ok guys, i have a complete setup from a 86 camaro, as you know that used MAF. I'm swapping to speed density and have an ecm from a 91 corvette. is there anyway i can modify the harness from the 86 to work with the 91 corvette ecm and everything else that comes with the speed density swap?
CK5
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TPI wiring harness
- Thread starter 85 Jimmy
- Start date
yea you can modify it, you will need to get the correct computer plugs and you will need to get a Map sensor and plug, then using ECM pin outs re pin the conectors to match the new computer and add the nessary wires to the harness and delet the ones not used (MAF)
I did the same with my truck -- It isn't half bad so long as you can get an ECM that already has the correct memcal in it and comes with the plugs, and have wiring diagrams for both ECMs.
Head over to thirdgen.org. I believe it's one of the tech articles. (not in the forums) You could probably find a link to that article as well by searching the forums of course too.
1227165 1227730 wiring swap would probably net you the article there.
Ah heck, here it is
: http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/
1227165 1227730 wiring swap would probably net you the article there.
Ah heck, here it is
: http://www.eecis.udel.edu/~davis/z28/ecm_swap_730/the only thing is if you have a ECm form a vette it will be different, they were weather pack computers that went under the hood so there are 4 connectors and the pin outs are different than the 730, i belive you have a 727
www.chevythunder.com also has wiring diagrams for the `165, `730, and `727. I got all the diagrams I used there
pardon my ignorance but why do you not want to use the MAF system?
Mostly because the early TPI MAF systems were made by Bosch, using a quite fragile hot wire. Replacement MAF's are stupid expensive. 
not to mention that MAF systems do not like vibrations anf dirt, not like we see any of that stuff
I gotta disagree with the dirt/durability issue.
Regardless if car or truck, over their lifetime the MAF's see amazing amounts of vibration and potential dust. I've got two stock Bosch MAF sensors from the 80's (of course) that still work, and both are off of, or currently used in a truck application.
IMO MAF durability is not something to be concerned about. COST is what you need to be worried about. They've gotten away from the wire MAF's from what I can tell, the aftermarket Microtek or whatever they are use the thin film setup, which means no wire. They are still over $150 last I heard, it makes more sense to swap to MAP when your MAF fails than to buy another MAF sensor. Again last I checked, MAP's could be had for $50.
I've cleaned my MAF wire with a q-tip and alcohol, the wire isn't THAT fragile, unless you are a gorilla.
Regardless if car or truck, over their lifetime the MAF's see amazing amounts of vibration and potential dust. I've got two stock Bosch MAF sensors from the 80's (of course) that still work, and both are off of, or currently used in a truck application.
IMO MAF durability is not something to be concerned about. COST is what you need to be worried about. They've gotten away from the wire MAF's from what I can tell, the aftermarket Microtek or whatever they are use the thin film setup, which means no wire. They are still over $150 last I heard, it makes more sense to swap to MAP when your MAF fails than to buy another MAF sensor. Again last I checked, MAP's could be had for $50.
I've cleaned my MAF wire with a q-tip and alcohol, the wire isn't THAT fragile, unless you are a gorilla.
Routing is of course another issue, MAF certainly loses on that one as well.
I assume you are going electric fans with this setup, I don't believe a filter off the TB will clear the stock clutch fan.
I assume you are going electric fans with this setup, I don't believe a filter off the TB will clear the stock clutch fan.
