Lotus Elan

Omnitech 510 (In) & 480 (ex) cam timing & tappet clearances

PostPost by: SJ Lambert » Thu Jan 15, 2015 12:31 pm

What's the best clearance settings?
Last edited by SJ Lambert on Tue Jan 20, 2015 5:04 am, edited 1 time in total.
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PostPost by: pharriso » Thu Jan 15, 2015 1:06 pm

Have you called OmniTech?

Contact details are here - http://omnitech-engineering.com/contact-us
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PostPost by: rgh0 » Fri Jan 16, 2015 12:23 am

I run 8 thou on inlets and 10 thou on exhausts.

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PostPost by: SJ Lambert » Tue Jan 20, 2015 4:36 am

Do you have a preferred set of cam timing settings Rohan?
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PostPost by: rgh0 » Tue Jan 20, 2015 6:14 am

I have not used the cam combination you are using so I would go by Johns recommendations.

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PostPost by: SJ Lambert » Tue Jan 20, 2015 7:04 am

He's given me a couple so I better gauge them both
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PostPost by: rgh0 » Tue Jan 20, 2015 9:06 am

Yes he typically quotes a maximum power setting and maximum torque setting so you need to accommodate that sort of range if your going to experiment with timing

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PostPost by: SJ Lambert » Sun Mar 08, 2015 9:13 am

rgh0 wrote:I run 8 thou on inlets and 10 thou on exhausts.

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I'm supposed to be going with 6 & 7 (+-1).......................
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PostPost by: rgh0 » Sun Mar 08, 2015 10:26 am

According to Clive, Johns cams have take up ramps to suit a nominal 10 thou clearance. You can use less clearance if you want. The exhaust clearances close up a few thou when hot and the inlets stay the same or maybe increase a little. Johns recommendations are safe, mine are just a little more conservative :D

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PostPost by: SJ Lambert » Mon Mar 09, 2015 6:55 am

P1100645.JPG and


Oh my aching fingers, that was fun, not!
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