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Roller Rockers? by FastIndyFiero
Started on: 05-12-2003 11:46 PM
Replies: 5
Last post by: T-top Fiero on 05-13-2003 06:14 PM
FastIndyFiero
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Report this Post05-12-2003 11:46 PM Click Here to See the Profile for FastIndyFieroClick Here to visit FastIndyFiero's HomePageSend a Private Message to FastIndyFieroDirect Link to This Post
Well, I have an '84 Iron Duke with the stock valve rockers. What are my options for upgrading to full-roller rockers or roller-tip rockers?
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Report this Post05-13-2003 12:27 AM Click Here to See the Profile for Forbidden DoughnutSend a Private Message to Forbidden DoughnutDirect Link to This Post
As I recall (ie: not 100% on this info), someone made 1.70 ratio full roller rockers for the 2.5, but I believe that the ratio of the stock rockers is greater than that, so for a power gain, it would probably require other mods.

-FD

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FastIndyFiero
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Report this Post05-13-2003 10:51 AM Click Here to See the Profile for FastIndyFieroClick Here to visit FastIndyFiero's HomePageSend a Private Message to FastIndyFieroDirect Link to This Post
What is the ratio of the stock rockers? I actually want to keep the stock ratio, because it has a fairly radical cam, and I'm not quite sure if there would be valve/piston interference if I went with a greater ratio. I've heard BBC rockers mentioned a couple times, but I'm not quite sure about that.

[This message has been edited by FastIndyFiero (edited 05-13-2003).]

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T-top Fiero
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Report this Post05-13-2003 03:07 PM Click Here to See the Profile for T-top FieroSend a Private Message to T-top FieroDirect Link to This Post
The stock rocker arm ratio on the '84s is 1.75:1. If you want to put roller rockers in your '84 you will have to have some machine work done on your cylinder head. It will have to drilled and retapped to accept studs for the rocker arms. You will also need longer pushrods.
I am using Crane Energizer full roller rocker arms on my engine rebuild. See pics.

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FastIndyFiero
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Report this Post05-13-2003 05:06 PM Click Here to See the Profile for FastIndyFieroClick Here to visit FastIndyFiero's HomePageSend a Private Message to FastIndyFieroDirect Link to This Post
T-Top Fiero, are you able to use the stock valve cover, or do you have a SD-4 valve cover? Just curious...
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T-top Fiero
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Report this Post05-13-2003 06:14 PM Click Here to See the Profile for T-top FieroSend a Private Message to T-top FieroDirect Link to This Post
It looks like the stock cover will just fit. The poly-locks are within an 1/8" or so of hitting the top of the cover.
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