I’ve recently installed an HIF44 carb on my engine and I’m working through the tuning process. I’ve got an innovate wideband to check the mixtures In what order do you normally tune them - spring, needle then oil? I have started with red spring, BDL, LZX1505 damper and 20W oil and it was super lean and boggy I’m now using yellow spring, BCE needle and 20W60 oil and it’s much better but not finished yet I guess I’m concerned that tuning to suit the wrong spring or oil will make it harder to pick the needle
@@ACDodd is there a general point at which to swap from red to yellow spring? Do you need to observe the piston rising under load or can it be done static?
@@ACDodd my compression ratio turned out a bit higher than I’d originally planned for. I get occasional pinging at part throttle and I’ve only been able to stop this by reducing the timing (I have a programmable timing curve). Would it be best to remove the vacuum advance and run more mechanical advance to get better low to mid performance under load? At the moment it’s a bit compromised And yes the best option would be to lower the compression ratio but I’m trying to work out the best way to do that
Hello Mr Dobb I would like your help and advice please pal. I have a hif44 with a fuel leak. Order a rebuild kit and the fuel needle and seat are wrong which came in the kit. The fuel needle has a sprung loaded top the 1 which came with the kit had a dome top, will this work because it not dame which came out Please help Ta
I did not realise you had these sessions, will see if I can join next time!
I’ve recently installed an HIF44 carb on my engine and I’m working through the tuning process. I’ve got an innovate wideband to check the mixtures
In what order do you normally tune them - spring, needle then oil?
I have started with red spring, BDL, LZX1505 damper and 20W oil and it was super lean and boggy
I’m now using yellow spring, BCE needle and 20W60 oil and it’s much better but not finished yet
I guess I’m concerned that tuning to suit the wrong spring or oil will make it harder to pick the needle
Spring needle then damper and oil.
@@ACDodd is there a general point at which to swap from red to yellow spring? Do you need to observe the piston rising under load or can it be done static?
@@timsminigarageall tuning is always best carried out under load.
@@ACDodd my compression ratio turned out a bit higher than I’d originally planned for. I get occasional pinging at part throttle and I’ve only been able to stop this by reducing the timing (I have a programmable timing curve). Would it be best to remove the vacuum advance and run more mechanical advance to get better low to mid performance under load? At the moment it’s a bit compromised
And yes the best option would be to lower the compression ratio but I’m trying to work out the best way to do that
@@timsminigaragecontact me on Facebook messenger for a video call
bummer i missed it, was at the races . so i guess ill just watch and learn.
Sorry Troy!
Who's the guy doing tuning in Taunton?
Watch my fb page in August.
Hello Mr Dobb
I would like your help and advice please pal.
I have a hif44 with a fuel leak. Order a rebuild kit and the fuel needle and seat are wrong which came in the kit. The fuel needle has a sprung loaded top the 1 which came with the kit had a dome top, will this work because it not dame which came out
Please help
Ta
Yes it will work fine, they don’t make the spring loaded version anymore.
@ACDodd
So is the float gap going to be the same 1mm,
@@1973Baggyyes
@@ACDodd🤞