EJ20 Strokered to 2.3
How is this done? As the kit says it has 96mm pistons but I thought the maximum size for an ej20 was 92.5?
I presume the block would need boring and sleeving? Could this be done on a CDB? Has anyone ever run one of these kits? If so is there a linkt o any information on it? Thanks |
Originally Posted by JGlanzaV
(Post 11425118)
How is this done? As the kit says it has 96mm pistons but I thought the maximum size for an ej20 was 92.5?
I presume the block would need boring and sleeving? Could this be done on a CDB? Has anyone ever run one of these kits? If so is there a linkt o any information on it? Thanks |
Its just something I have found while boredom internet searching and was wondering if it was a viable alternative to an ej22? I presume sleeving etc isnt cheap?
I was actually looking at cams and what not for my current set up and got distracted hah. http://www.briancrower.com/makes/sub..._stroker.shtml |
I know they do alot of those builds on nasioc have a look on there.SJ.
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It looks like they're really using 96mm pistons,
when you calculate displacement (just for stroke) for 75mm and 79mm stroke it matches OK 96mm pistons with 75mm stroke is 2171cc 96mm pistons with 79mm stroke is 2287cc Or did I go wrong somewhere:wonder: |
I dont know to be honest, I would presume that they have worked it out to be able to advertise it as such?
What are the costs involved in putting liners in? Is it prohibitively expensive ocmpared to a ej22? |
Originally Posted by JGlanzaV
(Post 11425438)
I dont know to be honest, I would presume that they have worked it out to be able to advertise it as such?
What are the costs involved in putting liners in? Is it prohibitively expensive ocmpared to a ej22? |
I thought the latest idea was a "de-strokered" 2.5 block using a 2l crank?
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Originally Posted by bigarf
(Post 11425658)
to buy a 2.0l cdb then have it fitted with new liners will cost as much as buying a 2.2l block.then you have the chance of the new liners settling and having to strip the motor down again.or even worse,if you take the block to chy at pennine Subaru for your liners fitting,he will fit the liners at a 45deg angle so your pistons will be going up an down sideways:D
I think ill give him a miss then haha! I already have a 2.0 CDB hence I was wondering on the cost of this compared to buying a new ej22 and doing it that way!
Originally Posted by Kwik
(Post 11425659)
I thought the latest idea was a "de-strokered" 2.5 block using a 2l crank?
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So you decrease the capacity of the 2.5, but still machine it to CDB etc, If you are doing the CDB conversion etc, why are you running less capacity?
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I couldn't get my head around it either lol. I don't think the bore changes, the stroke goes down from the less throw of the 2l crank. I can't remember the exact figures but 75mm x 99.5mm bore = 2333cc.
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Yeah I understand that, but the reason of doing the CDB inserts etc, is because the 2.5block is crap etc, so if you have done that, the 2.5 block is no longer the weak point so you might aswell run the 2.5?!
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Originally Posted by JGlanzaV
(Post 11425725)
Yeah I understand that, but the reason of doing the CDB inserts etc, is because the 2.5block is crap etc, so if you have done that, the 2.5 block is no longer the weak point so you might aswell run the 2.5?!
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I just dont see how that works in the slightest! It makes no sense, so if someone wants to elaborate! (Alan?)
Yes bore and sleeve a CDB ej20 to 2.3 will give you a definite increase in torque and power etc. But downsizing a 2.5 should surely decrease the above? To which the point of all this work is surely to get MORE? |
Faster rev's is maybe the reasoning behind it.
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Higher rev limit, with lower piston speed maybe
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Id like someone to confirm for sure as i cant get my head around it!
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Originally Posted by JGlanzaV
(Post 11426456)
Id like someone to confirm for sure as i cant get my head around it!
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so it will rev higher than the ej25?
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Originally Posted by JGlanzaV
(Post 11426470)
so it will rev higher than the ej25?
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Ive built a 2.0 with a 83mm stoke crank to give 2.25 :-)
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Originally Posted by wms-racing
(Post 11426500)
Ive built a 2.0 with a 83mm stoke crank to give 2.25 :-)
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Originally Posted by veerinder9
(Post 11426501)
How did you do that? What pistons etc
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Originally Posted by wms-racing
(Post 11426506)
Thats not for sharing sorry, I'll build you one if you want :norty:
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I would also be interested in the specs...
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Just about all the built 2.3's in the US appear to be destroked pinned semi CDB 2.5's, but I don't see the point as the upstroked 2.2 will rev every bit as much, but has the advantage of the much stronger 2.2 CDB.
It's interesting how the different approaches become the accepted norm so quickly either side of the Atlantic e.g. they swear by liners, whereas my instinctive reaction is that I associate liners with dropping, no matter how well they are done. |
Originally Posted by Fat Boy
(Post 11426530)
Just about all the built 2.3's in the US appear to be destroked pinned semi CDB 2.5's, but I don't see the point as the upstroked 2.2 will rev every bit as much, but has the advantage of the much stronger 2.2 CDB.
It's interesting how the different approaches become the accepted norm so quickly either side of the Atlantic e.g. they swear by liners, whereas my instinctive reaction is that I associate liners with dropping, no matter how well they are done. We are talking about a CDB EJ20 stroked to 2.3 though ;) |
i have had a 2.0 cdb with new liners fitted and been told it will be fine .so its all about having the job done right https://scontent-b-lhr.xx.fbcdn.net/...05617700_n.jpg
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