Engine/Power - EJ25T (STI and 2006+ WRX) Discussions about the USDM 2006+ WRX and WRX STi 2.5 liter turbo flat-four.

What Turbo to upgrade to? (2.5 using 91 octane)

Thread Tools
 
Search this Thread
 
Old 03-22-2010, 03:29 PM
  #16  
Registered User
iTrader: (3)
 
subybullet's Avatar
 
Join Date: Jul 2008
Location: TRACY
Posts: 372
Car Info: 07 STi EQ tuned / 08 LEGACY
to the oc , it doesnt matter what power numbers u have , jus as long as it gets to the ground, i dont care anymore about what my hp numbers are, i simply hit the gas and let the losers try to guess!! maybe my car was a freak motor, but either way go and get it tuned for the most power safely
subybullet is offline  
Old 03-22-2010, 03:44 PM
  #17  
I survived the Mod Challenge and all I got was this lousy title
iTrader: (12)
 
LxJLthr's Avatar
 
Join Date: Jun 2008
Location: In Mother Russia...
Posts: 4,024
Car Info: ...zeh car drives you!
Originally Posted by stupidchicken03
Damn those are some nice numbers
Thanks! It was TOO much power for daily driving if you ask me, especially since the turbo had plenty more left in it (20G I think it starts operating at its best around 22-23 psi??).

Originally Posted by ryansti
How was it for a daily driver?
At the time it was my my only ride, so it did double duty as my DD and fun car. Even with the 3-port (never got around to getting MBC) it was crazy responsive and smooth. I did have it re-tuned twice to get it how I like it, power delivery vs top end tower. I think I was in boost and had pretty much full torque around 3,200 RPM? I usually chose to use 2nd gear from dead stop when just cruising around town I am trying to look for my dyno sheet right now.

But as always, it comes down to working with the tuner to figure out what you need, how you like your car to get tuned and make the best out of the mods.

Last edited by LxJLthr; 03-22-2010 at 03:50 PM.
LxJLthr is offline  
Old 03-22-2010, 04:14 PM
  #18  
Registered User
iTrader: (6)
 
04caliwrx's Avatar
 
Join Date: Mar 2006
Location: on the way to lake tahoe to shread! turbo beast
Posts: 9,581
Car Info: 2016 WRX, 2014 lifter forester XT, 2005 JDM207 WGN
23-23 psi is a bit much for 91
04caliwrx is offline  
Old 03-22-2010, 04:38 PM
  #19  
I survived the Mod Challenge and all I got was this lousy title
iTrader: (12)
 
LxJLthr's Avatar
 
Join Date: Jun 2008
Location: In Mother Russia...
Posts: 4,024
Car Info: ...zeh car drives you!
Originally Posted by 04caliwrx
23-23 psi is a bit much for 91
Is it? I am not a tuner, so can't answer that. I was making a general statement about the turbo's capabilities/potential.
LxJLthr is offline  
Old 03-23-2010, 08:40 AM
  #20  
Churro Aficionado
Thread Starter
iTrader: (38)
 
stupidchicken03's Avatar
 
Join Date: Feb 2008
Location: IG - @thomas.teammoist
Posts: 54,640
Car Info: IG - @TEAMMOISTOFFICIAL
Originally Posted by LxJLthr
Thanks! It was TOO much power for daily driving if you ask me, especially since the turbo had plenty more left in it (20G I think it starts operating at its best around 22-23 psi??).



At the time it was my my only ride, so it did double duty as my DD and fun car. Even with the 3-port (never got around to getting MBC) it was crazy responsive and smooth. I did have it re-tuned twice to get it how I like it, power delivery vs top end tower. I think I was in boost and had pretty much full torque around 3,200 RPM? I usually chose to use 2nd gear from dead stop when just cruising around town I am trying to look for my dyno sheet right now.

But as always, it comes down to working with the tuner to figure out what you need, how you like your car to get tuned and make the best out of the mods.
Nice
stupidchicken03 is offline  
Old 03-23-2010, 08:46 AM
  #21  
Registered User
iTrader: (4)
 
Shayhan27's Avatar
 
Join Date: Aug 2008
Location: Livermore
Posts: 2,127
Car Info: LUMPY CGM 05 WRX
I am a fan of the 20g as well particularly for the power lvls you are looking for. I believe those power numbers can be done with a smaller turbo but why? You may need injectors and a fuel pump too.

I think a td05/20g probably 7 cm as it will give you more power and grunt down low where as the 8cm will give you a higher yeald in numbers but at the sacrifice of putting it higher in the rpm band.

Good lucka nd happy motoring.
Shayhan27 is offline  
Old 03-23-2010, 08:57 AM
  #22  
Registered User
iTrader: (3)
 
blkwagon's Avatar
 
Join Date: Jul 2006
Location: california
Posts: 659
Car Info: 2002 sedan sti swap high on meth
Originally Posted by subybullet
stromung custom 3 inch exhaust, helix catted downpipe, blitz induction box, halman boost controller, 1 step colder plugs, thats it!!
that had to be an agressive tune....eds dyno reads low. i made 307 and 340 with a vf and meth and built motor with ed. i know most of his 91 vf turbos are all in 290ish whp that ive seen
blkwagon is offline  
Old 03-23-2010, 11:37 AM
  #23  
Churro Aficionado
Thread Starter
iTrader: (38)
 
stupidchicken03's Avatar
 
Join Date: Feb 2008
Location: IG - @thomas.teammoist
Posts: 54,640
Car Info: IG - @TEAMMOISTOFFICIAL
Ya the numbers seemed high to me as well
stupidchicken03 is offline  
Old 03-23-2010, 10:51 PM
  #24  
Registered User
iTrader: (3)
 
subybullet's Avatar
 
Join Date: Jul 2008
Location: TRACY
Posts: 372
Car Info: 07 STi EQ tuned / 08 LEGACY
Originally Posted by blkwagon
that had to be an agressive tune....eds dyno reads low. i made 307 and 340 with a vf and meth and built motor with ed. i know most of his 91 vf turbos are all in 290ish whp that ive seen
ok there must be a misunderstanding here, ed's laptop does read low, so u have to had 20% or so to match up with high reading dynos, i merely stated the high reading dyno numbers. btw yes its aggressive but at the same time very safe, he put me at 19.5 psi, but for what i have or lack there of, my car puts down more power than some subies with way more parts applied, i guess its good for me. we shouldnt be chasing numbers anyway, jus chasing pure performance!!!
subybullet is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Chocobo87
Subaru General
6
02-12-2009 02:53 AM
AMTEXX
Engine/Power - EJ20T (pre-2006 WRX and JDM)
13
07-26-2007 01:18 PM
SoCalROB
Engine Management
5
08-17-2005 06:00 AM
Need4speed
SoCal
8
03-29-2004 11:31 PM



Quick Reply: What Turbo to upgrade to? (2.5 using 91 octane)



All times are GMT -7. The time now is 11:55 AM.