Hot Rod Forum : Hotrodders Bulletin Board - Reply to Topic
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> over heating
User Name
Password
lost password?   |   register now

Thread: over heating Reply to Thread
Title:
  
Message:
Trackback:
Send Trackbacks to (Separate multiple URLs with spaces) :

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.



Additional Options
Miscellaneous Options

Topic Review (Newest First)
09-06-2012 06:19 PM
oldbogie
Quote:
Originally Posted by nova gary View Post
i have a 69 nova 350 keeps buildiing heat will run ok going down hyway but you can't drive it in town .have changed radators new pump took engine down everything is clean don't have room for a shrould even have put a 2inch 6 blade fan on .the rad is bigger then the three row but is only 2 row two i inch rows should hande 650 horse and i am pretty near stock rv cam with headers and 10.1 flat tops . thinking of reverseing my cluth fan .can anyone give me any ideas .sure would be thank full.
Typically overheating at low speeds or when stopped but idling is a pretty good sign that there is not enough air flow over the core of the radiator. Assuming you've got a large enough radiator in terms of core area which for a 350 would be about the equivalent of 30x19 inches. In copper/brass this would be a 3 or 4 tube core for aluminum 2 rows of 1 or 1-1/4 tubes. You would find that either of these types have a very similar rate of heat transfer so the coolant temps will be very similar in otherwise identical driving situations.

A shroud provides coverage of the perimeter of the core with a fan at the outlet end. When the fan is operating but the vehicle is not moving or doing so slowly the pressure inside the shroud is lower than atmospheric causing the outside air to be drawn in over the entire area of the core. Without a shroud in this condition the only air being drawn in is immediately before the fan which leaves a lot of potential heat transfer area doing little to nothing.

It really doesn't take much depth of shroud to make a big difference in temperature reduction. All that really needs to be satisfied is the perimeter of the radiator be enclosed and reasonably air tight around the edges of the front of the shroud while the fan needs to be covered by about 1/2 to 3/4 the twist depth of the blades. I've used deep baking sheets trimmed to fit the radiator and fan, built them from sheet metal, and laid up fiberglass on a skeleton of 1/4 inch hardware mesh as well as combinations of these methods to make an effective, well fitting and safe shroud. The fan end needs to be reinforced when using any of these methods as there is a lot of vibration of the shroud in this area from the fan.

Bogie
09-06-2012 05:25 PM
68NovaSS
Quote:
Originally Posted by bigdog7373 View Post
Search. And use punctuation, it's really hard to understand you. Overheating is discussed like 4 times a week, there's a TON of info on the site.
Looks like you're using a smart phone...like Big says, do a search here, it's at the top of the site page. The database is littered with hundreds of cooling and overheating threads.
09-06-2012 03:11 PM
bigdog7373 Search. And use punctuation, it's really hard to understand you. Overheating is discussed like 4 times a week, there's a TON of info on the site.
09-06-2012 02:35 PM
nova gary
over heating

i have a 69 nova 350 keeps buildiing heat will run ok going down hyway but you can't drive it in town .have changed radators new pump took engine down everything is clean don't have room for a shrould even have put a 2inch 6 blade fan on .the rad is bigger then the three row but is only 2 row two i inch rows should hande 650 horse and i am pretty near stock rv cam with headers and 10.1 flat tops . thinking of reverseing my cluth fan .can anyone give me any ideas .sure would be thank full.

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


All times are GMT -6. The time now is 01:23 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.