Lotus 7 - S4

[BertBert]

They all have mechanical advance as revs is the key factor in ignition timing.

Then some have vacuum advance to give some more advance at low throttle openings.

I have an xflow and a BDR both without vacuum advance which seems fine.

There's lots of systems out there such as the Pertronix or Aldon setups. 123ignition seems well regarded. The more expensive ones give user control over the advance curve if you have special requirements there!

[Skyedriver]

Just curious, there was a yellow S4 in bits, on ebay a month or so back. Was tempted. Did anyone here buy it?

[mrvman]

For; S4 7. For my, S4 Seven project. Need the cabin heater assembly. Maybe an S3, S2 Seven cabin heater will work? What is the source of the S4 cabin heater? I have read Rover, the Rovers I look at have a round heater. Have; Elan heater and Europa heater assemblies are they similiar? The Europa heater assembly is smaller than the Elan with no fan. What about Triumph Spitfire cabin heater, too large? Perhaps a picture could be posted, No idea of what I am looking for. Thanks for the help in advance. Located in Arizona mrvman

[Tupwood]

The man you need is Chris Mintoff. His email is [e-mail]

[mrvman]

Thank you for the response. Is the S4 Caterham heater same as the Lotus Elan unit? What vehicle did the Lotus S4 heater derive from? Wouldt like to install a heater assembly in my S4 Project. Help would be appreciated. Thanks in advance. In Arizona USA

[Tupwood]

No idea, sorry. The S4 is quite a different car from my S3, but Chris at Redline is knowledgeable about all forms of Caterhams and can source most parts / sundries for most models, including the S4. He has, I believe, the original S4 body moulds too, so can arrange for new parts to be made… send him your query and he'll get back to you. It is a small business, so a little patience goes along way.

[Abbott]

Did anyone on here buy this S4 at Spicers Auction?

https://www.spicersauctioneers.com/catalogue/lot/e...

I know 2 of the previous owners and enjoyed driving it back in the late 70s