comp cams XE cams - Page 4 - 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
  #46 (permalink)  
Old 03-22-2010, 04:08 PM
Show me the money !
 
Last photo:
Join Date: Mar 2010
Location: Massachusetts
Age: 45
Posts: 183
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
First I want to thank EVERYONE for keeping this thread alive. I Like to get as many opinions, facts, and true experience before I make a decision on how to help or correct the issue at hand. From what Info I have gathered both from this thread and from locals, I have come to the conclusion that..

1 - as far as lash adjustment goes, Less is more , even if it is a bit noisy. So I am going to leave it at 1/2 turn.

2 - The noise is typical of my particular setup.

3 - I am going to try a different wt. oil

4 - It runs great, lots of power, if it ain't broke, don't fix it.

And last, PLEASE, if you have more to add to this thread, add it

Thanks again

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #47 (permalink)  
Old 04-04-2010, 08:49 PM
Registered User
 
Join Date: Sep 2009
Location: Mississippi Gulfcoast
Posts: 7
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have a 94 chevrolet truck with a TBI injected 383 with the Comp Cams XFI & lifters. I have had valvetrain noise issues since day one. Ticking noise/sewing machine noise that seemed to get worse when the engine was warm. I first adjusted the preload at 1/2 turn. It was quite when the engine was cold & then slowing start making the sewing machine sound. Then I readjusted them to 3/4 turn but the noise was louder so I backed them down to 1/2. The noise was never there when the engine was cold. Then I found this http://www.compcams.com/v002/Instruc.../COMP4-115.pdf. I adjusted them again but at 1/8 turn. No noise. Some mornings I will hear one or two that will tap for about 3 seconds. I will make sure that I read the instructions first from now on. I hope I didn't mess anything up. Only time will tell.
Reply With Quote Quick reply to this message
  #48 (permalink)  
Old 04-05-2010, 01:44 AM
New Member
 
Join Date: Apr 2010
Location: china
Posts: 1
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
comp cams XE cams

comp cams XE cams

--------------------------------------------------------------------------------<a href="http://www.ecplazazone.com " title="连接名"><img border="0" src="http://图片地址" width="862" height="266" alt="图片名注释">图片名</a>
图片代码


i saw a thead where someone use one of the XE cams from comp and had all kinds of valve train noise, and then a bunch of guys replied with post, baching the XE line, i had plans on putting the XE274 cam in my 385 but now im second guessing my self, i dont want all kinds of crazy valve train noise that makes the motor sound like crap

is this a cam i should stay away from?

if so what are some other cams that will work well with a 385, cast crank, scat rods, kb 18cc dished pistons, 0 deck with 200cc/ 64cc/ 2.02/ 1.60 heads?

the car is 3450lbs with driver, street/strip, 4.10's with beefed up 700R4
Reply With Quote Quick reply to this message
  #49 (permalink)  
Old 04-05-2010, 09:13 AM
Custom10's Avatar
my KARMA ran over my DOGMA
 

Last journal entry: SS
Last photo:
Join Date: May 2009
Location: Saskatchewan, Canada
Age: 49
Posts: 1,099
Wiki Edits: 0

Thanks: 18
Thanked 29 Times in 25 Posts
Quote:
Originally Posted by SSBlazer
I have a 94 chevrolet truck with a TBI injected 383 with the Comp Cams XFI & lifters. I have had valvetrain noise issues since day one. Ticking noise/sewing machine noise that seemed to get worse when the engine was warm. I first adjusted the preload at 1/2 turn. It was quite when the engine was cold & then slowing start making the sewing machine sound. Then I readjusted them to 3/4 turn but the noise was louder so I backed them down to 1/2. The noise was never there when the engine was cold. Then I found this http://www.compcams.com/v002/Instruc.../COMP4-115.pdf. I adjusted them again but at 1/8 turn. No noise. Some mornings I will hear one or two that will tap for about 3 seconds. I will make sure that I read the instructions first from now on. I hope I didn't mess anything up. Only time will tell.
Was this preload procedure done to 1/8 turn with the engine hot or cold? thanks
Reply With Quote Quick reply to this message
  #50 (permalink)  
Old 04-05-2010, 09:39 AM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 13,082
Wiki Edits: 326

Thanks: 775
Thanked 1,057 Times in 879 Posts
Quote:
Originally Posted by gongsi1234
comp cams XE cams

--------------------------------------------------------------------------------<a href="http://www.ecplazazone.com " title="连接名"><img border="0" src="http://图片地址" width="862" height="266" alt="图片名注释">图片名</a>
图片代码


i saw a thead where someone use one of the XE cams from comp and had all kinds of valve train noise, and then a bunch of guys replied with post, baching the XE line, i had plans on putting the XE274 cam in my 385 but now im second guessing my self, i dont want all kinds of crazy valve train noise that makes the motor sound like crap

is this a cam i should stay away from?

if so what are some other cams that will work well with a 385, cast crank, scat rods, kb 18cc dished pistons, 0 deck with 200cc/ 64cc/ 2.02/ 1.60 heads?

the car is 3450lbs with driver, street/strip, 4.10's with beefed up 700R4
Your static compression ratio is 9.75:1, so most any cam with around 225 to 235 degrees duration @ 0.050" will work well. Personally, I don't like the extreme cam grinds as I feel they apply excessive pressure at the lifter/lobe interface. I also don't care for increased ratio rocker arms for the same reason.
Here is an example of a hydraulic flat tappet cam that I might choose for your motor, that is if I were going to use a flat tappet cam. I refuse to use anything less than a roller camshaft any more due to all the flat tappet failures I see and hear about....
http://www.summitracing.com/parts/HRS-112031/
A roller hydraulic like this one might be a close choice....
http://www.summitracing.com/parts/HRS-110325-08/
WARNING: you should always counsel with the technician at the cam grinder's place of business for a recommendation before you purchase a camshaft for your motor.
Reply With Quote Quick reply to this message
  #51 (permalink)  
Old 04-05-2010, 04:18 PM
6426yy's Avatar
Member
 
Last photo:
Join Date: Nov 2003
Location: Macomb Il.
Age: 35
Posts: 555
Wiki Edits: 0

Thanks: 1
Thanked 1 Time in 1 Post
I'm running a Comp 4x4 XE 270 cam in my 454 and it is nice and quiet.... The valve train anyway.
Reply With Quote Quick reply to this message
  #52 (permalink)  
Old 04-07-2010, 06:15 AM
Registered User
 
Join Date: Sep 2009
Location: Mississippi Gulfcoast
Posts: 7
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by Custom10
Was this preload procedure done to 1/8 turn with the engine hot or cold? thanks

It should't make a differance with hydralic lifters. I adjusted them with the engine cold. I used the #1 firing, rotated the crank 360, & then adjusted the rest.
Reply With Quote Quick reply to this message
  #53 (permalink)  
Old 08-14-2012, 10:40 PM
Cridder's Avatar
Registered User
 

Last journal entry: 310 Small Block Chevy
Last photo:
Join Date: Oct 2010
Location: Nanaimo (Cedar) BC Canada
Posts: 61
Wiki Edits: 0

Thanks: 3
Thanked 2 Times in 2 Posts
BBC ex268

Quote:
Originally Posted by curtis73 View Post
I like comp's cams. I have heard all kinds of comp bashing but I assumed it was a Ford vs Chevy type of argument.

I have a Comp XE268H in my BBC and love it.
Im running the same cam in my BBC 461 with heavly reworked 049 heads and big tube headers and i dont think it makes as much power as the 270 magnum that it replaced.
Im not so sure the 268 is the best choice for free flowing heads and 2 1/8" headers as i think it may be over scavinging with the much longer exhaust duration. the 268 makes 488 horse in a 454 HO crate motor, i should have 500 horse but i wonder.
What are you running for heads?
Reply With Quote Quick reply to this message
  #54 (permalink)  
Old 08-15-2012, 01:09 PM
Registered User
 
Join Date: Nov 2011
Location: Virginia
Posts: 705
Wiki Edits: 0

Thanks: 0
Thanked 75 Times in 75 Posts
cridder,

First, note the date on the thread. It was "dead" before I ever came around here... (:-

XE268H has a little less duration than 270H. BBCs have exhaust ports that could be considered a little TOO "good" for the intake. That is, the balance of flow is a little lop-sided to the exhaust. So, it goes to follow, a cam with a little more intake duration and less exhaust duration WILL make more power.

That said, the XE cams (the smaller ones like the XE268H) are more for "low compression" drivers. The XE268H will work well in a 427-up with a stock torque converter. These cams are for a different purpose than the Magnums. We DID build a 396 a few years back with a solid roller XE grind. A 3,700 lb,. Chevelle went 12.10s with it. Oval ports, 92 octane. Good runner!

The point? XE cams have their place in the "pecking order". Good stuff when used "as intended".

Jim
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
comp extreme energy cams 86SSman Engine 10 03-12-2010 11:12 PM
Crane vs Comp Cam's 70 nova Engine 7 05-07-2009 07:49 AM
confused about camshafts (FSB) pstrbrc Engine 9 11-30-2008 08:02 PM
comp cams endur-x roller lifters 406 ss monte Engine 1 10-29-2007 03:15 PM
Comp Cams 46_stvblt Engine 6 01-22-2004 09:02 PM


All times are GMT -6. The time now is 03:14 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.