Those hard to find TVR rocker covers
Discussion
Hi all,
I've had a project on the go for a whole now and I fitted one side today, so now I know it fits although I've not started it yet and run it up as the paint needs to cure..
I'll go back to the start and run through with the progress shots.
This is the mould made from parts of a rover cover wood and car bog.... Lots of car bog!
You can't cast from an original cover as I shrinks so the mould has to be an even percentage bigger all round so it shrinks to the correct size.
This was the first attempt to cast but because of the thin wall thickness (you can see a hole in the inside wall where the indentation is)the foundry said it needed to be hotter and use nitrogen to get rid of the oxygen.
So the next time round was ok and the process documented.
More to follow.
Adam
I've had a project on the go for a whole now and I fitted one side today, so now I know it fits although I've not started it yet and run it up as the paint needs to cure..
I'll go back to the start and run through with the progress shots.
This is the mould made from parts of a rover cover wood and car bog.... Lots of car bog!
You can't cast from an original cover as I shrinks so the mould has to be an even percentage bigger all round so it shrinks to the correct size.
This was the first attempt to cast but because of the thin wall thickness (you can see a hole in the inside wall where the indentation is)the foundry said it needed to be hotter and use nitrogen to get rid of the oxygen.
So the next time round was ok and the process documented.
More to follow.
Adam
Edited by Oz2 on Sunday 13th July 07:17
As you can see from the thread cut quality of the casting is good, no air in the cast.
And they use a much smoother sand on the outside so cleanup is minimal
More to come
I've also made some 10mm rocker cover spacers for those fitting roller rockers, we have a set fitted on a griff here and are performing well, no leaks:-)
I'll post a photo later, I have the PDF with the laser cutters for these....
Ready for the engine enamel, I used por15 engine paint.
And finished,
Getting the filler neck off the old cover was a mission as it had been epoxy'd on but sanded and polished it finishes them off nicely...
Just got to fit the other one now. Adam Q any tips for easy removal of the throttle linkage and can the supercharger stay put?
Cheers
Adam
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