300+ hp on stock wrx trans.

BugeyePB Rex · 10-04-2009, 11:45 PM

I've done the reading and all that good stuff all over the forums and wanted to know personally how many guys here in swic have setups around 300whp on the stock wrx trans (late 03 to 07) and are not having issues. My trans has not seen any serious mods aside from my recent cobb stage 2 and I will be switching to a vf48 here fairly soon. Generally speaking, will the trans take the power provided I shift conservatively? Also concerned about the clutch needing to be replaced too. Current mileage is around 40k on it. Thanks in advance for input.

- Ryan

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ChandlerWRX06 · 10-05-2009, 12:16 AM

Honestly is all in how you drive, use your clutch as a fuse for the system and you'll be fine. You wont make crazy power on a VF48 dont beat on it and you'll be fine. . .

and thats from someone that swapped to a 6spd lol. I just like the feel of the 6mt better.

BugeyePB Rex · 10-05-2009, 12:49 AM

Hah, comforting knowing you went to a 6mt. And apparently 300whp is an attainable goal according to Clark Turner. When I asked him how much this system had the potential to put down with the supporting mods I'll have that's the figure he claimed. What about the stock clutch...? Think it'll hold or should I expect to replace it with a new one pretty soon?

Evil Imports · 10-05-2009, 01:45 AM

i used to have a 02 wrx with 289whp on the 5 speed and no problems

KP · 10-05-2009, 01:47 AM

Don't try and shift like you're driving a mustang and chirping 2nd, and you should be alright.

PS PM KahunaKing and ask him his thoughts on 5 speed strength. And ask him how many launches he's put through his.

v8eaterWRX · 10-05-2009, 11:23 AM

I ran over 300whp on a stock 05 5mt for a few years without any issue. In fact that same tranny is now in another car with over 300whp with still no issue. Its all in the driver to some extent.

SubeSTIle · 10-05-2009, 01:10 PM

yeah, the 5mt in the foz that had the same vf turbo your going to be running handled the power just fine on and off the track. though im not sure how much difference there is btw the foz 4.44 gears and the wrx gears

BugeyePB Rex · 10-05-2009, 04:50 PM

Awesome info everyone thanks for the input. I'm not an autoxer but I've been told my shifting is rather smooth so I don't think the shock to the trans will be much of an issue. Stock clutch ok for the power then.... or should I plan on changing it out soon?

furryfootstool · 10-05-2009, 05:07 PM

all depends on your driving. i've heard people dropping their trans just getting on the highway. who knows, but there are plenty of people with 300hp with stock trans. i have my stock trans and clutch at 127k with a 16g. if you don't dog it too much, it could survive, but if you want piece of mind, go with a 6spd

SubeSTIle · 10-05-2009, 05:12 PM

oe clutch should be fine.

ChandlerWRX06 · 10-05-2009, 06:50 PM

Quote:

Originally Posted by BugeyePB Rex

Hah, comforting knowing you went to a 6mt. And apparently 300whp is an attainable goal according to Clark Turner. When I asked him how much this system had the potential to put down with the supporting mods I'll have that's the figure he claimed. What about the stock clutch...? Think it'll hold or should I expect to replace it with a new one pretty soon?

I would be suprised to see 300whp on a VF48 with pump gas to be honest.

Clark Knows his stuff, but I would expect to see close to 300 but on a 2.0L and a vf48 (which is a 39 with a bigger hotside) 280 to 290whp is a closer to top HP. I made a little over 280whp with my vf39 on AZ91oct on my 2.5L.

Regardless, your trans should be fine so long as you dont drive like an R-tard

oh PS: OEM clutch would be fine, but if youre at 40K on it I would plan to replace it soonish.

Role Reversal · 10-05-2009, 07:29 PM

i am running 366 awhp on an 05 5mt

AWDshenanigans · 10-05-2009, 09:15 PM

i put 370whp to my old 04 wrx with the stock trans. it was fine but when i replaced the clutch with a race clutch it blew up. then i got a full RA drivetrain

KP · 10-05-2009, 09:43 PM

Quote:

Originally Posted by ChandlerWRX06

I would be suprised to see 300whp on a VF48 with pump gas to be honest.

Clark Knows his stuff, but I would expect to see close to 300 but on a 2.0L and a vf48 (which is a 39 with a bigger hotside) 280 to 290whp is a closer to top HP. I made a little over 280whp with my vf39 on AZ91oct on my 2.5L.

....

Brandon did it on a Cobb AP Stage 2 map on FAT's last dyno day. Not saying it's common, but saying it's possible

BugeyePB Rex · 10-05-2009, 10:03 PM

Quote:

Originally Posted by ChandlerWRX06

I would be suprised to see 300whp on a VF48 with pump gas to be honest.

Clark Knows his stuff, but I would expect to see close to 300 but on a 2.0L and a vf48 (which is a 39 with a bigger hotside) 280 to 290whp is a closer to top HP. I made a little over 280whp with my vf39 on AZ91oct on my 2.5L.

Regardless, your trans should be fine so long as you dont drive like an R-tard

oh PS: OEM clutch would be fine, but if youre at 40K on it I would plan to replace it soonish.

I thought 300 was a bit high myself... but hey if he can pull it off then great! I know I've seen these numbers from the 2.5's but I'm curious to see how high he can get the 2.0. Hoping for a bit better spool though as the 48 is a bit more free flowing (minimal I know, but eh, everything helps). I'll get some numbers posted once I have everything set up. NAU autoclub is having a dyno day down at Goodspeed on Nov. 17th so I'll know exactly what I'm putting down by then.

KP · 10-05-2009, 10:19 PM

The only difference in the 2.5 and 2.0 is going to be spool. The heads flow very close to the same and it's still the same turbo.

ChandlerWRX06 · 10-06-2009, 12:05 AM

And the 48's bigger hotside should help on the topend. . . like i said, Clark knows his shyte to say the least lol.

Im interested in seeing my new set-up's numbers, i might have to dyno again
(then again after Goodspeed's new software on the maha ill probably net lower than my first 363whp with a frontmount, ewg, and higher boost now lol)

KP · 10-06-2009, 02:07 AM

Quote:

Originally Posted by ChandlerWRX06

And the 48's bigger hotside should help on the topend. . . like i said, Clark knows his shyte to say the least lol.

Im interested in seeing my new set-up's numbers, i might have to dyno again
(then again after Goodspeed's new software on the maha ill probably net lower than my first 363whp with a frontmount, ewg, and higher boost now lol)

Dyno on a Mustang so you can accurately compair numbers to Ken, Mark, and Erik.

kpluiten · 10-06-2009, 02:35 AM

Do Eet!

sh1ftn · 10-06-2009, 04:26 AM

is there any difference between the '02 wrx tranny compare to the later wrx models?

BugeyePB Rex · 10-07-2009, 01:04 AM

Quote:

Originally Posted by sh1ftn

is there any difference between the '02 wrx tranny compare to the later wrx models?

Yes. The 02's and early 03's have weaker gears. The late 03's and up got the wider RA style gears. Less prone to grenading. I double checked my VIN and made sure I had the late year 03. Woot!

AWDboostADDICT · 10-07-2009, 02:07 AM

Quote:

Originally Posted by BugeyePB Rex

I've done the reading and all that good stuff all over the forums and wanted to know personally how many guys here in swic have setups around 300whp on the stock wrx trans (late 03 to 07) and are not having issues. My trans has not seen any serious mods aside from my recent cobb stage 2 and I will be switching to a vf48 here fairly soon. Generally speaking, will the trans take the power provided I shift conservatively? Also concerned about the clutch needing to be replaced too. Current mileage is around 40k on it. Thanks in advance for input.

- Ryan

I am vf30 + supporting mods, definantly making 300-320 whp.
my stock EARLY 02 trans lasted 180k, 60k of that was on the current 300-320 whp setup, if you treat it nice, it will treat you nice.

fastnoypi · 10-07-2009, 02:25 AM

Quote:

Originally Posted by AWDboostADDICT

I am vf30 + supporting mods, definantly making 300-320 whp.
my stock EARLY 02 trans lasted 180k, 60k of that was on the current 300-320 whp setup, if you treat it nice, it will treat you nice.

+1

my early 02 trans was nearly perfect before sold it at 100k+, every mile past 3k saw 300-350 whp ..i hear its still running in PA. The stock exedy disc was forgiving enough to keep everything intact, anything with more grip would have killed it.

AWDboostADDICT · 10-07-2009, 02:33 AM

Quote:

Originally Posted by fastnoypi

+1

my early 02 trans was nearly perfect before sold it at 100k+, every mile past 3k saw 300-350 whp ..i hear its still running in PA. The stock exedy disc was forgiving enough to keep everything intact, anything with more grip would have killed it.

I think mine finally gave way becuase of my quite unforgivable act 6 puck

DerickRyoung · 10-07-2009, 10:27 PM

only speaking on behalf of the possible clutch upgrade...I replaced my worn out clutch at 80k, stock trans w/ updated gears. I have an act clutch w/ the heavy duty pressure plate, oem-ish street disc (spring) and lighter flywheel (14lbs). Its actually a modified exedy clutch, regardless. I love it, but most would hate it. Feels like an old muscle car when using clutch, but my left leg is now buff and I am used to it. The flywheel is weird daily driving but I got used to it and adapted. I think it was worth it but most curse me for it. I would prolly look into exedy next time around.
I have never smelled the disc when I launch it after the upgrade.

10-04-2009, 11:45 PM	#1
BugeyePB Rex Scooby Newbie Member#: 138915 Join Date: Jan 2007 Chapter/Region: SWIC Location: Flagstaff, AZ Vehicle: 2003 WRB WRX Vf48 Tuned @ FAT by Snail Perf	300+ hp on stock wrx trans. I've done the reading and all that good stuff all over the forums and wanted to know personally how many guys here in swic have setups around 300whp on the stock wrx trans (late 03 to 07) and are not having issues. My trans has not seen any serious mods aside from my recent cobb stage 2 and I will be switching to a vf48 here fairly soon. Generally speaking, will the trans take the power provided I shift conservatively? Also concerned about the clutch needing to be replaced too. Current mileage is around 40k on it. Thanks in advance for input. - Ryan * Registered users of the site do not see these ads.

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10-05-2009, 12:16 AM	#2
ChandlerWRX06 Scooby Specialist Member#: 184206 Join Date: Jul 2008 Chapter/Region: SWIC Location: Fliessem, Germany Vehicle: 2013 X1 sDrive 28i gray	Honestly is all in how you drive, use your clutch as a fuse for the system and you'll be fine. You wont make crazy power on a VF48 dont beat on it and you'll be fine. . . and thats from someone that swapped to a 6spd lol. I just like the feel of the 6mt better.

10-05-2009, 12:49 AM	#3
BugeyePB Rex Scooby Newbie Member#: 138915 Join Date: Jan 2007 Chapter/Region: SWIC Location: Flagstaff, AZ Vehicle: 2003 WRB WRX Vf48 Tuned @ FAT by Snail Perf	Hah, comforting knowing you went to a 6mt. And apparently 300whp is an attainable goal according to Clark Turner. When I asked him how much this system had the potential to put down with the supporting mods I'll have that's the figure he claimed. What about the stock clutch...? Think it'll hold or should I expect to replace it with a new one pretty soon?

10-05-2009, 01:45 AM	#4
Evil Imports Scooby Guru Member#: 14732 Join Date: Jan 2002 Chapter/Region: SWIC Location: Global	i used to have a 02 wrx with 289whp on the 5 speed and no problems

10-05-2009, 01:47 AM	#5
KP Scooby Guru Member#: 147637 Join Date: Apr 2007 Chapter/Region: International Location: PM SkimSTI for FREEEEEEEEEEEEE Vehicle: HJ's Ask Hobbs. He knows.	Don't try and shift like you're driving a mustang and chirping 2nd, and you should be alright. PS PM KahunaKing and ask him his thoughts on 5 speed strength. And ask him how many launches he's put through his.

10-05-2009, 11:23 AM	#6
v8eaterWRX Scooby Guru Member#: 108547 Join Date: Feb 2006 Chapter/Region: SWIC Location: boondock camping Vehicle: 2017 Tundra 1794 Lifted, Armored, Muddy AF	I ran over 300whp on a stock 05 5mt for a few years without any issue. In fact that same tranny is now in another car with over 300whp with still no issue. Its all in the driver to some extent.

10-05-2009, 01:10 PM	#7
SubeSTIle Scooby Specialist Member#: 80736 Join Date: Feb 2005 Chapter/Region: SWIC Location: West Valley, AZ Vehicle: 1999 FXT White E85 is for girls	yeah, the 5mt in the foz that had the same vf turbo your going to be running handled the power just fine on and off the track. though im not sure how much difference there is btw the foz 4.44 gears and the wrx gears

10-05-2009, 04:50 PM	#8
BugeyePB Rex Scooby Newbie Member#: 138915 Join Date: Jan 2007 Chapter/Region: SWIC Location: Flagstaff, AZ Vehicle: 2003 WRB WRX Vf48 Tuned @ FAT by Snail Perf	Awesome info everyone thanks for the input. I'm not an autoxer but I've been told my shifting is rather smooth so I don't think the shock to the trans will be much of an issue. Stock clutch ok for the power then.... or should I plan on changing it out soon?

10-05-2009, 05:07 PM	#9
furryfootstool Scooby Specialist Member#: 200526 Join Date: Jan 2009 Chapter/Region: SWIC Location: Queen Creek	all depends on your driving. i've heard people dropping their trans just getting on the highway. who knows, but there are plenty of people with 300hp with stock trans. i have my stock trans and clutch at 127k with a 16g. if you don't dog it too much, it could survive, but if you want piece of mind, go with a 6spd

10-05-2009, 05:12 PM	#10
SubeSTIle Scooby Specialist Member#: 80736 Join Date: Feb 2005 Chapter/Region: SWIC Location: West Valley, AZ Vehicle: 1999 FXT White E85 is for girls	oe clutch should be fine.

10-05-2009, 07:29 PM	#12
Role Reversal Scooby Newbie Member#: 191885 Join Date: Oct 2008 Chapter/Region: RMIC Location: Hill AFB, UT Vehicle: 2000 Forester	i am running 366 awhp on an 05 5mt

10-05-2009, 09:15 PM	#13
AWDshenanigans Scooby Specialist Member#: 197856 Join Date: Dec 2008 Chapter/Region: SWIC Location: 'merikuh Vehicle: 2010 FJ Cruiser Sandstorm	i put 370whp to my old 04 wrx with the stock trans. it was fine but when i replaced the clutch with a race clutch it blew up. then i got a full RA drivetrain

10-05-2009, 10:19 PM	#16
KP Scooby Guru Member#: 147637 Join Date: Apr 2007 Chapter/Region: International Location: PM SkimSTI for FREEEEEEEEEEEEE Vehicle: HJ's Ask Hobbs. He knows.	The only difference in the 2.5 and 2.0 is going to be spool. The heads flow very close to the same and it's still the same turbo.

10-06-2009, 12:05 AM	#17
ChandlerWRX06 Scooby Specialist Member#: 184206 Join Date: Jul 2008 Chapter/Region: SWIC Location: Fliessem, Germany Vehicle: 2013 X1 sDrive 28i gray	And the 48's bigger hotside should help on the topend. . . like i said, Clark knows his shyte to say the least lol. Im interested in seeing my new set-up's numbers, i might have to dyno again (then again after Goodspeed's new software on the maha ill probably net lower than my first 363whp with a frontmount, ewg, and higher boost now lol)

10-06-2009, 02:35 AM	#19
kpluiten Scooby Guru Member#: 120273 Join Date: Jul 2006 Chapter/Region: SWIC Location: AZ Vehicle: 06 WRBWRXWGN Now with 100% more Spec-C	Do Eet!

10-06-2009, 04:26 AM	#20
sh1ftn Scooby Newbie Member#: 166645 Join Date: Dec 2007 Chapter/Region: VIC Vehicle: 02 WRX	is there any difference between the '02 wrx tranny compare to the later wrx models?

10-07-2009, 10:27 PM	#25
DerickRyoung Scooby Specialist Member#: 178050 Join Date: Apr 2008 Chapter/Region: SWIC Location: Arizona + Indiana Vehicle: 02 hybrid-wrx psm	only speaking on behalf of the possible clutch upgrade...I replaced my worn out clutch at 80k, stock trans w/ updated gears. I have an act clutch w/ the heavy duty pressure plate, oem-ish street disc (spring) and lighter flywheel (14lbs). Its actually a modified exedy clutch, regardless. I love it, but most would hate it. Feels like an old muscle car when using clutch, but my left leg is now buff and I am used to it. The flywheel is weird daily driving but I got used to it and adapted. I think it was worth it but most curse me for it. I would prolly look into exedy next time around. I have never smelled the disc when I launch it after the upgrade.