🔧 BUILD Upside-down M90 GTP build thread

[GTPpower]

Is that going together dry?

I lube it with fluid as it goes together. It helps the seals and orings to slide better.

 

[Rent Free]

I lube it with fluid as it goes together. It helps the seals and orings to slide better.

Looked dry in the pics sorry. Carry on.

 

[GTPpower]

I needed to make a new plate to mount the hydroboost to that fits in this area. I'm just going to probably remove the stock bracket and use the steering column bolts to mount it.



Kind of sketchy drilling this out with a hole saw.






Just need to paint it.

 

[GTPpower]

Got it painted along with the pan.




Here's the difference from the stock pan.

 

[GTPpower]

I'm so damn excited to have brakes that don't suck.

 

[GTPpower]

I've got the hard parts back together. Now just for the channel plate, valve body and all those bolts. A couple more hours and it should be done.

 

[Mr_Roboto]

Shit for some reason I missed the update. Keep going, I'm just trying to get my WBO2 cable run this weekend; Hell of a lot easier maybe some tuning as a bonus.

 

[GTPpower]

All put back together. Completely rebuilt with a few new abnormal parts, a new valve body, and a few updates and tricks for better performance, I've probably got $500 into it. Pretty easy and cheap to do by yourself.

I'm about half done with the hydroboost swap. Figured out how to make the stock pressure line work. Now, the pressure line to the rack needs to be shortened, then plumb up a drain and I'll have to make an adapter for the brake pedal.

 

[GTPpower]

My other line is done. I need to find new orings for both lines though.

 

[Turbocharged400sbc]

sexiest part of that is the ducktape

 

[GTPpower]

It's lightweight and air tight.

 

[GTPpower]

Return line plumbed in. I just need to figure out where to get the orings at for the pressure side fittings.


I'm going to see if I can get the brackets welded to my brake pedal this afternoon.

 

[Turbocharged400sbc]

thoise o rings are the same as those used by the fuel filter, doorman 800-013

 

[GTPpower]

thoise o rings are the same as those used by the fuel filter, doorman 800-013

Are they the same size for both the different fitting sizes?

 

[Turbocharged400sbc]

No but the kit has two for the 3/8 diameter hard-line and two for the 5/16

 

[GTPpower]

No but the kit has two for the 3/8 diameter hard-line and two for the 5/16

Awesome. Thanks for the help!

 

[GTPpower]

I swapped out the trans mount on the right. It's a year old and a pile of junk.



Transmission is in bitches!!!!

 

[GTPpower]

Found the parts to fix the coilovers


Installed them along with new axles. One axle boot was leaking quite a bit.

I wasn't very happy with the oil pressure this engine had, so I decided to shim the valve while I had he engine out.

Here you can see why I had a boost leak. This is as far as the bypass would close.

Welded in a bung for a iat sensor that's accurate.

And this one didn't go as well....

Cut it out and tried again....same thing....

Finally got it on the 3rd try.

And the engine is back in.

 

[v6buicks]

Aluminum is tricky. Looks like good progress though.

 

[GTPpower]

I can't figure it out. Sometimes it works perfectly and I can lay a great bead. Other times, it's like it doesn't want to weld. I can't figure out if I'm doing something wrong or is my cheap welder flaking out.

 

[v6buicks]

I'm not an expert by any means, but I'm not sure how new you are to this. Forgive me if this all seems obvious.

Are you trying to weld that all in one pass? With a small part like that and needing to weld around the whole thing, I would think that your issue would be resolved by lifting almost completely off the pedal by the end or just doing it in two passes with a long break in between. You have to start gradually letting off the pedal as soon as you get your pool because the heat dissipation we love about aluminum is a big part of what makes welding it a massive pain! Even if you are running a long straight bead, the whole piece is going to be horribly heat soaked by the end of a pass. It's only going to be worse if you're welding around a small bung like that. That's just my $0.02. I'm not sure how fancy your machine is either, so you might have settings to deal with this sort of thing.

 

[Turbocharged400sbc]

the cheapo pipes kits are polished and clear iridited from the few ive dealt with, it coats the insides too

 

[GTPpower]

It's probably 6 or 7 different welds for me to get around this bung. But I'm not really waiting for it to cool down in between. Maybe that's my problem. I just reposition the piece and weld again.

 

[GTPpower]

the cheapo pipes kits are polished and clear iridited from the few ive dealt with, it coats the insides too

Do you think I need to clean it better? Now that you mention that, the raw aluminum pieces did weld better.

 

[Turbocharged400sbc]

yupppp. if you look around the id you might find the iridite puddles that dried in the beads on the side of the pipe that was towards the ground when drying