so how do i get a base map?
 

im buying a lt-8 that may or may not have a map for a rotary... how do i go about getting a base map so i can get my car running to get it to the dyno?

i cant find much info about this...

ok so it was a 88tii... so im in business. the injectors smaller then i plan to run so im guessing that it will just be hella rich when i crank it.

the lt8 has the mixtrim option. If you see that its too rich, just lower the % on the mixtrim, plus it has a crank map

mixtrim function is only meant to be used as a temporary diagnostic/test and see tool.

any time i encounter a situation where larger injectors are being placed into a system that is tuned for smaller injectors i roughly calculate the difference in expected flow rates and apply the difference as a percentage to the existing fuel curve and tune from there. mix trim is a good TOOL for this but should only be used to get an idea as to where the car wants to run with those particular injectors. once you establish an appropriate operating range for the new injectors then you should return the mixtrim value to its original setting and modify the curves to suit.

Ray

if the injectors are the same(primary/secondary) then you can just use the mixtrim function. I see what you are saying. but in his case, since he is installing the system with bigger injectors, he should just use the mixtrim till he tunes it.