Since installing a 3GSk, I got to figuring that since the springs are stronger- it lets the arm go up the fuel plate slower or less travel per rpm than before. To me - that would mean that the sweet spot or deepest curve on the fuel plate would be at a higher rpm..
How would a person modify a stock fuel plate < (curve) to compensate for this?
Or should one go with the #10 plate and slide the plate back and forth to get the desired fuel curve.
The reason I am asking this is I have a 24,000 lb motorhome and like the revs that the 3GSK allows me for climbing the big hills, but lack some fuel in the 1600-2100 rpm range now. Above this range the EGT run 1200°.
Can anyone give me some ideas to work with?
TIA

 

This isn't really answering the question, but I had a banks fuel plate layin around and I put it in our 92 Blue Bird Bus, it's all the way slid forward, it woke it up a bit!

 

You are correct on your analysis of the spring system. The plate profile will now definitely seem to change with the new springs.. I have a #10 and before the GSK, the mid range was hard and fast from 1600 to about 2500. Now the range is up slightly but stretched out to over 3K before you hit the upper end de-fuel on the plate.

For the RPM range you are asking and the turbo you have, keeping the fuel in the mid range is what the #10 plate was designed for. The cut off at higher RPM was to help keep the EGT's from going too high on the top end. A #0 or #100 plate doesn't give you that option, you have to use your foot.

You could personally modify a #10 profile, I think it would work best.

 

Make the bottom ramp on the 10 shallower, so the deep center part goes down further in the plate. That will increase the lower mid range fuel.