Quote:
Originally Posted by BigT
Thats weird. All my V8 buddies say 1.7 and larger is only necessary for big block stroker motors. Our engines aren't necessarily on the large side.
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Quote:
Originally Posted by SS_Firehawk
The amount of air that is flowing through a motor will dictate how large the primaries need to be.with 370's pushing as much power as it is from six cylinders, its pounderstandable why they went that size. DOHC motors flow more air for its liter size than pushrod motors.
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Here is how it works. Engines are just air pumps in principle. So a 7 liter big block V8 has .875 liters per cylinder, and a 3.7 liter V6 has 0.62 liters per cylinder. The big block revs to about 6K RPM and the V6 to about 7.5K RPM so with one intake stoke every other rotation of the engine this equates to 2625 liters per minute of air flow per cyclinder at redline for a 7 liter V8. The 3.7 liter V6 would have 2325 liters per minute per cylinder of airflow at redline. Essentially the maximum air flow that any one primary on our engine is comparable to the maximum air flow on a big block.