Thread: 429 Mystery

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Try this; Kurt
http://www.aacncclub.com/

Ford used a lot of engine blocks in different applications, which can be very confusing. The differences sometimes are just stroke length, other times, in combination with head space and stroke length. Paul is the 429/460 expert here. If you wait a while he should check in and be able to guide you. He also has a website where he builds all sorts of big block Ford motors, and has lots of useful info in regards to heads etc.
www.highflowdynamics.com/

As mentioned about high combustion with low octane fuel.....to avoind pre detonation....retard the timing back a bit...low octane fuels have a short explosive burn.....where high octane fuel have a longer burn. If the thiming is supposed to be set at around 10 degrees advance......retarrd it to about 5 or 6 advance.....I would keep the setup you have and just get it tuned right for the choice of fuel.....todays new cars have knock sensors to send the signal to the cpu to adjust the timing for choice of fuel.

As fr the D2VE heads.....everyone says they are the worst....but specs show the are one of the better flowing heads and capable of sustaining up to 1500HP. understandably they are lower compressin heads compared to the D0VE heads but for a 90cc chamber.... all they need is a little cleaning, polishing in the chambers to get rid of the casting burs or sharp edges and then set your timing and fuel mixture to fuel choice and atmospheric pressure, and you wont have any issues of detonation.