LS1 Fans question
Thread Starter
Teching In
Joined: Jul 2005
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LS1 Fans question I just recently purchased some ls1 fans off a 2002 trans am. The only things, were would i be able to find the connectors to the fans for power. If any one knows what im talking about , please let me know, need to put these fans in quick my current e fan is going out, any help would be apreciated. Just curious to find out where i can get those connectors.
Thread Starter
Teching In
Joined: Jul 2005
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Im sorry if im confusing anyone, but its the connectors that go to the fans, right underneath them, really dont need the relays and what not, cuz im gonna us the current setup i have with my efan i have right now,by the way these are going on an s10.
Staging Lane
Joined: Dec 2003
Posts: 90
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From: Phoenix
Here's four suggestions-
A GM dealer will sometimes have 'service' parts for the harness. I've bought other connectors for GM harnesses this way. The connector comes in a bag with pigtails to wire into the harness.
One of the board's sponsors, Nelson Performance, makes a harness for the LS1 fan. Perhaps he'd sell you the connectors your looking for or tell you the part number.
If you have any junkyards nearby, find a V6 or V8 camaro '98 up and they should be willing to clip those connectors out of the harness.
Waytek Wiring sells the Packard-type connectors, shells and pins. They have a .pdf catalog on the web at http://waytekwire.com/. They have a minumun order, but lots of interesting stuff.
Good luck........
A GM dealer will sometimes have 'service' parts for the harness. I've bought other connectors for GM harnesses this way. The connector comes in a bag with pigtails to wire into the harness.
One of the board's sponsors, Nelson Performance, makes a harness for the LS1 fan. Perhaps he'd sell you the connectors your looking for or tell you the part number.
If you have any junkyards nearby, find a V6 or V8 camaro '98 up and they should be willing to clip those connectors out of the harness.
Waytek Wiring sells the Packard-type connectors, shells and pins. They have a .pdf catalog on the web at http://waytekwire.com/. They have a minumun order, but lots of interesting stuff.
Good luck........
Teching In
Joined: Jul 2005
Posts: 21
Likes: 0
I used a SPAL fan in my conversion, which came with all the harness, sender and wiring needed to drop it in. This might be easier than trying to adapt the trans am fan, and I believe the SPAL fan (16,000 cfm?) moved a lot more air than an OEM application.
Staging Lane
Joined: Dec 2003
Posts: 90
Likes: 0
From: Phoenix
I have the SPAL fans on one of my cars and they work well, but building a shroud for them was a PITA. They only run at one speed - high,
The LS1 fans obviously cooled an LS1 in the donor car, so if the radiator is big enough it should work in the S10.
CFM for the LS1 fans probably isn't an issue because they run at half power (fan motors wired in series) unless the airconditioner is on, then they switch to high (fan motors in parallel) so the condenser will cool.
Once you get the connectors for the fan, are you going to have the computer swiitch it on and off using the multi-speed relays from the LS1 donor car?
The LS1 fans obviously cooled an LS1 in the donor car, so if the radiator is big enough it should work in the S10.
CFM for the LS1 fans probably isn't an issue because they run at half power (fan motors wired in series) unless the airconditioner is on, then they switch to high (fan motors in parallel) so the condenser will cool.
Once you get the connectors for the fan, are you going to have the computer swiitch it on and off using the multi-speed relays from the LS1 donor car?
Thread Starter
Teching In
Joined: Jul 2005
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Well I currenlty have a Flex-a-flight on my truck right now. It is controlled by a temp switch box, and by an a/c switch, i can adjust the temp box, so in other words, to when ever i want, just a matter of turning a ***. The fan will stay on even if the truck is off, and cool to the set temp. The ls1 fans will cool the truck great, plenty of s10 guys use them on the v6's. But now i have a quick question about the fans, do they have more than one speed? My plan was just use my existing setup right now, just basically replacing fans if u know what i mean, making the ls1 fans run at the same time, like one. If some one would please let me know if this will work, cuz if not then I would need to get the whole relay setup.
Teching In
Joined: Jul 2005
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Originally Posted by LS1Sandrail
I have the SPAL fans on one of my cars and they work well, but building a shroud for them was a PITA. They only run at one speed - high,
However, for my application, I needed to be moving the max amount of air due to mostly slow speeds that I am driving (rockcrawling at walking speed). I also wanted the SPAL fan because of the curved blades that would take it easier on my radiator upon impact when I flop the thing on its side, or worse.... so a low noise fan was not at the top of my priorities.
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Staging Lane
Joined: Dec 2003
Posts: 90
Likes: 0
From: Phoenix
The LS1 fans have a low and high speed. The factory relays switch from series (6V across each motor) and parallel (12V across the motor).
I believe the fans draw about 15-20 amps each at 12V, so both running on high speed are noisy and suck up a fair amount of your alternator's capacity (105 amp, I presume)
(If somebody knows better, please correct me)
Only the low speed is required to cool the engine, but to cool the motor and the condenser, the fans run on high.
If you run the fans on high all the time you defeat some of their HP benefit and can load up your alternator.
If you run the fans on low with the AC on you can build pressure in the AC that isn't good.
To use the factory fans you should either use the factory relay pack and PCM (which turns the fans on at 205F by the way) or have your PCM reprogrammed and use a Nelson harness/relay to run the fans at low/high speed.
Hope this helps you out some.
I believe the fans draw about 15-20 amps each at 12V, so both running on high speed are noisy and suck up a fair amount of your alternator's capacity (105 amp, I presume)
(If somebody knows better, please correct me)
Only the low speed is required to cool the engine, but to cool the motor and the condenser, the fans run on high.
If you run the fans on high all the time you defeat some of their HP benefit and can load up your alternator.
If you run the fans on low with the AC on you can build pressure in the AC that isn't good.
To use the factory fans you should either use the factory relay pack and PCM (which turns the fans on at 205F by the way) or have your PCM reprogrammed and use a Nelson harness/relay to run the fans at low/high speed.
Hope this helps you out some.
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Teching In
Joined: Jul 2005
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Hey all I have to say is thanks alot guys, really apreciate your help and info, for the mean time I think Im just gonna hook them up on high, cuz it hots down here in Tx, so i need all the help i can get, and not to much worried about draining the alternator, I think it will hold up, but i really do apreciate yahs info. Shows me this forum is a mature and older group of guys, who are not right away bashing at any little thing i say. Thanks alot once again, Ill repost to to keep yah up to date.
P.S. you guys with ls1, watch out for this lil truck, it will turn some heads...
take it easy guys.
P.S. you guys with ls1, watch out for this lil truck, it will turn some heads...
take it easy guys. Staging Lane
Joined: Dec 2003
Posts: 90
Likes: 0
From: Phoenix
If you go down a little further to the truck forum, there is a lot of information on the LS1 fan install. It is a popular modification they say is worth about 10-15HP for the 4.8 to 6.0L trucks
I'm getting ready to do my truck and am curious to see how it works out. I'm in Phoenix and it is really hot, but the guy in Texas who sold me the harness said he's got lots of customers in Texas and it works well.
Let us know how it works out..
Phil
I'm getting ready to do my truck and am curious to see how it works out. I'm in Phoenix and it is really hot, but the guy in Texas who sold me the harness said he's got lots of customers in Texas and it works well.
Let us know how it works out..
Phil
TECH Resident
Joined: May 2004
Posts: 792
Likes: 2
From: SoCal
Originally Posted by LS1Sandrail
The LS1 fans have a low and high speed. The factory relays switch from series (6V across each motor) and parallel (12V across the motor).
I believe the fans draw about 15-20 amps each at 12V, so both running on high speed are noisy and suck up a fair amount of your alternator's capacity (105 amp, I presume)
(If somebody knows better, please correct me)
Only the low speed is required to cool the engine, but to cool the motor and the condenser, the fans run on high.
If you run the fans on high all the time you defeat some of their HP benefit and can load up your alternator.
If you run the fans on low with the AC on you can build pressure in the AC that isn't good.
To use the factory fans you should either use the factory relay pack and PCM (which turns the fans on at 205F by the way) or have your PCM reprogrammed and use a Nelson harness/relay to run the fans at low/high speed.
Hope this helps you out some.
I believe the fans draw about 15-20 amps each at 12V, so both running on high speed are noisy and suck up a fair amount of your alternator's capacity (105 amp, I presume)
(If somebody knows better, please correct me)
Only the low speed is required to cool the engine, but to cool the motor and the condenser, the fans run on high.
If you run the fans on high all the time you defeat some of their HP benefit and can load up your alternator.
If you run the fans on low with the AC on you can build pressure in the AC that isn't good.
To use the factory fans you should either use the factory relay pack and PCM (which turns the fans on at 205F by the way) or have your PCM reprogrammed and use a Nelson harness/relay to run the fans at low/high speed.
Hope this helps you out some.
Thanks,
Andy1
TECH Resident
Joined: Jun 2004
Posts: 841
Likes: 2
From: Tampa, FL
http://currentperformance.com/Connec...onnectors.html
5th connector down is the one for the LS1 E-fans.
5th connector down is the one for the LS1 E-fans.
