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Old 11-18-2011, 06:44 PM
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The 5.4 going in my truck right now has camshafts designed by SHM. They have .525 lift with more duration and a slight difference in LSA. But use the a similar ramp rate compared to a stock cam. I dont see the need to move the power band higher in the rpm range which is what Comp Cams does with there centerline and aggressive ramp rates.

The factory springs suck. They dont supply enough pressure for aggressive ramp rates. I run comp springs setup with my SHM cams. The springs I use are 15% higher spring pressures.

Also being its going in a lifted 4x4 you'll actually be losing closer to 25%-30% of the actual output of the engine.
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Old 11-18-2011, 09:47 PM
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Who sells your cam? I googled SHM cams, but all that pulls up is modular ford's website...

So are you saying that the stock springs can't handle that much lift (pressure), or the springs lose their seat pressure with more aggressive ramp rates?

I forgot the OP had a 4wd, damn cv axles and transfer cases get me every time lol
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Old 11-18-2011, 11:25 PM
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SHM is Sean Hyland Motorsports, i looked on there page but all i saw was cams for 3v and 4v, mines 2v.

Longer duration and more lift just keeps the valves off the seat longer and opens them farther wich allows more air to get in wich does make more hp/tq. But ive also have heard that overlap has alot to do with hp/tq. More overlap=more hp, Less overlap=more tq. And i got a question on the Intake Centerline. Now that is where the center of the intake lobe is in crankshaft degrees??? It confusses me with the Cam lobe center angle. And cant the intake centerline be changed by the adjustable cam and crank gears?? Wich is retared the cam for hp and advance for tq?

And i am going with new springs, im going to rebuild a whole 5.4. Im thinking bout going with DSS rotating assembly bored .020 over(still not sure wich Compression Ratio to go with), Patriot Performance stage 3 heads, what i can find out about the intake manifold is the stock f150 intake is best for tq, ceramic long tube headers w/cats, and all i need left is cams and all the little stuff. What do ya'll think about this setup??
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Old 11-19-2011, 12:06 AM
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Intake Center Line (ICL) is in camshaft degrees IIRC, and you can't change that since its actually....I guess "aspect" is the correct term? Its an aspect of the cam that cannot be changed. Someone correct me if im wrong on this, but i think the gears are for advancing/retardation of the cam, not to change the ICL?

Cam Overlap has to do with both intake and exhaust duration, if you have alot of overlap, both valves open up, which isnt necessarily a bad thing, but if open too long, you lose the power behind the combustion process because the gas and fuel get sucked out too early.

You are correct about the intake, and as far as i know, its pretty much the ONLY intake for that truck, i have not seen any other intakes that provide a reasonable money/hp ratio. From what i've heard and read, it is the most efficient intake for our truck... Unless youve got an aluminum intake, then you could port match and clean that intake up and make it flow a little better.. When it comes to heads man, id be sure to run those heads by whoever you decide to get the cam from, remember, Heads and cam MUST compliment each other for optimum performance and gains!!!!!! Not sure if those heads are milled from the manufacturer, but your CR will be determined by if they are milled (and how much), and the volume of your combustion chamber.... I dont think they are milled unless requested, but you might wanna take those into effect when youre talking to your cam manufacturer... depending on the cam, i think those stage 3 heads might be a little overkill, seeing as how they are rated at 225cfm. But once again, that will be decided by the cam. Other than that, sounds like a good setup so far!
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Old 11-19-2011, 01:00 AM
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Originally Posted by jb451 View Post
Intake Center Line (ICL) is in camshaft degrees IIRC, and you can't change that since its actually....I guess "aspect" is the correct term? Its an aspect of the cam that cannot be changed. Someone correct me if im wrong on this, but i think the gears are for advancing/retardation of the cam, not to change the ICL?

Cam Overlap has to do with both intake and exhaust duration, if you have alot of overlap, both valves open up, which isnt necessarily a bad thing, but if open too long, you lose the power behind the combustion process because the gas and fuel get sucked out too early.

You are correct about the intake, and as far as i know, its pretty much the ONLY intake for that truck, i have not seen any other intakes that provide a reasonable money/hp ratio. From what i've heard and read, it is the most efficient intake for our truck... Unless youve got an aluminum intake, then you could port match and clean that intake up and make it flow a little better.. When it comes to heads man, id be sure to run those heads by whoever you decide to get the cam from, remember, Heads and cam MUST compliment each other for optimum performance and gains!!!!!! Not sure if those heads are milled from the manufacturer, but your CR will be determined by if they are milled (and how much), and the volume of your combustion chamber.... I dont think they are milled unless requested, but you might wanna take those into effect when youre talking to your cam manufacturer... depending on the cam, i think those stage 3 heads might be a little overkill, seeing as how they are rated at 225cfm. But once again, that will be decided by the cam. Other than that, sounds like a good setup so far!

yea after i got to looking at the heads the stage 2 would be better for that small lift cam but if that other tells us wich cam he has on his 2v the stage 3 would be better for it with the higher lift cam,

and more over lap wont suck it out to quick, the reason for over lap is so while the exhuast is going out it will help suck some intake air in to feel the chamber quicker and more overlap will do it quicker at high rpms.
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Old 11-23-2011, 09:15 AM
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Sorry guys. I'm a little late. SHM no longer specs or orders cam any longer for the 2v. I've had these cams since 2006. ICL and LSA are the same number. And they can be change with cam grinds. But they have to complete different functions.
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Old 11-23-2011, 09:20 PM
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Dam I would be living a dream if I knew all the knowledge you guys do and if I had the parts on my 5.4 to back it up... Nice post thou great info
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Old 12-30-2011, 10:05 PM
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I've been looking at the comp cams tri-power cams. They seem like a good choice for a truck with low end torque and decent fuel economy.

The only other option for you on the intake is the HPS hardballer. It claims better torque and hp above 1800 RPM while eliminating all the plastic if you ever wanted to boost it. Too bad its pricey at $700
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Old 12-31-2011, 03:19 PM
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You don't have to change springs, but you wot get the full effect either. I have comp 125# springs and some custom grind JDM Crower cams very similar to theses

http://www.summitracing.com/parts/CRO-62802-2

Also that will be stuffed into these heads, stgIII

http://www.google.com/url?sa=t&sourc...Z9NlqqkrGt_89Q

With s/s valves and +1 mm intake, I'm thinking about working the exhaust port side some more to let it out with alittle more ease, plus the headers need some kind of challenge lol
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