1970 GTO V3

[andrewb70]

Originally Posted by camcojb

What is your power goal for the car? What turbo?

It's a custom BW based turbo built by Work Turbo in Alabama. It has a 72mm compressor wheel and a Tial turbine housing. I'll Max out that compressor at about 20psi, which will be about 900hp at the crank.

Andrew

[camcojb]

Originally Posted by andrewb70

It's a custom BW based turbo built by Work Turbo in Alabama. It has a 72mm compressor wheel and a Tial turbine housing. I'll Max out that compressor at about 20psi, which will be about 900hp at the crank.

Andrew

Plenty for fun...

[andrewb70]

Today we decided to take a little break from turbo stuff and figure out how to upgrade the brakes. Over the last year or so I have been seeing electronically assisted brakes on various cars and on a couple of YouTube channels that I watch. The technology seems really cool and by all accounts they work great.

I started by removing the manual MC and the old mount for the clutch MC. There is a little rust here and there, but remember, this car was "done" 20 years ago. That area will definitely get cleaned up.



I figured a good place to start to be these brackets that I got them I was planning on doing vacuum power brakes. These are from DSE and it is their reduced angle bracket.







The is the Gen 1 Bosch iBooster unit that I got. It is from a 2010ish Tesla Model S with the adaptive cruise control. Bosch has a Gen 2 model of the iBooster available, but I don't like the looks of them and I am sure that none of the features of the new unit are even applicable to what we are doing here.



After a little welding, milling and hole sawing, we had the bracket modified to fit the iBooster.



It is bolted to the firewall here, but there is still a lot to sort out.



I am not really happy with how the pushrod alignment is looking at the moment. The unit might actually need to be tilted up at the front a little more, but I am already concerned about hood clearance. We will sort out the details the next time.



I really like the way these look. They add a little high-tech touch to the engine compartment.



Andrew

[andrewb70]

This seems like a pretty straightforward part to make, but it's quite intricate. There is very little space and we had to use a donut to get the radii tight enough to connect the dots.



There is a slight gap where the pipe meets the compressor discharge. This was done to accommodate any movement due to heat, etc...The Summit Racing clamp is made to account for this movement. All that is left is to finish a couple of welds, add the blow-off valve, which will go on the outside bend just before the throttle body, and smooth out whichever welds we can.

Andrew

[andrewb70]

Today I had a few hours to spare, so I drove to Vic's house to make a little close-out panel that would go under the brake booster. In one of the previous pictures you can see the hole that was left after I removed the clutch MC mount. That hole needed to be covered up and I also needed to clean up some of the peeling paint and surface rust that was there.

I scraped the loose paint off and then scrubbed the surface with an abrasive pad. Then I sprayed some primer into a small cup and used a small brush to apply it and then did the same with some black paint. The point wasn't to make it look pretty, but to seal the exposed metal.



I then started to layer 2" masking tape over the whole area.



I used a pencil to trace out the outline of the patch that I wanted to cover and also marked out the 3 mounting holes.



I then transferred the masking tape template to some thin cardboard and used a sharpie to draw out the shape that would capture the mounting bolts and that would overlap the opening that I wanted to cover.



I cut the cardboard with some scissors and did a trial fit. Everything was looking pretty good.



I used the cardboard template to transfer the shape and the holes to a piece of 1/8" aluminum plate.



I cut the couch shape on a bandsaw and then used a belt sander the arrive at the final shape. I also used a 2" hole saw to make the hole.



Since the column pokes through the plate at an angle, the opening had to be oval, not round, so I used a file to contour the opening until the panel fit flush against the firewall.



Then I drilled out the 3 mounting holes.



The panel fits really well. It will get painted black and I will use some window mount urethane to seal the plate against the firewall. This will keep water from collecting and keep that area clean and dry. Once the booster is installed, the panel won't really be visible, but I think it adds a finished touch to an area that looks a little raggedy before.

Andrew

[camcojb]

Nice work.

[andrewb70]

Originally Posted by camcojb

Nice work.

Thanks Jody!

Andrew

[andrewb70]

Today wasn't terribly productive. I managed to install the new Borgeson steering box. Overall it looked pretty similar to my ancient AGR steering box, with the exception of having 4 mounting ears instead of 3. My frame only has 3 mounts, so the 4th is just, there...



I was able to reuse the fittings from the old box on the new box. The Borgeson box uses metric fittings with o-rings, which were the same size as my old AGR box.



The Borgeson box also uses a slightly smaller input shaft.

Andrew

[camcojb]

Put one of those boxes on my buddies 72 Chevelle, he loves it.

[andrewb70]

Originally Posted by camcojb

Put one of those boxes on my buddies 72 Chevelle, he loves it.

That's great to hear. I was never really happy with the on-center feel of the AGR box. I hope the Borgeson box is better in that respect.

Andrew