camshaft recipe - 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 05-03-2007, 10:22 AM
pi71's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: TX
Age: 43
Posts: 349
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
camshaft recipe

69 camaro
350 (1973 or 74) casting
291 camel hump heads
headers
aluminum dual plane intake
edelbrock 600cfm carb non emission
HEI
auto tranny(for now)

What camshaft would wake this motor up? i cruise more than anything , rarely race. I want it reliable and not have to worry about driving in town.. or just leave the stock cam in? thanks

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-03-2007, 01:11 PM
FiveFeezy's Avatar
Fishing poles in the hot rod!
 
Last photo:
Join Date: Mar 2004
Location: Richmond, CA
Posts: 109
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Comp Cams 270 Magnum
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-03-2007, 01:29 PM
pi71's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: TX
Age: 43
Posts: 349
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
found this about the comp 270

. ""I got looking through some magazines and see an advertisement for Competition Cams. They made a bunch of Claims about their 270 magnum cam, and 90 percent of them turned out to be false. I even called comp cams and talked to their tech people, and they had nothing good to say about my performer cam that had been working good for me for so long. They said their 270 mag cam would work fine with my gears and compression ratio, and they said that I could even use a stock torque converter! I should have known better at this point, because the 270 mag specs out at 224,224 Int/Exh duration at .050 valve lift with .501,.501 Int/Exh lift.

Now, the performer specs out at:204,214 Int/Exh duration at .050 valve lift, and about (not positive on this part) .448,.472 Int/Exh lift. As you can see, the performer is much more mild than the 270 magnum, and I already knew at this point that the performer needed more than a stock stall speed to really take full advantage of the its powerband. But comp cams told me what I wanted to hear: 'You'll really be able to hear this cam idle'. So I bought it. And when I fired it up for the first time, underneath my carport with my good buddy who helped me install it, It sounded really tuff. I loved it!

Then I drove it. I could barely smoke the tires anymore (when in the past I could do it so easily it was almost annoying) and I also had a terrible bog off the line. My times at the track improved by only .06 (thats 6 HUNDRETHS) of a second, and gas and driveablility went south! My performer could have gone faster if I would have bought some better tires to hook it up.

Moral of the story: find someone you trust to help you decide what you need for your combo, and don't let that BAD idle fool you. Torque is what moves your car. Many manufacturers put nothing but Chevy or Ford grinds on an Olds cam. Compare the specs. "
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-03-2007, 01:46 PM
Malibu73's Avatar
'68 Chevelle Malibu Sedan
 
Last photo:
Join Date: Aug 2004
Location: Oregon
Age: 26
Posts: 353
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Check out the Voodoo series from Lunati, dyno tested to beat comps XE cams of similar grinds.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-03-2007, 02:05 PM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,021
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
Good story. And the moral is..... Do not over cam your engine! Especially a street engine.

You didn't say what gears or what torque converter you had but it sounds like the whole drive line is stock. So a mild cam is what you need.

Stock heads typically don't flow well on the exhaust side so more exhaust duration would be nice. Also, tighter lobe separation angles (LSA) will help out poor flowing stock heads.

I also like the Performer cam for your engine (204/214) but feel the LSA could be a little tighter (108 to 110). The compcam 270 requires gears, converter, and valve springs and would not be my first choice for a mild mannered street car. A 260H (212/212) would be the largest that I would recommend. A 252H makes a nice street cam (206/206) but those stock heads could benefit from a little more exhaust duration. Avoid the compcam xtreme cams, they have a history of going flat. Stay with a cam that has mild ramps, it will make a little less power, but it will live a long quiet life with a stock valve train.

A good combo for a 3.08 gear and autotrans with stock converter would be a set of 64cc edlebrock performer heads with a 260H or 252H cam. You are down in power because of the stock heads and teeny tiny stock cam (195/200).
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-03-2007, 02:06 PM
DeathRattle's Avatar
Some Punk Kid
 
Last photo:
Join Date: Oct 2006
Location: Michigan
Age: 28
Posts: 787
Wiki Edits: 0

Thanks: 0
Thanked 2 Times in 2 Posts
270 mag worked fine for me. the total package is needed. More compression, stall, gears. If that article is true he was just misled by the tech at comp cams. It doesnt make the cam itself bad because it wasnt installed with the right combo of parts.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 05-03-2007, 02:23 PM
pi71's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: TX
Age: 43
Posts: 349
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Quote:
Originally Posted by 454C10
but those stock heads could benefit from a little more exhaust duration. . You are down in power because of the stock heads ).
my heads are camel hump heads shouldnt they flow pretty good?
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 05-03-2007, 02:25 PM
pi71's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: TX
Age: 43
Posts: 349
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
will i see much gain from stock cam to a edelbrock performer cam 204/214 ?
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 05-03-2007, 02:59 PM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,021
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
Those old double humps were good in their day but don't compare very well to the new style heads.

Check out the site:

http://www.chevyhiperformance.com/te...ench_database/

Here as an example for the flow difference.

Performer head
lift Intake exhaust
.050 32 20
.100 64 44
.200 121 95
.300 174 134
.400 216 159
.500 235 177

462's
lift Intake exhaust
.050 18 27
.100 50 54
.200 119 88
.300 167 116
.400 198 128
.500 211 134


Yes, you will get a fairly big gain with the performer cam as compared to the stock cam. The gm crate engine use the performer cam as an optional upgrade on the goodwrench 350 engine.
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 05-03-2007, 03:10 PM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,021
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
check out this site:

http://www.sallee-chevrolet.com/fram...rformance.html


There are two 350 crate engines listed on this page. The difference is the cam.

Stock cam is 195/202 and the engine made 249hp at 5000 rpm and 304 ftlbs at 3500 rpm

With a 204/214 cam (performer cam) the engine made 285hp at 4600 rpm and 355ftlbs at 3600 rpm. That is +26hp and +51ftlbs with the slightly bigger cam.

And with better heads you could add another 25hp and another 35ftlbs of torque.
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 05-03-2007, 06:11 PM
pi71's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: TX
Age: 43
Posts: 349
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
ill probably never see those rpms, i wonder what the difference is at 4000 and under? im thinking when i pull the manifold if all is well ill leave it alone,
then again talking like this,,, maybe im on the wrong site..or getting old..lol
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 05-03-2007, 07:18 PM
F-BIRD'88's Avatar
Yada Yada Yada
 
Last photo:
Join Date: Oct 2005
Location: Ontario, Canada
Posts: 9,574
Wiki Edits: 0

Thanks: 3
Thanked 338 Times in 335 Posts
This lil Isky 262/270 HL hyd cam Is big enough to give you some power in the midrange (a step up from the Performer cam), yet not so big that It is like a 270magnum.
It's "just right".

262-270 Adv dur 208/216@.050" .435-.445 112LSA Fine with 3.08's and a stock converter. Easy cruiser. Would be great with a 3.73 rear gear. Lots of snap in the mid range, when ya want it. Yet easy cruising.

Last edited by F-BIRD'88; 05-03-2007 at 07:24 PM.
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 05-04-2007, 06:45 AM
Member
 
Last photo:
Join Date: Dec 2004
Location: San Antonio, Texas
Age: 50
Posts: 4,021
Wiki Edits: 0

Thanks: 0
Thanked 23 Times in 23 Posts
The difference under 4000 rpm is +51ftlb of torque at 3500 rpms. Like installing a 383.
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 05-04-2007, 12:42 PM
pi71's Avatar
Member
 
Last photo:
Join Date: Sep 2003
Location: TX
Age: 43
Posts: 349
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
wow thats quite a difference, thanks
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:
If you do not want to register, fill this field only and the name will be used as user name for your post.
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
Rotella Motor Oil boss350 Engine 14 04-17-2007 11:00 PM
Camshaft Basics automotive breath Engine 7 02-17-2007 11:16 AM
1998 Chevy Venture camshaft kberly54 Engine 2 07-14-2005 08:09 PM
How to choose correct camshaft Drag1racer Engine 0 07-08-2005 04:04 PM
camshaft riesman20 Engine 6 05-11-2004 05:04 PM


All times are GMT -6. The time now is 03:29 PM.


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.