Activity Stream: Show All | New Threads | New Posts | New Pictures | Popular Threads | Lonely Threads | Vendor Threads | New Picture Comments | New Profile Comments |
Search:  
Go Back   Camaro Forums - Chevy Camaro Enthusiast Forum > 1st Generation (1967-1969) > 67-69 Drivetrain > 67-69 V8 Tech
Sign in using an external account
Register Forgot Password?

Reply
 
 
 
 
LinkBack Thread Tools Search this Thread
  #1  
Old 04-18-2013, 08:54 PM
In the Staging Lanes
No cars in jeu510's garage, add now
 
Join Date: Sep 2011
Location: sacramento, ca
Posts: 73
iTrader: (0)
Default radiator size

what size radiator should i use if im running a 383 stroker with 2 10" electric fans? i have a 2 core aluminum radiator with 160 thermostat, but its seems to not be enough cooling.....it just keeps climbing even when the fans are on....any thoughts? should i get a 3 core or 4 core radiator?
Reply With Quote
  #2  
Old 04-20-2013, 09:22 AM
1971BB427's Avatar
Second Generation Moderator
Feb 2010 ROTM winner
Jan 2013 ROTM winner
ROTM Winner's Club
1950 Mini sedan
My Garage
 
Join Date: Aug 2008
Location: Portland, Or
Posts: 8,677
iTrader: (0)
Default

Might not need to be any bigger, but a double or triple pass will aid cooling significantly. You didn't mention the dimensions on your present radiator, and whether the fans are pushers or pullers. Pullers work much better. Width is usually either 26" or 30", so a 30" will give you a bit more cooling, but require the support to be opened up for it, if you have the 26" now.
Summit has a 26" that's a triple pass for $189 with welded tanks, and have GM outlets. I've got one on an OT build, plus used them on a couple other builds. They work very well.
Reply With Quote
  #3  
Old 04-20-2013, 09:42 AM
Camaro 69's Avatar
Senior Moderator
January 2010 ROTM Winner
No cars in Camaro 69's garage, add now
 
Join Date: Oct 2007
Location: The 'Burbs of Chicago
Posts: 16,747
iTrader: (0)
Default

I have a dual row, 3" thick aluminum radiator, running a single 14" electric fan, and my stroker runs as cool as a cucumber. Overall tank-to-tank width is 28 3/8" and fits in the stock opening (with drilling new mount holes in the core support). You don't/shouldn't need to go oversize.
1) get rid of the 160 thermostat and put in a 180. That will give the coolant more time to spend in the radiator to cool off. If that helps, but not enough, try a 195. For some reason, guys seem to mistakenly think that a lower rated stat means a cooler running engine.
2) Check your ignition timing. If it's too far out of whack, it can make your engine run too hot.
__________________


393 Stroker, Tunnel Ram, Dual Holley's
"I only live for today, but I'm one day behind"

Eats Rice and Poops Out Fords.
Reply With Quote
  #4  
Old 04-22-2013, 07:54 PM
In the Staging Lanes
No cars in jeu510's garage, add now
 
Join Date: Sep 2011
Location: sacramento, ca
Posts: 73
iTrader: (0)
Default

ok...i'll try putting in a 180 thermostat and see....what do you guys think running hot is? my old 327 use to run at 180 but now its running at 215-220...i never got it higher than 220 so dont know if it will actually run higher...
Reply With Quote
  #5  
Old 04-22-2013, 09:35 PM
Camaro 69's Avatar
Senior Moderator
January 2010 ROTM Winner
No cars in Camaro 69's garage, add now
 
Join Date: Oct 2007
Location: The 'Burbs of Chicago
Posts: 16,747
iTrader: (0)
Default

I think mine may have hit 200 once, in traffic. Usually it's around 180 on the open road, unless I'm zinging the rpm's high, then it'll hit 190-195. 215-220 is very toasty (way too hot for my liking).
__________________


393 Stroker, Tunnel Ram, Dual Holley's
"I only live for today, but I'm one day behind"

Eats Rice and Poops Out Fords.
Reply With Quote
  #6  
Old 04-23-2013, 09:54 AM
1971BB427's Avatar
Second Generation Moderator
Feb 2010 ROTM winner
Jan 2013 ROTM winner
ROTM Winner's Club
1950 Mini sedan
My Garage
 
Join Date: Aug 2008
Location: Portland, Or
Posts: 8,677
iTrader: (0)
Default

Quote:
Originally Posted by jeu510 View Post
ok...i'll try putting in a 180 thermostat and see....what do you guys think running hot is? my old 327 use to run at 180 but now its running at 215-220...i never got it higher than 220 so dont know if it will actually run higher...
If you haven't changed anything, but temps are running higher now, then I'd be looking at tuning. It's easy to adjust timing and make an engine run hotter or cooler.
I think hot is anything over 195 degrees myself. My 327 runs around 180 in cooler weather, and a steady 195 in hot weather idling, or at speed. It's got a tiny 16"x18" two row 3" thick radiator with electric pusher fan. I'd love a little larger radiator and a puller fan, but no room.
Reply With Quote
  #7  
Old 04-23-2013, 10:26 AM
bruce69camaro's Avatar
1st Gear Member
No cars in bruce69camaro's garage, add now
 
Join Date: Jan 2012
Location: PA
Posts: 273
iTrader: (0)
Default

I got a couple questions for you. First how old is your radiator and has it ever been cleaned out by a shop?

Are you running a shroud? You want to try and capture the air and force it through the radiator.

I'm running a Summit Racing aluminum radiator, 2-14" thick, dual rows, 1" tubes with a 16" SPAL fan, that flows 2360 cfm's and I have mounted to a custom shroud that I made.

Now I'm running a big block and a electric water pump and no thermostat, but then again my car is a race car, but I have issues getting my water to warm up if I run my fan.

I had a 68 Camaro with a 327 with a blower and I ran a stock 4 core radiator with a factory shroud, 180F thermostat and used a flex fan. I drove it on the street daily and never had any issues over heating the motor. I used to run 180/190F all day long in all conditions.

After you figure out what is going on with your system, try adding some Wetter Water to your system.
__________________
“So don’t worry about tomorrow, for tomorrow will bring its own worries. Today’s trouble is enough for today."
Reply With Quote
  #8  
Old 07-13-2013, 12:47 PM
In the Staging Lanes
No cars in jeu510's garage, add now
 
Join Date: Sep 2011
Location: sacramento, ca
Posts: 73
iTrader: (0)
Default

Quote:
Originally Posted by bruce69camaro View Post
I got a couple questions for you. First how old is your radiator and has it ever been cleaned out by a shop?

Are you running a shroud? You want to try and capture the air and force it through the radiator.

I'm running a Summit Racing aluminum radiator, 2-14" thick, dual rows, 1" tubes with a 16" SPAL fan, that flows 2360 cfm's and I have mounted to a custom shroud that I made.

Now I'm running a big block and a electric water pump and no thermostat, but then again my car is a race car, but I have issues getting my water to warm up if I run my fan.

I had a 68 Camaro with a 327 with a blower and I ran a stock 4 core radiator with a factory shroud, 180F thermostat and used a flex fan. I drove it on the street daily and never had any issues over heating the motor. I used to run 180/190F all day long in all conditions.

After you figure out what is going on with your system, try adding some Wetter Water to your system.


sorry for the late reply, but the radiator is a new radiator....its a 2row aluminum...i am running a shroud with 2 10" fan....it seems like its the fans thats not putting out enough air flow....im gonna change out the fans and check agian...will update as soon as im done...thanks for inputs..
Reply With Quote
  #9  
Old 07-26-2013, 04:20 PM
In the Staging Lanes
No cars in jeu510's garage, add now
 
Join Date: Sep 2011
Location: sacramento, ca
Posts: 73
iTrader: (0)
Default

ok, so i just put in a new 3 row radiator....it still runs hot....also had another 16" flex a lite fan rated at 3600 cfm installed and still same thing.....you think its my water pump thats not putting out enough flow? i have a new aluminum water pump off ebay....dont know if that is gonna be the problem.....any suggestions? thanks ahead....
Reply With Quote
  #10  
Old 08-02-2013, 09:44 PM
1st Gear Member
No cars in Glenns-67SS's garage, add now
 
Join Date: Jul 2013
Location: Enterprise,Oregon
Posts: 100
iTrader: (0)
Default

Put in the new water pump and check that it isn't to far advanced on the distrutor too!!
__________________
67 SS Camaro coupe (clone) 350 /4speed Bolero Red
02 Dodge diesel
06 Honda Ridgeline
13 Honda ridgeline
96 Lifted Geo Tracker--2 door
Reply With Quote
Old 08-02-2013, 09:44 PM
Activity Stream
Activity Stream: Show All | New Threads | New Posts | New Pictures | Popular Threads | Lonely Threads | Vendor Threads | New Picture Comments | New Profile Comments |
Search:  
 
 
 
Reply

Tags
1969, 327, 383, camaro, chevy, core, fan, flex, geneeration, hot, idle, overheating, racing, radiator, runs, size, stroker

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not 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


Advertising

Featured Sponsors
Vendor Directory
Our Sponsors


All times are GMT -5. The time now is 08:38 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Emails Backup