Could anyone enlighten me as to the function and operation of the "what appears to be" blower motor in the right side fenderwell of the trunk. Thank you in advance
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11:16 AM
PFF
System Bot
gushotrod Member
Posts: 40 From: Eugene, OR, USA Registered: May 2004
It is a blower for cooling the coil and alternator... if you look in the engine compartment you should see two ducts that are pointed at those two items...
the trunk blower - blows cool air onto the alternator and the coilpack to keep the electonics from burning up prematurely -- the theory is sound but the application lacking since the fan only turns on when the radiator fan turns on, meaning you are up at 220*
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11:25 AM
Captain Carl Junior Member
Posts: 5 From: Glendale, AZ USA Registered: Aug 2005
A Turbo? It has plastic duckwork that runs across the inside of the trunk and exits into the engine compartment. There is nothing attached to the outlet in the engine compartment. Wouldn't a turbo be attached to the exhaust in some fashion?
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11:29 AM
Captain Carl Junior Member
Posts: 5 From: Glendale, AZ USA Registered: Aug 2005
the trunk blower - blows cool air onto the alternator and the coilpack to keep the electonics from burning up prematurely -- the theory is sound but the application lacking since the fan only turns on when the radiator fan turns on, meaning you are up at 220*
Which is why they dumped it in 88 in favor of a better head shield on the alternator.
the trunk blower - blows cool air onto the alternator and the coilpack to keep the electonics from burning up prematurely -- the theory is sound but the application lacking since the fan only turns on when the radiator fan turns on, meaning you are up at 220*
And also when the AC is on.
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01:59 PM
Spoon Member
Posts: 3762 From: Sadsburyville, PA. 19369 / USA Registered: May 2004
It is a blower for cooling the coil and alternator... if you look in the engine compartment you should see two ducts that are pointed at those two items...
Do those 2 DUCKS need to be feed every so often???
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08:32 PM
Spoon Member
Posts: 3762 From: Sadsburyville, PA. 19369 / USA Registered: May 2004
the trunk blower - blows cool air onto the alternator and the coilpack to keep the electonics from burning up prematurely -- the theory is sound but the application lacking since the fan only turns on when the radiator fan turns on, meaning you are up at 220*
Somebody on the forum had a modification kit that turned on that blower based on engine compartment temperature, not radiator fan operation. I bought the kit but never put it on yet. Think it was a miniture thermostat you mount in the engine comp and this got wired into the blower somehow. May someone else can chime in.
Anybody got a pic of the '88 alternator heat shield?
I'd like to fabricate one.
I don't think it was as much a heat shield as it was they changed from an SI series alternator to a CS series alternator which has an extra internal fan in it.
A Turbo? It has plastic duckwork that runs across the inside of the trunk and exits into the engine compartment. There is nothing attached to the outlet in the engine compartment. Wouldn't a turbo be attached to the exhaust in some fashion?
...................................................................... i hope you realize he was joking
I don't think it was as much a heat shield as it was they changed from an SI series alternator to a CS series alternator which has an extra internal fan in it.
max
Do you mean there was no heat shield, or that it was not well designed?
Arn
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10:13 AM
Captain Carl Junior Member
Posts: 5 From: Glendale, AZ USA Registered: Aug 2005
Yes, I knew he was joking about the turbo. This is my first Fiero, and I knew it related to cooling but, I was not sure of the operation or logic. It doesn't seem to have the capacity to provide much of a cooling effect in such a high temp area.
Thank you again gentelmen.
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10:16 AM
Techbot Member
Posts: 425 From: Pasadena, TX Registered: Feb 2004
Hot wire it. You might as well. I don't know exactly how much benefit I've seen from hot wiring mine but I figure it's better always on than usually off.
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11:41 PM
Fastback 86 Member
Posts: 7849 From: Los Angeles, CA Registered: Sep 2003
Do you mean there was no heat shield, or that it was not well designed?
Arn
Neither. On the pre-88s, the headshild is bolted to the old style alternator, which allows for transfer of heat through the contact. On the 88s, the heatshield is a curved piece that is bolted to the block by 4 of the bolts that hold the exhaust manifold on. This way, its not in contact with the alt and better shields it. Additionally, they went to the better alternator.
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11:45 PM
Fastback 86 Member
Posts: 7849 From: Los Angeles, CA Registered: Sep 2003
Anyone ever put one of the rear trunk fans into an 84?
Eric
You could do it, but its a lot of work for little gain. The alt and coil are not in the same place on a 4cyl, so the cooling tubes wouldn't point at anything they were supposed to. In addition to making new cooling tubes, you'd also need to cut the holes for them to go through, get the V6 trunk carpet, and figure out how to wire in the relay and power for the fan.
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11:47 PM
PFF
System Bot
Fastback 86 Member
Posts: 7849 From: Los Angeles, CA Registered: Sep 2003
Thanks to another member I did this mod and it works perfectly. This will allow the blower to be on when ever the engine is running. The front fan will come on and off as regulated by the sensor.
To do the rear modification do the following
Open rear trunk and pull back carpet on right side. you will see a relay held on by two 7mm bolts, undo these remove the wiring by pushing on the connector to release the relay from the wiring in your hand will be 3 brown wires, a green/white and a black red. the 3 brown appear to go 2 to one connector and 1 to another. if you peel the tape back you will see the brown wires connect each other together you now wand to peel some insulation back on any brown wire and do the same on the black red wire with a 4-5 inch piece of wire connect the brown wire to the black/red wire, tape all connections retape the bundle of wire back together plug in relay and screw two 7mm bolts back in now when ever the ignition is running the blower will be cooling the alternator and coil/distributor/ignition module when the temperature gets hot as previous the front fan will cycle on and off as needed
I was amazed at actually how much air this little blower produces to cool these electronic items.
Tim
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11:51 AM
Fastback 86 Member
Posts: 7849 From: Los Angeles, CA Registered: Sep 2003
Fastback, did the smog people give you any grief about the truelo intake manifold ?
They haven't seen it yet. I'm going to try to go to a test only station when the time comes and see if I can slip it past the min. wage tech that got stuck doing smogs. Odds are he/she won't know jack about Fieros and may not realize its not stock. If I can't sneak it past, I have the upper and middle plenums so I'll just swap it back long enough to smog it.
