Region: San Francisco
Car #: 34
Year : 1992 Posts: 2279
Status: Offline
posted
I'd like to convert my Rebello that was previously tuned for 100 octane to 91. It currently runs 17 degrees of timing advance.
1) What is the recommended timing for 91 octane? Do I have to somehow take into account that this is a pro motor with presumably maxed out compression?
2) Is it true that the optimal safe timing is also the timing that produces the greatest power? And by greatest power, do we mean highest peak HP, or broadest torque curve?
3) Any other insight about the conversion to 91? I want the engine to run safely.
Qik Nip
Loose Member '09 & '10 Great Lakes Regional Points Champion
Region: Cincinnati Great Lakes
Car #: 60
Year : 1990 Posts: 1487
Status: Offline
posted
Juan: I'll defer to one of the more knowledgeable engine teckies, but it'd certainly be more like 12 degrees vs 17. The only way to get it on the money will be to run the car on a dyno and see what advance you can achieve without pre-ignition (pinging) - and of course where the power peaks. Rick
-------------------- Fortune Cookie Racing SM 60 Directions for use: Race, Rumple, Repair ... Repeat!
Email this page to someone! | Subscribe To Topic
Printer-friendly view of this topic | Subscribe To Topic