Would you change anything in this combo? 509 SC Carb
02-01-2007 | 11:00 PM
#32
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From: Chicago il
Re: Would you change anything in this combo? 509 SC Carb
intercooled Whipples at 5500 rpm.I make 765 hp at 5500. I did one pull to 6000 and made 825 at 10 psi. I set rpm limit low so I can't get nuts with it. Mine idles at around 750-800
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02-05-2007 | 03:29 AM
#33
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From: Stockholm, Sweden
Re: Would you change anything in this combo? 509 SC Carb
What about the generations and cam choices? Which generation is my Merlin II comparable to?!
Are there different generations of the Merlin II's as well as the GM blocks?!
Can I really use an Gen VI cam in my block?!
Are there different generations of the Merlin II's as well as the GM blocks?!
Can I really use an Gen VI cam in my block?!
02-06-2007 | 10:56 AM
#34
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From: Stockholm, Sweden
Re: Would you change anything in this combo? 509 SC Carb
What about KE's special ground 114LSA cams on there web site?
What do you think of the characteristics with the 295-113008 and 112508 in idle, low and high rpms?
Where will the peak HP be on the rpm curve?
What do you think of the characteristics with the 295-113008 and 112508 in idle, low and high rpms?
Where will the peak HP be on the rpm curve?
02-06-2007 | 11:39 AM
#35
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From: KY
Re: Would you change anything in this combo? 509 SC Carb
I think the 3008 is to big (Probably for 6500 rpm). It is LARGER than Crane 651 cam mentioned above. I think the 2508 is too small (smaller than stock 500EFI cam)
For what you are trying to do you need to look hard at this cam....this part # is for Gen VI...you need the grind for a Mark IV block.....
http://cranecams.com/index.php?show=...41&lvl=2&prt=5
If you want custom grind for your application I would PM RMBuilder to give you a recommendation.
For what you are trying to do you need to look hard at this cam....this part # is for Gen VI...you need the grind for a Mark IV block.....
http://cranecams.com/index.php?show=...41&lvl=2&prt=5
If you want custom grind for your application I would PM RMBuilder to give you a recommendation.
Last edited by jdnca1; 02-06-2007 at 11:49 AM.
03-19-2007 | 04:05 AM
#37
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From: Stockholm, Sweden
At last almost everything is ordered. 
A superchiller, KPM sea strainer and intercooler strainer, new valves, all new bearings, AN hoses and fittings, Gen III exhaust, Hardin Marines largest thermostatic oil cooler, piston rings and a bunch of other things.
All that is left is to finish the deal with RMBuilder for a new hyd roller cam, lifters and springs.
A superchiller, KPM sea strainer and intercooler strainer, new valves, all new bearings, AN hoses and fittings, Gen III exhaust, Hardin Marines largest thermostatic oil cooler, piston rings and a bunch of other things.
All that is left is to finish the deal with RMBuilder for a new hyd roller cam, lifters and springs.
Last edited by tomas_wallin; 03-19-2007 at 04:24 AM.
03-19-2007 | 02:54 PM
#38
Frank's Marine Service
Joined: Sep 2002
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From: Elkton, MD
I dont think I would do a hydraulic roller in a blower. I think a hydraulic flat tappet is more reliable on a blower motor. A blower overcomes cam timing. In my opinion, I think you do not gain much from Hydraulic rollers with blowers but you put a l lot of strain on the roller. That increases failure and rebuild times. We have used just the larger B&M cams here for years on blower motors and they seem to work great. Getting too much cam blows the charge out the exhaust. It looks like the cam you have is very close to that B&M cam.
I too thought the same thing when we built my motors the first time but learned the harsh reality when I wiped out a cam lobe/lifter an hour after break/in...
Once we got things squared away I ran the motors for two seasons but was always waiting for the cam to go away so I scrapped it and I'm going with rollers.
07-24-2007 | 03:17 AM
#39
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From: Turku, Finland
Even Comp Cams recommends using diesel oils not only running in but constantly on their flat tappets.
They recommend Shell Rotella X.
Itīs because Diesel oils still has the additives that protects engines still in them.
They recommend Shell Rotella X.
Itīs because Diesel oils still has the additives that protects engines still in them.
