2001 Lightning Steeda pulley question

[01lightning]

I am going to purchase a Steeda 8.4 pulley for my supercharger with the diablosport tuner they offer. What download do I need if all mods are as follows: Steeda high flow cold air intake kit, 8.40 pulley with new belt. The rest of the engine and power train is stock.

[LightningMike03]

Assuming you are using the U7158 and 93 octane gas is available, you should use that tune.

I would STRONGLY suggest you get a good Wideband A/F gauge and install it before making any modifications to the Lightning.

I've been using the 93 octane tune and I'm currently running a 2.7" upper and 9.0" lower pulley. Getting more than 17LBS boost and the A/F is dead-on 11.5 while under heavy load.

I would also suggest you run a 1-2 step colder spark plug. Either the NGK TR-6 (1 step) or the Denso 22 (2 step).

[mikel]

Good call Mike....thanks