CHT temps, individual cylinder differences? Options

[falcor75]

For those of you that are running 4 CHT sensors under the plugs, what differences do you see between the cylinders?

Whats your typical temps for each cylinder with:

A: Engine warmed up sitting at idle for a minute or two.

B: Engine warmed up, cruising at 50-55 mph in fifth gear.

[falcor75]

I've got itbs and FI.

I've measured my airflow on the cylinders at idle and #1 does draws the most air, then #3 and #4 are slightly below and #2 the least. The problem is that I have no way of adjusting the individual cylinders, only have idle air between the banks to adjust on at idle. And once the throttle butterflies is opened the idle air really doesnt matter much.

In the FI system I have the options of adjusting the fuel and timing of individual cylinders but I've left those options unused for now.

[era vulgaris]

I've got itbs and FI.

I've measured my airflow on the cylinders at idle and #1 does draws the most air, then #3 and #4 are slightly below and #2 the least. The problem is that I have no way of adjusting the individual cylinders, only have idle air between the banks to adjust on at idle. And once the throttle butterflies is opened the idle air really doesnt matter much.

In the FI system I have the options of adjusting the fuel and timing of individual cylinders but I've left those options unused for now.

Ah, programming EFI is beyond my experience. But the ITB's should still be connected with a linkage similar to dual carbs, right?
I'm curious if you disconnect the linkage, do the airflow numbers change at all?

Re-connecting the linkage was always the trickiest part of tuning for me. It was easy to tune the individual carbs when they were unlinked, but connecting the linkage and making sure that it didn't ruin the tune was always a really fiddly job. And I always relied on my 4 channel head temp gauge to know when I had it set right.

I don't know what linkage you have, but it's possible that it's pulling the 1,2 side open more than the other side.

[falcor75]

I've got itbs and FI.

I've measured my airflow on the cylinders at idle and #1 does draws the most air, then #3 and #4 are slightly below and #2 the least. The problem is that I have no way of adjusting the individual cylinders, only have idle air between the banks to adjust on at idle. And once the throttle butterflies is opened the idle air really doesnt matter much.

In the FI system I have the options of adjusting the fuel and timing of individual cylinders but I've left those options unused for now.

Ah, programming EFI is beyond my experience. But the ITB's should still be connected with a linkage similar to dual carbs, right?
I'm curious if you disconnect the linkage, do the airflow numbers change at all?

Re-connecting the linkage was always the trickiest part of tuning for me. It was easy to tune the individual carbs when they were unlinked, but connecting the linkage and making sure that it didn't ruin the tune was always a really fiddly job. And I always relied on my 4 channel head temp gauge to know when I had it set right.

I don't know what linkage you have, but it's possible that it's pulling the 1,2 side open more than the other side.

Yeah they're like carbs except for modern fuel injectors that spray underneath the butterflies. I've got Tangerines dual pulley setup with the 1-2 side being the master side where the throttle cable is connected. I'll give it another go to see if I can disconnect the throttle cable and readjust the 1-2 side shaft stop to see if it goes any lower.