Cam Suggestions for a 540
10-08-2015 | 09:36 AM
#12
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From: Calgary, AB
Do you want a cam that simply makes a good number on the dyno pull, or a cam that opens and closes the valves gently, can be run with less spring pressure, less lift with longer spring life, and maybe sacrifice a few HP to do so?
Theres more to a good cam choice than the dyno number the engine makes, or where it makes its peak power.
Theres more to a good cam choice than the dyno number the engine makes, or where it makes its peak power.
My first priority is reliability. I am not interested in the big number per say rather a strong reliable 600-650 hp on 87 octane. The springs that are in the heads now are the stock AFR springs,coil bind I believe is over.800 so that is not a worry.
I am after an engine that makes useable power from 2-6000rpm, shifts well and does not have an appetite for parts !!
10-08-2015 | 11:33 AM
#13
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From: chicago
MT, Excellent questions!!
My first priority is reliability. I am not interested in the big number per say rather a strong reliable 600-650 hp on 87 octane. The springs that are in the heads now are the stock AFR springs,coil bind I believe is over.800 so that is not a worry.
I am after an engine that makes useable power from 2-6000rpm, shifts well and does not have an appetite for parts !!
My first priority is reliability. I am not interested in the big number per say rather a strong reliable 600-650 hp on 87 octane. The springs that are in the heads now are the stock AFR springs,coil bind I believe is over.800 so that is not a worry.
I am after an engine that makes useable power from 2-6000rpm, shifts well and does not have an appetite for parts !!
Dont get too far away from your max lift to coil bind distance. Too far is no good, too close is no good.
If youre going for longevity, hard to beat a true endurance spring from isky/psi or Pac
10-08-2015 | 01:07 PM
#14
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From: ft. myers, fl.
You could go with 6-8 degrees more duration or so and a Dart Tunnel Ram(lol).....shift your power up the rpm range a little.
Your boat won't need mountain moving torque and your drive obviously won't like it anyway.
Sounds like a good foundation you have. Those cubes and those heads want to be fed - so feed them.
Your boat won't need mountain moving torque and your drive obviously won't like it anyway.
Sounds like a good foundation you have. Those cubes and those heads want to be fed - so feed them.
10-08-2015 | 01:24 PM
#15
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From: Calgary, AB
Which spring # is in the heads ? Or stripe color, i wanna say the hyd roller spring that comes with afr heads is a "pioneer" spring.
Dont get too far away from your max lift to coil bind distance. Too far is no good, too close is no good.
If youre going for longevity, hard to beat a true endurance spring from isky/psi or Pac
Dont get too far away from your max lift to coil bind distance. Too far is no good, too close is no good.
If youre going for longevity, hard to beat a true endurance spring from isky/psi or Pac
Just got off the phone with AFR. The installed springs are the older 8031 spring max lift .750 for solid roller... Guess they will be going up for sale soon !!! Might also have a set of stainless exhaust valves, for sale, very soon too ..
10-08-2015 | 01:25 PM
#16
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From: On A Dirt Floor
10-08-2015 | 01:41 PM
#18
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From: chicago
Recently saw him at the SBI races. Asked him if he misses the go fast stuff. He said not really, mostly because , he felt there was nothing really new going on that technology wise that was much different than 10 years ago. Craig is a sharp guy.
If i was to get away from superchargers, and went back to NA, tunnel ram setups would be the route i would go.
If i was to get away from superchargers, and went back to NA, tunnel ram setups would be the route i would go.
10-08-2015 | 04:24 PM
#20
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From: On A Dirt Floor
I hit like because that would be great, but the OP and you and some others are going in a different direction with camshafts.
If the engine was to be designed around say a 6200rpm or so WOT rpm range, then the Dart Tunnel ram would be pretty much close to odeal. If he is going to stay with say 5400rpm and down (as it sounds now) then wouldn't really be worth the little extra effort and $$$$.
If the engine was to be designed around say a 6200rpm or so WOT rpm range, then the Dart Tunnel ram would be pretty much close to odeal. If he is going to stay with say 5400rpm and down (as it sounds now) then wouldn't really be worth the little extra effort and $$$$.
