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| drew2229au |
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After reading the engine retro fit it states that the rocker arms are longer in the AU compared to a EF. 2:1 and 1:8.
A few questions. 1. Can I fit the AU rockers into the EF XR6? 2. How much extra lift will this create? 3. Is this a straight swap? and 4. Do aftermarket cams take into consideration the different ratios? |
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| tickford_6 |
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Posts: 6449 Joined: 11th Nov 2004 |
drew2229au wrote: After reading the engine retro fit it states that the rocker arms are longer in the AU compared to a EF. 2:1 and 1:8. A few questions. 1. Can I fit the AU rockers into the EF XR6? 2. How much extra lift will this create? 3. Is this a straight swap? and 4. Do aftermarket cams take into consideration the different ratios? it will create less lift |
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| drew2229au |
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Longer arms increase lift, not reduce.
Check this link about Holden V6 http://www.v6supercharged.com.au/rocker.asp |
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| TROYMAN |
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yea thats right.. but holdens go from 1.65:1 to 1.9:1 ..
your asking if you can use 1.8:1 instead of 2.0:1.. which means your going backwards.... in the the case of fitting 2.0:1 rockers on a 1.8:1 cam it will create to much lift and bend the valves,break rocker arms.. |
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| drew2229au |
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My mistake. I thought the AU rocker arms were the longer of the two hence why I asked. My bad.
Just out of interest if, I was to put EF rockers into a AU, would the extra lift bind the springs or the valve kiss the pistons? |
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| TROYMAN |
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yes....
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| fiftyone |
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has been covered a few times before, but some ppl ive spoken to swear that they've seen some sort of hybrid concoction of interchangable parts that works
_________________ ** For Sale ** http://www.fordmods.com/ford-parts-for-sale-f17/assorted-e-series-parts-t124697.html |
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| TROYMAN |
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i have seen au heads with ef cams using ef rockers and ef heads using au cams and au rockers..
but those that i know of that have mixed and matched au cams with ef rockers have ended in disaster... |
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| fiftyone |
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i think there was someone recently who put a combo on and bent the valves. cant remember who or what combo tho
_________________ ** For Sale ** http://www.fordmods.com/ford-parts-for-sale-f17/assorted-e-series-parts-t124697.html |
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| drew2229au |
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Thanks guys.
I'm glad you cleared that up for me and I didn't waste my money swapping rockers to go backwards |
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