Go Back  Offshoreonly.com > Technical > General Q & A
Solid Roller Cam Choice >

Solid Roller Cam Choice

Notices

Solid Roller Cam Choice

Thread Tools
 
Old 07-20-2007 | 12:13 PM
  #1  
Thread Starter
Registered
 
Joined: Dec 2005
Posts: 390
Likes: 0
From: Mission Viejo, CA
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.....
ghittner is offline  
Reply
Old 07-20-2007 | 01:11 PM
  #2  
Fenderjack's Avatar
Pirate of the Chesapeake
 
Joined: Aug 2006
Posts: 4,330
Likes: 0
From: North Point Creek, Md.
Default

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

Last edited by Fenderjack; 07-20-2007 at 01:18 PM.
Fenderjack is offline  
Reply
Old 07-20-2007 | 02:28 PM
  #3  
Thread Starter
Registered
 
Joined: Dec 2005
Posts: 390
Likes: 0
From: Mission Viejo, CA
Default

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.
ghittner is offline  
Reply
Old 07-20-2007 | 02:50 PM
  #4  
ROB FREEMAN's Avatar
Registered
 
Joined: Sep 2006
Posts: 2,123
Likes: 2
From: Wis
Default

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
ROB FREEMAN is offline  
Reply
Old 07-20-2007 | 05:10 PM
  #5  
Thread Starter
Registered
 
Joined: Dec 2005
Posts: 390
Likes: 0
From: Mission Viejo, CA
Default

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...
ghittner is offline  
Reply
Old 07-20-2007 | 05:39 PM
  #6  
Registered
 
Joined: Mar 2002
Posts: 1,089
Likes: 0
From: Boydton Va.
Default

I like the Crower. We had a Bullet cam with I697, E 697, 262 and 272 duration. Pulled like hell on the big end.
HighPriority is offline  
Reply
Old 07-20-2007 | 06:02 PM
  #7  
Thread Starter
Registered
 
Joined: Dec 2005
Posts: 390
Likes: 0
From: Mission Viejo, CA
Default

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.
ghittner is offline  
Reply
Old 07-20-2007 | 06:06 PM
  #8  
ROB FREEMAN's Avatar
Registered
 
Joined: Sep 2006
Posts: 2,123
Likes: 2
From: Wis
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.
ROB FREEMAN is offline  
Reply
Old 07-20-2007 | 07:51 PM
  #9  
Thread Starter
Registered
 
Joined: Dec 2005
Posts: 390
Likes: 0
From: Mission Viejo, CA
Default

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!
ghittner is offline  
Reply
Old 07-22-2007 | 12:32 PM
  #10  
Thread Starter
Registered
 
Joined: Dec 2005
Posts: 390
Likes: 0
From: Mission Viejo, CA
Default

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?
ghittner is offline  
Reply


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.