonable to me.

For the CIS link, click the link in my sig below.

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