Cam follower clearance question

[jpyke]

Hi folks,

I have my Mk1 heads with HT Howard in Slough for some overhaul and upgrade work at present. I have got a set of 10 thou oversize cam buckets for them to fit as I had a problem with a tappety sound on one head that I think was down to putting used cam buckets back into the wrong holes on a previous rebuild.

Before they machine out the holes for the oversized buckets, they want to establish what the correct clearance should be. The current ones measure 2.5 thou.

It's a a long shot, but can anyone help? Failing this I did ponder whether Abinger Hammer Motors may have an idea, what with their involvement with the new cylinder head project.

[Stagdad]

James, you can't just mention the word up grades and then leave us hanging, what you having done?

[jpyke]

Hey Steve, how are you? How's that EFI project going?

The big trigger for head work was really bad waterway corrosion which they've done a complete weld up and repair of. They've also fitted new seats with 3 angles as the old ones were very inconsistent in height, making shimming a nightmare. I've also had phosphor bronze guides and of course the work mentioned above.

It would have probably been easier to swap to use the MK2 heads from my spare engine but mine were original and I wanted to keep them. Interestingly Howards have said they think the chamber shape is better in the MK1 heads. I knew it was different but not necessarily better, so that's a bonus.

and I haven't mentioned the engine upgrades yet

[Stagdad]

Sound like it's coming together nicely James, looks like I'll have to wait for info on upgrades then , funny you should mention efi as I have finally kick started the project this week after a year out to do an extension, just making an exhaust for the test bed, have now got my cooling all sorted and pressure tested ,fuel system is pressure tested. So it's just the wiring to get stuck into. Should be test turning it over this week although it won't be firing only to try the starter circuit.image.jpg