[RICE RACING]

It is quite easy if given enough information to work out the current thermal efficiency of the OP's engine set up.

I can tell you for a fact from my experience that the token gains from increasing ~22BTDC will be FAR MORE DETRIMENTAL to the health of his engine V's unleashing the power from extra boost pressure and the associated density increase it will offer and thus power level.

I can not overstate the DANGER is screwing around with advance to chase power especially when you are talking 98 oct petrol and the level you are starting at now.

I have worked on lots of engine types from 6.0:1 compression to 10:1 compression and all types of porting and camshaft specifications, from 98 oct petrol to methanol and let me tell you there is little gain and lots of grief in chasing token gains by using garbage advise Re ign timing and water injection crack pot internet theories by people who have only read about it rather than do it over decades.

If you provide me with pertinent details on my email or here? I will run the calculation for you.

I currently as a working teaching aid have a car at ~26% thermal efficiency and on the maximum of the standard fuel system and will fit a pre turbo WM50 system to it and show the results, that engine runs 8.5:1 CR and spark lead much less than what is being discussed here with same Lambda of the pure petrol first up test.

Excessive spark lead is the biggest killer of engines, and a very mis understood topic, and one lots of people get wrong, especially when trying to chase power gains.