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Old 01-12-2004, 07:29 PM   #8
Neutrino
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here is a pic of a pentroof combustion chamber with a central spark plug...the valves angle at a very steep 48 degrees however



and i would like to agree that the DOHC setup is by far the better one even on high displacement engines....the 6.0 in enzo for example or the 5.7 in the carrera GT

another advantage of DOHC engines that IMO is crucial is the fact that you can adjust the lift and timing of the exaust and intake valves independetly from each other...this raises the tuning posibilities to a new level

the only advantages of pushrod that i can see are:
1. cheaper
2. smaller head
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