68 Olds 350 rebuild questions - 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> Hotrodding Basics
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 10-17-2011, 01:15 PM
Registered User
 
Join Date: Jul 2007
Location: Minnesota
Posts: 8
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
68 Olds 350 rebuild questions

Hi All,
Pulled the engine yesterday. It is a 68 Olds 350 Cutlass Convertible 2bbl, Jetaway Tran. Want to stay mostly stock but want to beef the motor up a bit. I want to swap to a 4bl, a little bigger than stock cam and headers. I want off the line power with a noticeable idle and street driveabilty. ANy suggestions for cam kit, intake and carb? I have the #5 heads so good flowing, any advantage to shaving them .10 or .20? Chasis is being redone too with all new polyurethane bushings etc.
thanks,
S.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 10-17-2011, 06:35 PM
Hot Rod Has Been
 
Last photo:
Join Date: Aug 2010
Location: Wisconsin
Age: 65
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 6 Times in 5 Posts
If you like a lumpy idle a lot of guys get the "Thumper" series cams from CompCams...
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 10-17-2011, 08:11 PM
bigdog7373's Avatar
Of course it's fast
 
Last photo:
Join Date: May 2010
Location: florida
Posts: 2,673
Wiki Edits: 0

Thanks: 13
Thanked 49 Times in 49 Posts
Quote:
Originally Posted by Mojo56
If you like a lumpy idle a lot of guys get the "Thumper" series cams from CompCams...
No! He said Off the line power, and drivability. The thumpr gives neither of those. Its all sound, no performance and will give you problems when trying to tune it.
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 10-18-2011, 02:37 PM
techinspector1's Avatar
Senior Curmudgeon
 
Last wiki edit: DynoSim combinations Last photo:
Join Date: Oct 2005
Location: Hemet, California, USA
Age: 72
Posts: 12,947
Wiki Edits: 326

Thanks: 760
Thanked 1,013 Times in 849 Posts
Quote:
Originally Posted by boese1978
ANy suggestions for cam kit, intake and carb? I have the #5 heads so good flowing, any advantage to shaving them .10 or .20?
You can't intelligently choose a cam until you know the exact static compression ratio of the motor. To know that, you'll have to do some measuring with precision instruments and pouring of volumes with a burette.

Take a look at this build....
http://www.mondellotwister.com/ArtOthr350s.htm
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 10-18-2011, 05:03 PM
BOBCRMAN@aol.com's Avatar
Member
 
Last photo:
Join Date: May 2002
Location: Holly, michigan
Posts: 8,130
Wiki Edits: 0

Thanks: 25
Thanked 267 Times in 250 Posts
Also. if you plan on making power on the street. You will need more head work. Hardened seats placed in the exhaust side and good exhaust valves. Most any pre -73 GM engine has soft seats not compatible with todays fuel.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 10-19-2011, 11:53 AM
Registered User
 
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 3,554
Wiki Edits: 1

Thanks: 6
Thanked 153 Times in 140 Posts
Quote:
Originally Posted by Mojo56
If you like a lumpy idle a lot of guys get the "Thumper" series cams from CompCams...
Oh yeah, all the crappy idle of a long overlap cam with none of the pesky extra horsepower...
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 10-20-2011, 03:05 PM
Hot Rod Has Been
 
Last photo:
Join Date: Aug 2010
Location: Wisconsin
Age: 65
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 6 Times in 5 Posts
Quote:
Originally Posted by bigdog7373
No! He said Off the line power, and drivability. The thumpr gives neither of those. Its all sound, no performance and will give you problems when trying to tune it.
I didn't say I recommended the Thumper cams... just mentioned them. Personally I'd choose almost anything except one...
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 10-20-2011, 03:38 PM
bigdog7373's Avatar
Of course it's fast
 
Last photo:
Join Date: May 2010
Location: florida
Posts: 2,673
Wiki Edits: 0

Thanks: 13
Thanked 49 Times in 49 Posts
Quote:
Originally Posted by Mojo56
I didn't say I recommended the Thumper cams... just mentioned them. Personally I'd choose almost anything except one...
Sureeeee
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 10-22-2011, 08:36 AM
Hot Rod Has Been
 
Last photo:
Join Date: Aug 2010
Location: Wisconsin
Age: 65
Posts: 187
Wiki Edits: 0

Thanks: 0
Thanked 6 Times in 5 Posts
Quote:
Originally Posted by bigdog7373
Sureeeee
I had my Hemi blower cam custom ground by George at Clay Smith... he furnished a cam that was a whole lot different than any of the off the shelf units. I wanted a smooth idle and a good low end... kinda like my old girlfriend.
Reply With Quote Quick reply to this message

Recent Hotrodding Basics 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
Olds 403 6.6L rebuild...need help 79TransAmMan Engine 14 03-15-2011 09:41 AM
455 Olds Rebuild JSBal59 Engine 5 07-22-2010 06:19 PM
403 Olds rebuild TommyV_11 Engine 42 10-26-2009 07:10 AM
350 olds rebuild 86 442 cutdog Engine 8 03-07-2007 06:36 PM
394 Olds rebuild spankyway Engine 0 01-31-2004 04:15 PM


All times are GMT -6. The time now is 07:32 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.