Q420 camshaft question

[2cams70]

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.

[rgh0]

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

[ill_will]

Interesting discussion, thanks for doing the maths!

[h20hamelan]

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

[rideaway]

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