 1.7 Rockers, Whats that all about |
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| statesblue |
 Oct 11 2009, 05:03 PM
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#1
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Newbie  Group: Members Posts: 24 Joined: 4-August 08 From: Chino Valley Az Member No.: 9,386 Region Association: Southwest Region  |
Thought I read on here somewhere about using 1.7 rockers on 1.8 heads or something to that order for better performance. Danmmed if i can find it again.
Is this something for more performance or was I reading wrong????????????????? I am pretty old so.................... |
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| McMark |
Oct 11 2009, 05:10 PM
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#2
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
1.7 rockers are compatible with 911 swivel foot adjusters, which are the improvement.
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| Sleepin |
Oct 11 2009, 05:12 PM
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#3
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Advanced Member Group: Members Posts: 3,647 Joined: 20-November 07 From: Grand Junction, Co. Member No.: 8,357 Region Association: Rocky Mountains |
1.7 Rockers can be used to utilize the elephants feet adjusters (swivel foot) from the 911. The 1.8 and 2.0L rockers have a different adjuster diameter, and cannot be used with the elephants feet.
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| jaxdream |
Oct 12 2009, 09:26 AM
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#4
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Senior Member Group: Members Posts: 974 Joined: 8-July 08 From: North Central Tennessee Member No.: 9,270 Region Association: South East States |
If one does go this route of using the 1.7 rockers and the elephant feet adjusters , do you need to use a custom pushrod as in what is needed on the VW engines ??
This part hasn't been mentioned or explained , which would be helpful. Jaxdream |
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| sean_v8_914 |
Oct 12 2009, 10:10 AM
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#5
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Chingon 601 Group: Members Posts: 4,011 Joined: 1-February 05 From: San Diego Member No.: 3,541 |
it's easy but not simple. the bottom of the 1.7 rocker gets shaved 0.06" to accomodate the extra length atop the elephant foot. this can be done on a grinder by hand. stock pushrods can be used. you need to look up the various threads on this board and 914club.com that discuss valve train geometry. the angle in which it pushes on teh valve stem throughout its travel is important. proper angle ensures valve train longevity. sometimes a shim under the rocker perch may be needed to get it right
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| jaxdream |
Oct 12 2009, 10:32 AM
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#6
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Senior Member Group: Members Posts: 974 Joined: 8-July 08 From: North Central Tennessee Member No.: 9,270 Region Association: South East States |
Thanks , you jogged my memory some ( CRS ) , I did read some about the clearencing of the arm now that you mention it. Stock rods good then . Thanks !!!!!
Jaxdream |
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| orange914 |
Oct 12 2009, 05:36 PM
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#7
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http://5starmediaworks.com/index.html Group: Members Posts: 3,371 Joined: 26-March 05 From: Ceres, California Member No.: 3,818 Region Association: Northern California |
do the valve train geometry also. very good mod (IMG:style_emoticons/default/smile.gif)
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