Update time.
Managed to get the car MOT'd and on the road today.
. Been a long time coming, and i was a bit concerned regarding the emmissions. The Last time they were checked, there was HC issues and it was a job to get it dialled in.
On first start up since fitting the new sport CAT, the car didnt want to run. The Idle was too low, AFRs were all over the place and i couldn't adjust the idle due to the idle screw being to short. This was confusing at first, as nothing was touched on the engine or ECU but it seemed to point to the engine needing more air to run and more fuel to match.
After some fiddling i got it to idle smoothly around stoich (AFR 14.7) and got the car booked in for the test.
Laptop at the ready the sniffer was put in the pipe and to my surprise the boxes were green with slightly raised CO. Fast idle cleared this up and was all good
. So looks like you can get through the later emissions test with Megasquirt and a CAT.
I did some tests and found that the fueling had leaned off at the top end, probably due to the extra exhaust flow. So the map was adjusted and my smile was restored. Forgotten how quick it was!
Also gave me a chance to test the MK4 shifter/shortshift and taller 5th gear. Its still a bit stiff but is loosening up. The taller 5th is alot better. It doesn't feel so highly strung at motorway speeds but the drop from 4th to 5th isnt really noticeable.
Took a pic whilst waiting for the MOT. More to come.