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Old 07-20-2007, 12:13 PM
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Default Solid Roller Cam Choice

After speaking with most of the major cam manufacturers, I've come up with two grinds what I feel are close to what I need for this motor. I'd appreciate input from you folks who have experince with this type combo. Thanks.
@50 @50
Gross Lift Int. Exh. Dur-Int. Dur.-Exh. Centerline
Isky: .650 .654 282 288 112
Crower: .707 .700 270 278 112

The application is a 500 CI 8:1 Static Comp. non intercooled blower motor, 8 pds boost. 350 cc runner Canfield Aluminum Heads. Stainless Marine Exhaust 4" wet and no mufflers. 4000-4500 Pd boat that needs to still pull skiers, haul ass at river and travel in ocean 35 miles out or so and back reliably. Thanks for input folks.....
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Old 07-20-2007, 01:11 PM
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Cam grinds look good, but I don't think the wet exhaust will like the cams much, with them cam choices, you will need to run dry pipes, or you will probably have water reversion probs. just my .02
John

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Old 07-20-2007, 02:28 PM
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Originally Posted by Fenderjack
Cam grinds look good, but I don't think the wet exhaust will like the cams much, with them cam choices, you will need to run dry pipes, or you will probably have water reversion probs. just my .02
John
Thanks, I agree however My exhaust drops well over 14" b-4 the water enters the exhaust stream.
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Old 07-20-2007, 02:50 PM
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dam that cam is bigger t han my 598 ci im ronning 254 n260 575 575 easy on valve train but will be going larger this fall thats alot of duration for pulling skiers i think leaving alot of tourque down low maybe im no expert by no means though
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Old 07-20-2007, 05:10 PM
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Originally Posted by ROB FREEMAN
dam that cam is bigger t han my 598 ci im ronning 254 n260 575 575 easy on valve train but will be going larger this fall thats alot of duration for pulling skiers i think leaving alot of tourque down low maybe im no expert by no means though
Are you blown? I ran normally aspirated last year on the same motor 612 I & E lift. 240 & 245 Duration on a 112 centerline and is way too small for my now blown application...
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Old 07-20-2007, 05:39 PM
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I like the Crower. We had a Bullet cam with I697, E 697, 262 and 272 duration. Pulled like hell on the big end.
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Old 07-20-2007, 06:02 PM
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Originally Posted by HighPriority
I like the Crower. We had a Bullet cam with I697, E 697, 262 and 272 duration. Pulled like hell on the big end.
Me too. How was it mid range? Any cruise problems? Idle behavior? Thanks.
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Old 07-20-2007, 06:06 PM
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Originally Posted by ghittner
Are you blown? I ran normally aspirated last year on the same motor 612 I & E lift. 240 & 245 Duration on a 112 centerline and is way too small for my now blown application...
im sorry didnt notice the blown part my bad !! continue on told you i was no expert.
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Old 07-20-2007, 07:51 PM
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Originally Posted by ROB FREEMAN
im sorry didnt notice the blown part my bad !! continue on told you i was no expert.
All good mate!
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Old 07-22-2007, 12:32 PM
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Originally Posted by ghittner
After speaking with most of the major cam manufacturers, I've come up with two grinds what I feel are close to what I need for this motor. I'd appreciate input from you folks who have experince with this type combo. Thanks.
@50 @50
Gross Lift Int. Exh. Dur-Int. Dur.-Exh. Centerline
Isky: .650 .654 282 288 112
Crower: .707 .700 270 278 112

The application is a 500 CI 8:1 Static Comp. non intercooled blower motor, 8 pds boost. 350 cc runner Canfield Aluminum Heads. Stainless Marine Exhaust 4" wet and no mufflers. 4000-4500 Pd boat that needs to still pull skiers, haul ass at river and travel in ocean 35 miles out or so and back reliably. Thanks for input folks.....
I talked with Dave Crower and gave him the specs for the canfield flow #'s, he changed his specs on the design to the following:
@50 @50
Gross Lift Int. Exh. Dur-Int. Dur.-Exh. Centerline
Isky: .650 .654 282 288 112
Crower: .694 .723 267 276 112
Crower Adv- 299 310
Input.....................?

Also, he wants to change the firing order for a 4,7,3,2 switch.
What about that also?
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