416 stroker cam choice

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If you use a cam that will produce 400 hp it will have a nice sounding idle but it wont ever sound like a HFT on 108 LSA with a bunch of exhaust duration. Instead, it will make lots of power, which in my opinion is the purpose of a good cam. with a 3.58 crank, 400-450 HP is pretty easy with good heads and matching cam. You will want Edelbrock AG EFI, M1 or Super Vic EFI intake although AG seems to be best choice. A stage one TB, Flash. Your price range will not b an issue if you already have headers.
 
400 hp with a 360? 9.4:1 compression, stock throttle body, Hughes/Edelbrock FI AirGap intake manifold Kit, injectors, Comp Cams XR265R-14, 216/224 @ .050, .506"/.506" 114 LSA, mild ported factory Magnum heads, headers, computer tuning.

RPM.............TQ/HP
2800..........364/194
3000..........373/213
3200..........403/245
3400..........407/263
3600..........417/286
3800..........423/306
4000..........431/328
4200..........426/341
4400..........425/356
4600..........424/372
4800..........419/383
5000..........411/391
5200..........399/395
5400..........388/399
5600..........388/413
5800..........373/411
 
thanks IQ52 is that what your motor did ? i think that would be nice in my truck + 100 shot
 
IQ52, was the factory computer employed for that dyno run?
 
pat d said:
lots of good info so it looks like im going to dump the 416, i see the duration is a lot shorter and the center line is numerically bigger what does the centerline do and will the roller cam give me a lumpy idle ? on the 5.9 how much potential do i have with the stock bore and not breaking the bank i know heads,cam, headers, 52mm tb and a tune. 3000-3500.00 will get me close to the 400hp mark?
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Cam centerline is the point halfway between the intake and exhaust centerlines at the point of highest lift on the lobe.

You can see it is very closely related to the lobe separation angle which is the total angle from intake and exhaust lobes at their highest points.

Wider LSA or wider centerline improves idle quality and will also yield less cylinder cranking pressure. It also broadens the powerband.

Roller cam has no effect on lumpiness. The nature of the lifters allow a different cut on the lobes. they open and shut the valve quicker.
 
is there a difference between a fuel injected cam and carb cam
 
pat d said:
is there a difference between a fuel injected cam and carb cam
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Already answered.

magnummopar said:
There is a lot more to it than just bolting a bunch of stuff you have together and expect a good result. Whats the LSA? Whats the duration at .050". Whats lobe lift or is .528" calculated at 1.6? . Factory injection is very picky about LSA and centerline. The injection was designed to work with a hydraulic roller as well. The difference between a FTS cam vs Hyd Roller is huge, lobes look completely different and thus have completely different manners. This can be bad when your fuel table is determined by a MAP sensor.
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magnummopar said:
Roccodart....But it would not be great with injection, even with 112 LSA, factory injection is timed to have roller cam grind, it needs valve opened quickly so you get max shot of fuel in chamber, not gradual opening of flat lobe design.
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magnummopar said:
Its the difference between carb and FI, not 5.9 and LA. That can be dealt with easily, you just have to use right combo or it will be a dud.
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IQ52 said:
400 hp with a 360? 9.4:1 compression, stock throttle body, Hughes/Edelbrock FI AirGap intake manifold Kit, injectors, Comp Cams XR265R-14, 216/224 @ .050, .506"/.506" 114 LSA, mild ported factory Magnum heads, headers, computer tuning.

RPM.............TQ/HP
2800..........364/194
3000..........373/213
3200..........403/245
3400..........407/263
3600..........417/286
3800..........423/306
4000..........431/328
4200..........426/341
4400..........425/356
4600..........424/372
4800..........419/383
5000..........411/391
5200..........399/395
5400..........388/399
5600..........388/413
5800..........373/411
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I'll bet that's a nice smooth street engine too. Great job.
 
so it duration that makes the difference. just trying to better understand this whole thing, i plan on getting a running junkyard motor and replacing mine to keep it running then work on my original engine, it has a rod knock or something going on down low.also shorty headers are they worth it or stock manifolds for now headers im looking at are 700.00 +
 
pat d said:
so it duration that makes the difference. just trying to better understand this whole thing, i plan on getting a running junkyard motor and replacing mine to keep it running then work on my original engine, it has a rod knock or something going on down low.also shorty headers are they worth it or stock manifolds for now headers im looking at are 700.00 +
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Well yes, and LSA.

More duration will make it lope. Less LSA will make it lope.
 
roccodart440 said:
Wider LSA or wider centerline improves idle quality and will also yield less cylinder cranking pressure. It also broadens the powerband.
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LESS pressure? Its valve overlap ie less lobe separation which holds both valves open together thus lowering cylinder pressure.If it was how you said, you wouldnt need higher compression with a larger cam. :D
 
Yes, less pressure. It is intake valve closing time that controls cylinder pressure. Close the intake valve sooner, create greater cylinder pressure. Overlap involves the intake valve opening sequence and therefore has little to do with cylinder pressure but a great deal to do with idle quality (as already said by roccodart440). If you have two cams with same duration and lift but different LSA, the cam on the tighter lobe separation will close the intake valve sooner and increase the cylinder pressure.

Larger cams generally delay the closing of the intake and then use more static compression to maintain cylinder pressure. Grab a bunch of cam cards and look at the valve timing of bigger and smaller duration camshafts. Looking at the intake closing times make things obvious.

This might help also..........

Technical Specs & Information
 
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that was a cool chart IQ52 so a wider LSA is a little more street friendly how are the lunati cams any good?and can i reuse my stock lifters (magnum rollers) .
 
OK,I'm confused on the centerline and LSA..... I know they are two different things but they both affect the same things..... Is that right? My can has an LSA of 110 and a CL of 106..... Is it going to idle decently enough to have power brakes?
 
sport74 said:
OK,I'm confused on the centerline and LSA..... I know they are two different things but they both affect the same things..... Is that right? My can has an LSA of 110 and a CL of 106..... Is it going to idle decently enough to have power brakes?
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Yes, generally speaking. A cam in a 110 should be fine. It is more of a duration issue though. More duration equals less vacuum.
magnummopar said:
You are correct, I was tired and not thinking clearly, I should probably not answer posts when I am asleep.
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I'm with ya! And often corrected by yourself (thank you by the way!)

pat d said:
that was a cool chart IQ52 so a wider LSA is a little more street friendly how are the lunati cams any good?and can i reuse my stock lifters (magnum rollers) .
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The OE lifters can be reused.
The wider centerline is often used by Crane Cams. I like there stuff and have used ther cams several times.
I just got my first Lunati, but it is a solid roller. Not yet installed.
 
nothing like waiting for a hurricane to come and ruin your stuff is it gonna hit or miss ???
 
well that was great i think i saw a downed palm branch, car and truck ok hope everyone else on the coast is ok !!
 
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