XJS ( X27 ) 1975 - 1996 3.6 4.0 5.3 6.0

My auxiliary fans....drawing too much ??

Thread Tools
 
Search this Thread
 
  #1  
Old 10-31-2014 | 09:09 AM
Spikepaga's Avatar
Thread Starter
|
Veteran Member
Joined: Apr 2011
Posts: 2,986
Likes: 559
From: Houston, Texas
Default My auxiliary fans....drawing too much ??

Hello guys,

This post is about my 95 which comes stock with the auxiliary pusher fan placed on the right , in front of the condenser.

When that stock aux fan died, I replaced it with 2 small pusher fans using the same stock wiring harness, one fan I placed where the stock used to be (right front of condenser) and I fitted the second one to its left since there is plenty of space.

The one that replaced the stock aux was a nine inch high performance paddle SPAL fan that pushed 767 CMF and pulled 10.5 amps: A1 Electric Online Store: Spal 30102053 9" High Performance Fan (Push)

To its left I added a 09 inch low profile SPAL fan that pushes 590 CFM and pulls 6.5 amps : A1 Electric Online Store: Spal 30100381 9" Fan (Push)

So total I was drawing 16 amps.

Now I have replaced the 09 inch high performance fan with a 11 inch high performance fan, same brand. This one pushes 1363 CFM, a lot more air, but it pulls 18 amps. Almost twice as the one it replaced. A1 Electric Online Store: Spal 30102040 11" High Performance Fan (Push)

The other fan remained, So total now, I am drawing close to 30 amps. My A/C seems to like the extra airflow a lot. But now I am concerned that I am pulling too much power. I also wired the fans to come on with the compressor, so they both run with the A/C.

Question:

Is that pulling too much for the car to handle?

Does anyone know what the stock aux fan pulled?

Thanks!
 
  #2  
Old 10-31-2014 | 12:32 PM
Greg in France's Avatar
Veteran Member
Joined: Jan 2012
Posts: 13,632
Likes: 9,478
From: France
Default

If you have a 115 amp alternator, it can handle the current fine. The OEM wiring may be a bit stressed though. Just make sure the feed cable for the fans is robust enough if it is the OEM wiring. If it gets hot after 10 mins of continuous running, then that is a warning. If it is a bit iffy, you can always run a new feed cable to a new relay for the fan feed directly from the battery post on the bulkhead, and use the OEM circuit to switch on the relay.

Greg
 
The following users liked this post:
Spikepaga (11-03-2014)
  #3  
Old 10-31-2014 | 02:52 PM
Japthug's Avatar
Senior Member
Joined: Jan 2011
Posts: 424
Likes: 210
From: Japan
Default

Your car has 120amp alternator, so if it isn't a hot night where you need full AC and the headlights it will be okay.
But in that case, when you are in a traffic jam it will a big load.

I suggest you re-wire the harness with more thick ones, as Greg says. I don't think the stock wire is thick enough, when it isn't you can't draw the maximum power from the fan.
 
The following users liked this post:
Spikepaga (11-03-2014)
  #4  
Old 11-03-2014 | 01:26 PM
Spikepaga's Avatar
Thread Starter
|
Veteran Member
Joined: Apr 2011
Posts: 2,986
Likes: 559
From: Houston, Texas
Default

Originally Posted by Japthug
Your car has 120amp alternator, so if it isn't a hot night where you need full AC and the headlights it will be okay.
But in that case, when you are in a traffic jam it will a big load.

I suggest you re-wire the harness with more thick ones, as Greg says. I don't think the stock wire is thick enough, when it isn't you can't draw the maximum power from the fan.
Thanks for your reply. The cables aren't getting hot after 30 minutes of driving, but a situation with A/C on, fans on, and headlights on are a real possibility.

What did you mean that I can't draw the maximum power from the fan?

Thanks!!
 
  #5  
Old 11-04-2014 | 08:35 AM
Japthug's Avatar
Senior Member
Joined: Jan 2011
Posts: 424
Likes: 210
From: Japan
Default

I mean if the wire is too narrow, it could be a resistance and there would be a current loss.
But unless the wire doesn't get hot it would be alright

I forgot to mention, when you put a pusher electric fan in front of the mechanical puller fan, it could sometimes be a resistance of the original fan.
It is because the original fan is much stronger than most of electric fans, so electric fans can't be a help in some situations, sometimes it rather prevent the air flow.
So there might not be need to put another electric fan.
It really depends on the situation though.
 
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Doug S
XJS ( X27 )
15
02-13-2024 03:24 AM
kurtomatic
XJS ( X27 )
4
09-26-2015 10:31 PM
explorer364
New Member Area - Intro a MUST
9
09-14-2015 07:43 PM
explorer364
XJS ( X27 )
3
09-11-2015 05:44 PM

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 


Quick Reply: My auxiliary fans....drawing too much ??



All times are GMT -5. The time now is 10:06 PM.