Swirl Pot = Surge tank -> Well it's doing the same job I guess. There's a thing called a "Fuel Accumulator" used on the Chrysler Neons with the retunless fuel system that may be the fix for the problem as it was installed to resolve that exact problem on stock cars. I had one in a drawer for years but chucked it when I cleaned out my old office. I'll have to check if there's one fitted on the returnless Focus that a collegue is stripping for a Clubman he's building (I'm doing the engine management on it).
Chicaboo the 3/5kg combo woudl be only to assess the rate for the front only without buying more springs than needed. Although it may mean chucking the rear bar is an option
As it stands the 7/5kg combo on Stinky now feels quite even front/rear in terms of compliance and all that. To me that indicates the ratio between the front and rear rates matches the weight balance of the car reasonably well.
So the theory would roughly expand to:
Code:
Front: Rear:
7 5
6 4.3
5 3.5
4 2.9
3 2.2
This is assuming a linear link between the rates and the weight balance...
A.