Difference between a 350 RPM and 360 RPM package

Posted By: mark7171

Difference between a 350 RPM and 360 RPM package - 11/15/09 03:20 AM

Would you feel a difference between well built 350 and 360 Edelbrock RPM packages? Same Intake,cam,heads,carb,compression.

the chevy and mopar cams are the same 234/244, .488/.510" lift. Radical for a street cruiser, but when combined as a package it really cooks. assume the same gearing 3.73, with good 3000rpm stall.

Would the mopar win due to a long rod ? Is one that better than the other?

Posted By: Cab_Burge

Re: Difference between a 350 RPM and 360 RPM package - 11/15/09 03:29 AM

Quote:

Would you feel a difference between well built 350 and 360 Edelbrock RPM packages? Same Intake,cam,heads,carb,compression.

the chevy and mopar cams are the same 234/244, .488/.510" lift. Radical for a street cruiser, but when combined as a package it really cooks. assume the same gearing 3.73, with good 3000rpm stall.
Would the mopar win due to a long rod ? Is one that better than the other?

There is a lot more differences in design in those two motors than the rod length, IE valve angle and so on

Posted By: HotRodDave

Re: Difference between a 350 RPM and 360 RPM package - 11/15/09 03:51 AM

The chevy will have shorter runners and the heads will probably flow a bit less than the mopar because of the valve angles but it is going to be just a couple pounds lighter, and I litteraly mean just a couple pounds. A few more cubes for the mopar could mean another 10-15 lbs tq also. The rockers on a mopar are on a shaft and should be more stable because of that but the PR angle will cost a few HP from lost valve lift. Both motors have there pros and cons but I think more pros to the mopar with the rod length and shaft rockers

If you went with better cams the mopar really would shine if you used a true .904 lifter cam. With some high ratio rockers it can really get the valves open fast and high, even faster than a roller in a short duration aplication. My own personal example is the cam I just got for my motor, and it is not the maximum rate of lift lobe but it has only 230@.050 duration but I will have .582 lift, try that in the chevy