Sunday, 23 November 2025

Saturday 15th November - Jets & Bearings!

After being let down by Atspeed racing regarding the tuning of my Green Cortina, I spoke to Webcon about the jet sizes in the carburettor. The guy I spoke to had a wealth of knowledge regarding Weber carburettors and after telling him about the issues I was having, he recommended changing my 135 primary jet to a 140 and my secondary jet from a 140 to a 145. 

So, I ordered a 145 jet and this morning set about changing the two main jets. It didn't take long and once done I took the car for a couple of drives around the block. It immediately felt a lot better and a lot faster. Once the engine had cooled down, I removed the spark plugs and they looked the correct colour as well. I do need to take it on a longer test drive, but the initial results are good. 
The price of the jet was £2.76 plus postage and vat, so came out just over £9. That's a lot, lot cheaper that what the idiot at Atspeed would have charged me if he could have been bothered to tune it! 

Once I was happy with the Green Cortina, I decided to replace the leaking half shaft bearing on my Zetec Cortina. This was made more complicated by the fact that I have converted this car to rear disc brakes. So, instead of just removing the drum, I had to remove the brake discs, the brake pads, calliper, the half shaft securing plate and of course the half shaft. 


With all these removed, I then removed the offending leaking seal and replaced it with a new one. Luckily the rain held off until I was able to get the car back together. I also fitted 3mm wheel spacers on the back as I was pretty sure that the grinding noise I had heard the last time I tried to use the car, was the wheel rims scraping on the calliper. 
A quick test drive revealed that the grinding noise had gone and it looked like the 3mm wheel spacers cured the problem. 
I was really pleased with my days work, It's always good when things go according to plan. 😊


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