vernier pulley and cam
#1
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when i got my s2 it had a vernier on it and i was told a cam fitted, there was no markings on it so that was balliks. i had retarded the timing to 8degrees and it was going very well. last night i fitted a power engineering xs428t cam. the loabs are way bigger than standard.
anyway i notice the pulley had been fully retarded for some reason. i marked the dizzy and put it back on where it came off. so it winds over to start, idles 6-700rpm when warm, slow pick up and pops loudly on gear changes so im safe to say its too far retarded now
do i advance the dizzy to take the revs up etc or do i zero the cam then set my dizzy timing?
my nearest rr centre is sitech and he is 150+miles from me so cant just nip along to get it set up properly
anyway i notice the pulley had been fully retarded for some reason. i marked the dizzy and put it back on where it came off. so it winds over to start, idles 6-700rpm when warm, slow pick up and pops loudly on gear changes so im safe to say its too far retarded now
do i advance the dizzy to take the revs up etc or do i zero the cam then set my dizzy timing?
my nearest rr centre is sitech and he is 150+miles from me so cant just nip along to get it set up properly
#2
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I zeroed the vernier today which made it way advanced and I adjust the dizzy timing to suit. Had to way retard it. Dizzy is way round. Boost still seems slow in coming in and it takes a bit to start.
Good job ive a strong battery!!
If I put the dizzy back on its mark and the retard the vernier till she is about 8 negative. Will that make it better?
Good job ive a strong battery!!
If I put the dizzy back on its mark and the retard the vernier till she is about 8 negative. Will that make it better?
Last edited by Turbo Al; 13-09-2013 at 05:40 AM.
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There should be fitting instructions with your cam how many degrees after top dead center it should have full lift. Follow these instructions for timing and then stay off it unless you can see if it's getting better or worse. These littel adjustments are difficult to feel and it might cause you too fook it up
Timing you can set after setting timing right. Go to where you start to det and then a few degrees back. If you want to get it maxed out take it for a tune, because in the all above nothing is said about AFR. You might be running lean and breaking your engine
Timing you can set after setting timing right. Go to where you start to det and then a few degrees back. If you want to get it maxed out take it for a tune, because in the all above nothing is said about AFR. You might be running lean and breaking your engine
#7
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when i was building my engine i found the best way to do it was via the crank timing disk set at i think at the time dont qoute me on this 109 BTDC at this time no1 inlet should be at full lift i put a dial gauge on no 1 lifter to confirm full lift. adjusted the pully to acheve this if it was out.
its been years since i set my engine up so please check before you do any damage.
its been years since i set my engine up so please check before you do any damage.
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Standard cam profile can be pretty different. Please stick to the measurement its not as hard and will give you best results. Else you still need to do it later before you go for set up. Or if you don't even do it then it will be done by the guys of the RR costing you quite some money
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