Lotus Elan and Lotus Elan Plus 2 Forums

Andy gets the grumpy old uncle award with consolation prize going to Rohan.

Craven gets a point toward membership of the honorary grumpy old uncle life membership award.

I will try to do better next time so I can get into first place.

Interesting discussion, thanks for doing the maths!

Very interesting, and everyone learning and progressing still after 70 years eh!
Thanks

Hello to you all, and to grumpy old uncles too

This is interesting for me as I have for a while been thinking of doing this job with 420 lift cams on my standard sprint. if there are no more complex issues machining etc etc and you get good results I will do it.

For around a grand it seems like a good power improvement

This post will await your result

I'd be happy to give feedback on how the engine works with the QED 420 camshafts, but you'll have to wait a bit!




To come back to the subject of determining TDC, without this inflaming the debate like the doughnuts and CVs, I tried several methods by demonstration (calculations bore me) according to your different opinions.
First of all, I don't know if my pistons have an offset pin (QED/Omega forged std), I didn't want to dismantle the lower engine to check.
But the result is that TDC always ends up in the same place, plus or minus 0.5°. I don't think that the method is decisive to have an accurate TDC, in this case for a street engine.
The engine assembly is complete and will be re-installed in the chassis this weekend. I'm thinking of starting it up to check that everything's OK before reassembling the body.

Regards
Stéphane