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#1 |
67cheby
![]() Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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TBI inj computer , does it control turning on and off electric fans ?
i will be running a TBI computer, i am just trying to figure out if i need to buy a seperate controller for my electric fans or does the stock computer turn the fans on and off ? anyone know ?
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#2 |
Registered User
![]() Join Date: Mar 2009
Location: Flint, Mi
Posts: 200
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Re: TBI inj computer , does it control turning on and off electric fans ?
We need more information, Is it a original factory set up with or w/o electric fans or an after market setup?
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#3 |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,151
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Re: TBI inj computer , does it control turning on and off electric fans ?
Pretty sure the F-body ones and B-body ones can. Not sure about the truck ECMs though. You best bet would be to talk to the chip builders/harness makers like Howell, Street and Performance, etc.
__________________
'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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#4 |
Registered User
Join Date: Oct 2010
Location: Largo Florida
Posts: 632
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Re: TBI inj computer , does it control turning on and off electric fans ?
The fans on both any of the TBI's is more of a protections system that does not come on until the engine reaches a temp of 230°. It is seperate from the PCM for the TBI. The operation of the A/C will run the fans, this as well is run on a seperate system from the TBI computer.
It wasn't till much later vehicles that the fan controls were installed in the PCM.
__________________
Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle." |
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#5 |
67cheby
![]() Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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Re: TBI inj computer , does it control turning on and off electric fans ?
406 Q-ship, do you have a suggestion on what system i should run to control my fans ?
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#6 |
67cheby
![]() Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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Re: TBI inj computer , does it control turning on and off electric fans ?
oh and it is a truck ecm, and the wiring harness is aftermarket from (fuelinjectionconnection.com)
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#7 |
86 Scottsdale
Join Date: May 2010
Location: Mooresville NC
Posts: 473
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Re: TBI inj computer , does it control turning on and off electric fans ?
I'd suggest a Spal PWM setup like the one here. They are around $150 or so I think, but they have a ton of cool features.
If running dual fans, you'll also need a fan relay harness. I think you can find it cheaper, but here is the link for comparison's sake. The guys on Chevytalk loved this setup with dual Spal fans in the tri-five Chevys when I was working on my 56. |
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#8 |
67cheby
![]() Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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Re: TBI inj computer , does it control turning on and off electric fans ?
i just snatched one of these up BARGAIN !!! there is 4 left !http://www.ebay.com/itm/Spal-Fan-PWM...sories&vxp=mtr
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#9 |
86 Scottsdale
Join Date: May 2010
Location: Mooresville NC
Posts: 473
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Re: TBI inj computer , does it control turning on and off electric fans ?
Make that 3... damn bargains get me every time.
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#10 |
67cheby
![]() Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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Re: TBI inj computer , does it control turning on and off electric fans ?
Lol ......it's a sickness I understand
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#11 | |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,151
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Re: TBI inj computer , does it control turning on and off electric fans ?
Quote:
__________________
'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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#12 |
Registered User
Join Date: Jan 2003
Location: Safford,AZ
Posts: 3,612
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Re: TBI inj computer , does it control turning on and off electric fans ?
The 7746 ECM used in camaro and firebirds do have the 230*turn on, but we TBI guys know we can use a Grand National rad fan switch that come on at 200*, off at 180*
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#13 |
67cheby
![]() Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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Re: TBI inj computer , does it control turning on and off electric fans ?
i am going to get out my ecm tonight and see which one it is
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#14 |
Registered User
Join Date: Oct 2010
Location: Largo Florida
Posts: 632
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Re: TBI inj computer , does it control turning on and off electric fans ?
Alot of the TPI systems use the same seperate fan controls as the TBI's. As long as the vehicle moves through the air there is a no need for the fans to be running. Even when the fans are controlled by the PCM, they will try to hold the temp between 212-205°. This is for fuel economy and emissions. There are quite a few adjustable tempeture probe that can be spliced into the wiring running to the fan temp switch (this is only on the seperate fan system NOT the PCM controlled style). Don't go nuts on trying to get low engine temps with the fans, it is an old wives tale that an engine runs best at lowest temp possible. Too low of a temp will cost fuel economy and drivability issues. Run a 180° t-stat and turn the fans on at 210° and off at 190°.
__________________
Lifes journey is not to arrive at the gate well preserved, it is to slide in sideways all used up and wore out yelling.....God what'a ride! Where patience fails, force prevails Stapp's Ironical Paradox "The universal aptitude for ineptitude makes any human accomplishment an incredible miracle." |
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#15 | |
Registered User
Join Date: Jan 2011
Location: Chattanooga, TN
Posts: 2,151
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Re: TBI inj computer , does it control turning on and off electric fans ?
Quote:
__________________
'83 K20-TPI '73 C10 '79 C10-ex-diesel(SOLD) '07 Tahoe(Son driving) '14 Suburban-DD '71 C10-current project |
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#16 |
67cheby
![]() Join Date: Sep 2008
Location: siloam springs ar 72761
Posts: 17,890
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Re: TBI inj computer , does it control turning on and off electric fans ?
got the SPAL unit in today
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#17 | |
Parts and more parts
Join Date: Nov 2003
Location: Lebo, Kansas (middle of nowhere
Posts: 6,821
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Re: TBI inj computer , does it control turning on and off electric fans ?
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