Quote:
Originally Posted by tommurphy73
I have read the bible regarding this engine written by the wizard himself and little which has been written in recent years has been able to surpass this.
Best Regards
Tom
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If you still have the book I'd be interested in the inlet flow figures Dave achieved from non-filled ports and filled ports. It's been nearly 20 years since I did flow development on the Pinto and I was never very happy with the results. I can get as much flow out of a 42mm valve in a downdraft CVH head as I could with a 45.7mm one in a Pinto. The abrupt Pinto shortside really hurts what you can achieve with it. Good high lift flow if you cut the shortside right back but then the mid range between 250 thou and 400 thou starts to suffer.
Valve shape is crucial too. The tulip shaped valves everyone and his dog makes are useless. You want as close to penny on a stick as you can get with a Pinto.
Dave