Cam questions
Thread Starter
|
Cargo Master
Joined: Jul 2015
Posts: 2,069
Likes: 139
From: tucson
Cam questions
What are the differences between a standard and RV cam? What are some sellers (ebay) referring to when they say "Stage one HP cam"?
What are stage 2? Or is it just hyping things?
Thanks.
john
What are stage 2? Or is it just hyping things?
Thanks.
john
More Turbo
Joined: Nov 2015
Posts: 715
Likes: 112
It's all meaningless.
The "RV" cams add about 12 degrees over the stock cam to the intake duration which broadens the power band but they also add way too much exhaust duration for a 300 six (22 degrees) which increases valve overlap.
This is counter productive to low end torque and fuel mileage.
For street use the 300 six works best with single profile cam profile. (or close to it)
What we find is; cam durations can be increased by 30 degrees over stock without a penalty to low end torque and coupled with bigger valves and port work provide a very wide usable power band.
Any cam in this range that increases torque and widens the power band can be considered an RV cam.
The main limiting factor for 300 performance is the cylinder head and adding bigger valves and port work allows a person to take advantage of larger cams.
"Hot Street Cams" begin with .050" durations around 230 degrees and above.
The "RV" cams add about 12 degrees over the stock cam to the intake duration which broadens the power band but they also add way too much exhaust duration for a 300 six (22 degrees) which increases valve overlap.
This is counter productive to low end torque and fuel mileage.
For street use the 300 six works best with single profile cam profile. (or close to it)
What we find is; cam durations can be increased by 30 degrees over stock without a penalty to low end torque and coupled with bigger valves and port work provide a very wide usable power band.
Any cam in this range that increases torque and widens the power band can be considered an RV cam.
The main limiting factor for 300 performance is the cylinder head and adding bigger valves and port work allows a person to take advantage of larger cams.
"Hot Street Cams" begin with .050" durations around 230 degrees and above.
Thread
Thread Starter
Forum
Replies
Last Post
maxoverdrive69
1987 - 1996 F150 & Larger F-Series Trucks
5
Dec 15, 2012 11:13 AM
fastmover
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
10
Aug 28, 2007 12:15 AM
