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Cam and valvetrain longevity....??? low duration high lift...

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Old 09-19-2016, 11:16 AM
  #161  
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I am tempted if someone wants to load intakes and carbs to see, I would run with hatch off boat for clearance, if it went 4 mph faster I would find a way to make it work.... Then again Dyno shows I'm using 850 CFm...... So not sure if it's the issue.
Originally Posted by bck
I'll bet anyone on here lunch and a drink should we meet up that the biggest power improvement this combo will see by far will come from carb/ intake changes. But he doesn't have the room on the boat so...
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Old 09-19-2016, 11:23 AM
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In response to post just above , hook vacuum gauge under carb and see what the vac is at WOT andtop rpm. This will tell you if carb is a decent restriction or not. Most carbs don't flow as advertised...just to add to confusion.
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Old 09-19-2016, 11:33 AM
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Not sure if I'm gonna get anymore trips out due to no reverse, unless I chance it one more time lol
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Old 09-19-2016, 03:51 PM
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Originally Posted by MILD THUNDER
What heads were on those packages? How much did they make at 6200 and then at 5800 after advancing them? How much advance did the cams have ground into them ?
Those cams were making 650 hp with just out of the box pro one 310's. I would amagine another 50 hp plus if heads and intakes were reworked.

I installed same cams and heads in/on a pair of 496's for project and made 600 hp plus @ 5,800 however used solid springs and lifters do to a combination of spring and hyd lifter issue that we discovered on the dyno. I didn't wanna mess around and take a chance on another set of hyd lifter failure. Lifters initially used were crower 66321. How much advance was ground into the cams initially I don't recall.
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Old 09-19-2016, 03:54 PM
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Originally Posted by Full Force
Not sure if I'm gonna get anymore trips out due to no reverse, unless I chance it one more time lol
Sounds like that might be a little more imminent at the moment.
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Old 09-19-2016, 04:04 PM
  #166  
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Well, forward works fine, I am told it may be a stuck valve, fluid looks good... I am going to look into that this week....

Originally Posted by getrdunn
Sounds like that might be a little more imminent at the moment.
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Old 09-19-2016, 04:25 PM
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Put some Lucas in it. Chit works miracles.
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Old 09-19-2016, 04:29 PM
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Sounds like your set on drive back ups and prolly trans as well but just in case I have 4 on the shelf. C72's. Two fresh rebuilds and two that came out of a running boat.
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Old 09-19-2016, 04:47 PM
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Originally Posted by getrdunn
Those cams were making 650 hp with just out of the box pro one 310's. I would amagine another 50 hp plus if heads and intakes were reworked.

I installed same cams and heads in/on a pair of 496's for project and made 600 hp plus @ 5,800 however used solid springs and lifters do to a combination of spring and hyd lifter issue that we discovered on the dyno. I didn't wanna mess around and take a chance on another set of hyd lifter failure. Lifters initially used were crower 66321. How much advance was ground into the cams initially I don't recall.
Shop by me recently built a 496 ci. 10.2:1, GM Rect port iron heads with a nice valve job, no port work. Cams were hyd roller 242/254 112 LSA, .679/.679 lift. Victor JR intake, holley EFI . Peak was 645HP at 6200, 595FT lbs at 5000, still making 575ft lbs at 4000. Pretty darn good considering the GM iron heads , not even ported imo.
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Old 09-19-2016, 04:55 PM
  #170  
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Originally Posted by cfm
by badss540 » Fri Dec 03, 2010 9:49 am

My 540 (built at SSRE) had 10 to 1, dart 325's,dart manifold,1090 BG carb,Merlin 3 block, (Crane)651 hyd roller and made 691 at the crank..
Originally Posted by MILD THUNDER View Post
700hp from a 540, with race car headers, 10:1 compression, really isnt setting the world on fire. .
I was giving an example of something similar to FF's builds but with Dominator and 651 cam....was dyno'd with no accessories and dyno headers.
HP is really not much greater when considering the differences - 10;1 compression/dominator. And the Crane 651 cam was mentioned in this thread as a go to 540 cam.

Last edited by SB; 09-19-2016 at 04:59 PM.
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