Depends.
Typically a chip with a few more degree's timing over a street chip. Some call them 97 octane chips. So the timing is higher than a street chip. also fueling on some chips is compensated for the extra enrichment the alcohol provides.
Some cars can handle timing better than others. Weather, altitude, engine state of tune, intercooler, cam, heads, turbo, carbon, temps, etc all play a role in the timing issue.
Some cars can tolerate a race gas chip program. Others cant but 18-20 degree chip.
My recommendation has always been, if your new to alcohol injection. Start with a lower timing chip aka street chip. Then increase timing from there. It is way less frustrating. Chips that lock BLM's are also neat cuase your fueling is locked and you play with alcohol for enrichment. But dont get too ahead..start with simple.. an 18-20 degree chip and run higher boost with it.
HTH
Julio
