Austin 1800

Thanks very much for your comments... I only have a single carbie.... As an experiment I pulled the choke out a little when on the expressway home last night... it made a big difference, the car seems to free up, going up hills was easier too... I have no doubt now that it is running too lean at higher revs.... I should also say that the recent work I did on the car was as follows: New oil, plugs and filters, and I also re-adjusted the rockers as the were quite loose (Except one which was too tight)... all the rattle sound has now gone and it sounds fantastic... I should also say that it has a "Too stages above standard" cam in it what ever that means... that it what the guy said when it was rebuilt back in 2001. Since then it did I would say 20 thousand kms then sat the then shed for 5 years due to a broken part.... then I got it back on the road again last August... since then it has done about 15 thousand kms as I use it to and from work and have also driven up to Sydney a few times (2000kms round trip). Thanks ?

Hi Everyone, I have an Austin 1800 Mk1 automatic, the car is running great in that it idles fine, starts fine and does not stall.. ever.... the issue I have is that under load is just seems to be bogging down a bit, it also struggles a bit going up hills... cruising along at 80kms per hr it is perfect... sitting on 100kms on the expressway it seems to be making a strange sucking sound and bogs down slightly when I put the foot down to overtake etc.... It has new oil, new spark-plugs, a Scorcher electronic ignition (https://performanceignition.com.au/p/scorcher)... new air filter and oil filters... I do also run flashlube (https://www.flashlube.com/en/products/valve-saver-kit.html) even though I do have hardened valve seats... I run the car on 95 octane fuel and sometimes 98... it is a HS6 carb (1.75") If anyone has any thoughts on why it would bog down a bit at higher revs or under load then I would greatly appreciate your assistance... I though maybe vacuum advance was not working correctly? but I think that would make it more lean than anything wouldn't it?? Thanks. Austin guy.