What is the safest/simplest cam gear adjustment I can do without worrying hitting the valves?
I want to lower my powerband a little bit (maybe 500 rpm), and by advancing my intake cam, it should accomplish that. And to reduce overlap, I'm suppose to advance my exhaust cam and retard my intake.

So if I want to accomplish both goals above, would doing +1 intake +2 exhaust be safe for a bone stock b18b?
Or maybe +1 intake +3 exhaust?

 

What turbo, what cams, what hp goal ? Whats the whole setup? Its not as simple as your asking

 

Will be GT3251B, 250-300whp, stock cam, log style manifold > 2.5" DP > 3" Cat > 3" Catback.

Is just that in general, is good to reduce overlap for FI application, and increase overlap for NA. That is why I just need some really basic/safe setting that works on any FI application. Not to mention it won't be dyno'ed, and will just be street tune by myself with S300.

And my reasoning for shifting the powerband down is that I want more usable power and for the upper rpm I will have the turbo to cover the rest anyway. This should technically give me a broader powerband if I'm not mistaking.

 

Honestly for that setup just leaving the cams in stock position will do just fine and that turbo will spool well. there isnt much overlap on an ls cam. Id imagine 1-1.5 degrees would be suffeceient if your dead set on adjusting them.

 

I have the cam gears, may as well use it. Anyone have more input on this? I read an article that says we shouldn't advance more than 8-10 cam gears degrees.

 

You shouldnt adjust them anyway without knowing the effect that it will have and the only real way that wouldnt take days or weeks would be on the dyno. I would leave it stock and sell the gears. You wont notice the difference without using a dyno to see it on a graph anyway.