Stock LS1B or E40 ECU = Use EFI Live to get control of air temp modifiers through custom OS tweaks. Can run speed density no issues.
Stock E38 ECU = Use HP Tuners for the same air temp. Can run speed density no issues.
Stock ECU's are pretty complicated to understand for the beginners, but they're also the easiest to get the car started and running.
Aftermarket ECU's are much easier to understand for the beginners, but they're harder to get the car started and running.
The cost of aftermarket ECU's and support from vendors, community, base map availability is much better than using the stock stuff IMO and the cost difference isn't that horrendous between the 2.
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'71 Holden HQ Monaro - 3850lbs race weight, 400c/i - 11.4 @ 120
'66 Pontiac GTO - 389, 4 speed street cruiser
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