351-M cam suggestions
Thread Starter
|
New User
Joined: Dec 2003
Posts: 3
Likes: 0
From: Yakima, Washington
351-M cam suggestions
I have a 351-m in my '78 F-250. Its been bored .030 over, has a 600 cfm Edelbrock carb and Edelbrock intake, and headman headers. Other then that the engine is stock. Could someone suggest a good cam to put in it to gain some h.p. and pulling power. It doesn't pull hills worth a damn if you got a load in the back. Also, is it a good idea when getting a cam to get the lifters and springs to go with it? or will the stock ones work. Thanks
Posting Guru
Joined: Jan 2005
Posts: 1,299
Likes: 2
From: The Vieux Ford, Kansas
I have a Crane .524 lift and 272 duration cam in my 79 F250 with a 400 (same motor just different crank and rods) and I would have gone a little smaller previous owner installed it, mabey not on the lift but on the duration, doesn't start making power until about 2K rpms. The truck runs good but I know I wouldn't want any thing bigger for sure if I was pulling trailers on a regular basis I really need my granny gear to get things rolling up hill when loaded. Do you have an after market timing chain set? The original replacement sets have the cam timing retarded for emissions reasons so you want to be sure to replace that with a double roller set when you change the cam.
-Johnboy
-Johnboy
Laughing Gas
Joined: Nov 2003
Posts: 898
Likes: 1
From: southeren Oh
The crane 523901 cam or 523902 can and lifter kit is a good choice for a engine like that. It is the H-260-2 grind (260/272 duration .493/.502 lift 112Lobe) seperation. It will have a smooth type idle and start making better torque than sthe stock cam starting at 1500 rpm. I have this same profile in my 80 bronc's
300 six. It is a very good profile, not too big at all.
300 six. It is a very good profile, not too big at all.
Posting Guru
Joined: Jul 2007
Posts: 1,355
Likes: 1
hmmm na if its a stock engine your static compression is to low for the hmv 272 crane cam, go with the comp cam extreme energy xe256 but if you ever upgrade to a 400 you will need to change the cam, so maybe to foresee this i would choose the xe262h, this guesstimates help alot in cam choices and the are really not so farr away from real results why an engine on the "fly" :
asuming a scr of 8.6:1 :
xe256h
dcr: 7.2:1
hp: 322@5000
torque: 364@2000
381@3500
xe262h
dcr: 7.05:1
hp: 328@5000
torque: 355@2000
379@4000
asuming a scr of 8.6:1 :
xe256h
dcr: 7.2:1
hp: 322@5000
torque: 364@2000
381@3500
xe262h
dcr: 7.05:1
hp: 328@5000
torque: 355@2000
379@4000
Thread Starter
|
New User
Joined: Dec 2003
Posts: 3
Likes: 0
From: Yakima, Washington
Is it necessary to change the valve springs when using these cams, or just the lifters? Thanks
Trending Topics
Laughing Gas
Joined: Nov 2003
Posts: 898
Likes: 1
From: southeren Oh
Most of all of the cams mententioned on this thread can use a drop-in (stock size) high performance srping.
While the stock springs might work for under 4000rpm , Its cheap insurance to go with the better springs anyway. I wouldn't trust a 25 year old spring.
Sping and retainer kits can be found for around $85 on fleabay.
While the stock springs might work for under 4000rpm , Its cheap insurance to go with the better springs anyway. I wouldn't trust a 25 year old spring.
Sping and retainer kits can be found for around $85 on fleabay.
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
