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Old 04-12-2007, 04:52 PM   #1
EjtwentyfiveSti
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Member#: 141279
Join Date: Feb 2007
Chapter/Region: Tri-State
Location: River City, NJ
Vehicle:
05 STi
Built/sleeved/cam'd 35r

Default Cosworth Cams EJ25-Material added? (What other Cams are as well?)

I have been unable to find a straight answer. Everyone is saying something different about every cam i comes across for the USDM EJ25 (avcs compatible). I know there is kelford, DPR, Cosworth, Crawford? (ughh), and maybe others. I would love to run cams but nobody seems to have the answer. The only thing I have against material added is the safety.

Can anyone tell me which cams are not material added and which ones are?
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Old 04-12-2007, 10:26 PM   #2
MJU1983
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Location: Saint Louis, MO
Vehicle:
2003 WRX, '06 Armada
05 Vette & 05 STi (sold)

Default

Kelford - Cosworth are one in the same as Cosworth gets their cams from Kelford. They are billet, not regrinds.

Dunno about the others, but JUN are not regrinds either.....they are billet.
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Old 04-12-2007, 10:47 PM   #3
speed_freak27
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2001 RS-T Hybrid
2.5>2.2T>257>2.35S

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If it makes a difference I've run twe cams for nearly 60k very hard miles and they barely show any wear. I know that once is enough but I have heard of regrinds going bad only on a few occasions.
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Old 04-13-2007, 07:12 PM   #4
bboy
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Location: Seattle, WA
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04 Improved STI
Dirty White

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none of those cams have material added (regrinds)

avoid DPR AVCS cams

Crawford doesn't make cams, then again neither does DPR (Crower makes them)
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Old 04-14-2007, 02:13 PM   #5
Hopper
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Regrind cams in OHC engines are not a problem, unlike OHV engines. OHC engines have a consent flow of oil to the cam, unlike the OHV engine, where it relies on splash or oil tossed from the crank. OHV engines use very high spring tension, compared to OHC engines. This high spring tension and lack of oil wipe out cams.

VW air cooled engines have a little better chance,(OHV engine) because of the cam is below the crankshaft.

How many people that have installed regrind cams or new cams in an OHC engine and have one fail?

I’ve lost a cam in OHV engine, but never an OHC.

My experience with a cam going flat happens very fast.

After the cam is burnished in on a OHC engine, and the cam and lifters on a OHV engine, and a constant flow of oil, cam should not go flat.

Cams going flat are not a cause, nor are the regrind cam a cause, these are effects. The cause would be improper break in (high spring pressure or lack of oil)
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Old 04-16-2007, 10:15 PM   #6
TJL Performance
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Location: Indianapolis, IN
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2004 STI
2.6L GT35R in works...

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Can't go much wrong with kelford cams.....
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