Replacing cam, want suggestions

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I think I'd be lokoing at the XR286HR10 which is 236°/242.050 and just shy of .600 lift at the lifter. Normally a hydraulic roller will have ramps no faster than a std hydraulic because there is no way to stop the lifter compressing a little when the valve is accelerated off the seat initially. So they are taller with a smoother rate of lift. It also only requires 125lbs on the seat and about 285lbs over the nose so your springs are fine. You really need to use a cam that will allow the heads to work. After pushrod angle loss (which gets worse with hyd rollers) you're looking at losing .024" or so in gross lift at the valve. If the heads don't move air well until .550 the engine will be lazy if the cam doesn't get them open far enough and keep them open.
 
moper said:
I think I'd be lokoing at the XR286HR10 which is 236°/242.050 and just shy of .600 lift at the lifter. Normally a hydraulic roller will have ramps no faster than a std hydraulic because there is no way to stop the lifter compressing a little when the valve is accelerated off the seat initially. So they are taller with a smoother rate of lift. It also only requires 125lbs on the seat and about 285lbs over the nose so your springs are fine. You really need to use a cam that will allow the heads to work. After pushrod angle loss (which gets worse with hyd rollers) you're looking at losing .024" or so in gross lift at the valve. If the heads don't move air well until .550 the engine will be lazy if the cam doesn't get them open far enough and keep them open.
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Why do the Comp Hyd Rollers have less lift on the exhaust side, but most of their other cams have more lift on the exhaust side? I had looked at that cam, but kind of discounted it because of that.
 
Still trying to decide. I had kind of put it on the back burner for a while, but I'm finally ready to go back at it. I also realized that my converter is a 3200, not 2500 stall (turbo Action 19802S), so I can go more aggressive than originally thought. Now I'm looking at this one:http://cgi.ebay.com/ebaymotors/COMP...rQ5fTruckQ5fPartsQ5fAccessories#ht_3724wt_963

Or a custom grind. I think a cam similar to the one above, but with a little more exhaust lift, keeping the same duration, would be good. What do you guys think?
 
I ran the Lunati "voodoo" 60405 in my 416 excellent cam with good street manners,put my duster in the 11.0's...:thumrigh::thumrigh:
 
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