1970 GTO Version 3.0

[ryeguy2006a]

Fantastic update Andrew! Love the new parts.

[andrewb70]

Fantastic update Andrew! Love the new parts.

Thanks. I can hopefully get the 90 installed in the GTO and figure out what needs to be done with the tunnel and crossmember. Preliminary indications are that the Holley crossmember will work perfectly with the 8HP.

Andrew

[andrewb70]

I had a little care package delivered today. Here are the fuel rail brackets, printed in stainless steel.






Tomorrow I will drill and tap as needed and maybe run the sides over some emery cloth on a granite block.

Andrew

[wfo guy]

Really nice parts. I realize that all that machine work is hidden but we know it's there.

[dhutton]

Hi Andrew. How strong is the printed stainless steel? Is it conductive like metal? Is it resin based? Just curious…

Don

[Steve68]

I'm with him^^^^^^

Good questions,

[andrewb70]

Hi Andrew. How strong is the printed stainless steel? Is it conductive like metal? Is it resin based? Just curious…

Don

I'm with him^^^^^^

Good questions,

Good questions. These parts are metal and have all properties of metal and can in fact be welded like any other metal part. Resin is not used in any part of the manufacturing process. The stainless steel is actually very hard and drilling and tapping the holes was a challenge. In fact, the material is so hard that my files barely worked.

I used a bench-top drill press and a step drill to open up the holes on the front and on the bottom.







Here they are mounted to the intake and holding up the fuel rails.






Andrew

[ryeguy2006a]

Really cool Andrew!

[andrewb70]

Really cool Andrew!

Thanks Ryan!

Andrew

[Ron S]

Dying to know how you like that transmission, and how hard it was to tune.

[andrewb70]

Here is the final raw, 3D printed aluminum charge pipe:















Andrew

[wfo guy]

Woo Hoo!

[Steve68]

Aluminum! now that is cool, looks good,

[andrewb70]

I ran across some videos by Devin Vanderhoof. It seems that he too has discovered the Hardwire Electronics PDM products. In fact, he has become the biggest distributor in the US for Hardwire. As you may recall, I already have a PDM 25 under the dash, but after seeing the videos for the new PDM 28, I knew that's what I needed in the GTO. I will use the PDM 25 in the Cougar or the Suburban.

Here is the PDM 28 as it arrived.



The size of the PDM 28 is substantial. Here you can see it compared to the Holley Dominator ECU. They are roughly the same size.

The reason for choosing the new PDM 28 is that it has two CAN busses. With the release of the Holly CAN documentation, the PDM 28 is fully compatible with Holley EFI.



Holley had a 3D model of the Dominator available for download.



An email to Hardwire provided the 3D model of the PDM 28.



I once again used my Shining 3D Einstar 3D scanner and generated a scan of the GTO dash and glove box area.

https://youtube.com/shorts/mhHSHdmFs...pASozBE8DwvHC6

The plan is to design a mounting system for the Dominator and the PDM in the area that used to be occupied by the glove box.

Andrew

[ryeguy2006a]

Looks fantastic Andrew! What are the benefits of the updated 28 vs the 25 PDM?

[Larry R]

Looking good Andrew.

[andrewb70]

Having a 3D scanner and a competent designer on call has really improved the overall quality of this build. I also want to thank Brian Wolf from Send Cut Send for helping out with this particular project.

I started with a 3D scan of the glovebox area without the glovebox. We obtained models of the Dominator and the Hardwire PDM from Holley and Hardwire and they were used to mock-up a mounting solution.



I wanted the LEDs on the PDM to be easily visible and I wanted the connectors to also be easily accessible. The tandem stacked arrangement is what we came up with.



James created the DXF files with SolidWorks and I uploaded them to Send Cut Send. They not only did the laser cutting but also the bending. Today I finally got the package after a bit of a delay due to the weather.



I expected to have to do some fiddling around with the bracket to get it to fit, but it dropped right in. The 3 holes that hold the glove box door lined up perfectly, as did the two slots up at the top.



I couldn't be happier with this solution.

Andrew

[wfo guy]

Paint, powder coat or other???? Looks good. Accurate measuring equals good results.

[ryeguy2006a]

So cool Andrew. Love seeing your updates.

[andrewb70]

Paint, powder coat or other???? Looks good. Accurate measuring equals good results.

Keeping it natural. It's a bracket that lives under the dash. This isn't a show car...LOL

So cool Andrew. Love seeing your updates.

Thanks Ryan!

Andrew