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Discussion Starter #1
I've read that:
-Jun makes a stroker kit for the 2.5L to 2.6L
-the 2.5L is a bored 2.2L
-the 2.2L is a bored 1.8L
-the 2.0L is a bored 1.8L

Correct me if I'm wrong. My memory sucks! :eek: But if this is all true it follows that a 1.8L and can be transformed into a 2.6L!! :eek: Am I missing something here? Sounds pretty crazy to me...
 

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overdeveloped beater
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the 2.5 is a bored and stroked 2.2, and the 2.2 is a bored 1.8. If the Jun crank fit into a 1.8 block, you'd have to do the math to figure displacement. It won't be 2.6L unless you bore it out too.

incidentally, the 1.8 block may not be strong enough after all that work.

-the SVX 3.3 H6 is a 2.2 +2!
MagicMT said:
I've read that:
-Jun makes a stroker kit for the 2.5L to 2.6L
-the 2.5L is a bored 2.2L
-the 2.2L is a bored 1.8L
-the 2.0L is a bored 1.8L

Correct me if I'm wrong. My memory sucks! :eek: But if this is all true it follows that a 1.8L and can be transformed into a 2.6L!! :eek: Am I missing something here? Sounds pretty crazy to me...
 

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Discussion Starter #3
Re: Re: EJ Engines

Wow, so it is true! Are Subaru engines more "borable" (is that a word?) than other engines? I haven't heard of other manufacturer's engines displacement being changed so much...
Storm said:
-the SVX 3.3 H6 is a 2.2 +2!
Huh? :confused: Please dumb it down for me. :p
 

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The SVX engine is just a 2.2 liter engine with an additional two same-size cylinders.

So it's like they took two pistons from a half a 2.2 block engine, made a longer crank, and then glued it all together. Same size pistons.
 

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Discussion Starter #5
:eek: Whoa! Would it be possible to stick 2 extra cylinders on a 1.8/2.2/2.5 since they're all basically the same engine?
 

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overdeveloped beater
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Re: Re: Re: EJ Engines

MagicMT said:
Huh? :confused: Please dumb it down for me. :p
The SVX motor has the same bore size and stroke as a 2.2....just 2 more cylinders. Kinda like a Chevy 4.3 V6 being a 350 with 2 cylinders lopped off....but more superior!

I don't know about Subarus being any more bore-able than another motor. You'd have to talk to a motor builder who knows where wall thickness danger begins with certain alloy steel cylinder sleeves.
 

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MagicMT said:
:eek: Whoa! Would it be possible to stick 2 extra cylinders on a 1.8/2.2/2.5 since they're all basically the same engine?
Sure, if you get a new block, crank, heads, intake & exhaust manifolds... wait, why not just get the H6 3.0? :lol:
 

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Discussion Starter #8
So is the 1.8/2.0/2.2/2.5 the same block, just with different internals? Like bore, stroke, crank?
 

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Discussion Starter #10
Really? Hmm, how come more people aren't converting their 1.8/2.0/2.2 to 2.5 stuff? Cost?
 

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Discussion Starter #11
How come more EJ20 WRX owners aren't converting their engines to 2.5L internals (and turning them into 2.5L?)? Some WRX owners, like Mr. Imprezer, are even doing engine swaps for the 2.5L engines. This doesn't make sense if they're just the same engine with some internal differences unless the cost is crazy or something. Anyone have ideas? Bump!
 

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MagicMT said:
I've read that:
-Jun makes a stroker kit for the 2.5L to 2.6L
-the 2.5L is a bored 2.2L
-the 2.2L is a bored 1.8L
-the 2.0L is a bored 1.8L

Correct me if I'm wrong. My memory sucks! :eek: But if this is all true it follows that a 1.8L and can be transformed into a 2.6L!!
yes and no. :D

coming from aircooled VW and porsche flat engines, as long as you have a 1.6L dual port engine, the sky is the limit...you can increase displacement from 1600cc to 1641, all the way to 3.0L+ relatively easily. :eek:

all you're bascially doing is slapping bigger pistons and cylinders on the block, allowing clearance for the bigger pistons in the heads, and in the case of a stroked motor, the block must be machined to clear the stroker crank. all in all, it's very simple, and in theory could be adapted to a subaru engine, since they're basically the same.

unfortunately, there are DOZENS of these kits available for VW's, and practially NONE for subarus (outside of the rigoli kit$). welcome to the wonderful world of limited aftermarket...again. if you have tons of money to burn, and access to a gifted machinist, go for it! :D

also, on a car like an old VW or porsche, you don't have to worry about electronic engine management, aside from making sure that the engine is getting spark. everything else is taken care of through proper carbueration. i doubt you could simply bore and stroke a 1.8 to 2.6L and expect it to run properly. ;)

then there's the set of problems that comes with maintaining a high output engine with thin cylinder walls...unless you like pulling things apart every couple thousand miles (in a best case scenario), it'd probably be best to steer clear.

-adam-
 
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