🔧 BUILD Upside-down M90 GTP build thread

[Rdrnnr]

It's a pleasure to get whooped on by you guys

 

[Mr_Roboto]

Nothing seems to have broken that is okay in my books.

 

[Turbocharged400sbc]

now ya dun it, jinxed yerself

 

[GTPpower]

I need to try and figure out how to boost leak test this thing. Maybe I'll get a plate of 1/4" steel, drill and tap a couple holes in the blower inlet, and mount the plate to the face of it.

 

[Turbocharged400sbc]

use a cereal box to make a no hole TB gasket ad air via vac line

 

[Rdrnnr]

I need to try and figure out how to boost leak test this thing. Maybe I'll get a plate of 1/4" steel, drill and tap a couple holes in the blower inlet, and mount the plate to the face of it.

One nice thing about my cable drive car is havin the evap port to plug into and blocking the intake on the turbo off usually covers everything pretty easy. I think I need to recal my gauge tho im leak free air wise beside what runs out the exhaust and still only showin 12" and 5 lbs. Doesnt really add up to 310 whp tho so im sure I'm hittin my 10 lbs on the spring

You can't just use like a pvc end cap with an air fitting anywhere on that monster?

 

[Turbocharged400sbc]

also check you plugs, i may have wasted most of my day today diagnosing a no start that is carbon fouled plugs.....103's dont like to have short runtimes damnit james

 

[GTPpower]

Remember, my TB is right before the intake manifold. To pressure test through the blower, there is no flange anymore, so I will have to make something.

 

[Turbocharged400sbc]

yeah a block of wood and a 2x4 cut to wedge between it and the fender to plug opening.

i know there are rubber expanding plumbing plugs at the despot/others

 

[GTPpower]

yeah a block of wood and a 2x4 cut to wedge between it and the fender to plug opening.

i know there are rubber expanding plumbing plugs at the despot/others

I would do that, but the inlet is nowhere close to round, so I think it pretty much needs to be a plate with some rtv.

 

[GTPpower]

Initial tests, I could not get the system to even build pressure with my compressor.

So I pulled the blower off and stuck a shop vac set to blow in the pipe. This is not a perfect method, but so far I've counted about 6 leaks. Pretty much all of them are on crappy welds.





The pipe should be easy enough to fix, but I'm going to have to pull the lim to fix the other one. I'm not too excited for that.

 

[Turbocharged400sbc]

Use vacuum and Loctite type Super Glue.

One of the local impregnating companies uses Loctite resins to seal microscopic leaks in components.

Start it up and drop a few drops on there and then shut it down

 

[GTPpower]

Use vacuum and Loctite type Super Glue.

One of the local impregnating companies uses Loctite resins to seal microscopic leaks in components.

Start it up and drop a few drops on there and then shut it down

I don't know if I can even get down there with anything. It's such a tight squeeze, I don't think I can even get my hand in there. I'll have to try though.

Do parts stores have that glue?

 

[Turbocharged400sbc]

Probably. I would say you'd be able to pump the super glue down through like a brake cleaner straw or a coffee stirrer

 

[GTPpower]

One pipe is all fixed up. I had six leaks in this pipe alone. I'll have to make sure to remember to clean the inside of the pipe before I weld it next time. All these new welds turned out pretty good.

 

[Turbocharged400sbc]

wasnt that the pipe you initially started to weld with the anodizing/clear iridite on the surfaces?

 

[GTPpower]

Yeah I think so. After taking a scotch Brite to it, along with the normal cleaning, it welded like butter. Lesson learned there.

The other charge pipe had 2 leaks, so up to 8 now. I think the rest are on the lim. I think I can get in there with the welder now that I look more closely at it.

 

[GTPpower]

Up to about 13 boost leaks. I can't count them very well here, but there looks to be 4-5. Of course they are all on the bottom side, where it's much more difficult to get to. But, I do think I can get in there with the welder.

 

[Mr_Roboto]

Keep at it you need those horsepowers.

 

[Turbocharged400sbc]

....and the practice

 

[GTPpower]

That's no joke. I'll chalk this one up to welding 15 year old cast aluminum. But there were a lot of leaks here.... probably at least 10 alone at this connection. And they were big. I've got maybe 3 patched up so far. This is a pretty tough position.

 

[GTPpower]

Got a few more fixed, but made one worse. This may not be possible without pulling the manifold anymore.

 

[Turbocharged400sbc]

Oh fuck

 

[Mr_Roboto]

Some days shit just has to be done the hard way.......

 

[GTPpower]

I guess I should have tried the glue like James told me to. Oh well.