Dyno sheet
08-03-2016, 08:46 PM
#11
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Without a doubt a nice reliable package however like SB said there is definitely power left on the table however for now I'd keep the oil changed and have fun. The 139661 cam is going to make most hp near 6,400-6,600. What do you have it propped for at WOT? The dyno sheet contradicts this especially showing peak torque at 4,650. I've personally not seen a dyno sheet like this with the rpm's not being sequential. SB what happened in the scribbled out area? I can see where the split is but why would this not be making more hp at 5,700? Is cam installed 8 deg adv? Lol. To OP I am just trying to figure this out and have it make sense with me. Cam vs hp. I am jealous of your find. Haven't heard one of these in a while. Similar to 68 Shelby found in old lady's barn out in the country on a gravel road. Ha. Congrats. I am happy for you.
Last 572 a buddy built , NA, AFR 335 CNC heads, with a 252* hyd roller, was done making power at 6 grand. Peak torque was right at 4600. This engine, had CNC ported heads, dominator carb, 454 R intake with mods, etc.
Looks to me like this cam he has, isn't all that big for the combo.
08-03-2016, 08:50 PM
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Crane Hydraulic Roller Cam #139661 : Advertised Duration 318°/326° , at .050 256°,264° , lift with 1.7 rockers .632", .632" , Lobe Separation Angle 114°
08-03-2016, 09:27 PM
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with a quick Google search it now even makes more sense. It's kinda like yes I get it but I don't get it. Lol Regardless 20 years ago or not. i haven't had much experience with these tuned port intakes but it would seem they they are definitely lacking cfm. Still making good power at low rpm but in my world it would be like putting restricter plates on well tuned carbed 572's. What I did find unique though was that the zz572 with 850 cfm carb and signed plane intake makes like 620 hp with nearly identacle cam however at 6k. So in a nutshell OP has kind of a unique package. Just lacking about 700 cfm.
08-04-2016, 12:02 AM
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I'll take a pic of the sheet later.
Last edited by Rookie; 08-04-2016 at 12:04 AM.
08-04-2016, 09:30 PM
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Without a doubt a nice reliable package however like SB said there is definitely power left on the table however for now I'd keep the oil changed and have fun. The 139661 cam is going to make most hp near 6,400-6,600. What do you have it propped for at WOT? The dyno sheet contradicts this especially showing peak torque at 4,650. I've personally not seen a dyno sheet like this with the rpm's not being sequential. SB what happened in the scribbled out area? I can see where the split is but why would this not be making more hp at 5,700? Is cam installed 8 deg adv? Lol. To OP I am just trying to figure this out and have it make sense with me. Cam vs hp. I am jealous of your find. Haven't heard one of these in a while. Similar to 68 Shelby found in old lady's barn out in the country on a gravel road. Ha. Congrats. I am happy for you.
(middle '90's) His company built Hi Po engines for race teams of the 80's & 90's He told me @ 3800 rpm the Mistress would run 60+ and it's attitude as if on rails....... (his words)
It's also a Kevlar hull.
08-05-2016, 11:35 AM
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What's it weigh?
Getrdunn............I'm pretty confident that the owner of Flagship Marine in Punta Gorda, FL. Built these engines to be dependable (very mild) he used the best technology at the time
(middle '90's) His company built Hi Po engines for race teams of the 80's & 90's He told me @ 3800 rpm the Mistress would run 60+ and it's attitude as if on rails....... (his words)
It's also a Kevlar hull.
(middle '90's) His company built Hi Po engines for race teams of the 80's & 90's He told me @ 3800 rpm the Mistress would run 60+ and it's attitude as if on rails....... (his words)
It's also a Kevlar hull.
08-05-2016, 12:56 PM
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Getrdunn............I'm pretty confident that the owner of Flagship Marine in Punta Gorda, FL. Built these engines to be dependable (very mild) he used the best technology at the time
(middle '90's) His company built Hi Po engines for race teams of the 80's & 90's He told me @ 3800 rpm the Mistress would run 60+ and it's attitude as if on rails....... (his words)
It's also a Kevlar hull.
(middle '90's) His company built Hi Po engines for race teams of the 80's & 90's He told me @ 3800 rpm the Mistress would run 60+ and it's attitude as if on rails....... (his words)
It's also a Kevlar hull.
I would have to agree. I wouldn't touch a thing until rebuild time. Impressive HP at low rpm. Gotta like that.
08-05-2016, 10:40 PM
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I don't know and would like to find out. For instance what is your Mistress hull weight?
I'm curious if the difference would be negligible or not between Kevlar and regular layup..........There was a picture posted of a Kevlar Mistress and
it's stern seemed lighter in the water.
I'm curious if the difference would be negligible or not between Kevlar and regular layup..........There was a picture posted of a Kevlar Mistress and
it's stern seemed lighter in the water.
