Comp Magnum 280 vs XE274? - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-29-2008, 03:13 PM
v8hed's Avatar
AK427
 
Last photo:
Join Date: May 2008
Location: Northampton, UK
Age: 39
Posts: 794
Wiki Edits: 0

Thanks: 1
Thanked 3 Times in 3 Posts
Comp Magnum 280 vs XE274?

Trying to decide between these two cams for my 355 SBC. Currently, I have an Edelbrock Performer RPM, which I've just taken out.

Is there much of a difference between them? I'd expect the XE grind to provide slightly bigger numbers on the dyno, but I'm anxious about the very fast ramps and the strain in puts on the valvetrain.

Car weighs 2,500lbs, has 3.54:1 gears and is a stick shift. Not a daily driver.

Would I benefit from going any bigger on the cam? Currently running stock heads, but will prob either install Edelbrock Performer RPM's (170cc runners), or Holley SysteMAX (184cc runners) heads. Static CR will be ~10.2:1.

Thanks,
Ian.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-29-2008, 03:37 PM
Registered User
 
Last photo:
Join Date: May 2008
Location: ohio
Posts: 1,585
Wiki Edits: 0

Thanks: 48
Thanked 65 Times in 62 Posts
Well I would go with the XE 274 it would give you better numbers wise and its more of a modern cam technology according to comp cams. The lift is a little more but not too much and lobe separation angle is the same so there would not be .much difference in sound at idle wise and they both would do about the same amount of wear on your valvetrain. I use to have a comp 292 wich is one step bigger then the 280 magnum and it was not bad. With that nice set up you got it would run good I am sure. I also read with recent problems with flat tappit cams going flat that comp said that they have had less xtreme energy cams go flat then the magnum ones so you might want to use that to decide with as well. Good luck I am sure it would do good with either one.
Eric
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-29-2008, 06:08 PM
dh79's Avatar
Member
 
Last photo:
Join Date: Dec 2002
Location: Vancouver, BC
Posts: 301
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by F-BIRD'88
Funny, you never hear of such problems with cam life from people running Isky stuff. My machinist swears by them.
www.iskycams.com
I'm sure isky are great, and I would consider using them. However, the reason you hear of less problems with isky is because far less people use isky. On the other hand you hear so much about comp cams problems is because they are extremely popular cams. The sheer numbers of them out there is way, way more than isky. I'm sure every cam manufacturer has a couple go bad. When you sell 100x more than another company, it'll come up on these forums more often. The relative failure rate is hard to judge and so far I haven't seen any real data.
__________________
81 Grand Prix, 355, 700r4, 8.5" 4.10
64 Oldsmobile Jetstar, all original
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Will a 280 comp cam go good with closed loop TPI Skinnypimpin931 Engine 3 10-04-2006 08:31 PM
Anyone with Comp XE274 cam? KNanthrup Engine 9 05-26-2006 12:38 AM
magnum 280 1969NovaSS Engine 4 09-05-2005 12:35 AM
What size of Pro Magnum Hydrulic Roller Comp Cam? Skunk Engine 3 07-02-2005 03:39 PM
Comp XE274 performance gpeak Engine 5 02-15-2004 03:46 PM


All times are GMT -6. The time now is 03:34 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.