Lynn,

    What would be your educated guess for the ignition advance to avoid detonation
 for  a side housing intake 13B (intercooled to <130 f ) , 9.4 to 1 comp rotors , 87

octane (no alcohol) and turbo boost limited to 10 in/hg (5 psi) ?? ..................

 

Thanks

 

Kelly Troyer
"Dyke Delta"_13B ROTARY Engine
"RWS"_RD1C/EC2/EM2
"Mistral"_Backplate/Oil Manifold

We raced for years on 20 degrees total advance in a NA engine. So any turbo would need less than that when the boost is up. Off idle  where there is no boost you want the highest advance. The Renesis is mapped to show 44 degrees on coast down closed throttle.

Very low cylinder filling and lean idle mixture needs more time to burn.

 

If you join up to the Nopistons list and go to Dyno charts and ECU, you can download maps from dozens of known brands of controllers, and the readers send in their maps and dyno charts. Ask any question you like. Lots of turbo people to talk to.The kids meet at chassis dynos on Saturdays to race their turbo-charged Mazdas.

 

So you can drive a 500 HP Mazda to work through the week and "Race" it on weekends.

 

I do not tune turbo engines, so have no direct data. On real high boost the kids might be down to 10 degrees leading and 3 or 4 degrees trailing. Racing beat likes no split at all for high boost. The split timing starts to look like detonation. Turning off the trailing can hold off real detonation, so some folks shut of the trailing when the Nitrous is flowing.

 

"An Ignition away from the spark plug after the planned ignition event"

 

I would go with Racing Beat on this and run no split.  

 

Lynn E. Hanover