Hi everyone i have a 1998 subaru Australian Wrx Gf8.....it has everything from factory stock beshides 3inch Tbe, vf22, fmic, and ecu is standard but soon will be fully tunable by installing a chipset and rom to turn it into a live standalone ecu......

The ej20 block Bottom end craprd it self long story short so i thought about installing a 2002 wrx ej205 for cheap.....i found one cheap for $300 aus, and now thininkg to myself my 1998 ecu parameters might be a bit diffrent fireing order compared to a ej205 block because of crank angle sensor might be off compared to my phase 1 ej20k block being suited to the factory harness and sensors?

Also notice somthing scarry the pistions come out complety FLAT to the top of the deck...my old block only had a ej20 wrx 75mm stroke and stoped a fair bit before the decking of the block.... will this mess with my timing and Valves hiting the pistons????

In all that said.....Block will bolt up perfectly with the ej205 oem gaskets.... i will use a ej205 harmonic balance Not my 1998 ej20k factory harmonic..... i want to play it safe i can run everything from Oil pump to cooling and block matting....so the rest im a little puzzled.

Please give us your advice on what u known i might be missing

 

Here is a video of what I'm trying to explain and do

 

A couple of things on your video :
Crank angle sensors are the same so no need to rewire anything.
The knock sensor is the one at the rear top right of the engine and the one at the front is the oil pressure sender unit.
Don't recognise the pistons in your EJ205 engine - they normally have a bowl on the crown whereas yours seem to be a flat crown with the valve pockets - got a clearer picture of
them at TDC ?

Mick

 

 

thanks mick for the reply...how do u know the crank angle sensors are the same did u do a similar conversion too ?
i hope the pic helps to show the pistons a bit better...

I Guess my real question to eveyone is should i start on swapping out the old ej20g with the newer 2004 ej205 ?
OR will i hit some Hiccups along the way they will stop me to continue and finish the short block over ?

 

The crank PULLEY is different between the years you mention rather than the sensor itself.......you simply use the old one to marry up with your ECU

 

About to start on the project next week.....and I'm really really worried it wont work because on multiple forums no one has said yes u can do it it works......eveyone has a guess at my questions...

so has anyone acutely done what I'm about to do ? V6ej205 block with v4ej20 heads ?

 

Yes you can do ii

 

sorry to ask joe but.....have u acutely done it your self ? If so can u shed some light on the major problems I'll bump into ?

 

Yes we have done it apart from as stated above everything else is only silly things that will become blatantly obvious to you as you progress. Don't use cometic gaskets and if possible use ARP studs.

 

Thanks for confirming joe......i have arp head studs.....but why do u say dont use Cometic MLS gasket? From what i know after 2001 all EJ205 used MLS head gasket?

 

Better off using Cosworth or RCM MLS Stopper gaskets, I personally don't rate Cometic head gaskets.

 

Merlin/Mick has the same view as myself by the looks of things but I've just seen your location

 

even Subaru MLS gaskets are better than Cometic.........

mail order down under is no issue

 

just wondering what thickness gaskets you used?