Tomei Poncan

[tyra skyline]

i have install tomei poncam 260 in 9.15 & 260 ex 9.15 after i install my car startes to hunt at 1100 rpm to 915 rpm is this normal or i have a problen , what should i do with the power fc to solved this problem if any

[Amaru]

The tuning for idle could possibly be well off (leaning out making the car sound lumpy) and from memory when we had my poncams dialled in at 0/0 the car had a bit of a lump anyway (appeared to be hunting around a few hundred rpm).

[paulr33]

you could try self idle learn procedure? it requires resetting the powerfc tho so youll need to copy your tune and reload it once done

[tyra skyline]

i notice that because it so lumpy i cant get to timed the engine at 20 dec timming from the cas, at the moment i have them dial in at 2adv in and 4 ret ex is this the best setting for these cams , also do i have to add more fuel in the vacuume scale say 300mmhg to 275 mmhg this is where the car would idle

[N I B]

Your way off in your thinking about cam timing.All cams should be dialed in using degree wheel and dial gauge as no 2 engines are the same,If an engine builder cant dial in cams their not an engine builder as its one of the most important aspecs of a good engine.

[Amaru]

With regards to cam gear settings, we found some really wierd settings worked best with my GTR... there was a massive amount of retard on one of them, something like -7 degrees. Get your tuner to play around with them and find where they sit the best.