Build 2.0 or go with 2.5 shortblock - Subaru WRX Forum
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#1 Old 07-03-2009, 11:42 PM
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Build 2.0 or go with 2.5 shortblock

Yoooo whats up subby people.

Im debating on building this POS 2.0 in my 02' , or spending the money and going with the 2.5 shortblock. I havent been able to find out how much power a built 2.0 can hold, and I know the 2.0 block is doo doo.

And I really dont care if this has been discussed 1000 times, I cant find it and also Im lonely while my wife is out prob getting impregnated by another dude.

So.. thoughts?


ps.. I just sold my srt4, putting down 450hp 445tq on stock motor, why cant subbys do this???
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#2 Old 07-04-2009, 10:01 AM
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Who said they cant put down that much power? Its been done before, maybe takes a little more money or time, but you are comparing apples to oranges. The 2.0 actually revs a little higher than the 2.5, but doesnt make the torque the 2.5 can. But anyways, what is your intended use for the car? Dyno queen, straight line, Auto-x? What do you have done to the car? What is your budget?

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#3 Old 07-04-2009, 11:54 AM
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Quote:
Originally Posted by iboost26 View Post


ps.. I just sold my srt4, putting down 450hp 445tq on stock motor, why cant subbys do this???

at what rpm(s) did your peak numbers occur?

Matt
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#4 Old 07-04-2009, 03:33 PM
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I personally have a built 2.0 and have a reliable 425whp every day ...if you want advise for a 2.0 build just PM me

FP GT35R MoTeC M800 AndrewTech PPG'd Wagon - 513AWHP
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#5 Old 07-04-2009, 03:53 PM
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I was the same position about a year ago. I choose to build a 2.5L hybrid (EJ257 using 2.0L/EJ205 heads) and I love it. IMHO a 2.5L block with forged pistons, a mild cam upgrade (Kelford 264s or Tomei 252s), valve springs, retainers, etc is the way to go for a strongass block.

My build revs to 7500 rpm, holds power to redline due to my Kelford 264/264 cams, and I love it....its a blast to drive. I actually live in Cooper City (about 1 hour south of you), but my sister lives in Palm Beach Gardens so I am up in your area from time to time. Maybe we could set something up if your ever down this way or next time I come up and I could take you for a drive. B/c the best way to know what you really want is to see/feel it 1st hand.

Honestly, you really cannot go wrong with either a built 2.0 or 2.5L both can be great with the right turbo/setup. But, for me I will take the torque of the 2.5L all day, particularly moving in and out of traffic.
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#6 Old 07-04-2009, 06:16 PM
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ive heard srt4 can make so much more power than us so much easier..why is that?
im still not giving up on my subbie tho..
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#7 Old 07-04-2009, 09:08 PM
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Quote:
Originally Posted by c2bcoolwrx View Post
I was the same position about a year ago. I choose to build a 2.5L hybrid (EJ257 using 2.0L/EJ205 heads) and I love it. IMHO a 2.5L block with forged pistons, a mild cam upgrade (Kelford 264s or Tomei 252s), valve springs, retainers, etc is the way to go for a strongass block.

My build revs to 7500 rpm, holds power to redline due to my Kelford 264/264 cams, and I love it....its a blast to drive. I actually live in Cooper City (about 1 hour south of you), but my sister lives in Palm Beach Gardens so I am up in your area from time to time. Maybe we could set something up if your ever down this way or next time I come up and I could take you for a drive. B/c the best way to know what you really want is to see/feel it 1st hand.

Honestly, you really cannot go wrong with either a built 2.0 or 2.5L both can be great with the right turbo/setup. But, for me I will take the torque of the 2.5L all day, particularly moving in and out of traffic.
sounds good man, ill pm you my number
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#8 Old 07-04-2009, 09:11 PM
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Quote:
Originally Posted by wrxecm View Post
ive heard srt4 can make so much more power than us so much easier..why is that?
im still not giving up on my subbie tho..
no idea man. with exhaust, intake and wastegate actuator, (we dont use boost controllers on srt4s) and a safc neo, i made 300whp 325tq stock turbo, stock fuel setup.


all that cost less then 1000 dolla.. but remember its fwd, i spun all the way thru 3rd and it really gets old after a while unless you like doing 80mph rolls all the time
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#9 Old 07-04-2009, 09:15 PM
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Originally Posted by newtothegame View Post
Who said they cant put down that much power? Its been done before, maybe takes a little more money or time, but you are comparing apples to oranges. The 2.0 actually revs a little higher than the 2.5, but doesnt make the torque the 2.5 can. But anyways, what is your intended use for the car? Dyno queen, straight line, Auto-x? What do you have done to the car? What is your budget?
Ive just heard the 2.0 has a weak block.

Mostly just drag racing it. Right now all it has is cobb stage 2, full turbo back, uppipe, MBC, Intake.

My other wrx had pink stis, gp moto headers, vf22, walboro 255, utec managment, full turbo back and uppipe, turboxs topmount.. and other stuff and all that thing would do is 280 to the wheels... i didnt get it

as for budget, i would say around 3-4k for now.
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#10 Old 07-04-2009, 09:16 PM
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I personally have a built 2.0 and have a reliable 425whp every day ...if you want advise for a 2.0 build just PM me
will do sir, appreciate it
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#11 Old 07-04-2009, 09:19 PM
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Originally Posted by sleepr View Post
at what rpm(s) did your peak numbers occur?
I have the video of my pump gas run... i have to find the one with 110

50 trim srt4
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#12 Old 07-05-2009, 10:55 AM
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#13 Old 07-05-2009, 11:09 AM
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Quote:
Originally Posted by iboost26 View Post
Ive just heard the 2.0 has a weak block.

Mostly just drag racing it. Right now all it has is cobb stage 2, full turbo back, uppipe, MBC, Intake.

My other wrx had pink stis, gp moto headers, vf22, walboro 255, utec managment, full turbo back and uppipe, turboxs topmount.. and other stuff and all that thing would do is 280 to the wheels... i didnt get it

as for budget, i would say around 3-4k for now.
I would start building a block and a tranny then if its meant for straight line racing. Especially the transmission. You just mentioned in another post about the srt4 being FWD, much less drivetrain loss for one, the type of dyno, so many variables when just comparing numbers. The WRX might not have as big a number, but it will be a more rounded car than any FWD or RWD car will be IMHO.

Joshua
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Stage 2 2005 WRX
Cobbtuning.com"
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#14 Old 07-05-2009, 03:38 PM
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it really is preference, the 2.5 will always have more torque....but that doesnt mean that the 2.0 doesnt create great numbers....what were you looking into doing a stock 2.5 swap vs building the 2.0? if so build your 2.0 and throw a 20g on there and you will be happy....problem with the 2.5 is the extra torque strains the stock transmission especially with a grippy clutch so becareful. and a tranny for a subaru is $$...i held around 340whp with a 4puck unsprung on a built 2.0 with minor head work.
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#15 Old 07-05-2009, 05:50 PM
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Originally Posted by wrxshotta View Post
it really is preference, the 2.5 will always have more torque....but that doesnt mean that the 2.0 doesnt create great numbers....what were you looking into doing a stock 2.5 swap vs building the 2.0? if so build your 2.0 and throw a 20g on there and you will be happy....problem with the 2.5 is the extra torque strains the stock transmission especially with a grippy clutch so becareful. and a tranny for a subaru is $$...i held around 340whp with a 4puck unsprung on a built 2.0 with minor head work.
Very true, it is not whp that kills the tranny but the torque and shock load. Also, driving like an *** and launching/drag racing all over the place will kill a 5-speed pretty quick too. It is all in how you drive and slip the clutch.
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