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Old 10-23-2021, 09:47 PM   #1
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default 741AWHP stock block 20 STI

Event: Dyno pull
Location: SLC, Utah
Ambient Temp: 60
Elevation: 4300
Weather: Sunny
Track and Conditions: Dyno room
Tires: 245/35R19 “ stock “

Car: 2020 Suabru STI
Tuner: Mikey Botti
Dyno Info: DynoJet
Transmission: 6spd stock gearset ( Comp twin clutch )
Gear: 4th
Peak HP at RPM: 750 @6960
Peak Torque at RPM: 625 @ 6060
Baseline hp/tq for a stock on same dyno: Unknown
Target Boost: 34psi
Target AFR:
Fuel: E85

Engine/Power Modifications:
ETS 6870 1.05 A/R housing
Rotated turbo setup
ETS V2 exhaust manifold
ETS 46mm external wastegate with 19.5 pound spring
Cobb Titanium Exhaust
Cobb 4 bar new version
Grimmspeed EBCS
Process West " street version " intake manifold
Boomba 75mm throttle body
3mm phenolic spacers
IAG TGV deletes
EGR deletes
Air pump delete
ID 2600x injectors
Radium fuel rails with fuel pulse dampeners
IAG pickup and baffle
IAG V3 AOS comp in black
Cobb flex fuel
Cobb AP
Cobb fuel pressure sensor
Cobb FMIC with custom piping
TIAL Q BOV
IWire speed density harness
IWire rear 02 delete for Wideband AFR
GM IAT sensor
Radium dual Walbro 450 in tank fuel pumps rated for E
Aeromotive fuel pressure regulator
-8 feed and -6 return fuel lines
Hoobs switch W/ AEM sensor
KoyoRad aluminum racing radiator

Driveline Modifications: Stock

Suspension Modifications: STI pink springs

So this past year I have been building up my car and first was looking to crack 500awhp. Well that wasn't enough so I hired Mike Botti to etune my car and we ended up at 600awhp. Granted this is all on E85 lol, so here we are a few months later. I hired Taylor Curtis of Taylordtuning ( friends with Josh Bader ) and let me tell you we ended up with 741AWHP.

Update April 7th 2022: My latest revision with Mike Botti with 34psi. Street map 40psi with estimated 875whp

https://youtu.be/tStLVVgRa3s














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Last edited by gtlyearsley; 04-10-2022 at 02:07 PM.
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Old 10-24-2021, 12:05 AM   #2
user1029
Scooby Specialist
 
Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

As a long time esteemed member of the Subaru community, I approve of this build
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Old 10-24-2021, 12:08 AM   #3
user1029
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Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

Two cheap modifications that will gain you another 70-80whp

1. Exhaust bypass with EWG
https://forums.nasioc.com/forums/showpost.php?p=46416698&postcount=1

2. Blox racing velocity stack with a long intake. Having fresh cold air beats a shorter intake tract sucking hot air

Thank me later
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Old 10-24-2021, 12:13 AM   #4
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by user1029 View Post
Two cheap modifications that will gain you another 70-80whp

1. Exhaust bypass with EWG
https://forums.nasioc.com/forums/sho...98&postcount=1

2. Blox racing velocity stack with a long intake. Having fresh cold air beats a shorter intake tract sucking hot air

Thank me later

Interesting… so that paired with the normal EWG?
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Old 10-24-2021, 12:14 AM   #5
Fierysun
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Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

Default

Nice power! But what's up with the cartoon slammed camber?
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Old 10-24-2021, 12:17 AM   #6
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by Fierysun View Post
Nice power! But what's up with the cartoon slammed camber?

It’s show and go bro! I know the camber will get all the haters
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Old 10-24-2021, 12:22 AM   #7
Fierysun
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Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

Default

Quote:
Originally Posted by gtlyearsley View Post
It’s show and go bro! I know the camber will get all the haters
Not hating, but seriously, you know it's cartoon.
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Old 10-24-2021, 12:24 AM   #8
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by Fierysun View Post
Not hating, but seriously, you know it's cartoon.

It’s not everyone’s cup of tea lol… that’s hard work to get wheels that should NEVER fit a Subaru like that lol
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Old 10-24-2021, 12:27 AM   #9
Fierysun
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Member#: 82745
Join Date: Mar 2005
Chapter/Region: SCIC
Location: So Cal
Vehicle:
2005 Subaru STI
2003 EJ207 S204 Wagon

Default

Quote:
Originally Posted by gtlyearsley View Post
It’s not everyone’s cup of tea lol… that’s hard work to get wheels that should NEVER fit a Subaru like that lol
I totally get it...
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Old 10-24-2021, 12:32 AM   #10
K3rm1tth3fr0g
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Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default

Quote:
Originally Posted by user1029 View Post
Two cheap modifications that will gain you another 70-80whp

1. Exhaust bypass with EWG
https://forums.nasioc.com/forums/sho...98&postcount=1

2. Blox racing velocity stack with a long intake. Having fresh cold air beats a shorter intake tract sucking hot air

Thank me later

Was going to mention velocity stack

Although that 257 doesn't need any more power LOL

My money's on it blowing up within 30K.
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Old 10-24-2021, 12:32 AM   #11
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by Fierysun View Post
I totally get it...

To be honest I couldn’t drive that car as a daily. The air ride is fantastic tho!
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Old 10-24-2021, 12:35 AM   #12
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by K3rm1tth3fr0g View Post
Was going to mention velocity stack

Although that 257 doesn't need any more power LOL

My money's on it blowing up within 30K.

I have the ETS stack I just switched it out cuz it wasn’t eye appealing to me.
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Old 10-24-2021, 12:59 AM   #13
user1029
Scooby Specialist
 
Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

Quote:
Originally Posted by gtlyearsley View Post
Interesting… so that paired with the normal EWG?
Yup have fun with the open dump + open exhaust sound

Your 3” exhaust is a restriction at those power levels. It costs lots of money to do 4” exhaust and it might be too loud. Therefore the wastegate exhaust cutout is the most economical solution for massive power gains without the noise and cost
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Old 10-24-2021, 01:05 AM   #14
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by user1029 View Post
Yup have fun with the open dump + open exhaust sound

Your 3” exhaust is a restriction at those power levels. It costs lots of money to do 4” exhaust and it might be too loud. Therefore the wastegate exhaust cutout is the most economical solution for massive power gains without the noise and cost

Yes I copy that! So what spring would you use for the dump to open?!
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Old 10-24-2021, 08:09 AM   #15
user1029
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Member#: 57064
Join Date: Mar 2004
Vehicle:
2008 STi IAG built
HTA86 E85 Kel272s Cos IM

Default

15psi spring (opens once turbo hits 15psi) if you want to terrorize your local Main Street without speeding then go with the 7psi spring

You will definitely need a retune
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Old 10-24-2021, 09:05 AM   #16
KillerBMotorsport
NASIOC Vendor
 
Member#: 198281
Join Date: Dec 2008
Chapter/Region: MAIC
Location: Virginia
Vehicle:
2005 WRX/STi
WRB of course

Default

Bigger exhaust, and either open of ideally velocity stack.

In general terms, usually, but not always the case...

If boost goes up and no more power, exhaust side is the choke.

If boost does not go up, it's a cold side restriction.
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Old 10-24-2021, 09:22 AM   #17
guciodog11
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Member#: 160264
Join Date: Sep 2007
Chapter/Region: Tri-State
Location: S.I, NY
Vehicle:
95 20G'd EJ257 GM6

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"Virtual Dyno"
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Old 10-24-2021, 10:51 AM   #18
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by user1029 View Post
15psi spring (opens once turbo hits 15psi) if you want to terrorize your local Main Street without speeding then go with the 7psi spring

You will definitely need a retune

I’m ok with that lol
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Old 10-24-2021, 10:53 AM   #19
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default 741AWHP stock block 20 STI

Quote:
Originally Posted by KillerBMotorsport View Post
Bigger exhaust, and either open of ideally velocity stack.

In general terms, usually, but not always the case...

If boost goes up and no more power, exhaust side is the choke.

If boost does not go up, it's a cold side restriction.

Well it made more boost at one point, but then we advanced the AVCS and made more power and faster spool, but that’s when we’d add more WGDC and nothing. Granted it’s spicy timing and a decent AFR lol

And the last few pulls I even took off the air filter so it was just the open turbo and still nothing more
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Old 10-24-2021, 10:54 AM   #20
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by guciodog11 View Post
"Virtual Dyno"

Just being honest man no point in lying although it’s not that far off! I mean how much power do you see a 6466 making @37.5 psi
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Old 10-24-2021, 11:09 AM   #21
K3rm1tth3fr0g
Scooby Specialist
 
Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default

Quote:
Originally Posted by gtlyearsley View Post
I mean how much power do you see a 6466 making @37.5 psi
Enough to blow up a stock block
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Old 10-24-2021, 11:17 AM   #22
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by K3rm1tth3fr0g View Post
Enough to blow up a stock block

Oh definitely lol…. But then again there’s built short blocks that don’t last very long that cost 2-3x of factory unit! So the return on investment wasn’t so great then either. Idk these type RA motors are stronger then people give credit, I mean mine has a good 20-30 hits above 600whp and 10ish above 700whp and still goin lol. I’m far beyond impressed

Josh Bader just tuned a stock long block @812 whp and JR tuned one @814whp recently
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Old 10-24-2021, 11:23 AM   #23
K3rm1tth3fr0g
Scooby Specialist
 
Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default

Quote:
Originally Posted by gtlyearsley View Post
Oh definitely lol***8230;. But then again there's built short blocks that don't last very long that cost 2-3x of factory unit! So the return on investment wasn't so great then either. Idk these type RA motors are stronger then people give credit, I mean mine has a good 20-30 hits above 600whp and 10ish above 700whp and still goin lol. I'm far beyond impressed

Josh Bader just tuned a stock long block @812 whp and JR tuned one @814whp recently
The rods, crank, bearings and case are all the same between your motor, a standard 257 and a 255. The only difference is between these motors is the piston (and obviously the heads). And, on top of that, the only difference between the regular 257 and the RA 257 is wrist pin location and mounting method.

I would be willing to bet its the fact that the short-block is brand new + all your over the top mods and tuning vs the actual RA short-block being significantly stronger. Lots of tuner's I've spoken to agree with me on this, the RA block is overhyped.

EJ pistons aren't known for breaking at the wrist pin so this structural change shouldn't really change much in terms of overall power and torque capabilities.

Let us know when she let's go, eh?
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Old 10-24-2021, 11:28 AM   #24
gtlyearsley
Scooby Newbie
 
Member#: 501308
Join Date: May 2019
Chapter/Region: RMIC
Location: Instagram: jeremy_yearsley
Vehicle:
2020 STI
741awhp (Mikeytuned)

Default

Quote:
Originally Posted by K3rm1tth3fr0g View Post
The rods, crank, bearings and case are all the same between your motor, a standard 257 and a 255. The only difference is between these motors is the piston (and obviously the heads). And the only difference between the regular 257 and the RA 257 is wrist pin location and mounting method.

I would be willing to bet its the fact that the short-block is brand new + all your over the top mods and tuning vs the actual RA short-block being significantly stronger. Lots of tuner's I've spoken to agree with me on this, the RA block is overhyped.

EJ pistons aren't known for breaking at the wrist pin so this structural change shouldn't really change much in terms of overall power and torque capabilities.

Let us know when she let's go, eh?

Yes definitely!

Everything about my car only has few thousand miles lol… so if it was to go @30K well that’s another 8 years away atleast.

I definitely didn’t go this route for reliability or dependability. I just wanted bragging rights ha
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Old 10-24-2021, 11:42 AM   #25
K3rm1tth3fr0g
Scooby Specialist
 
Member#: 508105
Join Date: Nov 2019
Chapter/Region: NWIC
Location: Greater Seattle Area
Vehicle:
Link G4X flex tuned
02' EJ205 20G 6MT wagon

Default

Definitely understand bragging rights LOL

Be curious to know how this setup performs in the quarter mile if it wasn't running on rubber bands
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