8746 vs 7747
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Joined: Oct 1999
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Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
8746 vs 7747
Is it true that you can program the limp home mode eprom in the 7747 and not the 8746?
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, Jon (350 TBI!)
91 Red My website
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, Jon (350 TBI!)
91 Red My website
The limp home chip in the 7747 is not programable. It is a resistor network. There are different chips (calpaks) for the differnt size engines the 7747 was used on.
The one in the 8746 is soldered to the board I believe.
The one in the 8746 is soldered to the board I believe.
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Joined: Jun 2000
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From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
<font face="Verdana, Arial" size="2">Originally posted by Brent:
The limp home chip in the 7747 is not programable. It is a resistor network. There are different chips (calpaks) for the differnt size engines the 7747 was used on.
The one in the 8746 is soldered to the board I believe. </font>
The limp home chip in the 7747 is not programable. It is a resistor network. There are different chips (calpaks) for the differnt size engines the 7747 was used on.
The one in the 8746 is soldered to the board I believe. </font>
Thread Starter
Senior Member
Joined: Oct 1999
Posts: 6,621
Likes: 2
Car: 91 Red Sled
Axle/Gears: 10bolt Richmond 3.73 Torsen
We couldn't even keep Tim's (njspeeder) car at an idle when his ecm got messed up. A pin was bent out of place from an hack eprom install in the dark!
------------------
, Jon (350 TBI!)
91 Red My website
------------------
, Jon (350 TBI!)
91 Red My website
Supreme Member
Joined: Jun 2000
Posts: 7,554
Likes: 1
From: In reality
Car: An Ol Buick
Engine: Vsick
Transmission: Janis Tranny Yank Converter
<font face="Verdana, Arial" size="2">Originally posted by Brent:
I assume those two would be V6 and V8. That makes me think the limp home cal for the 747 is fairly rough. Seeing how the same calpak is used for the 305, 350 and 454 apparently.</font>
I assume those two would be V6 and V8. That makes me think the limp home cal for the 747 is fairly rough. Seeing how the same calpak is used for the 305, 350 and 454 apparently.</font>
747 was a first generation computer so it's a no bells or whistles item..
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