Most Hp on stock wrx heads

13secwrx · 07-13-2005, 04:11 PM

I have stockers right now and I wanna know what the limits of the heads will be ?...I currently have an ej257 w/supporting mods and an sz49. I am prolly looking at a 35r w/the .082 a/r ...

Whats the max hp that you have seen on the stock cams and heads...

Thanks

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Scoobs2002 · 07-13-2005, 05:06 PM

Ive seen a wrx with 2.5 block and wrx heads (t3/t4 garrett) make 390 whp pump gas 18.5 psi...dont know about race fuel, but im sure with the 35R you can make the 400 mark on pump.

Scoobs

Performance Driven · 07-13-2005, 05:08 PM

how about a 2.35 with stock heads plus gt35
that put 395 whp on our DynaPack..

turbo2ner · 07-13-2005, 07:26 PM

Little bigger turbo and some nitrous can do wonders.

sonicowrx03 · 07-13-2005, 07:28 PM

John woods from www.xmotorsports.com made 401whp using the 2.5l block and 2.0 liter heads(that was over 2 yeras ago) I am sure is is at least 450whp now with other additional mods he had done.
check out his website(it is a silver WRX on the home page).

my .2c

13secwrx · 07-13-2005, 07:39 PM

I made 387whp on pump and 465 on 100 octane...so Ive been their ...I just want to know if I can make 450whp on pump w/the 35r and some great tuning...

Scoobs2002 · 07-14-2005, 08:01 AM

Quote:

Originally Posted by 13secwrx

I made 387whp on pump and 465 on 100 octane...so Ive been their ...I just want to know if I can make 450whp on pump w/the 35r and some great tuning...

Yes thats possible.....,but I havnt seen it done with WRX heads....you would need JDM heads or USDM STi heads at the least.

Scoobs

ILwrx · 07-14-2005, 10:03 AM

wow. I didn't thought that heads limit can take away so many hp.
Right now i have stock wrx heads with cams and will be installing jdm v8 heads with 272 juns. What HP gain could I expect? (2.5 block)
Thank you.

kwilson36 · 07-14-2005, 10:13 AM

Whats the difference between the WRX heads and USDM STi heads?.

As far as I know they are both small port. I think the WRX heads are even AVCS provisioned. I always thought that the STi cams had everything to do with it not so much the heads.

My theory is that if you have the engine apart replacing the block with a built lower end why wouldn't you just send your WRX heads out for a nice P&P. I mean hell then you could upgrade to the Jun cams or Crowers.

Just a thought.

jared nelson · 07-14-2005, 10:19 AM

stealth wrx aka nick deblasi from section8 motor werks made 536 wheel horsepower with a 2.5ish liter, stock WRX heads (ithink with some porting, but stock cams for sure) and a bunch of other things, custom Water to Air IC, af garrett t04r turbo at 33 psi boost. It takes a whole LOT to extract power from a motor when the heads are that ****ty. i mean 33 psi boost to make 536 wheelhorsepower. thats not good, thats a sign of a very inefficient motor.

jared nelson · 07-14-2005, 10:21 AM

Quote:

Originally Posted by kwilson36

Whats the difference between the WRX heads and USDM STi heads?.

As far as I know they are both small port. I think the WRX heads are even AVCS provisioned. I always thought that the STi cams had everything to do with it not so much the heads.

My theory is that if you have the engine apart replacing the block with a built lower end why wouldn't you just send your WRX heads out for a nice P&P. I mean hell then you could upgrade to the Jun cams or Crowers.

Just a thought.

upgrading cams is a HUGE undertaking, because that means you have to also do springs, which means you need new retainers, and all this also means you need to replace the shims, and build an underbucket or shimless design. its not just a matter of slapping in new cams like on an EVO. i HIIIIGHHLY recommend ditching the WRX heads and puting some 207 heads on. I think a 257/207 shortblock/head combo would be potent.

pux888 · 07-14-2005, 10:56 AM

+1....heads on our cars is a big PITA. i used to have a set of v 8 heads here and let them go, and ive been kicking myself ever sense. and by the time you put quality parts, port and polish wrx/sti heads your into some BIG money!

kwilson36 · 07-14-2005, 11:17 AM

Quote:

Originally Posted by jared nelson

upgrading cams is a HUGE undertaking, because that means you have to also do springs, which means you need new retainers, and all this also means you need to replace the shims, and build an underbucket or shimless design. its not just a matter of slapping in new cams like on an EVO. i HIIIIGHHLY recommend ditching the WRX heads and puting some 207 heads on. I think a 257/207 shortblock/head combo would be potent.

Are the 207 heads big port?...what are the main advatages as it relates to cams?. Is there any situation that you can bump up to a more aggresive cam and not have to upgrade springs, retainers, shims?. I always assumed that you could use the stock componants or at least be able drop the STi cam in without replacing everything.

I always subscribed to the theory that the heads where the real limiting factor on the USDM 2.0 and 2.5's making reliable big HP. Just not able to move enough air.

Curious?.

wcbjr · 07-14-2005, 11:31 AM

Wrong forum.

jared nelson · 07-14-2005, 12:50 PM

Quote:

Originally Posted by kwilson36

Are the 207 heads big port?...what are the main advatages as it relates to cams?. Is there any situation that you can bump up to a more aggresive cam and not have to upgrade springs, retainers, shims?. I always assumed that you could use the stock componants or at least be able drop the STi cam in without replacing everything.

I always subscribed to the theory that the heads where the real limiting factor on the USDM 2.0 and 2.5's making reliable big HP. Just not able to move enough air.

Curious?.

yes i think they are, i do know that in stock form, BONE STOCK form, they way out flow the WRX heads, and even better than MOST head mechanics will be able to flow them with just PnP jobs. Als, you can spin them up to 8000 rpms, or more, and also use AVCS. the WRX heads NEED the following upgrades to spin to 8000. underbucket shims, new retainers, new springs, and to make use of the engine speed, youll want cams. thats much more than just buying a 207 head and using that.

believe me, i went the hard route 2 years ago, and it blows dick! i have heads that flow well, for having stock cams still, and it cost me 2500 bucks or more. i did titanium retainers and dual valve springs, ported moderately with good flow, stock cams, and stock shims. I spin my motor to about 7700 RPMs because Ron at axxis power racing only recommended it take it to 7600. if i would have just bought the Gdamn 207 heads, i could be spinning my **** to 8500 rpms all day long, outflowing these, getting better spool with the AVCS, and making more power with a MORE efficient head. and it would have cost me less!

turbo2ner · 07-14-2005, 12:55 PM

Crower valve springs and titanium retainers are $300 from Summit. then the cams are not that bad either. How on earth did you spend $2500??

Port job is not $1700.

kwilson36 · 07-14-2005, 01:07 PM

Well that depends now doesn't it.

http://www.crawfordperformance.com/p...rts.cgi?Menu=6

jared nelson · 07-14-2005, 01:28 PM

cuz i got one of these... Axis Racing Stage 2 Valvetrain Kit:
- Dual Spring Valvesprings
- Titanium Retainers
- New Buckets
- New Shims (Shim Under Bucket Design)
- New Keepers
COST: $1,399.99

If Heads are sent to us Included is:
-New Valve Seals, Valve Lapping Procedure
- Free Assembly
- Customer pays Shipping

but kept the overbuckets in because of budget, and one of these...

Street/Race Flow Numbers
- Intake: 260CFM
- Exhaust: 225CFM
- (+/- 5%)
Stock WRX Flow Numbers
- Intake: 201CFM
- Exhaust: 159CFM

Axis Racing Street/Race Porting:
- Multi Angle Valve Job
- Valves are evened to .005 of each other
- Usually a 2 week turn around

TOTAL COST: $ 1,249.99

and note the flow numbers, i dont think they are that better than the stock 207 heads. mine were not done that well either, because mine were done 2 years ago.

jared nelson · 07-14-2005, 01:36 PM

THEN CAMS! its a no brainer, ditch those, and do 207s

kwilson36 · 07-14-2005, 03:24 PM

Wont you have the same expense with the 207 heads?. I mean you still have to upgrade the valvetrain right?. I mean why would you drop WRX cams in a 207. I would want a much stronger profile cam in there to take advantage the extra breathing room.... you know.

jared nelson · 07-14-2005, 03:32 PM

you can buy the heads with cams and the whole valvetrain im thinking.

well lets do this, in order to get your heads to flow the same as the 107, you need cams, and all that **** above, and a pnp. that will cost you about 3k, im thinking,

you can simply buy a whole version 7 sti 207 swap with ECU, turbo, IC, with everything needed, for $4499 at kingpin performance. its the best thing to do with your WRX engine, throw it in the garbage.

jared nelson · 07-14-2005, 03:32 PM

oh, and NO you dont have to upgrade the valvetrain, its allready beefy and flows really well, thats what im saying.

pux888 · 07-14-2005, 03:33 PM

Wont you have the same expense with the 207 heads?. I mean you still have to upgrade the valvetrain right?. I mean why would you drop WRX cams in a 207. I would want a much stronger profile cam in there to take advantage the extra breathing room.... you know.

you wouldnt put wrx cams in 207 heads! they will already go to 8500 rpm stock and come w/ a much better cam profile.

kwilson36 · 07-14-2005, 03:53 PM

Ok .... so the ideal setup would be to buy the 207 heads complete, meaning with valvetrain intact, and lets say an axis stg3 bottom end or a Crawford S3L.

Bullet proof lower with lots of beathing room.

What, if any, Cam is more aggressive that the 207 stockers?.

jared nelson · 07-14-2005, 04:05 PM

im not sure about that, but i know there arent other cams that work with the AVCS, or they arent very accepted yet. yeah, get a badass block, and 207 heads. im not surew if anyone out there ports those much, id assume you can port them and get better flow. remember to get a shortblock that can rev, because you can spin the 207 **** up to 8500 from the factory, and im sure you can do other things to make them spin 9, just not sure what. then a gt35 r would have a ****ing powerband from 4-5k all the way to 9!!! holy ****!

07-13-2005, 04:11 PM	#1
13secwrx Scooby Newbie Member#: 62106 Join Date: May 2004 Vehicle: 2002 Wrx 465Whp SZ'D..when running	Most Hp on stock wrx heads I have stockers right now and I wanna know what the limits of the heads will be ?...I currently have an ej257 w/supporting mods and an sz49. I am prolly looking at a 35r w/the .082 a/r ... Whats the max hp that you have seen on the stock cams and heads... Thanks * Registered users of the site do not see these ads.

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07-13-2005, 05:06 PM	#2
Scoobs2002 Scooby Specialist Member#: 64615 Join Date: Jun 2004 Location: Canada Vehicle: 2002 Impreza WRX GT42R Power!	Ive seen a wrx with 2.5 block and wrx heads (t3/t4 garrett) make 390 whp pump gas 18.5 psi...dont know about race fuel, but im sure with the 35R you can make the 400 mark on pump. Scoobs

07-13-2005, 05:08 PM	#3
Performance Driven Vendor Member#: 75855 Join Date: Nov 2004 Chapter/Region: South East Location: Jacksonville, Fla Vehicle: 04 Dynapack	how about a 2.35 with stock heads plus gt35 that put 395 whp on our DynaPack..

07-13-2005, 07:26 PM	#4
turbo2ner Scooby Specialist Member#: 89385 Join Date: Jun 2005 Location: Loading... Vehicle: many most all WRB/blk/blk/blk/slvr/wht	Little bigger turbo and some nitrous can do wonders.

07-13-2005, 07:28 PM	#5
sonicowrx03 Scooby Newbie Member#: 41566 Join Date: Aug 2003	John woods from www.xmotorsports.com made 401whp using the 2.5l block and 2.0 liter heads(that was over 2 yeras ago) I am sure is is at least 450whp now with other additional mods he had done. check out his website(it is a silver WRX on the home page). my .2c

07-13-2005, 07:39 PM	#6
13secwrx Scooby Newbie Member#: 62106 Join Date: May 2004 Vehicle: 2002 Wrx 465Whp SZ'D..when running	I made 387whp on pump and 465 on 100 octane...so Ive been their ...I just want to know if I can make 450whp on pump w/the 35r and some great tuning...

07-14-2005, 10:03 AM	#8
ILwrx Scooby Newbie Member#: 56597 Join Date: Mar 2004	wow. I didn't thought that heads limit can take away so many hp. Right now i have stock wrx heads with cams and will be installing jdm v8 heads with 272 juns. What HP gain could I expect? (2.5 block) Thank you.

07-14-2005, 10:13 AM	#9
kwilson36 Scooby Newbie Member#: 67449 Join Date: Aug 2004 Chapter/Region: Tri-State Location: Nyack, NY Vehicle: 03 VF22, TXS FMIC EcuTek, Catless...:)	Whats the difference between the WRX heads and USDM STi heads?. As far as I know they are both small port. I think the WRX heads are even AVCS provisioned. I always thought that the STi cams had everything to do with it not so much the heads. My theory is that if you have the engine apart replacing the block with a built lower end why wouldn't you just send your WRX heads out for a nice P&P. I mean hell then you could upgrade to the Jun cams or Crowers. Just a thought.

07-14-2005, 10:19 AM	#10
jared nelson Scooby Specialist Member#: 35075 Join Date: Apr 2003 Chapter/Region: RMIC	stealth wrx aka nick deblasi from section8 motor werks made 536 wheel horsepower with a 2.5ish liter, stock WRX heads (ithink with some porting, but stock cams for sure) and a bunch of other things, custom Water to Air IC, af garrett t04r turbo at 33 psi boost. It takes a whole LOT to extract power from a motor when the heads are that ****ty. i mean 33 psi boost to make 536 wheelhorsepower. thats not good, thats a sign of a very inefficient motor.

07-14-2005, 10:56 AM	#12
pux888 Scooby Specialist Member#: 8356 Join Date: Jul 2001 Chapter/Region: MAIC Vehicle: 02 STi swap 12 WRX limited	+1....heads on our cars is a big PITA. i used to have a set of v 8 heads here and let them go, and ive been kicking myself ever sense. and by the time you put quality parts, port and polish wrx/sti heads your into some BIG money!

07-14-2005, 11:31 AM	#14
wcbjr Scooby Guru Member#: 4001 Join Date: Feb 2001 Location: I love spherical bearings! Vehicle: 2006 Legacy GT Obsidian black	Wrong forum.

07-14-2005, 12:55 PM	#16
turbo2ner Scooby Specialist Member#: 89385 Join Date: Jun 2005 Location: Loading... Vehicle: many most all WRB/blk/blk/blk/slvr/wht	Crower valve springs and titanium retainers are $300 from Summit. then the cams are not that bad either. How on earth did you spend $2500?? Port job is not $1700.

07-14-2005, 01:07 PM	#17
kwilson36 Scooby Newbie Member#: 67449 Join Date: Aug 2004 Chapter/Region: Tri-State Location: Nyack, NY Vehicle: 03 VF22, TXS FMIC EcuTek, Catless...:)	Well that depends now doesn't it. http://www.crawfordperformance.com/p...rts.cgi?Menu=6

07-14-2005, 01:28 PM	#18
jared nelson Scooby Specialist Member#: 35075 Join Date: Apr 2003 Chapter/Region: RMIC	cuz i got one of these... Axis Racing Stage 2 Valvetrain Kit: - Dual Spring Valvesprings - Titanium Retainers - New Buckets - New Shims (Shim Under Bucket Design) - New Keepers COST: $1,399.99 If Heads are sent to us Included is: -New Valve Seals, Valve Lapping Procedure - Free Assembly - Customer pays Shipping but kept the overbuckets in because of budget, and one of these... Street/Race Flow Numbers - Intake: 260CFM - Exhaust: 225CFM - (+/- 5%) Stock WRX Flow Numbers - Intake: 201CFM - Exhaust: 159CFM Axis Racing Street/Race Porting: - Multi Angle Valve Job - Valves are evened to .005 of each other - Usually a 2 week turn around TOTAL COST: $ 1,249.99 and note the flow numbers, i dont think they are that better than the stock 207 heads. mine were not done that well either, because mine were done 2 years ago.

07-14-2005, 01:36 PM	#19
jared nelson Scooby Specialist Member#: 35075 Join Date: Apr 2003 Chapter/Region: RMIC	THEN CAMS! its a no brainer, ditch those, and do 207s

07-14-2005, 03:24 PM	#20
kwilson36 Scooby Newbie Member#: 67449 Join Date: Aug 2004 Chapter/Region: Tri-State Location: Nyack, NY Vehicle: 03 VF22, TXS FMIC EcuTek, Catless...:)	Wont you have the same expense with the 207 heads?. I mean you still have to upgrade the valvetrain right?. I mean why would you drop WRX cams in a 207. I would want a much stronger profile cam in there to take advantage the extra breathing room.... you know.

07-14-2005, 03:32 PM	#21
jared nelson Scooby Specialist Member#: 35075 Join Date: Apr 2003 Chapter/Region: RMIC	you can buy the heads with cams and the whole valvetrain im thinking. well lets do this, in order to get your heads to flow the same as the 107, you need cams, and all that **** above, and a pnp. that will cost you about 3k, im thinking, you can simply buy a whole version 7 sti 207 swap with ECU, turbo, IC, with everything needed, for $4499 at kingpin performance. its the best thing to do with your WRX engine, throw it in the garbage.

07-14-2005, 03:33 PM	#23
pux888 Scooby Specialist Member#: 8356 Join Date: Jul 2001 Chapter/Region: MAIC Vehicle: 02 STi swap 12 WRX limited	Wont you have the same expense with the 207 heads?. I mean you still have to upgrade the valvetrain right?. I mean why would you drop WRX cams in a 207. I would want a much stronger profile cam in there to take advantage the extra breathing room.... you know. you wouldnt put wrx cams in 207 heads! they will already go to 8500 rpm stock and come w/ a much better cam profile.

07-14-2005, 03:53 PM	#24
kwilson36 Scooby Newbie Member#: 67449 Join Date: Aug 2004 Chapter/Region: Tri-State Location: Nyack, NY Vehicle: 03 VF22, TXS FMIC EcuTek, Catless...:)	Ok .... so the ideal setup would be to buy the 207 heads complete, meaning with valvetrain intact, and lets say an axis stg3 bottom end or a Crawford S3L. Bullet proof lower with lots of beathing room. What, if any, Cam is more aggressive that the 207 stockers?.

07-14-2005, 04:05 PM	#25
jared nelson Scooby Specialist Member#: 35075 Join Date: Apr 2003 Chapter/Region: RMIC	im not sure about that, but i know there arent other cams that work with the AVCS, or they arent very accepted yet. yeah, get a badass block, and 207 heads. im not surew if anyone out there ports those much, id assume you can port them and get better flow. remember to get a shortblock that can rev, because you can spin the 207 ** up to 8500 from the factory, and im sure you can do other things to make them spin 9, just not sure what. then a gt35 r would have a ing powerband from 4-5k all the way to 9!!! holy **!