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big cam 318 and power brakes #1513985 10/08/13 12:25 PM 10/08/13 12:25 PM
Joined: Dec 2012 Posts: 33 Poland U UltraTwist OP member
UltraTwist OP member U Joined: Dec 2012 Posts: 33 Poland	What is the biggest camshaft for 318 that will not cause problems with power brakes? I'm looking at 0.050 duration numbers but they don't tell me much.

Re: big cam 318 and power brakes [Re: UltraTwist] #1513986 10/08/13 01:01 PM 10/08/13 01:01 PM
Joined: Feb 2003 Posts: 12,675 Columbia, CT M moper I Live Here
moper I Live Here M Joined: Feb 2003 Posts: 12,675 Columbia, CT	Depends on the rest of the engine package. Usually something under 215� @ .050 is a safe bet and an intake centerline of 112-114. Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.

Re: big cam 318 and power brakes [Re: moper] #1513987 10/08/13 07:35 PM 10/08/13 07:35 PM
Joined: Jan 2003 Posts: 27,421 Balt. Md 3 383man Too Many Posts
383man Too Many Posts 3 Joined: Jan 2003 Posts: 27,421 Balt. Md	Post the #'s and let us see them. You would be suprised as I have a good size flat tappet in my 63 and still use my power brakes. Ron

Re: big cam 318 and power brakes [Re: 383man] #1513988 10/09/13 01:03 AM 10/09/13 01:03 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	I run the MP 268/272 .450/.455 cam in my 340 and have no loss of braking power in my 81 shorty.. In a 318 I wouldnt go bigger than something in the .474 range.. I am truckless..

Re: big cam 318 and power brakes [Re: 383man] #1513989 10/09/13 07:41 AM 10/09/13 07:41 AM
Joined: Dec 2012 Posts: 33 Poland U UltraTwist OP member
UltraTwist OP member U Joined: Dec 2012 Posts: 33 Poland	Comp XR268 Duration (0.050) 218/224 lift 0.535/0.531 centerline 110 or CompXR274, very similiar just longer duration 224/230

Re: big cam 318 and power brakes [Re: UltraTwist] #1513990 10/09/13 09:21 AM 10/09/13 09:21 AM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	I ran this lunati roller cam in a 318 with 360 heads and then in a 318 with #302 heads. worked very good in a 85 truck. stock smooth idle,18-19 mpg/hwy used all stock valve gear and roller lifters with comp 901-16 springs. 258/264 207/213 @.050 .458/.485 lift 108/110 ICL/LSA went to the hughes whiplash roller cam for a 318 and is almost exact same specs but with a much tighter LSA for a choppy idle 208/213 @ .050 102/107 ICL/LSA .480/.487 lift just like it said, idles like a funny car and smooths right out with lots of lowend torque right off idle. light throttle drives like stock/heavy throttle torques right up and pull hard to 5500 rpm. I have 2 whiplash 318 roller cams now and 1 flat tappet whiplash for my 440 truck going in.

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