[Chrysler300] Knock Knock Need Octane Boost?

[Anthony Rinaldi <awrdoc@xxxxxxxxx>]

Hi to all of you with wedge engines and the high compression/crappy gas conundrum!

I got rid of my dependence on Turbo Boost 108 with MMT sp? racing gas additive. By the case $125 + S/H about $12 a bottle. 

A race mechanic/driver with advice from a racing engine builder/racer did the following to cure those pesky rattles:

1. Change to cold range plugs (NGK)
2. Increase the jet size in primaries (my gas mileage remained the same. (Went from .100 to .107)
3. Set the full timing advance with the vacuum CONNECTED. 
4. Advance the timing as much as you can without hearing the crickets chirp. 

My engine runs cooler, runs better with more power and when I get on the gas, vacuum drops and the engine instantaneously retards up to 8 degrees with no knock then when the vacuum starts to rise returns to the full advance with no knock.  

Just sharing my fortune. Do not try this at home, if you don't want to get rid of the octane boost habit or you like to hear that lovely pinging sound. 

This will also help you folks where 93 is not available. Although there is a point where these techniques are no substitute for boosting lower octane fuel up to at least 93. 

Tony Rinaldi
300-F Convertible
Using 93 octane usually with ethanol. 


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