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Old 05-07-2010, 09:56 PM   #1
renegado
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Default JDM Ej20g rebuild

Hello to every one, well im planning to rebuid my engine but really dont know which parts to buy that will fit my engine a JDM ej20g from a wrx GF8 1995 looking at the wiseco pistons appears to be this two K576M925 and K579M925 which of this two will i have to buy or there is another one specific for my engine? for the rods i was planning to buy the Brian Crower I-Beam Connecting Rods (Subaru EJ205/EJ257) Item Number BC 6607 also on the bearings i think the best brand is cosworth but dont have good info which will work on my engine just got some info on the ACL Part# 4B8320H-.025 for the rod bearings and for the Main will it has to be Part# 5M8297H-.025 (For thrust in #3 position), on the gaskets also planning cosworth as i heard are better than cometic Cosworth Subaru EJ20 Head Gasket (93mm bore / 1.1mm Thick) - Part # 20000922 and for the last some really nice Brian Crower Stage 2 272-272 cams that says is for 02 wrx but i pray will work on my engine.
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Old 05-08-2010, 01:37 AM   #2
Marnix
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I thin Brian Crower rods are overkill when using on an otherwise stock block/turbo. Eagle rods are fine on an open deck block. By the way, those cams will NOT work on your engine, you will have to resort to HKS (difficult to find) or JUN (easier) for Phase I cams (only work up to 1998).

Regarding Wiseco pistons, everything will work as long as it says EJ20 up to/before 1998.
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Old 05-08-2010, 11:41 AM   #3
renegado
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Quote:
Originally Posted by Marnix View Post
I thin Brian Crower rods are overkill when using on an otherwise stock block/turbo. Eagle rods are fine on an open deck block. By the way, those cams will NOT work on your engine, you will have to resort to HKS (difficult to find) or JUN (easier) for Phase I cams (only work up to 1998).

Regarding Wiseco pistons, everything will work as long as it says EJ20 up to/before 1998.
Well from a store they told me that is not necessary to change the resorts will be if i wanted to use the Brian Crower stage 3 280 cams but they say as long i will run to 7500rpms the OEM valves are fine, but in stead i was planning on changing my resorts to Brian Crower Spring / Retainer Kit (WRX / STi) item number BC0600 with that i will be able to rise my red line a bit. I think my ej20g isnt that popular specially the JDM because there is not much info about aftermarket parts.
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Old 05-08-2010, 11:57 AM   #4
69subaru360
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BC cams made for an 02 WRX will not physically fit in EJ20G heads.
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Old 05-08-2010, 12:12 PM   #5
renegado
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Originally Posted by 69subaru360 View Post
BC cams made for an 02 WRX will not physically fit in EJ20G heads.

Are you sure? there is no way that i can make them work? or same item sold here in the US? but for the ej20g?
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Old 05-08-2010, 02:51 PM   #6
Marnix
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No way to make Phase 2 cams work in a Phase 1 head (journals have different diameter, the thrust bearings are different also). Search for custom EJ25D cams (pre 1999) they are also Phase I and will work in EJ20G heads also.
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Old 05-08-2010, 03:03 PM   #7
69subaru360
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Delta cams can regrind your current cams. They have a solid reputation. www.deltacam.com

You will need to re-shim all the buckets with new or reground cams.
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Old 05-08-2010, 03:19 PM   #8
renegado
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Originally Posted by 69subaru360 View Post
Delta cams can regrind your current cams. They have a solid reputation. www.deltacam.com

You will need to re-shim all the buckets with new or reground cams.

Thanks for the help man, and do you have some idea of which of these bearings will be for my specific engine? 4B8320HX (52 mm) 4B8320H (48mm).
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Old 05-08-2010, 03:24 PM   #9
69subaru360
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You have 52mm rod bearings. Only the EJ25 phase 1 used 48. Every other EJ is 52.
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Old 05-08-2010, 04:13 PM   #10
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You have 52mm rod bearings. Only the EJ25 phase 1 used 48. Every other EJ is 52.
Thanks, thanks a lot man.
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Old 05-08-2010, 05:02 PM   #11
Cbgrandtheftauto
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i know kelford makes cams for the 20k..so im sure they make them for the G also
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Old 05-09-2010, 03:29 AM   #12
Marnix
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'His' engine has hydraulic buckets so you can't regrind the cams as the base/ground circle must stay the same.
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Old 05-09-2010, 09:51 PM   #13
iluvdrt
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If you want 272 or 280's get a delta regrind done. $50 a cam and they do good work.

The EJ20G is essientially the same as a EJ25D. No new style cam will physically fit into the head. You cannot make them work, even if you did your cam gear will not fit onto the wrx/STi cam and you cannot use their cam gear;the triggers are wrong.

Go with the regrind. There is nothing wrong with them, and they will provide the same (or close to it) results. Dont buy into the whole marketing hype.
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