RV CAM ?
Senior User
Joined: Jan 2001
Posts: 223
Likes: 0
From: Coquitlam, BC Canada
RV CAM ?
I have a 1979 F-250 truck with a bone stock 400M And I was wondering if putting in a RV Cam would make a difference in HP?.
I'm going to be hauling a camper this summer and would like to have the extra power without making the gas milage any worse.
Any idea's on what would work best for me
?
Thanks Joe
I'm going to be hauling a camper this summer and would like to have the extra power without making the gas milage any worse.
Any idea's on what would work best for me
?Thanks Joe
Senior User
Joined: Apr 2000
Posts: 100
Likes: 0
RV CAM ?
search through the archives and find the hot rod article on how to build up the 400M, they got 385 horsepower and 490?? something ftlbs of torque, just using a 2bbl, stock exhaust manifolds, and some flattops and THE RIGHT CAM. RV cams usually suck. Just my $.02 though
Senior User
Joined: Sep 2000
Posts: 435
Likes: 1
From: Central Oregon
RV CAM ?
Matty,
A number of years ago, I installed a Crower "Baja-TorqueMaster" RV-type cam in my FE-powered hi-boy. It truly did make lots of low-end torque, but would totally run out of breath before hitting even 4000 rpm. As it turned out, the machine-shop that installed the cam bearings for me had screwed up one of them, so eventually screeched a bearing. When I re-built the beast, I talked to Crane for their recommendations, and they suggested their HMV 272-2 with Hi-Intensity lifters. As far as I am concerned, they were right on. Now have a little lump at idle, very solid low-end torque, plus it pulls hard to 5500 rpm very willingly, tho I don't get it into that area very frequently. But when you want to pull a hill with a load, sometimes you need to be able to wind him up a bit, and I don't think an RV cam will let you do that.
Just my thoughts. Good Luck.
Steve
A number of years ago, I installed a Crower "Baja-TorqueMaster" RV-type cam in my FE-powered hi-boy. It truly did make lots of low-end torque, but would totally run out of breath before hitting even 4000 rpm. As it turned out, the machine-shop that installed the cam bearings for me had screwed up one of them, so eventually screeched a bearing. When I re-built the beast, I talked to Crane for their recommendations, and they suggested their HMV 272-2 with Hi-Intensity lifters. As far as I am concerned, they were right on. Now have a little lump at idle, very solid low-end torque, plus it pulls hard to 5500 rpm very willingly, tho I don't get it into that area very frequently. But when you want to pull a hill with a load, sometimes you need to be able to wind him up a bit, and I don't think an RV cam will let you do that.
Just my thoughts. Good Luck.
Steve
Cargo Master
Joined: Jul 2000
Posts: 2,281
Likes: 18
From: Northern California
RV CAM ?
RV is a term used to describe a cam that is designed to work at the low-mid range and usually gives great torque in that range. Most RV's are heavy pullers and require great amounts of torque and low-mid range. Some of the RV grinds can actually be smaller than stock. The cam really need to be selected given ALL the mods to the engine, the compression, head flow, exhaust setup, intake, usage...
Lead Driver
Joined: Nov 2000
Posts: 6,636
Likes: 349
From: Albuquerque
RV CAM ?
I ran the HMV-278 in my last engine and it was great. I did spend a lot of time getting to know my Holley carb though. Not easy to get a good idle.
1977 Ford F-100,400m
280,000 miles
Stock on the outside
modified/rebuilt everything
1977 Ford F-100,400m
280,000 miles
Stock on the outside
modified/rebuilt everything
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