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Old 12-18-2015, 12:55 AM   #1
KinkSti
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Member#: 414850
Join Date: Mar 2015
Chapter/Region: South East
Location: South Florida
Vehicle:
2004 WRX STI
Silver

Default 2015 Fully Built BC 2.7l Stroker 1000BHP DD

For those that are and have EVER thought of stroking an EJ257 block for a substantial amount of torque and horsepower, this is the thread to be in.

I have been building my project sti for years and have read and understood a lot about subaru engines and their drivelines.

I currently own a 2004 Sti with 40k miles clean with Custom Race/Street roll cage. She's built for DD and anything else that makes driving her fun. Decided to build a Stroker and of course add sequential dogbox system with gears for my desired rev limiter which would be 7k to 8000 rpms. No more...

I have a new block with new Darton sleeves and o-ringed installed and put together by a well known and Darton Authorized shop for the sleeve installation.

Brads Performance is my Guy when it comes to building reliable yet successful race engines with over 30 years of head porting and flowing experience.

TURBO: PTE 6766 WITH T4 .96 or train scroll 1.00 REAR

Heads are currently being ported and polished for the much anticipated flow bench day! Pretty Stoked to see the cfm numbers of my heads!

My bottom end is built already.
DARTON SLEEVES (Cryo'D) and (O-ringed)
BC 2.7 liter stroker
K1 crank 83mm
102mm bore Cp piston
HD pin
Carrillo H beam rods with CARR bolts
ACL race bearings 100%
625+CA Headstuds
P and l 11mm high flow pump
KillerB Oil pan and KillerB Holy Headers!

HEADS:
Full Ferrea Valvetrain
Full Port and Polish
GSC S2 single avcs cams or night sell brand new in box that way I can get the S3s!!!

What you guys think? I want this to be the new thread for High HP stroker Engines
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Old 12-18-2015, 01:02 AM   #2
Junior2JZ
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Member#: 64908
Join Date: Jun 2004
Chapter/Region: Tri-State
Location: Tuning 8/9sec Subies all over
Vehicle:
10.8 XT+9.2@155 GR+
9.1/157mph 2015 STI

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Good luck
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Old 12-18-2015, 01:43 AM   #3
Boost is Best
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Member#: 102858
Join Date: Dec 2005
Chapter/Region: SCIC
Location: Redondo Beach
Vehicle:
99 GC

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Sub'd! Can't wait for more on the build
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Old 12-18-2015, 02:23 AM   #4
Krang
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Member#: 134272
Join Date: Dec 2006
Chapter/Region: HIIC
Location: Kahaluu, Hawaii
Vehicle:
2007 Sti, UGM
Rotated EFR 6758

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Don't you have to machine the sleeves to accept the o-ring before installing them? Decide to go with regular head gaskets?
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Old 12-19-2015, 02:50 PM   #5
TURBOTOD
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Member#: 97130
Join Date: Sep 2005
Chapter/Region: SCIC
Location: San Diego, CA
Vehicle:
2004 WRB WIDE STI
COBB/TIC/CUSCO/DSS/TSSFAB

Default

I'll be watching this closely... I want to end up going 2.65 with 8K Rev limit, paired with a nice responsive turbo with broad torque band. Somewhere in the 550whp range when complete.

Keep us updated and best of luck.

Peace
-TurboTod

P.S. If you're looking at a 7-8K rev limit, why throw a cam in it that will of course shift your power band to the right? Stay with the S2's, they are the sweet spot when paired with good head work.
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Old 12-19-2015, 08:46 PM   #6
Scuby04STi
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Join Date: Aug 2012
Chapter/Region: NWIC
Location: Portland*
Vehicle:
2004 STi GTX3076R
Rally Blue

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Quote:
Originally Posted by TURBOTOD View Post
I'll be watching this closely... I want to end up going 2.65 with 8K Rev limit, paired with a nice responsive turbo with broad torque band. Somewhere in the 550whp range when complete.

Keep us updated and best of luck.

Peace
-TurboTod

P.S. If you're looking at a 7-8K rev limit, why throw a cam in it that will of course shift your power band to the right? Stay with the S2's, they are the sweet spot when paired with good head work.
As will I . . .

I have been torn between the stroke or de-stroke on my next build. I will admit I am an rpm whore (seeing its the greatest multiplier in the whp/torque game) so have leaned towards de-stroke. But if I can see a stroker run 8k happily over time I'll go that route given the info I have seen.
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Old 05-21-2016, 11:42 PM   #7
elbertmurphy
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Member#: 268256
Join Date: Dec 2010
Chapter/Region: South East
Location: Clarksville tn
Vehicle:
2005 STI
Silver

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So does anyone have a dyno chart from their stroker build? With the options out there what kit or piece together build did you use or make?
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Old 06-18-2016, 09:16 PM   #8
wendt28
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Member#: 449180
Join Date: Jun 2016
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bc 2.7 stroker kit perrin gt3582r turbo kit perrin exhaust and fuel rails 850cc injectors stock top end went 26,000 miles on it before oil pick up fked me.

building again bc 2.7l cosworth heads gsc stage 2 cams killer header hta35r id2000 injectors

Last edited by wendt28; 06-22-2016 at 07:45 PM. Reason: img
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Old 01-26-2024, 11:12 PM   #9
93stiImperza
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Member#: 212172
Join Date: May 2009
Chapter/Region: MWSOC
Location: 312
Vehicle:
14 STI
Carbon grey balck

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Any update since?
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Old 01-29-2024, 04:12 PM   #10
JTH83
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awesome
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Old 01-30-2024, 10:54 PM   #11
pridian
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Join Date: Jan 2024
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it looks amazing! However, I still feel it miss something but I cannot tell what it is, do you want to update more?

Last edited by pridian; 01-31-2024 at 03:09 AM.
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