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

 

I don't know the kit you're referring to but it sounds like reinventing the wheel. Why do all that when there are EJ22 blocks available?

 

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.

 

..

 

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

 

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?

 

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

 

I thought the latest idea was a "de-strokered" 2.5 block using a 2l crank?

 

LOL!

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!

Ive never heard of that, what is the point in that?!

 

https://www.scoobynet.com/scoobynet-...roker-kit.html

 

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?

 

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.

 

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?!

 

That was my thinking. People were saying it was cheaper than the 2.3, but I couldn't see how there would be a vast difference. People were saying it had lots of torque but I thought that was the advantage of the 2.5.

 

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.

 

Higher rev limit, with lower piston speed maybe

 

Id like someone to confirm for sure as i cant get my head around it!

 

I asked about this as I wanted to go down the 2.35 route aswel for next year and apparently it works out cheaper than buying the 2.2 block. Its basically to have more rev range

 

so it will rev higher than the ej25?

 

Yes

 

Ive built a 2.0 with a 83mm stoke crank to give 2.25 :-)

 

How did you do that? What pistons etc

 

Thats not for sharing sorry, I'll build you one if you want

 

Lool pm me details for a scd block supplied by me

 

I would also be interested in the specs...

 

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.

 

I dont understand how a liner can "drop". Im gonna google it, personally I dont see how they can be any less reliable?

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