To fit a cat or not to fit a cat that is the question.........from previous but not recent experience some MoT Inspectors are unsure of the status of Sevens post cat fit requirement.
If the car is home built without further reference they can go straight for the 'smoke only test' irrespective of the youth of the car.
The MoT outcome depends on whether the Inspector likes Cadbury Milk Tray or not !
#12 If the car is home built without further reference they can go straight for the 'smoke only test' irrespective of the youth of the car.
That's not been my experience, Geoff, although I have often needed to point the tester to the Emissions Standards doc (see below). The testers I've used always start with the Basic Emissions Test (BET), and then move on to the specific Cat test should the car fail BET. Maybe I could simplify things with some chocs!
The date after which a cat is required is clearly stated in the MOT Manual:
Kit cars
Kit cars and amateur-built vehicles first used on or after 1 August 1998 must have either Single Vehicle Approval (SVA) or Individual Vehicle Approval (IVA).
You must test kit cars or amateur built vehicles to the limits in the vehicle’s registration document (V5c). If the V5c does not show any limits, you must test it to the limits of the engine fitted at the time of the SVA or IVA test.
Re #13: Yes Lambda 1.03 would definitely be hard to achieve on a Duratec without a cat, John.
My car is cat-less (doesn't need one in Canada for 'Repli-kit' class of cars that mine comes under). I have set the target Lambda at idle and Throttle Site 0.0 to 0.97 to make it a bit smoother, the target Lambda at 2500 below Throttle Site 8.0 is 1.00. My fuel trims are much better (i.e lower) than the standard Caterham map, so the mapping is better optimised to the engine. This is the wideband Lambda readout with the left side of the graph mainly at idle (1000RPM for my car) and the right side just over 2500RPM:
To fit a cat or not to fit a cat that is the question.........from previous but not recent experience some MoT Inspectors are unsure of the status of Sevens post cat fit requirement.
If the car is home built without further reference they can go straight for the 'smoke only test' irrespective of the youth of the car.
The MoT outcome depends on whether the Inspector likes Cadbury Milk Tray or not !
#12 If the car is home built without further reference they can go straight for the 'smoke only test' irrespective of the youth of the car.
That's not been my experience, Geoff, although I have often needed to point the tester to the Emissions Standards doc (see below). The testers I've used always start with the Basic Emissions Test (BET), and then move on to the specific Cat test should the car fail BET. Maybe I could simplify things with some chocs!
The date after which a cat is required is clearly stated in the MOT Manual:
Kit cars
Kit cars and amateur-built vehicles first used on or after 1 August 1998 must have either Single Vehicle Approval (SVA) or Individual Vehicle Approval (IVA).
You must test kit cars or amateur built vehicles to the limits in the vehicle’s registration document (V5c). If the V5c does not show any limits, you must test it to the limits of the engine fitted at the time of the SVA or IVA test.
The engine limits are shown in the In-Service Exhaust Emission Standards for Road Vehicles --19th Edition. Caterhams are listed on pp 23-24. I always take a printout of those pages as I often find I need to challenge the tester's attempts to fail my Duratec for Lambda > 1.03!
JV
Yes, it will be its first MOT with 2 miles on the clock.
Ok, I will sort it out.
Thanks.
I can't remember how many cars and bikes I have owned, not sure if that is a good or a bad thing
Re #13: Yes Lambda 1.03 would definitely be hard to achieve on a Duratec without a cat, John.
My car is cat-less (doesn't need one in Canada for 'Repli-kit' class of cars that mine comes under). I have set the target Lambda at idle and Throttle Site 0.0 to 0.97 to make it a bit smoother, the target Lambda at 2500 below Throttle Site 8.0 is 1.00. My fuel trims are much better (i.e lower) than the standard Caterham map, so the mapping is better optimised to the engine. This is the wideband Lambda readout with the left side of the graph mainly at idle (1000RPM for my car) and the right side just over 2500RPM:
James
#5 by Benton makes it clear. Sad that people are willing to flout the law.
2019 310S 1.6 Sigma
#16 who are you accusing of "flouting the law" then?
Any one who breaks it
2019 310S 1.6 Sigma
Are people breaking it?
#16: Sad that people are willing to flout the law.
#18: Any one who breaks it
Out of interest, have you ever knowingly "broken the law", by which I mean any law? If so, perhaps you'd be willing to enlighten us.
JV
I have broken the law by speeding. I have the (expired) points to prove it.
Stephen
Democratic dissent is not disloyalty, it is a positive civic duty