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Old 04-25-2007, 12:22 PM   #1
AXA
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Member#: 35566
Join Date: Apr 2003
Location: Miami Fl.
Vehicle:
2002 STI WRX GT30R
WRC Blue

Default Need Some help choosing Cams...

First let me start with my mods and car Description .....
2002 WRX Hybrid ...
Crawford S2 2.5L block
Legacy EJ20 twin turbo big port head
STI type C V7 STI cams
GT30R Turbo kit
HKS manifold
JDM 6 speed ( JDM Short ratio gears wich I hate to short for me)

I have search please read........

Well I finally broke in my engine and started to tune my car for pump gas and Water injection.... The thing is my tranny is made to rev to 8000 on a STI type C JDM car... Making this very hard because my new setup will not produce any power above 6900 RPM... The car feels very laizi and stop pulling up on those RPM range no mater what boost level I hit (22 PSI)...
I need bigger cams to use on the street and on the 1/4 track.....
Remember this is my daily driver but I will like to rev my car at least 7500-7800 do to the short ratio of the tranny in some 1/4 passes....
Acoding to Crawford performance I can rev my S2 block to 8000 and the JDM legacy head are made to rev to 7800 RPM from SUBARU...

I am in between cams but I really like some input from the forums member to what duration cams they suggest and what lift for my aplication...
So far I like the
Kelford 272 intake and 264 Ext.. with INT.10.00/ EXT. 9.35 lift
Crower Stage 3
Helix I could not get any number but I like the price...
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Old 04-25-2007, 01:03 PM   #2
kharris4
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Member#: 46018
Join Date: Oct 2003
Chapter/Region: MWSOC
Vehicle:
2003 wrx
silver(mostly stock)

Default

are you looking for cams that are avcs compatible? i'm probably wrong but i think only a couple of companies actually make them.
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Old 04-25-2007, 02:14 PM   #3
Drink
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Join Date: Dec 2005
Location: Woodberry, IN
Vehicle:
... ripper's
sister.

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What ever you choose, go with a fresh billet. Regrounds are bad news.
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Old 04-25-2007, 03:19 PM   #4
mick_the_ginge
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Member#: 27646
Join Date: Oct 2002
Chapter/Region: NWIC
Location: Portland, Oregon
Vehicle:
2003 Sleeved 2.5
Oil Dry Sump Goodness

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If you remember I have the 272/264 mixed kelford cams and I do not think they are going to meet the requirements of your high RPM power.

Have a look at the graph in this old thead of mine.
http://forums.nasioc.com/forums/show....php?t=1063644

If you look at the HP curve you can clearly see that it's already gone flat by 6000 rpm. You maybe able to hold this HP up a little but not much. I have V7 large ported heads, ported, larger valves etc, etc.

On the track however you do not feel the car die off in the upper RPM range and before my block died I track shifted at 7800 all the time. These cams also idle pretty well.

I think if you want real upper rpm power you need to go bigger on the cams, maybe 278 intake and 272 exhaust as a guess. The mixed cam set seems to let the car idle a little better IMO.
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Old 04-25-2007, 04:54 PM   #5
kharris4
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2003 wrx
silver(mostly stock)

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i guess a 2.0 legacy head probably doesn't even have avcs does it. sorry...
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Old 04-25-2007, 05:00 PM   #6
babyblue22681
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Join Date: Jan 2004
Chapter/Region: SCIC
Location: west covina ca.
Vehicle:
03 fast wrx-e55
blue/desert silver

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call ramiro @ crower @ 001-619-661-6477 and he can help you select the right cam for your set up. he can get you something in stock or set you up with a custom grind of your choice. el habla español. i've always gotten my stuff from him.
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Old 04-25-2007, 09:56 PM   #7
AXA
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Member#: 35566
Join Date: Apr 2003
Location: Miami Fl.
Vehicle:
2002 STI WRX GT30R
WRC Blue

Default

Quote:
Originally Posted by kharris4 View Post
i guess a 2.0 legacy head probably doesn't even have avcs does it. sorry...
No AVCS sir...

Quote:
Originally Posted by babyblue22681 View Post
call ramiro @ crower @ 001-619-661-6477 and he can help you select the right cam for your set up. he can get you something in stock or set you up with a custom grind of your choice. el habla espaņol. i've always gotten my stuff from him.
Thank you...
Lo llamare manana gracias....

Quote:
Originally Posted by mick_the_ginge View Post
If you remember I have the 272/264 mixed kelford cams and I do not think they are going to meet the requirements of your high RPM power.

Have a look at the graph in this old thead of mine.
http://forums.nasioc.com/forums/show....php?t=1063644

If you look at the HP curve you can clearly see that it's already gone flat by 6000 rpm. You maybe able to hold this HP up a little but not much. I have V7 large ported heads, ported, larger valves etc, etc.

On the track however you do not feel the car die off in the upper RPM range and before my block died I track shifted at 7800 all the time. These cams also idle pretty well.

I think if you want real upper rpm power you need to go bigger on the cams, maybe 278 intake and 272 exhaust as a guess. The mixed cam set seems to let the car idle a little better IMO.
After 6900 RPM the car die off completely, I have no AWD dyno here on the island to check out the curve of the car ...... I am working in the dark, it maybe lower in the RPM range for all I know...

Jose
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Old 04-26-2007, 01:12 AM   #8
babyblue22681
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Member#: 51981
Join Date: Jan 2004
Chapter/Region: SCIC
Location: west covina ca.
Vehicle:
03 fast wrx-e55
blue/desert silver

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i have a grind that is similar to stg 3 and it pulls chingon up to 7500 rpm
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Old 05-01-2007, 02:19 AM   #9
ilivas
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Join Date: Feb 2004
Chapter/Region: South East
Location: Hickory, NC
Vehicle:
2004 wrx
T04R Turbo / 8k rpm 257

Default

Take into account the 272 kelford cams are measured at .010" not .050"
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