Croc

If you want a Texas option, Jeff Sloan at British Auto Specialists in Dallas is an ex-Caterham dealer. He is very familiar with Caterhams and the zetec installation and could probably arrange for a rebuild. British Auto Specialists | (britauto.com)

Congratulations on buying your "new" to you Caterham. You certainly bought a very unique one with a great history of owners.

Thanks - I got a link message say it was for sale but think you are likely right. Will remove in next week's update.

Understandable decision in the circumstances. You still have an invite to bring the Miata to NJMP for a regular run group in September at the USA7s event.

Week Beginning June 19, 2022 USA7s FORUM FOR SALE ADS Cars For Sale - USA7s NEW Lotus 7 S2 Untitled Document (lotusowners.com) Caterham 2003 Caterham Super 7 Wide Body Based On Lotus Seven #2592324 | Hemmings REPEATS Stalker Marketplace - 1962 Lotus Seven | Facebook Replica / Champion 7 Marketplace - Lotus 7 Sports Car | Facebook Donkervoort Marketplace - 1983 Donkervoort S7 | Facebook Westfield Pre-Lit 1983 Lotus Westfield Seven #2485207 | Hemmings Lotus 7 S4 1971 Lotus #2526952 | Hemmings and here 1971 Lotus Seven | eBay and here 1971 Lotus Seven for Sale in LAKE LEELANAU, | RacingJunk Lotus 7 S2 1962 Lotus Super 7 for Sale in CHATSWORTH, CA | RacingJunk Caterham Caterham Inventory — Beachman Racing Caterham (website not updated - email for their latest incoming) INVENTORY (rockymountaincaterham.com) Caterham Lotus Super 7/Caterham Super 7 S3 - cars & trucks - by owner -... (craigslist.org) Caterham Lotus Super 7/Caterham Super 7 S3 - cars & trucks - by owner -... (craigslist.org) Stalker (sold) Race Car 2014 Lotus Super 7 - Brunton Stalker - cars & trucks - by... (craigslist.org) CANADA Replica Lotus Seven | Cars & Trucks | Moncton | Kijiji

Beachman Caterham or Rocky Mountain Caterham should have them.

An S2 is 11 feet long. If this is just the chassis without all the stuff bolted to it then I bet you could put it diagonally on its side and make it fit. Dimensions are on the base of this linked page Lotus Seven Register - Series Two Page (lotus7register.co.uk)

Swap around and read plugs. However, I think you found a likely candidate with your spark plug test.

Originals look fine. The recent switch in also look fine except for 4 which is a little carbon fouled. That would indicate a rich mixture or weak spark not getting optimium combustion. Seems to line up with the issue of not getting consistent or a weak spark. I would not worry about the dielectric grease. Its fine for now.

If it is not on craigslist via the linked ad above then it is sold.

One other thing - when you took your first set of plugs out did the tips show evidence of running rich or leaning out? I am expecting you should see them fairly clean but would like to confirm.

Week Beginning June 12, 2022 USA7s FORUM FOR SALE ADS Cars For Sale - USA7s NEW Stalker Marketplace - 1962 Lotus Seven | Facebook Replica (Champion) Marketplace - Lotus 7 Sports Car | Facebook Caterham Caterham Super 7 HPC 2.0L for sale on BaT Auctions - ending June 14 (Lot #76,070) | Bring a Trailer REPEATS Replica Marketplace - 1966 Lotus 2-Eleven | Facebook Donkervoort Marketplace - 1983 Donkervoort S7 | Facebook Westfield (Pre-Lit) 1983 Lotus Westfield Seven #2485207 | Hemmings Lotus 7 S4 1971 Lotus #2526952 | Hemmings and here 1971 Lotus Seven for Sale in LAKE LEELANAU, | RacingJunk and here 1971 Lotus Seven | eBay Lotus 7 S2 1962 Lotus #2534446 | Hemmings and here 1962 Lotus Super 7 | eBay Lotus 7 S2 1962 Lotus Super 7 for Sale in CHATSWORTH, CA | RacingJunk Locost Project LocostUSA.com • View topic - WTS: Rotary Locost [Incomplete] Caterham Caterham Inventory — Beachman Racing Caterham INVENTORY (rockymountaincaterham.com) Caterham Lotus Super 7/Caterham Super 7 S3 - cars & trucks - by owner -... (craigslist.org) Caterham Lotus Super 7/Caterham Super 7 S3 - cars & trucks - by owner -... (craigslist.org) Stalker (Sold) Race Car 2014 Lotus Super 7 - Brunton Stalker - cars & trucks - by... (craigslist.org) CANADA None

The good news is that you are making progress. The bad news is that you are still feeling your way through the problem. In the air, spark, fuel equation you seem to be zeroing in on spark as the problem - so thats encouraging. I would go back to your original spark plugs. The problem with spark plugs is they are octane sensitive and tune sensitive. You don't know if you are replicating their exact experience. They could be running higher octane than you, for example. As someone who is currently chasing an electrical cause engine miss in tighter higher G corners, I really can sympathize (73 BMW CSL Group 4 for me). You have two options to proceed here: 1) Hit and miss and hit again - test electrical items one by one. If you take this approach then the coil would be my first stop to test first and secondary resistance by individual coil or just wear the expense and replace, keeping the old one as a spare if its shown that the coil is not an issue. 2) Take a logging approach. You can do Easimap - needs the cable and a laptop. But does not record - only does real time - so you need a person in the passenger seat to be monitoring the laptop to see what happens at testing points or fix a camera on the laptop screen and record real time. The other alternative which I have done successfully is use the AIM Solo DL to log data, overlay it on video (via RaceRender app) and then review. I think @sf4018 did the same? If the ECU is the cause of the problem then a logging approach will be best to diagnose.

No one on this forum has done that conversion to my knowledge. Fortunately you are working from a kit so that is in your favor. I would be giving Stalker cars a call to ask them if it is possible. They would have the knowledge in this instance. My recollection of the Stalker IRS is that it is not based on the C4 Corvette but is a custom design.

Welcome to USA7s and your first post. I think you misunderstood the original poster. Original poster is saying if any one needs background information on SB1633 for sale right now then he has it. Original poster is not the seller of the car but does have relevant information if you were to want to buy as he has seen it in person. If you want the actual for sale ad then you need to go to this link and make contact via that website. 1962 Lotus #2534446 | Hemmings No one on USA7s is selling the Lotus 7 S2 in question. You are best contacting the seller via the Hemmings link. Hopefully I have managed to clarify things!

Do you think it is just a sensor issue? Its such a new engine and (I assume) new sensor?

I remember that car - New York State area.

Week Beginning June 5, 2022 USA7s FORUM FOR SALE ADS Cars For Sale - USA7s NEW Caterham Cosworth BDA-Powered Caterham Super Seven for sale on BaT Auctions - ending June 7 (Lot #75,451) | Bring a Trailer Caterham Caterham Seven Superlite R Track Car for sale on BaT Auctions - ending June 9 (Lot #75,641) | Bring a Trailer Westfield Pre-Lit 1983 Lotus Westfield Seven #2485207 | Hemmings Donkervoort Marketplace - 1983 Donkervoort S7 | Facebook REPEATS RM 8 Marketplace - 2000 Lotus Seven | Facebook Locost Project Marketplace - 1966 Lotus 2-Eleven | Facebook and here Lotus Super 7 Replica - cars & trucks - by owner - vehicle... (craigslist.org) Lotus 7 S2 1962 Lotus Super 7 for Sale in CHATSWORTH, CA | RacingJunk Lotus 7 S4 1971 Lotus Seven for Sale in LAKE LEELANAU, | RacingJunk and here 1971 Lotus Seven | eBay and here 1971 Lotus #2526952 | Hemmings Locost Project LocostUSA.com • View topic - WTS: Rotary Locost [Incomplete] Lotus 7 S2 1962 Lotus #2534446 | Hemmings Caterham Caterham Inventory — Beachman Racing Caterham INVENTORY (rockymountaincaterham.com) Caterham Lotus Super 7/Caterham Super 7 S3 - cars & trucks - by owner -... (craigslist.org) Caterham Lotus Super 7/Caterham Super 7 S3 - cars & trucks - by owner -... (craigslist.org) Stalker (Now Sold) Race Car 2014 Lotus Super 7 - Brunton Stalker - cars & trucks - by... (craigslist.org) CANADA None

No not that one - thats the standard master cylinder for a CSR. I cannot see the race master cylinder for de dion cars on the parts website but you can call and and ask for it.

@BlueBDA Jeff - it is sad to see you move on but thats how it goes. Glad you had a great time and I hope we see you around in your next automotive hobby.

Josh's description on what to do with the brakes - i.e. bed them in over 100 miles and rebleed is the right one. If after that you find them not as firrm as you would like then you can upgrade to the race master cylinder which does improve pedal feel considerably. Congratulations on finishing the build! When is your first track day?

Can you please clarify or expand on this? You don't get to redline unless the pump is pumping enough for the engine to run that fast. What you may have is a problem with the flow regulation to allow a wide open throttle. I thought the 420R had a flow sensor but Simon has hit on something important. Yes it should but you would need someone in the passenger seat with the laptop to detect in real time operation unless you can record somehow. Your description is implying it is an all cylinders event. Rev cutout is a very distinctive feel.

It may not be pretty but it does fill a need. Caterham is a one model company in a challenging market where it has limited attraction without a roof and some concession to more modern conveniences. This one fails though. Their best attempt remains the Caterham 21

Random thoughts as I start to think through this: An S3 tank is 8 gallons (36L). Fuel pump is located drivers side. A right hander should not have made any difference as the fuel would have been all on drivers side where the pump is. change in octane is not going to make a difference on a standard Caterham map - they run rich at standard. Higher octane would have cleaned any deposits lurking in the fuel system - unlikely given car age Fuel gauges in a Caterham are notoriously inaccurate but you topped it up with 4.6 gallons which implies 3.4 gallons were left in the tank. That should have been sufficient for no issues as it is usually only below a third of a tank you start to see fuel cut off from fuel sloshing around in the unbaffled tank on track (depends on the corner). However, if it is a long banked corner (e.g. NJMP Lightning) then you want more than half a tank on board. Its not clear in your later testing whether the throttle hesitation was happening on straights or corners? I infer from reading it was on both? If both thats useful to know as it takes corners out of the equation Your later testing was on full(ish) tank of fuel so that would seemingly rule out fuel surge in the tank You could get to redline without hesitation/popping by avoiding WOT - that tells me fuel flow is working and engine is getting sufficient feed from tank and pump. How far off WOT were you when you did this? Just want to confirm - you hear popping while on throttle AND you feel hesitation from the engine in a cutting out sensation? How perceptible is the hesitation? Trying to gauge if it is 1 cyl or all of them. From what I can discern so far, I think the areas to focus on are: - TPS failing or needs a reset - coil failing at WOT - maybe the roller barrels have slipped out of actuation alignment relative to correct throttle position? Unlikely...

@Anaximander Morning Bob!