Cam experts - how will these three cams perform?
10-30-2006, 08:48 AM
#1
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Cam experts - how will these three cams perform? I have three cams I'm comparing, and I'm going to keep MFG names out of it right now because I am only interested in how these will perform with my LQ9 Radix (running at about 9 psi) in my big heavy truck. I have a 3000 stall converter with a 4L80E, 3.73 final gear. Interested in your thoughts on how you would expect the different cams to perform.
1:
216/224-551/551-115 with accelerated lift 1.8 roller rockers
2:
207/220-571/578-118.5 with stock rockers
3:
208/230-554/546-121 with stock rockers
If you recognize the cam profile and know the MFG, please leave it out, I want to keep this as objective as possible. TIA!
1:
216/224-551/551-115 with accelerated lift 1.8 roller rockers
2:
207/220-571/578-118.5 with stock rockers
3:
208/230-554/546-121 with stock rockers
If you recognize the cam profile and know the MFG, please leave it out, I want to keep this as objective as possible. TIA!
10-30-2006, 09:26 AM
#2
TECH Senior Member
Being a truck, I will say # 1 without accelerated lift rockers (if you're set on these I would use their 1.72. Higher lifts are not needed due to the FI effect so I would keep the cam docile on the valvetrain.
Another good contender is the Old Venerable 216/220 .525/.532 114+4 Comp cam
Another good contender is the Old Venerable 216/220 .525/.532 114+4 Comp cam
10-30-2006, 12:29 PM
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Originally Posted by PREDATOR-Z
Being a truck, I will say # 1 without accelerated lift rockers (if you're set on these I would use their 1.72. Higher lifts are not needed due to the FI effect so I would keep the cam docile on the valvetrain.
Another good contender is the Old Venerable 216/220 .525/.532 114+4 Comp cam
Another good contender is the Old Venerable 216/220 .525/.532 114+4 Comp cam
Originally Posted by Slowhawk
I've used 2 of those in customer's trucks.Not impressed with them at all.The Cams can definitely go bigger with a much better gain in the low /mid area of the powerband.
Originally Posted by vettenuts
I got 40 hp from the cam behind door #1 with the Crane 1.8 rockers. If you go this route, then spring selection will be critical. Since you don't want to mention vendors, PM me for more information if you need it.
10-30-2006, 05:03 PM
#6
You will lose a little with cam 1 going back to 1.7's (assuming Crane rockers), other 1.7's may lose more. I installed the Crane 1.7's on my Dart heads because the 1.8's were right on the edge of spring capability so I traded off some lift for some longevity on the valve train. I do like the Crane rockers in general though, and still have the 1.8's asleep in the basement 
