What AFR are you getting from idle through to say 4000rpm now with the new etubes?
Can you log the following data here- under load not in the shed..
AFR at the following;
1000rpm
1500rpm
2000rpm
2500rpm
3000rpm
3500rpm
4000rpm
Log the data and shoot back.
This is more for collaborative learning and analysis though..
Please don't spend any more money on the carbs until you have bought some new chokes- id go with 34 and 4.5 Auxiliaries. I fear you will spend a lot of time and make very little improvements until the chokes are changed- the large chokes will cause issues with any combination (whether it be F2 emulsions or VF emulsions- air speed is air speed and you wont have any under 5000rpm)... The VF tubes will likely be fantastic but I dont personally see much advantage tuning the car to the VFs when you are still running chokes that wont work with either tubes very well.
I am just worried that you will spend a lot of money on new jets to suit the 40mm chokes, only to change the 40s to smaller chokes in a months time as you will never obtain good tractability running oversized chokes. If you buy more jets to suit the 40mm chokes they will not likely be able to be used when you go down in choke size (hence I fear you could be throwing money away).
If you are adamant you want to try to get it right with the 40mm chokes, please buy a soldering iron and jet drills so you can solder up and re-drill for testing purposes.
Edited by LC-GTR-1969, 02 December 2017 - 05:08 PM.