Lotus Europa Forums > The Paddock

Maybe, just maybe, Beehive springs for TS head?

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Richard48Y:
I had given up on finding Beehive springs for my cross-flow TS head.
But after finding that Ford 9/32" stem valves may be used I also tool a look at Ford valve springs.
Started out with Kent 1600 but everything there seems to be for FF and unsuitable.
But the 'Net search threw me into newer vehicles and I found the Zetec set.
Pretty close to my 60/180 target if I am reading this right.
I have sent an email asking for more details.
Sets of 16 so if they will work I am willing to share.  ;)

Ford 2.0 Blacktop Zetec Post 98 Kent Cams Conical Beehive Valve Springs VS60
Type = Conical Beehive Valve Springs
Installed Height mm = 38 (Original 39.5mm, spacers are easy)
Installed Pressure N = 249 (?)
Installed Pressure lbs = 56 Minimum Height mm = 24
Maximum Pressure N = 836 (?) Maximum Pressure lbs = 188
Coil Bind mm = 22 OD mm = Conical
ID mm = Conical
Notes = Set of 16. Please Check Springs Spec is correct for your application.

SwiftDB4:
I'm initially skeptical about this considering how much smaller the Zetec springs and retainers are compared to your Renault. With much smaller Zetec OD retainers would the Renault rockers operate OK ? Would the Renault spring seats in the head fit the small diameter Zetec springs? Are you sure about the valve diameter? Zetec valves are pretty small.

Richard48Y:
I have sent off a couple of emails asking for more specs.
I do want to know the inner and outer diameters at each end.
I expect to have to modify the spring seats.

The current trick spring set are from BMC A series engines.
The spring seat area has to be modified but the weight saving are very significant, less than half the Renault spring/mass.
This what I will be doing if I cannot get Beehive to work.

The rocker does not contact the spring retainer, only the end of the valve.
My valves are going to be 9/32" stem. (A hair over 7mm.)
This should also be a bit lighter than the standard 8mm.

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