The +4 lowers the power range of the cam, I looked a that set up but it was $200 more than the HQ500 cam and the gains where negligible.

 

Lowers the performance of the cam? That's a bit misleading..

The +4 degree cam gear will allow the cam to work in a stock engine and perform well.. You can get 90HP 100lbs torque (conservatively) with this cam setup, pipes and a good tune.

When you go to big bore, higher compression you pull the cam advance gear and you get good power increase...

 

Going with the hq 500's.seems to be the best choice for me.I am also going with the hq pro-tuner also.

 

Excellent choices.

 

I think he meant that it moves the TQ curve to the left, not that it decreases performance.

Is this with a TC96? I'd like to see a chart with this setup. Woods has three 6-6 charts on his site, the first having a beautiful, flat TQ curve with numbers in the right places for my taste. The problem is that the other two don't look good to me at all, far too peaky with a weak bottom end. I'm thinking this first chart, shown below, may be the 6-6 with the +4° key, although it doesn't say.



Here is one of the others:

 

+ one

 

Sublime ac You should read what I wrote, I said the 4 degree's lowers the power range not the power and as I said 7 lbs of torque for $200 more isn't worth it.
A 4 degree gear or key makes a large cam work in a lower RPM range, this is an old Hot Rodder trick form 30 years ago!!!