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Old 07-04-2003, 07:56   #1 (permalink)
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Question AU3 XR8s - did they have roller rockers??

AU3 XR8s - did they have roller rockers??

yeh. did they?
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Old 07-04-2003, 17:38   #2 (permalink)
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Re: AU3 XR8s - did they have roller rockers??

Not sure - certainly the 250 kw V8 did.

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Old 07-04-2003, 19:17   #3 (permalink)
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220 kw XR8's did, and I think the 200kw motors did too.
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Old 07-05-2003, 04:18   #4 (permalink)
347 cubic power!
 
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200kW engines have Ford Motorsport roller-rockers, apparently manufactured by Crane. I would therefore expect the 220 and 250 engines to be so equipped.
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Old 07-05-2003, 05:00   #5 (permalink)
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Re: AU3 XR8s - did they have roller rockers??

1:7 rocker ratio ??
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Old 07-05-2003, 05:25   #6 (permalink)
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Ratio is 1.6:1 in the 200kW engine.
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Old 07-05-2003, 06:14   #7 (permalink)
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Re: AU3 XR8s - did they have roller rockers??

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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Old 07-05-2003, 18:29   #8 (permalink)
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Re: AU3 XR8s - did they have roller rockers??

the rollers they used were yella terra st2027 they are 1.72's
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Old 07-05-2003, 19:07   #9 (permalink)
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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.
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Old 07-06-2003, 17:20   #10 (permalink)
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Re: AU3 XR8s - did they have roller rockers??

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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