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Camshaft Recommendation? 


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 Post subject: Camshaft Recommendation?
Posted: Thu Sep 20, 2007 2:13 pm 
Tyre Shredder

Age: 55

Posts: 373

Joined: 9th Feb 2006

Ride: AU Wagon

Location: Newcastle
NSW, Australia

I am looking at using 1 of these 3 cams on an AU I6 with a turbo. Initially say 6psi with stock internals, later going to 10psi after rebuild with stronger pistons & rods if/when required.

A. Intake 6deg BTDC / 64deg ABDC, duration 250deg, valve lift 0.444in.
Exhaust 66deg BBDC / 18deg ATDC, duration 264deg, valve lift 0.476in.

B. Intake 14deg BTDC / 68deg ABDC, duration 262deg, valve lift 0.478in.
Exhaust 56deg BBDC / 24deg ATDC, duration 260deg, valve lift 0.456in.

C. Intake 23deg BTDC / 65deg ABDC, duration 268deg, valve lift 0.476in.
Exhaust 63deg BBDC / 17deg ATDC, duration 260deg, valve lift 0.450in.

None of these are really aggressive, looking at the specs cam B seems the best compromise to me due to lift and not opening the intake too early. Cam C only has 2deg more overlap than B if my calcs are right (A:24, B:38, C:40) but C seems to be set up more for scavenging on a NA setup. I only have lobe separation for C, centres are at 113.

Any thoughts on how these would go?



AU1.5 Wagon, Raptor ProStreet kit, Pacemaker 4499's with 3" collector, 3" metal cat, 3" pipe, Pex BSO660 & BSO439, BA brakes, Sprintgas mixer LPG system, Airod variable-venturi mixer... stealth FTW Sniper tuned!

To be updated... soon!

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