Originally Posted by
Karlos G
My tuner left my vernier at 0, and said that it is pointles on a single cam engine!
My ignition timing was set to 8btc with the T2, standard timing is as you say 12btc but that is only for standard boost, as soon as you start increasing the boost the timing has to be retarded slightly.
hi again
vernier left at 0 why is it pointless on a single cam engine ? this bit of kit gets the valve/ignition timing right
i ran at 148.9 at 0 vernier at 9 psi
now 171.1 with a adjustment of vernier by 1 degree at 9psi
after looking at the specs of the piper t2 it says on there to set 16 btc and just checked mine again and thats at 16 btc running at 13psi not 9psi now and vernier is 1.5 degrees off zero 197.6 bhp
but each engine is different just find it funny 0 on vernier with your spec ( sure it aint been adjusted and done a valve and then just been told it aint been touched )lol
just had another look at your post and the peaking 17 and holding 10 psi is a bit of a worry in my books for a start as the t2 is for higher than standard boost anyway and that spike of 17 then drops off to 10 must be nagging to drive no wonder you are switching to a standard cam coz of the lag
but saying that mine done similar so got rid of amal to cure the boost dropping
when you get to the bottom of it i hope you can put up a post of the problem
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