it's same car, just at different stages

 

Quick little update. I took awhile to decide where I wanted to mount the Holley. This was very difficult to make the decision as I saw many good options, but somehow I didn't quite care for them in some aspect. So I decided to pull the dash and remove the airbag.




The Terminator fits great here but the problem now is the hole in the dash. So I started modeling a mount for the ECU that will incorporate mounts/latches to retain the factory dash panel "corvette" insert. This will use push to open latches to hold it in place and if access to the ECU is needed, then simply push the panel and the latches will undo (same concept as the magnet latches on a stereo system glass door).

Here are a couple screen shots of the mount so far. I will make the plate out of 1/8" aluminum, along with the brackets for the latches.





The next hurdle would be where to pass the harness through the firewall. Obviously many have used the factory large grommet on the lower passenger side. I just did not want to open it up more to shove more through it. I was informed about the aluminum billet pass through piece that sharpe performance sells.. It is a very nice piece as shown below... Now, where to put it?



My thought was to mount it high above the factory grommet location which would be into the wiper cowl, and then it would have to pass through the outside cowl into the engine bay where I would use the sharpe passthrough. I got the piece and thought more on it, realized that the factory harness fuse block insert and the other odd connectors on that trunk would fit through the sharpe piece just fine. So I removed the large grommet completely, opened the hole just a bit vertically so the sharpe piece would insert through it and then mounted it last night. My plan is the run the main holley harness through the large hole, and the factory harness section through the smaller hole. I will then find another section of firewall to put a seals it style grommet in and run the dbw harness through it.

 

Here are a couple pics of the new ecu mount. Remaking the brackets for the push latches as the corvette dash panel was about an inch too far in and an inch down from where it needs to be. It also has the ability to rock forward and back which will either be fixed with the new brackets pushing it tight against the dash pad, or by adding one more bracket in the center, lower than the other two to prohibit the rocking motion. Overall I am very pleased with this though.

 

She's a beaut, Clark!

 

Had the shop remake the brackets with an offset of 1" up and 1" forward (A^2 +b^2 = c^2...... C = 1.4142 diagonally up)

I see where the first brackets fell short.. The model from mcmaster of the push latch doesn't place the striker ball pin in the latch, but off of it. I had my point place on the base of the ball pin that is the center of the corvette plate which was 65mm up and 100mm out from the first set of studs that mount the plate to the dash. I should have manipulated the model to show the pins latched, but no big deal! It all fits like intended and you could never tell

 

Can you make another one?

My panel just kinda flops around and held in with duct tape…

 

Got the harness routed through the dash for the dbw harness and through the firewall for both the dbw and main harness. Everything is working nice so far. This holley harness is a bit crap though tbh.. I wish I would have just ordered HCR's harness, but I will probably do that next season as this will be fine for now.

 

Solid progress.

I hope these fancy computers wow the pants off us for all their headache and expense in the end.

 

@DRIVER456 can you pm me, I want to discuss how to connect the bcm with the Holley terminator if possible

 

What do you want to connect exactly?

 

I’m new to this and really would like someone to walk me through the steps on this…. As far as what to tap into for the ignition what fuses to use for the trans, throttle body power, all electronics, just over all questions

 

The holley has all of the fuses/relays it needs. You just need to supply it power and ground as needed in the instructions. You don't need to tap into anything. Remove from the factory harness what he holley will control. The install can be as simple or complicated as you'd like it to be.

 

I’ve spoke to numerous Holley dealers and installers and they all won’t touch the c5
because the bcm controls so many electrical components including the dash. They all state they can install it but the dash, ac, radio, door locks etc will not work without piggybacking everything

 

they're giving you the answer, piggyback it, if you want all that stuff to work

 

I am aware of that, I’m looking for help on how to since nobody will touch that which leads me to believe it must be a nightmare.

 

Where are you located and what year is your car?

 

I am located in suburbs of Detroit, my car is a fully rebuilt 97 with an ls3.

 

Have you started it yet on the stock computer? And are you using a crank trigger conversion box if so?

 

have not started it yet but I have a lingenfelter box already and everything set up for E-85

 

To run the holley, you are going to either need to swap the reluctor wheel out for a 24x, or you are going to need to run an aftermarket dash.