this is kind of a stupid question, but i've been wondering about it. where is the fifth valve on a raptor? i figure 2 intake and 2 exhaust...where is the 5th valve at? thanks

 

I havent actually seen or read it but I would say Intake since thats where people usually try to get the most flow. Never noticed an intake valve is bigger than an exhaust one?

 

JakalWarrior-
i dont know that much about engines. but, in shop class we took apart some lawnmower engines and the intake valve was bigger than the exhaust valve. i dont know if all engines are like that though.

 

[img]i/expressions/face-icon-small-wink.gif[/img]---THE INTAKE SIDE OF ANY FOUR-STROKE IS GOING TO HAVE THE LARGEST AREA FOR FUEL TO GET IN--IT IS STILL UNBURNT AND REQUIRES MORE AREA TO GET IN ---ONCE THE COMBUSTION STROKE OCCURS IT'S VOLUME OR MASS AREA IS DECREASED ---REQUIRING LESS AREA OF FOR IT TO GET OUT OF THE CYLINDER---THUS LARGER INTAKE VALVES OR MORE OF THEM---IN ANSWER TO SOMEONE'S QUESTION ---THE FIFTH VALVE IS THEN AN INTAKE VALVE----HOPE THIS HELPS---HAVE A GOOD ONE ---KEEP IT ON 4 WHEELS