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Custom Dodge Ram Performance Mods - Engine - 5.2 Liter V8 Discuss modifying your Dodge Ram with Performance Parts and Accessories!


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  #1  
Old 01-10-2013, 07:20 PM
nicraage nicraage is offline
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Default Will this camshaft be oK?

I've been reading and watching videos all day, and I'm still clueless on cams.

I have a 2001 ram 4x4 with a 5.2L bored 30 over. 4:56 gears, headers, dual exhaust, CAI. 5" lift with 35" tires, and I have a superchips tuner.

I just ordered some new odessa heads: http://www.ebay.com/itm/NEW-DODGE-JE...60887572819%26

I'm looking for a cam that will improve my low end and mid range a bit, without destroying top end. I've read my year truck has 9.1 compression ratio. How does this cam look, or any recommendations?

Brand:Summit Racing

Manufacturer's Part Number:SUM-1789

Part Type:Camshafts

Product Line:Summit Racing Street & Strip® Camshafts

Summit Racing Part Number:SUM-1789



Cam Style:Hydraulic flat tappet

Basic Operating RPM Range:1,500-5,200

Intake Duration at 050 inch Lift:216

Exhaust Duration at 050 inch Lift:216

Duration at 050 inch Lift:216 int./216 exh.

Advertised Intake Duration:272

Advertised Exhaust Duration:272

Advertised Duration:272 int./272 exh.

Intake Valve Lift with Factory Rocker Arm Ratio:0.454 in.

Exhaust Valve Lift with Factory Rocker Arm Ratio:0.454 in.

Valve Lift with Factory Rocker Arm Ratio:0.454 int./0.454 exh.

Lobe Separation (degrees):110

Computer-Controlled Compatible:No

Valve Springs Required:Yes

Camshaft Manufacturers Description:Fair idle, good low midrange power. Largest stock engine cam, but works best with 9:1 and higher compression and gearing.

Thanks

Last edited by nicraage; 01-10-2013 at 07:23 PM.
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  #2  
Old 01-10-2013, 09:49 PM
Gen1dak Gen1dak is offline
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Nope.
First clue is the hydraulic flat tappet description. You have a roller cam and roller tappets. They do not mix with flat tappet cams and tappets. Retrofitting to flat tappets, while possible, is not cost effective, and is becoming even less attractive with motor oils changing in such a way as to be less friendly to flat tappets. Stick with the rollers.
Second, the 110 degree lobe separation. The same cam specs with a 112-114 degree lobe separation would be a sweet cam, smooth and with great midrange power and better upper range power, and totally compatible with your computer. Running with 110 degrees separation would require computer work.
Third. It clearly states the cam is not compatible with computer-controlled systems (again, because of the lobe separation).
Check this out:
http://www.compcams.com/Company/CC/c...?csid=659&sb=2

Last edited by Gen1dak; 01-10-2013 at 09:58 PM.
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  #3  
Old 01-13-2013, 12:11 AM
nicraage nicraage is offline
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Quote:
Originally Posted by Gen1dak View Post
Nope.
First clue is the hydraulic flat tappet description. You have a roller cam and roller tappets. They do not mix with flat tappet cams and tappets. Retrofitting to flat tappets, while possible, is not cost effective, and is becoming even less attractive with motor oils changing in such a way as to be less friendly to flat tappets. Stick with the rollers.
Second, the 110 degree lobe separation. The same cam specs with a 112-114 degree lobe separation would be a sweet cam, smooth and with great midrange power and better upper range power, and totally compatible with your computer. Running with 110 degrees separation would require computer work.
Third. It clearly states the cam is not compatible with computer-controlled systems (again, because of the lobe separation).
Check this out:
http://www.compcams.com/Company/CC/c...?csid=659&sb=2
I very much appreciate the response, and I've been doing my best to absorb that info. I can't seem to find a compcam for under $300.

I did however find the following: This is a 'roller cam'

could you tell me what type of performance I should expect with the following:
Stage 1
Type Hyd.
.050'' Dur. Int. 184
.050'' Dur. Exh. 193
Cam Lift Int.'''' .258
Cam Lift Exh.'''' .269
Valve Lift Int.'''' .387
Valve Lift Exh.'''' .403
C/L Int 109
C/L Exh 115
Lash Int.'''' Hyd.
Lash Exh.'''' Hyd.
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Old 01-13-2013, 04:15 PM
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You're probably not going to like my first bit of advice; if this were my truck the first thing I'd do is swap in a 360. 318 is a very good engine (I've owned several over the years) but it is a smaller bore short stroke engine like its sibling the 340. The 360 was designed from the get go to be a heavy car/truck engine. Long stroke, long rod, bigger crank mains than the others in the family. This is why only cyl heads and intake manifolds are interchangeable among the 273-'67+318-340-360. The 360 is a much torquier engine right off the bat.

Since this is most likely not an option for you, you need to stick with a hyd roller cam since that is what your engine is designed to be run with. I would get on the phone with Hughes engines, these guys have been messing with Mopars for YEARS. Give them all your specs (what heads, type of vehicle, gears, converter, etc) and they can recommend a cam they have or what to get ground for your combination. The gears were a great decision, as they will help that little engine get that big old lifted truck moving. An aftermarket torque converter with a little bit higher stall speed might help as well.
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  #5  
Old 01-13-2013, 09:58 PM
Gen1dak Gen1dak is offline
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Quote:
Originally Posted by nicraage View Post
I very much appreciate the response, and I've been doing my best to absorb that info. I can't seem to find a compcam for under $300.

I did however find the following: This is a 'roller cam'

could you tell me what type of performance I should expect with the following:
Stage 1
Type Hyd.
.050'' Dur. Int. 184
.050'' Dur. Exh. 193
Cam Lift Int.'''' .258
Cam Lift Exh.'''' .269
Valve Lift Int.'''' .387
Valve Lift Exh.'''' .403
C/L Int 109
C/L Exh 115
Lash Int.'''' Hyd.
Lash Exh.'''' Hyd.
That looks disturbingly like the specs for a stock 5.2 LA (pre-Magnum) cam. Total CRAP (pathetic lift and duration specs- I'm amazed they ran as well as they did). Your stock 5.2 Magnum cam is better than that one. Roller cams run 2-3 times the cost of flat tappet cams, and the roller cam you listed is probably fairly cheap because it's, again, CRAP. Count on $300 bucks as an entry-level price, closer to $350. Find one cheap and it's most likely damaged or a stocker, either way, all together now.....CRAP.
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  #6  
Old 01-25-2013, 02:28 PM
nicraage nicraage is offline
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I emailed compcams, and a gentlemen recommended the same Cam that Gen1dak suggested in the first response to me. What originally concerned me was that cam advertises that it is for years 2000 and prior, but the tech assured me it was for my motor,, so thank you again Gen1dak.

So, I've loosened my purse strings, and am going to order one. According to the tech I need to upgrade my springs, but he didn't have any specific suggestions.

any thoughts on springs? Here is a list from Mopar performance. I'm not sure if the one listed for this engine "1 P4876062 Valve Spring, 5.2L/5.9L Magnum Jeep/Truck" is considered stock, or if it will work

1
P5249464 Valve Spring, 3.9L/ 5.2L/ 5.9L Magnum Jeep/Truck

1
P4876062 Valve Spring, 5.2L/5.9L Magnum Jeep/Truck

1
P4876063 Valve Spring, Single, HP Jeep V-8

1
P4286813 Valve Spring, Single, 0.380"/0.450" Lift

1
P4286812 Valve Spring, Single, 0.430"/0.460" Lift

1
P4120249 Valve Spring, Single, 0.430"/0.500" Lift

1
P3690933 Valve Spring, Single, 0.440"/0.500" Lift

1
P5249847 Valve Spring, Single, 0.480"/0.535" Lift

1
P5249848 Valve Spring, Single, 0.480"/0.540" Lift

1
P3614542 Valve Spring, Double, 0.500"/0.610" Lift

1
P3412068 Valve Spring, Double, 0.500"/0.620" Lift

1
P2806077 Valve Spring, Double, 0.500"/0.610" Lift

1
P2946353 Valve Spring, Double, 0.520"/0.700" Lift

1 P4876064 Valve Spring, Double, 0.590"/0.640" Lift

Also, what about pushrods? I'm clueless, and my heads should be here soon. Thanks.

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  #7  
Old 01-25-2013, 04:59 PM
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Personally, id stray away from 110* LSA because you'd lack drivability. I'd go 114*
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Old 01-26-2013, 12:02 AM
Gen1dak Gen1dak is offline
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Pushrods. Something on the order of these from Mopar Performance. P5249662.
The P5249464 springs have plenty or room to match the cam in question.
You should also upgrade to these matching (stronger) spring retainers P4452032.
I have the '464 springs. Got them for a modded 5.9 Magnum. Nice beefy units, but are the standard cylindrical shape, not the "beehive" shape like the stockers. You could pop for a beehive set from Comp, but it's still kinda pricey. Still cheaper to go conventional and that's another reason you need the matching retainers. The beehive units have smaller retainers that will not fit the more conventional '464's. Several years ago I scored a real bargain and got some NOS drop forged 426 Hemi retainers on the cheap. I got the set for $25! The Gen 2 Hemi (the 426 of the late 60's) and the Magnum 5.2/5.9 share the same valve stem diameter, and those retainers fit like a glove. At the time, Hemi hadn't re-entered the market in new vehicles. Point being, I looked recently and thanks to all the hooplah, those 426 retainers ain't cheap no more!

Last edited by Gen1dak; 01-26-2013 at 12:19 AM.
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