Camshafts
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Post Fiend
Joined: Nov 2001
Posts: 14,947
Likes: 6
From: Topsfield, MA
Camshafts
OK..so I'm trying to research engine building and possibly putting a hi performance engine in my truck. I was thinking 351..but now i'm thinking 302 if I can get the power I need. I'm new to all this stuff, I only know basic principles and information. I got some books i'll be reading and I definitely have more research to do. So I've seen some crate engines with choices of the E303 and B303 cam. I was wondering what the difference between them was, and what either cam does for power. I'm trying to get about 350hp, decent gas mileage, and good low end torque for a 5200lb pickup that sometimes goes off road. Power from idle up is what I'm after, engines with peak torque and hp at like 5000 rpm are not for me. Thanks!
Postmaster
Joined: Jul 2003
Posts: 3,934
Likes: 0
From: iowa
E303 cam
Excellent street cam with low and midrange power and good idle.duration@.050 220/220 lift .498/.498
F303 cam
More midrange and top end power than e303 witha rougher idle.
duration@.050 226/226 lift .512/.512
B303 cam
good low end torque, lots of horsepower above 4,000 rpm
duration@.050 224/224 lift .480/.480
X303 cam
too extreme for a truck.
hope this helps.
Excellent street cam with low and midrange power and good idle.duration@.050 220/220 lift .498/.498
F303 cam
More midrange and top end power than e303 witha rougher idle.
duration@.050 226/226 lift .512/.512
B303 cam
good low end torque, lots of horsepower above 4,000 rpm
duration@.050 224/224 lift .480/.480
X303 cam
too extreme for a truck.
hope this helps.
Elder User
Joined: Apr 2003
Posts: 627
Likes: 1
I think either cam is more for cars your truck needs something in the order of 204-210 at .050 the cams you listed don't make great torque at very low rpm. Edelbrock uses about 204-214 in the performer series for low rpm vehicles and if you review any adv. from cam firms they all list something in that range or smaller for low end torque. The longer the duration the higher the rpm when peak torque or hp is developed which means different axle ratios or higher stall convertors for streetable use.
Postmaster
Joined: Jun 2001
Posts: 4,496
Likes: 0
I say take the cam out of the shortblock and sell it, and call comp cam and get one of their extreme energy cams. YOu could get away with in some cases, as I am told by the company and people on this board, slight lopey idle and more engine vacuum than stock. If lope is not your thing, then it will improve overall torque with a smaller grind for sure. Good luck
