VERNIER ADJUSTABLE CAM PULLEY

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rash_1
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Tue Jul 27, 2010 1:25 pm

HI, I JUST WANTED TO KNOW THE ADVANTAGES OF FITTING A VERNIER PULLEY AND IS IT WORTH PURCHASING.

MANY THANKS
daimlerman
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Tue Jul 27, 2010 1:51 pm

Please stop shouting,makes your posts very hard to read for an oldie like me....
Vernier cam pulley is only required if you are moving the cam significantly closer to the crank.
Sometimes when building a non-standard engine,in order to get the pistons to the top of the bore it is nessesary to machine the top face of the block,thus reducing it's hieght and bringing the cam closer to the crank,this alters the valve timing which you can correct with a vernier pulley.
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toby
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Tue Jul 27, 2010 1:54 pm

Yes only usually used with a replacement 'fast' higher lift camshaft. Engine would need retuning, chip or remap afterwards to take full advantage of the modification.
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