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Old 18 August 2009, 12:47   #1
flyingflatfour
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Default cam specs (STI v4 RA V-limited)

Hello everyone,

I'm struggling to find information on the cam profiles that came standard on all imprezas.

Although it seems like all pre-01 cars had the same head castings (with better flow characteristics than later models), sti and RA included, some say the V-Limited may have had much better cam profiles, close to WRC specs.

Do you have any information on these as I might have a deal on V4 STI RA V-Limited heads to go along with a 2,5L STI short block to make 420hp ;-) ?
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Old 22 August 2009, 22:04   #2
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I guess nobody knows then ?
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Old 22 August 2009, 22:46   #3
joz8968
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See post #10 of the below thread:-

http://bbs.scoobynet.com/general-tec...ion-3-2-a.html


In it is a link to another thread 'let's play a game', which may be of use...
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STi Version V . . . 384.3 bhp . . . 349.2 lb ft

Last edited by joz8968; 22 August 2009 at 22:49.
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Old 23 August 2009, 16:18   #4
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Thanks for the reply, however the information is very much sparsed, and the only good one I found is that STI v3/4 have 8,5mm lift.

What I was looking for was for each model (STI v1-10, TypeR, Type RA, etc etc) the lift AND duration, to compare and see if there is a pair out there which can flow enough for 420 hp between 5000 and 7500 rpm included, on a 2,5L. Now this is clearly not achievable with standard WRX heads, which don't flow well at higher revs.

And at first sight 8,5mm lift on STI v3/4 is not sufficient either, although the valvetrain seems ready for 8000rpm.
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Old 23 August 2009, 16:18
 
 
 
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2005, cam, cams, duration, lift, ra, spec, specs, standard, sti, subaru, v4, ver, vlimited, wrx


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