1970 GTO Version 3.0

[gto406]

This morning I spent a few hours trying to help a local customer with a Coyote no-start issue, so I didn't have time mess with the car. But Vic sent me these pictures in the afternoon.



I think as far as looks go, it looks pretty good.





Tomorrow I will have a chance to go se it in person and se what kind of clearance there is with the hood. We are also going to install the Ring Brothers billet hinges, just to make sure everything fits the way it should.

Andrew

Looks great Andrew. I have the RB hinges on my ‘69 Firebird and they are great. RB really make very high quality parts. The billet hood hinges on my GTO have already been through 1 set of gas struts (they are not Ring Brothers) and the hinges are only about 5 yrs old.

[andrewb70]

Looks great Andrew. I have the RB hinges on my ‘69 Firebird and they are great. RB really make very high quality parts. The billet hood hinges on my GTO have already been through 1 set of gas struts (they are not Ring Brothers) and the hinges are only about 5 yrs old.

Thanks for the kind words. I really like the RB hinges. The hood fits better than it ever has, although the fact that the hood doesn't open as much is a little annoying.

Andrew

[Larry Callahan]

Wow! That looks great.

Way to make it fit.

[wfo guy]

Intake looks good.

[andrewb70]

Wow! That looks great.

Way to make it fit.

Intake looks good.

Thanks guys!

Andrew

[SPLATT71MC]

The piece you have to close up your intake would be a great place to have some custom engraving done.

[andrewb70]

The piece you have to close up your intake would be a great place to have some custom engraving done.

It sure does ::wink::

Andrew

[andrewb70]

One of the items to replace for this update was the steering shaft. There was nothing wrong with it, but I never liked that it was a solid shaft.

This is a collapsable shaft and new u-joints from Borgeson. I will also be replacing my 20 year old AGR steering box with one from Borgeson.
In this picture the shaft is is already trimmed to fit.



This is the bushing that supports the steering shaft inside the column. Whenever I would drive the car on a hot summer day, I would notice that the steering would get a little sticky. I suspect that this nylon bushing swell up from the heat and causes the steering to bind a little. The holes are from the screws that I installed to pull the bushing with a slide hammer.



The bushing on the left is one that Vic made on his lathe. It is made out of Delrin, which I hope will be more stable with temperature changes.



Here it is tapped into the steering column.



Andrew

[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

[STREETFIGHTER50]

Wow lotsa nice work Andrew! Looking awesome!

[ryeguy2006a]

Great work on the intake Andrew! That solves a lot of problems for you and it looks amazing! I love that brake booster. Very interested to know more about that.

[dontlifttoshift]

What is the pedal ratio in a Tesla?......what is the bore size on that master cylinder? *** 26mm ***

***lots of info here https://www.evcreate.nl/installing-the-ibooster/ ***

[andrewb70]

What is the pedal ratio in a Tesla?......what is the bore size on that master cylinder? *** 26mm ***

***lots of info here https://www.evcreate.nl/installing-the-ibooster/ ***

Donny,

That's a great link and where I got a lot of my information. I also found a source for a pretty nice wring harness here:

https://tulayswirewerks.com/product/...-wire-harness/

Andrew

[Tsaints1115]

These guys sell a booster mount as well as a master cylinder adapter.

https://www.bbtfabrications.com/fab-...!/c/0/offset=9

[andrewb70]

These guys sell a booster mount as well as a master cylinder adapter.

https://www.bbtfabrications.com/fab-...!/c/0/offset=9

Using this adapter plate would make the iBooster practically a bolt in deal.

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

[wfo guy]

Interesting to watch. Now, I'm going to go read all of the ibooster links.

[andrewb70]

Interesting to watch. Now, I'm going to go read all of the ibooster links.

Here is a fun YouTube video that talks about the iBooster and brakes in general.



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

[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