running hot at stop lights and heavy traffic - Alfa Romeo Bulletin Board & Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 18 (permalink) Old 06-30-2019, 05:22 AM Thread Starter
Junior Member
Gold Subscriber
 
Join Date: Apr 2019
Posts: 9
running hot at stop lights and heavy traffic

I have a not so stock "89" spider.It has 11.1 cams, high comp.pistons 10:5,dual webers,and magna flow headers and exhaust.I use a Euro cold air box on the intake,and I also have a new radiator and thermostat.
My problem is, now that the weather is getting hot,it runs hot about 210 degrees or so at stop signs and heavy traffic.does anyone else have this problem?
builder69 is offline  
Sponsored Links
Advertisement
 
post #2 of 18 (permalink) Old 06-30-2019, 05:35 AM
Moderator
Platinum SubscriberModerator
 
Alfajay's Avatar
 
Join Date: Jan 2005
Location: San Juan Capistrano
Posts: 9,842
Quote:
Originally Posted by builder69 View Post
it runs hot about 210 degrees or so at stop signs and heavy traffic
You didn't tell us anything about your fan; is it electric or belt-driven? If electric, are you sure it's coming on? If belt-driven, is the shroud still installed?

Generally the symptoms you describe - cooling OK at speed but running hot when stopped - are symptoms of not enough fan-driven airflow through the radiator. An engine's fan is primarily there to cool the radiator while the car is stopped.

Jay Mackro
San Juan Capistrano, CA

'65 Guilia Sprint GT
'67 Duetto
'91 164L
Alfajay is online now  
post #3 of 18 (permalink) Old 06-30-2019, 06:08 AM
Senior Member
Platinum Subscriber
 
alfaparticle's Avatar
 
Join Date: Oct 2004
Location: Columbia SC
Posts: 12,960
When you increase the power of the engine you also increase the heat output. I tried a good quality SPAL fan on a stock radiator before I switched to a Wes Ingram cross flow aluminum radiator with built in oil cooler. I posted the details. The oil cooler made a difference.

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
alfaparticle is online now  
Sponsored Links
Advertisement
 
post #4 of 18 (permalink) Old 06-30-2019, 06:50 AM Thread Starter
Junior Member
Gold Subscriber
 
Join Date: Apr 2019
Posts: 9
Thanks for the reply I have two electric fans,one was used for the AC that I did away with,so I wired the two fans together and now both fans come on at the same time,and they are both working perfectly.You would think that would make a big difference.
I like the Idea of using a new radiator with an oil cooler I bet that will make a difference.I will look into that Thanks Ed.
builder69 is offline  
post #5 of 18 (permalink) Old 07-02-2019, 08:16 AM
Registered User
Platinum Subscriber
 
Andrew's Avatar
 
Join Date: Mar 2004
Location: Berkeley, CA
Posts: 21,045
Where are you and what's the ambient temp there? And what thermostat do you have?
I would think sitting at stop lights, even a strong motor is not making that much more heat than a stock on, idling. Just my sense of it.
Which fan do you have? There are various with different size blades. The thin Euro fan draws less air than the US-market one.
Andrew
Andrew is online now  
post #6 of 18 (permalink) Old 07-18-2019, 09:24 PM
Registered User
 
slowcreek's Avatar
 
Join Date: Jul 2005
Location: Prescott, Az
Posts: 1,070
Garage
How are you measuring the temp?

Stock gauge? Stock sender? They vary alot.

It's Giuseppe's giubos, not Guido's guibos, on my 78 Spider and Sport Sedan
REFRESH CONNECTIONS BEFORE REPLACING COMPONENTS
slowcreek is online now  
post #7 of 18 (permalink) Old 07-19-2019, 03:07 AM Thread Starter
Junior Member
Gold Subscriber
 
Join Date: Apr 2019
Posts: 9
I am using the stock gauge and sending unit.My friend has a thermal reader that you point ,squeeze the trigger and get an instant temperature reading.I will use that this weekend.
builder69 is offline  
post #8 of 18 (permalink) Old 07-19-2019, 06:45 AM
Darth Moderator
Platinum SubscriberModerator
 
AlfistiSA's Avatar
 
Join Date: Nov 2003
Location: Port Elizabeth, South Africa
Posts: 3,412
Just check that the fans each rotate in the correct direction, not sure if it's possible to get a reverse action when wiring one into another, but if the AC one is supposed to push from the front and it's running backwards acting as a puller it will prevent air from entering the radiator.....

Easy & cheap to check

Aye
Greig

Some 750's
Some 101's
Some 105's
Some others
AlfistiSA is offline  
post #9 of 18 (permalink) Old 07-20-2019, 12:56 PM Thread Starter
Junior Member
Gold Subscriber
 
Join Date: Apr 2019
Posts: 9
thanks for the advise ,I never thought of thatI will check that tomorrow.
builder69 is offline  
post #10 of 18 (permalink) Old 07-20-2019, 02:37 PM
Registered User
 
Tom Frasca's Avatar
 
Join Date: Dec 2016
Location: New York
Posts: 1,753
Garage
if fans okay..protect the engine investment put a radiator designed for race engine.. cheap in the long run

The older I get.. the faster I was....
Tom
Tom Frasca is offline  
post #11 of 18 (permalink) Old 07-20-2019, 05:45 PM
Senior Member
Platinum Subscriber
 
alfaparticle's Avatar
 
Join Date: Oct 2004
Location: Columbia SC
Posts: 12,960
Quote:
if fans okay..protect the engine investment put a radiator designed for race engine.. cheap in the long run
+1

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
alfaparticle is online now  
post #12 of 18 (permalink) Old 07-20-2019, 09:13 PM
Registered User
 
Join Date: Mar 2007
Location: San Antonio, Texas
Posts: 4,114
I have a built Alfa motor that's pretty close to what your are running. I had the same problem with a stock radiator. I cured the problem by have a good radiator shop re-core my stock radiator making a 3 core instead of a 2 core. I run two 8in pusher fans with a stock threaded thermostat. My hot-rod motor now stays cool even in 100 degree stop and go traffic.

Having your radiator re-cored dramatically increases it's cooling capacity. Since the shop simply modified my existing radiator, mounting it wasn't a problem. The extra thickness, however, made it hard to mount my preferred 10in pusher electric fan. Most radiator shops (if you can find an old-school traditional one) will do a re-core for less money than an aluminum race-radiator. The only drawback is that re-cored radiators lack the street-cred of aluminum radiators.

Before you start doing anything major, check your teps with your friend's external tester. When I did that I found that my temp gauge was reading high.

Jim . . . '72 Super 1300, '70, 1750GTV, 2nd series,
'62, Lancia Flaminia Zagato3c, 2nd series
180OUT is offline  
post #13 of 18 (permalink) Old 07-21-2019, 04:56 AM Thread Starter
Junior Member
Gold Subscriber
 
Join Date: Apr 2019
Posts: 9
Thanks for the info.I was thinking about going with one of Wess Ingrams aluminum radiators with the built in oil cooler you can run a 10 inch push fan on the front of the radiator But you might be required to do some slight modification,at least that's what he says on his web site.
I like the thought of having mine recored but I will have to do some searching in my area to find a shop capable of the project.Thanks I like your idea.
And yes my Alfa's temp was reading about 5 degrees hotter than what the gauge reads.
builder69 is offline  
post #14 of 18 (permalink) Old 07-21-2019, 05:22 AM
Senior Member
Platinum Subscriber
 
alfaparticle's Avatar
 
Join Date: Oct 2004
Location: Columbia SC
Posts: 12,960
I have a 12" pusher fan on my Wes Ingram radiator and I did not have to make big changes to get it in. The only downside is finding a suitable top hose for a Spider. Conedriver found one in a very helpful auto parts store. I used a piece of wire reinforced, general purpose flexible hose. I can post a picture if you decide to go that way. Maybe my 190 HP motor is generating more heat than most. Connecting up the oil cooler made a big difference.

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
alfaparticle is online now  
post #15 of 18 (permalink) Old 07-21-2019, 06:01 AM
Senior Member
Platinum Subscriber
 
alfaparticle's Avatar
 
Join Date: Oct 2004
Location: Columbia SC
Posts: 12,960
Pictures of Wes Ingram radiator installation

Pictures of Wes Ingram radiator installation
Attached Images
    

Ed Prytherch
79 Spider
76 Suzuki GT500
2011 Jaguar XKR

A little government and a little luck are necessary in life, but only a fool trusts either of them. - P.J. O'Rourke
alfaparticle is online now  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user 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:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



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 Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome