I only had the three sets to test, if anyone has other springs or info, plase share.
Stock valve springs = 54lbs seat pressure tested
JWT Spring and shim set = 61bs tested
JWT set with stock inner spring = 71lbs tested
Schneider valve springs = 110lbs tested
To me it seems that the single JWT springs are only marginally better than good stock springs unless you use the stock inner spring with the JWT outer. I'll add the open pressures when I have the data sheet, but for now that's all I can remember. The open pressures were about the same spread.
I will be putting this information in the new head work page I have been putting off working on for over a year.
Stock valve springs = 54lbs seat pressure tested
JWT Spring and shim set = 61bs tested
JWT set with stock inner spring = 71lbs tested
Schneider valve springs = 110lbs tested
To me it seems that the single JWT springs are only marginally better than good stock springs unless you use the stock inner spring with the JWT outer. I'll add the open pressures when I have the data sheet, but for now that's all I can remember. The open pressures were about the same spread.
I will be putting this information in the new head work page I have been putting off working on for over a year.
Comment