32 replies to this topic

[Anthony30]

 

Put simply after the initial BET check is carried out and failed you get the following rules for classic minis...
if it had a carburettor from the factory then it gets a non cat test and you CAN remove the cat because it's not needed for the check.
If it came from the factory with fuel injection then it gets a cat test and you CAN NOT remove the cat because it is needed for the check. It doesn't matter if you can pass the test without a cat it still needs one actually fitted to pass.
This counts for UK registered cars.
So the simple rules for cat removal - if your car falls into the emission test that requires a cat test (see above) then you're stuck with keeping it. If not then the cat can go. Unless it's a diesel with a DPF in which case you have to keep it no matter what but there's not many factory diesel classic minis with DPFs fitted

OK so it will pass without the cat as long as it has a good co and ppm. That's all sorted then. Will let her know :).
Could put a modern diesel in a mini. Would be hard to find one that would fit nicely. Great mpg lol

 

PPM is for diesels. It depends on what the limit is for your car. If it's 3.5%, your laughing.  easy to pass.

[surfblue63]

How to adjust an HiF carb

 

 

If you go to a nice friendly MoT tester who doesn't mind you hanging around the workshop whilst they do the test, you might be able to do a bit of adjust whilst they have their probe up your pipe. If you do adjust your mixture remember how many turns you tweeked it so you can adjust it the other way as soon as you get home.

 

My '93 Sprite (carb and no CAT) is adjusted each year to pass the test and then returned to the original settings once at home. 

[CityEPete]

I am watching this thread as I have a 1995 1275 on a HIF38 and I have asked this same question with mixed replies.