274H06 Cam Swap - Page 2 - 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
lost password?   |   register now

LinkBack Thread Tools
  #16 (permalink)  
Old 01-25-2011, 06:11 AM
cobalt327's Avatar
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Posts: 5,031
Wiki Edits: 1616

Thanks: 128
Thanked 616 Times in 565 Posts
Originally Posted by jmabrao
mine cruises at about 2500 rpm on the freeway. It's a 700r4 Tranny, I kinda don't want to tear into the engine again I had never done a cam swap before so I was about to explode with anger lol
Freeing up the exhaust is critical-
Get as set of long tube headers and dual exhaust on it w/low restriction turbo-style mufflers. This will be reused w/any other SBC engine you may choose to run in the future- Vortec included.

Freeing up the exhaust like that WILL give you more of an aggressive idle, and you'll be able to hear that overlap.

Reply With Quote Quick reply to this message
Sponsored Links
  #17 (permalink)  
Old 01-25-2011, 06:17 AM
Last photo:
Join Date: Jun 2005
Location: St. Louis, MO
Age: 31
Posts: 9,544
Wiki Edits: 0

Thanks: 20
Thanked 404 Times in 377 Posts
Exhaust is extra critical on that cam because of the single pattern and tight LSA. I'd get some 1 5/8" long tube headers and then see how you like it. If that's still not enough go to a single 3" exhaust. You will notice a big power increase when you free up the exhaust and retune it. I wouldn't be surprised to see 30hp.
Reply With Quote Quick reply to this message
  #18 (permalink)  
Old 01-25-2011, 08:09 PM
BigEd36's Avatar
Registered User
Last photo:
Join Date: Nov 2009
Location: Auburn, IN
Age: 68
Posts: 454
Wiki Edits: 0

Thanks: 60
Thanked 66 Times in 57 Posts
I would think with the breathing freed up it should idle with a great sound. Here's a clip with the same cam in a basically stock Goodwrench 350.

Reply With Quote Quick reply to this message
  #19 (permalink)  
Old 01-25-2011, 08:23 PM
mud.man.rj's Avatar
Registered User
Last photo:
Join Date: Oct 2010
Location: canada
Posts: 418
Wiki Edits: 0

Thanks: 0
Thanked 66 Times in 61 Posts

If your compression is under the mid 9"s even with that 106 lsa you won't sound like you have a lot of overlap and sure will lose bottom end a real vacumn killer.
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply

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:
Please enter a password for your user account. Note that passwords are case-sensitive.
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:
Please select your insurance company (Optional)


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
LS1 Carb Swap and Cam Swap. Hacksaw Engine 27 12-15-2013 08:40 PM
456 gear swap to 373 in 8.5 rearend, carrier swap? leslie61 Transmission - Rearend 3 07-19-2009 03:45 PM
Tranny swap/ rearend swap? aggar Transmission - Rearend 2 03-16-2008 03:07 PM
86 K10 engine swap! swap tranny too? big_e111 Transmission - Rearend 3 08-03-2007 01:21 PM
Vin swap - firewall swap KenCam Hotrodding Basics 19 02-22-2007 10:44 AM

All times are GMT -6. The time now is 06:34 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2017, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.