Anoraks only - interesting site

[campbell]

Mk1 XR2 with Zetec 2 litre transplant.

http://www.zetecinside.com/xr2/index.htm

Stumbled on the site while researching vernier cam pulleys, enjoyed leafing through it as my original interest in quick cars began with my 1983 XR2 which I christenened "Killer"

This thing puts its 84bhp firmly in the shade, obviously. Guy seems to do sprints and hillclimbs, thought it might appeal to a few of the tinkerers and competitors on this forum.

Campbell

PS - never found out anything useful about Verniers on the site, though!

[campbell]

However when I picked up the next Google hit, Evo's 340R long term test review, I think I struck gold:

As soon as I arrive, Dave Walker is into the 340R's engine bay like a man possessed. Helped by the fact that the original single-piece bodywork now splits into two distinct halves (work done by Lotus during the repair of last year's accident), the section covering the whole engine bay is soon removed by undoing 11 screws. Once the cam-cover is off, the current cam timing can be determined via two digital valve-lift measurement devices and a Top Dead Centre indicator. Dave finds the current cam timing is way too retarded (i.e. the exhaust valve is open while the inlet valve has already started to lift) so fuel is being wasted, as is power in the mid-range. Fitting the vernier pulleys mean the timing can be correctly reset to the precise degree, as measured by the instruments. Dave reckons that fitting the ΂£120 adjustable pulleys is a 'must do' on the fickle K-series if maximum efficiency is to be achieved.

Full article here

Time for some verniers for my standard cams perhaps?

[robin]

Campbell, that engine has silly cams in it to start and so is much more sensitive to cam timing; given that rover designed the engine to have your cams on it I would be surprised if the wee bit of tolerance that leads to the minor variances in cam timing would create quite such a spectacular difference - as they say, you cannae beat the laws of physics.

Cheers
Robin

[campbell]

Right-o!