JVY wrote:There has also been past discussion on the forum about the timing marks on the crank pulley on P6's being inaccurate. So, unless you know that your timing marks are properly calibrated against actual Top Dead Centre, is it fair to say that the figure you think you have it set to could be a little academic?
JVY wrote:If it helps, I think this was one of the threads I recalled that mention 4-cyl timing marks.
If you wanted to check that your TDC timing mark is correct, there are different ways to do it (E.g. wooden dowel down no.1 spark hole). Also, with modern fuels that have a lower 95RON rating, they are going to tend to resist pinking less than the old 4 & 5 star. Therefore, it makes sense for the timing to be retarted a few degrees less than 8BTDC. I reckon that my timimg marks are good to +/- 0.5 degrees and keep my timing set at 8BTDC. However, I nearly always use Shell V-power (97RON) and add Castrol Valvemaster (LRP and octane booster). I have no idea to what value above 97RON the booster makes the fuel but this setup works fine for me on my 9:1 2200TC.
darth sidious wrote:Thanks for that. Oh blimey! I suppose expecting reasonably accurate timing marks on the pulley was just too much, aye?!
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