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06-20-2007, 11:20 AM | #1 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
Hybrid 2.5L short block build Q's
I'm looking to build a hybrid motor due to some unfortunate motor problem.
Car is 2005 WRX originally with EJ20 I'm looking to do the following Bottom end 2.5L short block swap. deautchwerks 750 cc injector or PE 800 cc injector Walbro 255 fuel pump ARC FMIC and some sort of short ram intake. (HKS SMF Maybe....) Tuning will be either ecutek or ap street tuner. The car still be using the stock EJ20 top end stock and 5MT Transmission. (yes i know i know i already did all the reading in regards to weakness of the transmission) Turbo in consideration FP Green 8cm - 2.4" inlet internal waste gate Deadbolt 20G / TD05 8cm Blouch 20G / TD05 (Should be same or similar to deadbolt setup) Any suggestion to the setup? am i missing anything?
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06-20-2007, 12:48 PM | #2 |
Scooby Specialist
Member#: 49978
Join Date: Dec 2003
Chapter/Region:
NESIC
Location: Shrewsbury, MA
Vehicle:2002 WRX w/ JDM STi 6spd, EJ255, VF39 & EWG |
Make sure there hasn't been any damage to the heads. Are you building it yourself or trusting it to a shop?
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06-20-2007, 12:51 PM | #3 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
reputable shop is building it.
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06-20-2007, 01:00 PM | #4 |
Scooby Specialist
Member#: 49978
Join Date: Dec 2003
Chapter/Region:
NESIC
Location: Shrewsbury, MA
Vehicle:2002 WRX w/ JDM STi 6spd, EJ255, VF39 & EWG |
Forgot to ask, why are you shelling out big money for an ARC FMIC but leaving the tranny alone?
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06-20-2007, 01:45 PM | #5 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
transmission is on the list.. just haven't decided.. i'm still doing my research
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06-20-2007, 11:23 PM | #6 |
Scooby Newbie
Member#: 120288
Join Date: Jul 2006
Location: Traverse City, MI
Vehicle:04 wrx wagon blue |
Build your heads. Look at any hybrid dyno chart and see why, it's like throwing a rock over a cliff.
At least new cams. Wrx cams will not support your turbo. I used sti cams and modded them(get a machinist to plug 4 holes on end of intake cam) I used cometic .051 to adjust compression of sti shortblock. ride5000 will be right behind me talking about "squish". I chose to have the right compression instead of right "squish" and you should too as long as you're running a bigger turbo. Arp studs. Last edited by eggpattern; 06-20-2007 at 11:28 PM. |
06-21-2007, 07:05 PM | #7 |
Scooby Specialist
Member#: 92114
Join Date: Jul 2005
Chapter/Region:
NESIC
Location: Westerly, RI
Vehicle:03 WRX (NAVY Camo) in"Special Ed." Run Group |
Are you going with a "built" shortblock (Crawford, cosworth, etc) or just a stock Subaru STi block?
Forged Pistons? STi oil pan, oil pickup, STi dipstick? Are you going to run headers because some require the STi pan for clearance. Timing Belt.... Cams, valves & valvetrain? The list can go on and on...... New oil pump and water pump? You may also need a Perrin big MAF intake... Mine did in order to properly tune it with ECUtek. |
06-21-2007, 07:23 PM | #8 |
Vendor
Member#: 133383
Join Date: Nov 2006
Chapter/Region:
SCIC
Location: Socal - 92647
Vehicle:2004 Subaru GDB STI |
wow nice plans hope to see it come to life
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06-21-2007, 07:25 PM | #9 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
I will be using
subaru oem 2.5L short block 2.5L oil pan, baffle, oil pick up, dip stick stock exhaust manifold. stock EJ20 top end (cams, valves etc) Cosworth oil pump and sti water pump |
06-21-2007, 11:18 PM | #10 |
Scooby Specialist
Member#: 136728
Join Date: Jan 2007
Chapter/Region:
MWSOC
Location: Cary, IL
Vehicle:04 PSM WRX STI Wgn FP Black 82HTZ powered |
You might be on a buget, but I recomened you swap in some cams or port your EJ20 heads. You'll see more power and quicker spoolup for your turbo, I recomened Kelford cams I heard good things about there cams
Tom |
06-22-2007, 11:04 AM | #11 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
With the amount of power i'm planning to put down (280-350 whp)
Cams seems to be a very expensive investment to get that extra few gain in spoolup. (around $800-1000) I'm trying to stay within a budget but build a reliable daily driven and weekend track warrior motor. |
06-22-2007, 12:29 PM | #12 |
Scooby Specialist
Member#: 136728
Join Date: Jan 2007
Chapter/Region:
MWSOC
Location: Cary, IL
Vehicle:04 PSM WRX STI Wgn FP Black 82HTZ powered |
Thats what i doing to with my 04 WRX Wagon. But looking to make about 400hp and still be a reliable Daily driven, road race, drag race car. it depends on the turbo i chose
are you keeping your 5spd or going 6spd? iam swaping to a 6spd |
06-22-2007, 12:35 PM | #13 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
For now i'm staying with the 5 speed.
Budget reasons. In the future i willl upgrade to PPG or 6 speed. What turbo are you thinking about to make 400 whp? |
06-22-2007, 12:46 PM | #14 |
Scooby Newbie
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Join Date: Nov 2006
Chapter/Region:
SCIC
Location: SoCal
Vehicle:2003 WrX |
have you purchased your shortblock yet? go to this website thekingofparts.com got the whole sti motor with everything wp, op, and the engine gasket set. its 2000 for the whole thing, and depending where you live i cost me total 2200. i had a budget of 3200 but i decided to be safe and get cams and a new valverain, doing the swap my self should be done by middle of next week. GL
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06-23-2007, 01:13 AM | #15 |
Scooby Specialist
Member#: 136728
Join Date: Jan 2007
Chapter/Region:
MWSOC
Location: Cary, IL
Vehicle:04 PSM WRX STI Wgn FP Black 82HTZ powered |
Right now iam looking at a rotated GT30R or somthing similar to it. If you can think of anything let me know
Tom |
06-23-2007, 09:49 AM | #16 |
Scooby Specialist
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Chapter/Region:
BAIC
Location: Sacramento, CA
Vehicle:2003 O.O AWP |
I hear rotateds aren't very good for road racing...
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06-23-2007, 02:00 PM | #17 | |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
Quote:
GT30R is definitely a good turbo. I didn't want to change to rotated setup (budget reason) I think FP Green or Deadbolt TD05/20G will satisfy my need. I'm looking for fast spool, linear power (around 300 whp). |
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07-04-2007, 04:11 PM | #18 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
Project update.
The motor is out of the car. Parts to be installed 2.5L Short block swap 2.5 Oil pan / pick up / dip stick / baffle Modified oil pump Machine the stock EJ20 head. |
07-04-2007, 04:33 PM | #19 |
RIP 3/18/1965 to 1/10/2008
Scooby Specialist Member#: 91500
Join Date: Jul 2005
Chapter/Region:
MWSOC
Location: Schaumburg/Chicago
Vehicle:hmmm sr-30+640cc=? I has teh Endless BBK. |
good for you, with the sti oil pan, I just KNOW you're going with equal/length headers, ya...?
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07-05-2007, 12:09 AM | #20 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
Nope.. i love the boxer sound.
with the 2.5L oil pan , it will maintain the oil level better at high G |
07-28-2007, 10:48 AM | #21 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
Alright so i got my EJ257 shortblock installed with all the original EJ20 components.
The car is untuned right now, just cobb stage 2 (EJ20) The car has a very rough idle. Any insight on this? i know i definitely need a tune for the ecu to properly run the ej257 Could the rough idle cause by something else? |
07-28-2007, 07:09 PM | #22 |
Scooby Newbie
Member#: 102682
Join Date: Dec 2005
Location: Woodberry, IN
Vehicle:... ripper's sister. |
Sounds like mapping to me.
Run what ever map you had for the 2.0, as fueling requirements are the same for the 2.5 as long as you stay out of boost. |
07-28-2007, 09:50 PM | #23 |
Sammo Hung
Moderator Member#: 10613
Join Date: Sep 2001
Chapter/Region:
South East
Location: N Fla / S Ga
Vehicle:2002 USDM WRX WRB |
those injectors..
maf scaling has to be adjusted injector data also has to be tinkered but you need a tune |
07-29-2007, 01:12 PM | #24 |
Scooby Specialist
Member#: 68709
Join Date: Aug 2004
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AKIC
Location: Kenai Peninsula, AK
Vehicle:2012 WRX red |
I'm thinking of doing a similar hybrid. What machine work did you do on the EJ20 head? What head gasket did you use?
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07-29-2007, 01:39 PM | #25 |
Scooby Specialist
Member#: 65623
Join Date: Jul 2004
Chapter/Region:
SCIC
Location: Walnut,CA
Vehicle:2005 05 Varis WRX 95 LS400 |
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