Lotus Elan

Best oil catch can?

PostPost by: HCA » Wed Feb 05, 2020 9:59 am

Who uses an oil catch can and with what results?

With other engines I have used Mishimoto cans with baffles - small and expensive, but seem to do the trick quite well. I expermented venting one into the exhaust of an MGB I had but did not keep the car long enough to qualify any opinion.

I’d be interested in any comments from users if there are other good cans and/or methods.

Thanks
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PostPost by: rgh0 » Wed Feb 05, 2020 10:03 am

TTR makes a very lightweight fibreglass catch tank that is shape to fit in the triangular space in the body moulding in front of the Left Hand footwell. Dont know if it works with a LH drive car ?

cheers
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PostPost by: HCA » Wed Feb 05, 2020 1:24 pm

Thanks Rohan - I googled for a link to the tank and found an old photo of yours.

Does the TTR separate oil from the mist well, or does it pass it straight though??

I am planning for pancakes on the throttle bodies and would rather not vent there and of course will not be able to vent ahead of the butterflies, so I am left with venting to atm. or into exhaust.

I note your comment about the sump building pressure. The Cortina GT used to do the same! My next question was to be vent points - I was wondering cam cover and crankcase..?

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PostPost by: h20hamelan » Wed Feb 05, 2020 6:21 pm

Many people do the right thing, as I see it
And plumb their gases into the exhaust, after the catalytic converter. At least they burn a bit, as opposed to stinking. Further, all the stink is in the exhaust, not being drawn back into cabin of vehicular unit.
Also, with this set up. No need to empty can.
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PostPost by: mbell » Wed Feb 05, 2020 8:18 pm

HCA wrote:I am planning for pancakes on the throttle bodies and would rather not vent there and of course will not be able to vent ahead of the butterflies, so I am left with venting to atm. or into exhaust.


Most people recommend keeping the standard air box. Two main reasons:
1) They do a better job of keeping an fuel vapours away from sources of ignition (i.e. pancakes are seen as increased fire risk)
2) You pulling "cold" air from the nose, rather than "hot" engine bay air.
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PostPost by: disquek » Wed Feb 05, 2020 9:09 pm

Best? That's the one that's free (made from scrap, spare time, and a pint or two)!

I made this one using an advanced CAD system ... Cardboard Aided Design. :lol:

I think I goes in the same place that the TTR one does.

-Kyle

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PostPost by: 661 » Wed Feb 05, 2020 10:23 pm

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PostPost by: 1owner69Elan » Wed Feb 05, 2020 10:49 pm

When I got my modified twincam back from the builder there was no facility for capturing the head breather oil/mist. Just a down pipe like the early Elans. As a result I very quickly had loose oil running on the underside of the body - a mess.

Now installed a Mocal catch tank tucked away on the side, up front. No mess now. Also, environmentally responsible.

https://www.merlinmotorsport.co.uk/p/mo ... nium-m-ct3

I like the feature, also on some others, that visibly shows the level inside the tank.
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