jmartion

AU3 XR8s - did they have roller rockers??

yeh. did they?

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Previous ride: EBII V8 Manual Ghia spring roll.
Current ride: 1970 ZC 351 Fairlane Custom.. (estimated 350ftlb @ 2000rpm.. max torque 420ftlb at 4500rpm.. with standard exhaust manifold!)

russellw

Not sure - certainly the 250 kw V8 did.

Cheers
Russ

bossxr8

220 kw XR8's did, and I think the 200kw motors did too.

slipper

200kW engines have Ford Motorsport roller-rockers, apparently manufactured by Crane. I would therefore expect the 220 and 250 engines to be so equipped.

ebxr8240

1:7 rocker ratio ??

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slipper

Ratio is 1.6:1 in the 200kW engine.

philstoj

im pretty sure the au's had 1.7 ratio rollers,200,220,250kw's,they all run the same cams too..

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Jase_ELXR8

the rollers they used were yella terra st2027 they are 1.72's

bossxr8

The 5.6 used a different cam and I think the roller rockers were FMS on all the 200kw+ motors. The heads were machined by Yella Terra though.

Aussie Pete

My gosh. If people weren't confused they are now....

200kW engines ran a bigger cam than the 220s however once the 1.72 ratio rollers on the 220 are factored in with head work it all came good.

Like Jase said, The roller rockers on the 220 and 250kW engines are yella terra 1.72 ratio ST2027.

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