My experiment was to uprate the rear spring poundage from stock 250lbs/inc to 275lbs/inch and see if it stopped floorpan scraping without any negative side effects.
However, I didn't double check the size and trusted the Protech website spec. I failed to take a note of the size when originally building or prior to ordering - so sods law meant I managed to buy short rear springs.
I have now confirmed the correct rear spring spec on a Ford Zero is 8"x250lbs. 1.9" ID.
The 7" tall springs are just long enough to give me 125mm sill clearance - could do with another 5mm (I run 130mm rear, 120mm front). The risk is I'm compressing the flex out of the springs just for ride height and losing travel/risk binding the coils when driving.
The 275lbs is definitely staying. Heavy me + boot mounted spare wheel etc needs that little extra, added firmness without being harsh. The 275 vs 250 is extra loading on the suspension mounts - but my crude thinking is if the fronts can take 350 then the rears should survive - only time will tell.
Test run across Romney Marsh on a summer evening was glorious!
Update - 8" x 275lbs ordered and fitted
Anyone in the market for the 7x275s when they come off drop me a line.
Update - 8" x 275lbs ordered and fitted
Anyone in the market for the 7x275s when they come off drop me a line.
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