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Old 12-25-2009, 02:40 AM   #1
bryancregger
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Member#: 174103
Join Date: Mar 2008
Chapter/Region: RMIC
Location: Wyoming
Vehicle:
2002 Impreza WRX
Midnight

Question More build question(s)

Mods I apologize about making another thread but I feel like my questions were fairly blurry so I'm hoping to get answers without cluttering too much.

Plans:

-Ej205 block Honed to stock bore
-My OEM pistons
-New OEM Rings
-ACL Race Bearings
-New OEM Crankshaft
-18g or 16g Turbo
-STI rods

Goals:
300 WHP and Big Reliability

Questions:
1. I neglected to label my Pistons upon pulling them out of the block, if I'm honing the block and buying new rings is this an issue?

2. What size is my OEM EJ205 crank? 48 or 52? and what number is the thrust bearing?

3. Are my STI Pink Injectors going to cut it for a 16g?

4. What kind of a difference will I notice between the 16g/18g against my current vf30 at say 18psi?

Thank you and again I apologize for my lack of knowledge but this is a spare block so its my tinker toy.

-BJC
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Old 12-25-2009, 09:13 PM   #2
bryancregger
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Join Date: Mar 2008
Chapter/Region: RMIC
Location: Wyoming
Vehicle:
2002 Impreza WRX
Midnight

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no one?
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Old 12-26-2009, 05:46 PM   #3
hobbesnapoli
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Location: PA
Vehicle:
02 WRX vf39

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Quote:
Originally Posted by bryancregger View Post
Mods I apologize about making another thread but I feel like my questions were fairly blurry so I'm hoping to get answers without cluttering too much.

Plans:

-Ej205 block Honed to stock bore
-My OEM pistons
-New OEM Rings
-ACL Race Bearings
-New OEM Crankshaft
-18g or 16g Turbo
-STI rods

Goals:
300 WHP and Big Reliability

Questions:
1. I neglected to label my Pistons upon pulling them out of the block, if I'm honing the block and buying new rings is this an issue?

2. What size is my OEM EJ205 crank? 48 or 52? and what number is the thrust bearing?

3. Are my STI Pink Injectors going to cut it for a 16g?

4. What kind of a difference will I notice between the 16g/18g against my current vf30 at say 18psi?

Thank you and again I apologize for my lack of knowledge but this is a spare block so its my tinker toy.

-BJC
1) Don't use your stock pistons if you're honing the block, buy new ones

2) I think 52mm and #5 ... keep searching

3) Yea they're fine- nicely matched to the turbo

4) 16g will spool faster- slightly better top end... 18g will spool similar-to-slower and much better top end --- at 18psi the difference will be mostly negligable
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Old 12-26-2009, 05:56 PM   #4
bhhamblin
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Location: Clinton, UT
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13 STI, 83 DR30
93 R32 GTS-T, 93 R32 GTR

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Get forged pistons.
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Old 12-26-2009, 06:34 PM   #5
soobaviator
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Location: Northern VA
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2009 DGM LGT Spec.B
08 Audi Q7 4.2 PRM

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Honing and putting stock pistons back in is not a good idea. Get a set of oversized pistons then have the block overbored and honed to match.

Get the rods and stock parts of the rotating assembly balanced.

Consider head work including light pnp work (blending seats and flash removal and polishing exhaust ports) high lift cams and upgraded valvetrain for significantly increased power and reliability.

For 300 WHP 565cc injectors are the bare minimum but will need to be run at high IDC near peak power. Look at 650cc units for adequate headroom especially with a big 16g or 18G.

-soobaviator
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Old 12-27-2009, 05:11 PM   #6
bryancregger
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Chapter/Region: RMIC
Location: Wyoming
Vehicle:
2002 Impreza WRX
Midnight

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okay great thank you all so much
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Old 12-27-2009, 06:43 PM   #7
ihadmail
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Location: Chapin, SC
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2009 Cadillac CTS-V

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Every crank I've seen out of a 99 or newer EJ seriese engine had the 52mm rod journal and thrust bearing in position #5. I have; however, only physically seen or measured 6 of them.

EDIT: the 99+ EJ18, EJ20 and EJ22 all use the same crank part number so they will all be identical.
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Old 12-27-2009, 09:46 PM   #8
bryancregger
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Join Date: Mar 2008
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Location: Wyoming
Vehicle:
2002 Impreza WRX
Midnight

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True on most accounts except the 04-05 were crossdrilled for lubrication purpose.
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