Generation IV External Engine - Carburetted LS2 Ignition Timing. Corvette Pics.

I finally have my LS2 running in my resto mod Corvette. It has a Speed Demon carb on an Edelbrock manifold with stock exhaust manifolds. I feel that the engine has no life, and it backfires when I accelerate. I have not dealt with timing these engines before, so I am just running the basic curve in the MSD box. I also cannot get a consistent idle. It reminds me of my old engines, where you would turn the distributor to get the ignition advance in the right place, but there is no distributor. I am going to have a look at the other curve chips in the MSD box and maybe experiment a little.

Any advice would be appreciated. Pics of the car at the link below.

http://s1192.photobucket.com/albums/aa335/JordanDesignandConstruction/Trevs%20Corvette%20Sting%20Ray%20June%202012/

http://www.facebook.com/trevor.jordan.5872?ref=tn_tnmn

Most of the MSD chips have too much timing for these motors. Check your advance curve. I was working on my sons old school 85 truck and we had the intial timing and advance set too high. The MSD soft ware will allow you to set your own curves.

Most of the MSD chips have too much timing for these motors. Check your advance curve. I was working on my sons old school 85 truck and we had the intial timing and advance set too high. The MSD soft ware will allow you to set your own curves.

Absolutely correct, lost a road race motor due to this. Get the box tuned before you melt it down.