I noticed that my temp went to about 225 and I have Mike's aux fan as well as Mike's replacement fan. My SSR usually runs around 210 but last night I noticed when I was stuck in traffic it was around 225 and it was 86 degrees outside. I did not have the A/C turned on. When I reached my destination I checked under the hood and the aux fan running and the other fan was not so I turned the A/C on and the main fan turned on, do I have a bad slow speed relay and if so where is it located and what is the part number?
My SSR: redline red 2004 Supercharged dob 02/05/04 #4944 Kenwood navigation w/XM
Quote:
Originally Posted by harleyrules
I noticed that my temp went to about 225 and I have Mike's aux fan as well as Mike's replacement fan. My SSR usually runs around 210 but last night I noticed when I was stuck in traffic it was around 225 and it was 86 degrees outside. I did not have the A/C turned on. When I reached my destination I checked under the hood and the aux fan running and the other fan was not so I turned the A/C on and the main fan turned on, do I have a bad slow speed relay and if so where is it located and what is the part number?
I would swap out your oem fan for Mike's replacement. The oems will fail sooner or later and his is a perfect slide in fit ! Already did it to mine and I am a HAPPY CAMPER!!!
__________________ SSR DOX WORK LIKE YOU DON'T NEED THE MONEY..LOVE LIKE YOU'VE NEVER BEEN HURT..DANCE LIKE NOBODY IS WATCHING
My SSR: '06 PB #21661 Born 8/29/05, GHL "Old School" True Duals, ADDCO bars, Eibach rear, Joe's Tune
No issues
Quote:
Originally Posted by harleyrules
I noticed that my temp went to about 225 and I have Mike's aux fan as well as Mike's replacement fan. My SSR usually runs around 210 but last night I noticed when I was stuck in traffic it was around 225 and it was 86 degrees outside. I did not have the A/C turned on. When I reached my destination I checked under the hood and the aux fan running and the other fan was not so I turned the A/C on and the main fan turned on, do I have a bad slow speed relay and if so where is it located and what is the part number?
Your system is working just fine.
With the A/C off, your main fan will not turn on until the temperature reaches 226. When it drops to 219, the main fan will turn back off. This is controlled by the computer software......
The Auxiliary fan (~900cfm) only moves about 1/3 the air of the main fan (~3000cfm) and is there to be the first thing to come on....... it will try to take care of the temperature spikes in traffic and usually does a pretty good job. There will be some occasions when the main fan will need to come on to cool you off in traffic..... you can count on it. I would guess that you will never see the need for the main fan to go to high speed in stop and go traffic..... that temperature set point is 235. If it does go there, you can be sure that there will be a boat-load of air pumped through your radiator.... when it gets back down to 226, the main fan will again go to low speed and then to off at 219. The Auxiliary will continue to run this whole time.....augmenting the flow at low speeds.
Please note that when you get to about 30-35mph, there is more than 3000cfm of natural flow through the radiator and you can bet that the temps will drop.....
Hope this helps,
Mike
__________________ Trust and Generosity are contagious.
My SSR: '06 PB #21661 Born 8/29/05, GHL "Old School" True Duals, ADDCO bars, Eibach rear, Joe's Tune
No big deal
The SSR computer has two logic paths that turn on the main cooling fan. One is the coolant temperature... 226= low speed on, 235=high speed on.
The other is the A/C system pressures. After the engine is at operating temperature (185 or above), the comnputer will turn on the main cooling fan to draw air across the A/C condenser in an effort to keep the freon pressures in limits. Typically, "normal" A/C will cause the fan to run at low speed and "recirculate" will cause high speed operation. Both of these are modulated according to the system pressure, but you get the general idea.....
If you are in stop-and-go traffic (A/C off) and your coolant temperature begins to climb past 210.... do the following...
Turn your A/C on and the cabin fan to "1" or "2". Select the air to go to both the main vents and the foot area. This will cause the main cooling fan to come on to keep the A/C system balanced... In turn, you will be moving air across the radiator as well. Makes sense doesn't it.....
This procedure works, regardless of whether you have the OEM fan or my replacement. I don't specifically use it much to keep the engine cool, as I have my A/C on almost all the time.... even with the top down. I use the A/C to keep the footwells cool with the top down..... it's a Phoenix thing.
Regards,
Mike
__________________ Trust and Generosity are contagious.
... I have my A/C on almost all the time.... even with the top down. I use the A/C to keep the footwells cool with the top down..... it's a Phoenix thing.
It's a Maui thing too!
__________________
Laughter is Timeless, Imagination has no age and Dreams are Forever!
My SSR: 2005 No. 18711, born 12/08/04 and adopted 9/07/07
Cooling Fan Operation
Quote:
Originally Posted by Mike in AZ
The SSR computer has two logic paths that turn on the main cooling fan. One is the coolant temperature... 226= low speed on, 235=high speed on.
The other is the A/C system pressures. After the engine is at operating temperature (185 or above), the comnputer will turn on the main cooling fan to draw air across the A/C condenser in an effort to keep the freon pressures in limits. Typically, "normal" A/C will cause the fan to run at low speed and "recirculate" will cause high speed operation. Both of these are modulated according to the system pressure, but you get the general idea.....
If you are in stop-and-go traffic (A/C off) and your coolant temperature begins to climb past 210.... do the following...
Turn your A/C on and the cabin fan to "1" or "2". Select the air to go to both the main vents and the foot area. This will cause the main cooling fan to come on to keep the A/C system balanced... In turn, you will be moving air across the radiator as well. Makes sense doesn't it.....
This procedure works, regardless of whether you have the OEM fan or my replacement. I don't specifically use it much to keep the engine cool, as I have my A/C on almost all the time.... even with the top down. I use the A/C to keep the footwells cool with the top down..... it's a Phoenix thing.
My SSR: '06 PB #21661 Born 8/29/05, GHL "Old School" True Duals, ADDCO bars, Eibach rear, Joe's Tune
Thanks Mike,
I run with the A/C on almost all year here in Phoenix, especially in my Tahoe. Too much volume inside and no "top down" airflow. With that experience, it was sensible for me to always have the A/C on in the SSR... Especially in stop and go traffic. The footwells get pretty hot here and there is so little airflow under the dash that i just leave it on the combination (feet and vents) setting with the fan on "1".
Regards
__________________ Trust and Generosity are contagious.
I run with the A/C on almost all year here in Phoenix, especially in my Tahoe. Too much volume inside and no "top down" airflow. With that experience, it was sensible for me to always have the A/C on in the SSR... Especially in stop and go traffic. The footwells get pretty hot here and there is so little airflow under the dash that i just leave it on the combination (feet and vents) setting with the fan on "1".
Regards
With Winter lows of about 60* in the mornings and Summer highs in the 90's, I run mine on 3-5 Bi-Level all the time. No garage, so it's soaks up the heat when not driving and the seats & feet get hot! I'm waiting for the day I have to make that call to you for a new fan. And with that said.......
No real HWY driving persay, so I'm not loving the 12.5-14 mpg and @ $4.27 per. Hey, good info on the radiator cap vents. I've been scrubbing them out on wash day and just passed the info onto another thread. Thanks!
__________________
Laughter is Timeless, Imagination has no age and Dreams are Forever!
I must have missed that about the radiator cap, what is it??
Take the radiator cap off when the engine is cool and flip it over. You'll see little vents and they clog up w/ hardened Dexcool anti-freeze. If this happens, the radiator hoses will collapse when the engine is shut off. More noticeable on the upper hose under the air intake tube. Mike in AZ explains it in more detail here.
Take the radiator cap off when the engine is cool and flip it over. You'll see little vents and they clog up w/ hardened Dexcool anti-freeze. If this happens, the radiator hoses will collapse when the engine is shut off. More noticeable on the upper hose under the air intake tube. Mike in AZ explains it in more detail here.
SSR DOX WORK LIKE YOU DON'T NEED THE MONEY..LOVE LIKE YOU'VE NEVER BEEN HURT..DANCE LIKE NOBODY IS WATCHING
Be cool!
Hey, good info on the radiator cap vents. I've been scrubbing them out on wash day and just passed the info onto another thread. Thanks!
right back at ya. 
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