1986 NA2T project

[soysauce300zx]

Hi everyone, so i did a na2t swap with a t25 turbo on my 1986 300zx. I got everything done and it fired right up but i may have a problem. When i rev the engine as its parked it sounds fine. However as soon as i drive it around the block i hear a ticking/clicking noise that somewhats sounds like a exhaust leak or something from the engine bay. I also thought it could be my timing because of the t25 combined with my 1987 ecu or maby detonation because i haven't got the chance to put high octane in it. If anyone can chime in that would greatly help me out. Thanks!

 

[Northerner]

Ticking is usually the manifold blowing somewhere. Try feeling around the manifold when on a cold start but be quick as it warms up quick!

 

[soysauce300zx]

Okay hmm well i replaced the plenium gasket could it be leaking and causing the ticking? Also this may seam like a total noob question but if my timing is set at 20* and i advanced it 3 degrees would the timing be set to 23* or 17*? I live in Colorado at high altitude so i was wondering if i should advance or retard the timing in consideration of that as well. Thanks for the help guys