Corvettes and Holley ECU's
08-02-2017, 03:32 PM
#1
Corvettes and Holley ECU's Sooooo i picked up a nice 02' C5Z for cheap and im considering going full retard. I've been reading on the vette forums about integrating it and im getting mixed responses about whether factory options can be kept. I don't care about traction control but id pretty much like to keep everything else. Anyone here have any first hand experience?
Last edited by oscs; 08-02-2017 at 03:50 PM.
08-02-2017, 04:47 PM
#2
im curious to know as well.. im assuming its possible but a wiring headache piggy backing one system to another, one thing you will def have to do is bumper exit though
08-02-2017, 05:14 PM
#3
10 Second Club
iTrader: (8)
Piggybacking a holley onto the OEM pcm has been done quite a bit. While it's not necessarily hard, it does take patience.
I've not done it but a friend has done a couple of them. You get to keep most everything, as the Holley runs the engine, the pcm/bcm controls the car.
Have fun with your new project!
I've not done it but a friend has done a couple of them. You get to keep most everything, as the Holley runs the engine, the pcm/bcm controls the car.
Have fun with your new project!
08-09-2017, 01:04 PM
#5
Piggybacking a holley onto the OEM pcm has been done quite a bit. While it's not necessarily hard, it does take patience.
I've not done it but a friend has done a couple of them. You get to keep most everything, as the Holley runs the engine, the pcm/bcm controls the car.
Have fun with your new project!
I've not done it but a friend has done a couple of them. You get to keep most everything, as the Holley runs the engine, the pcm/bcm controls the car.
Have fun with your new project!
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08-10-2017, 05:50 PM
#11
9 Second Club
So OEM ecu will still need to run the throttle and as much as possible as it did before with all wiring remaining intact. So you will end up tuning on two fronts to a certain degree both the OEM ecu and Holley.
Many sensors can be shared...2 wire sensors like air temp, coolant temp cannot be shared unless you can turn off any internal pullups within the Holley...which is probably very unlikely.
Either way, safest to run a sensor for each ecu.
Likes of crank, cam, MAP etc, 3 wire powered sensors, there should be no issue sharing the same signal with both ecus
If doing a piggyback, it can be handy to try and source a male/female connector set for the ecu, so you can actually make a patch harness to just plug in, rather than starting to cut factory wiring. Makes stuff a bit easier and neater to change, especially if you wanted to go back to the OEM stuff without leaving a mess behind.
08-18-2017, 01:53 PM
#16
Not sure what he used but these made my life much easier for wiring the power windows.
http://www.watsons-streetworks.com/p...versing-module
http://www.watsons-streetworks.com/p...versing-module
09-01-2017, 08:13 AM
#19
You can have traction control setup through the Holley. I run it on my dominator. The only reason I'd piggyback a factory harness would be to try to get through emissions. Pain in the *** and that's why I didn't do it on my wife's 01ss. Holley can see about anything you want it to see and control. Dominator has tons of input outputs. So if you want to keep a/c no problem Holley can adjust for a/c.
09-03-2017, 12:42 AM
#20
You can have traction control setup through the Holley. I run it on my dominator. The only reason I'd piggyback a factory harness would be to try to get through emissions. Pain in the *** and that's why I didn't do it on my wife's 01ss. Holley can see about anything you want it to see and control. Dominator has tons of input outputs. So if you want to keep a/c no problem Holley can adjust for a/c.