pick my cam
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Elder User
Joined: Jan 2004
Posts: 867
Likes: 0
From: Eastern Pa
pick my cam
Ready to order so I need some input.
73 F100 Shorty,390 ,std bore, trw forged pistons 9.6:1 cr
4:10 gears, 4spd, 4wd
Ported and polished heads, stock valves, headers
Performer intake, 700 Holley or Edelbrock
Stock ignition with Pertronix electronic
Adjustable rockers.
I'm not going off road and don't tow. Want to go fast in a hurry. Not a daily driver. I can't afford to go roller at this time or aftermarket heads. This is for fun. Comp recommended their 262h and I was looking at the 941 Crane.
Help me out here, and thanks.
73 F100 Shorty,390 ,std bore, trw forged pistons 9.6:1 cr
4:10 gears, 4spd, 4wd
Ported and polished heads, stock valves, headers
Performer intake, 700 Holley or Edelbrock
Stock ignition with Pertronix electronic
Adjustable rockers.
I'm not going off road and don't tow. Want to go fast in a hurry. Not a daily driver. I can't afford to go roller at this time or aftermarket heads. This is for fun. Comp recommended their 262h and I was looking at the 941 Crane.
Help me out here, and thanks.
Senior User
Joined: Jul 2002
Posts: 364
Likes: 0
From: Tucson USA
My thoughts:
I'm not familiar with Comp Cams, but I am currently running a Crane 941. It is a great cam, but it sounds like you want a little more. The 801 might make you happier. The only real concern there is a exhaust crutch it gives you, considering you are already ported/polished.
Since you just want to go fast and your 4x4 isn't too extremely heavy, don't be afraid to go big on the cam.
In short, 801 over the 941.
-Patrick
I'm not familiar with Comp Cams, but I am currently running a Crane 941. It is a great cam, but it sounds like you want a little more. The 801 might make you happier. The only real concern there is a exhaust crutch it gives you, considering you are already ported/polished.
Since you just want to go fast and your 4x4 isn't too extremely heavy, don't be afraid to go big on the cam.
In short, 801 over the 941.
-Patrick
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
According to DD2k, you pick up a little top end hp with the 801 over the 941, and lose about as much low end torque. At 9.6 you're very close to the low limit for compression for the 801.
Personally I'd go with the 941 for better fuel economy and for the better idle. But for your priorities, I think the 801 will work best. I did have an idea for using the 344341, which is a single pattern 288* cam, but DD2k shows less hp and torque than the 801.
If you get the compression up, that opens up some possibilites.
Personally I'd go with the 941 for better fuel economy and for the better idle. But for your priorities, I think the 801 will work best. I did have an idea for using the 344341, which is a single pattern 288* cam, but DD2k shows less hp and torque than the 801.
If you get the compression up, that opens up some possibilites.
Senior User
Joined: Jul 2002
Posts: 364
Likes: 0
From: Tucson USA
The 801 is a dual pattern cam, meaning that it has a longer exhaust duration than intake duration. This is a really great thing for stock flowing FEs, as they are restricted on the exhaust side. When you get into high flowing heads, be they ported or Aluminum, the extra exhaust duration can be deterimental.
Then again, Ratsmoker runs the 801 with pretty solid results. (where did that guy go, anyway?)
-Patrick
Then again, Ratsmoker runs the 801 with pretty solid results. (where did that guy go, anyway?)
-Patrick
Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Even on ported stock FE heads, I still think they can use a little extra exhaust duration. It helps with scavanging to a certain extent. The 801 has quite a bit of a dual pattern.
With the 941, you're at 381hp @ 5000rpm, and 433ft-lbs @ 3500rpm. The torque is nearly flat from 2000 up to 5000rpm.
With the 801, you're at 385hp @ 5000rpm, and 426ft-lbs @ 4000rpm. The torque curve isn't as flat as the 941, having more of a curve to it.
I think you'd be happier with the 941.
With the 941, you're at 381hp @ 5000rpm, and 433ft-lbs @ 3500rpm. The torque is nearly flat from 2000 up to 5000rpm.
With the 801, you're at 385hp @ 5000rpm, and 426ft-lbs @ 4000rpm. The torque curve isn't as flat as the 941, having more of a curve to it.
I think you'd be happier with the 941.
Elder User
Joined: Feb 2004
Posts: 835
Likes: 0
From: Fort Rucker, AL
With the minimum CR for the 941 and ported heads (exhaust will be hogged out to match the headers), will the 941 be a good cam?
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Post Fiend
Joined: Jan 2003
Posts: 8,600
Likes: 4
From: Iowa
Crane recommends 8.75 to 10.75 compression ratio for the 941, and 9.5 to 10.75 for the 801. So you're right in the sweet spot for the 941, and right at the lower limit for the 801.
FWIW, I'm running about 10:1 compression and ported C7AE-A's on my new 390. I cant tell you how it works yet since it's not in the truck yet. But DD2k seems to say it'll work good. I'll have actual dyno results in a few weeks if everything goes well.
FWIW, I'm running about 10:1 compression and ported C7AE-A's on my new 390. I cant tell you how it works yet since it's not in the truck yet. But DD2k seems to say it'll work good. I'll have actual dyno results in a few weeks if everything goes well.
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Hotshot
Joined: May 2003
Posts: 11,141
Likes: 25
From: south louisiana
Here's 3 more choices: Comp Cams 270H, 280H or the 292H. All will work with your comp ratio. Also the Crane 272 degree Energizer, little milder than the Comp Cams grinds though. The Comp Cams ones would also work with your low gears.
Last edited by baddad457; Nov 3, 2004 at 08:50 AM.