Recent content by Freddurrant

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    Bronze bushed rocker shafts

    Couple of sets built and available.
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    Rockershaft issue.

    I’m 100% pleased with the result. They take a bit of time to construct and are never going to make me much money due to the cost of manufacture. I have indeed sold a couple of sets, the first went all the way to New Zealand.
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    Rockershaft issue.

    It was the quality of the replacement rockers that appalled me as much as the wear in older items. To be honest some of the replacements are as bad as 30 year old ones. it’s quite astounding how much noise the rockers create because of their lateral play and when I first started mine up with the...
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    V8 rocker shaft bronze bushes

    Hi all, These are now available having had 100% good results in my testing. Advert at the link. Bronze bushed rocker shafts
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    Bronze bushed rocker shafts

    Hi all, Having completed a modification on my 3.5L V8 where I bored out and sleeved the rockers with bronze bushes I would like to offer this to the community. The build thread is linked at the bottom. Why bother? 1. Rockers and rocker shafts were always made of materials that do not operate...
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    V8 rocker shaft bronze bushes

    Hi all, Been really lazy posting the results on the forum. My main reaction to these rockers is ‘WOW!!!!!’. I already had adjustable push rods on the engine so redid all the preloads etc and on starting it up I simply cannot believe the difference. The rocker gear is so quiet, all the...
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    V8 rocker shaft bronze bushes

    Heads are back and refitted. Rockers now in place and adjustable pushrods set with the correct preload. I’ve relocated the coil so awaiting a longer lead, then it’ll be for the first start without the splash guards so I can have a good look.
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    V8 rocker shaft bronze bushes

    Just as soon as the heads are back from the machine shop and I can put it all back together. Otherwise the vehicle was a full runner before I whipped the heads off for some valve work.
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    V8 rocker shaft bronze bushes

    Constructed the rockers today after making some acetyl plugs for the ends. The engine is having new valve stems so might be a little delay before fitment and test.
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    V8 rocker shaft bronze bushes

    I have made the tooling to be reused so yes my intention is to offer them once I have proved the concept. My fear is the cost may put people off but I haven’t worked it out yet. I would love to make some more sets for I really have rather enjoyed myself and the tooling is sat there ready to use...
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    V8 rocker shaft bronze bushes

    Pedestals made. This weekend should see construction and fitment with luck.
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    V8 rocker shaft bronze bushes

    Next job is to machine the pedestals. I have decided to go with the option of making pedestals from scratch rather than reaming and sleeving the originals. I think this is a better and more efficient way.
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    V8 rocker shaft bronze bushes

    Forgot the picture
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    V8 rocker shaft bronze bushes

    First test fit revealed that when pressing the bushes in to the rockers they narrowed by about 6 microns so a few minutes on the honing machine brought them back to having 10 microns clearance. Next time with will be compensated for in the machining stage. Now they fit over the shafts beautifully.
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    V8 rocker shaft bronze bushes

    Next was to press them in to the reamed out rockers. There is 10 microns interference which proved to be exactly the amount required. Had to be careful to align the oil hole which is slightly oversize in the bush to allow for a little misalignment.
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