What type of programmer/tuner

[IRA51]

60 hp from just a tune on a stock H2 is not possible. with a mild cam and ported heads ,headers,and a tune your probably only going to get 100 hp bump . I have to call BS on a 60 hp tune.

[8500lbs]

This question is for those with the Dual Tune

The 87 and 91 or 93 tune. How does it work. with a programmer you can just change the tune, this is what I do when I cant buy 93 octane. I plug it in and retune in about 5 to 10 min. I do this because I am afraid of Detenation or other problems. How does a dual tune work, does it have programmer to change setting from 93 to 87 or what????

Thanks
B