tune with no exhaust yet - 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 05-06-2002, 01:21 PM
Registered User
 
Last photo:
Join Date: May 2002
Location: Ohio
Posts: 16
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post tune with no exhaust yet

I have installed a 4.3L in a 1949 chevy pick-up with EFI, computer, the works. (In case you are wondering...Yes I know it's not a 350, and I did it because I wanted to)

I am trying to mess with the idle, guages and such but don't have an exhaust system on it yet. All I have are the headers bolted on. I was told that if I run the engine and let it get hot and then cool too quickly there is potential for the valves to crack. Is this true?

I was planning on getting it running and then driving it to the exhaust place...is this a bad idea? How do you guys do it? I can borrow a trailer and possibly get it over to get pipes put on but it doesn't run good enough to get it up on the trailer yet. How long is to long to run one without exhaust?

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 05-06-2002, 02:41 PM
F-1Rodder's Avatar
Member
 
Join Date: Feb 2002
Location: Seattle
Posts: 517
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

If you can drive it there safely without getting a ticket, it won't hurt the motor. I assume the engine has coolant and the fan works, has proper oiling etc. just no muffler and pipes.
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 05-06-2002, 03:01 PM
4 Jaw Chuck's Avatar
Hotrodders.com Moderator
 
Last photo:
Join Date: Mar 2002
Location: Manitoba, Canada
Age: 46
Posts: 5,097
Wiki Edits: 0

Thanks: 2
Thanked 116 Times in 93 Posts
Post

Tow it, trailer it, drag it with a rope anything but drive it. No you won't hurt anything but if the man catches you you are in for a world of hurt and it's not like they won't hear you. As a matter of fact when they caught me they said they just followed the sound.
__________________
Outlawed tunes from outlawed pipes
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 05-06-2002, 11:03 PM
Member
 
Join Date: Apr 2002
Location: waterman,ill
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

runnin the engine with open headers is not goin to hurt the motor, its when you shut it off is when the damage will occur unless you take proper precautions. I generally stuff rags in the collectors to prevent the rush of cool air back into the headers. this practice will allow the valves to cool at about the same rate as the rest of the engine and will prevent valve warp and seat crackin. and youll be able to drive the thing on the trailer. just make sure you put the rags back in after you get it up there...good luck
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 05-07-2002, 09:37 AM
New Member
 
Join Date: May 2002
Location: MT
Posts: 29
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Talking

i have never had a problem with valves running open pipes. i ran a 400 s.b.c. in a '75 landcruiser with open pipes for almost a year before getting any mufflers on it. no damage whatsoever. you want more proof? imca super stocks and sprint cars, headers right out the side, five grand for 25 laps, no problem. also, fyi, there is a clause in the law for "working on a macine" and if you do get pulled over just tell the cop your'e in transit to a repair shop. if you really want to go all-out call ahead and get a police escort. yes, it is true.

[ May 07, 2002: Message edited by: middspecauto ]</p>
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 05-07-2002, 10:04 PM
Member
 
Join Date: Apr 2002
Location: waterman,ill
Posts: 87
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Post

escorts are dictated by local ordinance and stare statute. nobody will ever get an escort in ILL. you will get told that they dont have time for that and that that is not their job. also that is what tow trucks are for. I vote trailer it there drive it home
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



All times are GMT -6. The time now is 12:29 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.