From what I have heard the BS3 in very nice. Total cost to keep the stock ls1 PCM tuned is about $1000 with the best software and a wideband. Both major software supliers now offer the autotuning feature. THey do NOT offer boost contolling that controls boost, I should have clarified. For boost above 105 KPA, you can control full timing retard based on boost pressure as well as afr control jsut the same as the main VE table.
Benifits you will get from the aftermarkets are tune on the fly(This option is now available now for the ls1 pcm for an additional $800), and wide band control under WOT like camcojb mentioned.
Its all what you want. I went with the stock pcm for cost and I wasn't happy with the Gen 7 I had on my last motor. I also wanted to be able to run a electronic trans. If you want the ultimate, go BS3.
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Twin Turbo LS1 '71 Chevelle
1000 hp 93 octane street car
6 speed
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