Razorlab - 2020 LE build thread

[razorlab]

Not having seen one in the flesh or had a chance to inspect one in detail I'm not sure I'd be totally comfortable with those style of machined centrifugal compressor blades. The images seem to indicate it leaves a small saw tooth leading edge on each blade and if that's the case it's not really a great idea with regards to fatigue and failure resistance. If you get a little blade tip rub that produces some drag on the blade at the tip then instead of the tip bending it's going to shear along the machining lines along the blade face initiated from the leading edge thats less than smooth. Every overnight check we used to look at the leading edge of fan blades and any nicks or marks we dressed out and polished then got the NDI guys over to crack check the blades. Even during daily turn arounds we used to do this if the nicks were bad enough. The less than smooth leading edges do produce stress cracking along the blade chord eventually and we used to monitor the cracking progression of the internal compressor blades via borscoping to determine when we pulled the engine.
There's also the possibility I guess that the turbo has had a bearing failure major or minor thats allowed the compressor wheel to walk around and it have a big rub on the housing thats caused the blade failure.

Yea maybe, although it didn't shear inline with those machine lines.

My current theory is that the bearing got hurt last year when my charge pipe blew up and it might have over oversped the turbo in that short moment, and then when I banged on it hard again this first event of this year it had enough bearing movement to contact the compressor housing. I only got about 10 laps in before it happened.

Or the bearing was just worn out from me beating the crap out of it for 40+ events.

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[razorlab]

So I started digging in more to find any other pieces of compressor wheel in my intake manifold, I found a third piece and much to my surprise, I also found part of the throttle body seal stuck in the intercooler fins kind of hiding behind the oil filter hump that I need to fish out. It looks like part of the seal was cut from the pressure of the body being bolted to the manifold.

I also started scoping my cylinders to make sure no debris got into them. So far 1-3 look clean. Three was hard to see everything as the piston was too close.

 

[razorlab]

What a difference 3mm makes!

 

[Habu]

Where does pure get their housings from?

 

[razorlab]

Where does pure get their housings from?

They are OEM unless it's a new cast version, which they do not offer for 2 ports yet.

 

[Habu]

They are OEM unless it's a new cast version, which they do not offer for 2 ports yet.

Gotcha.

 

[Rensuhlo]

What a difference 3mm makes!

There's a joke in there and if I was a smarter man, I'd be able to say it.

 

[J29DB03]

There's a joke in there and if I was a smarter man, I'd be able to say it.

 

[razorlab]

Trying to get this splitter to actually work by lowering it a bit. We’ll see…

 

[shaloot]

Apologies for not seeing this before.

I chose the MAD intake because it was cheap. haha. Figured if it sucked I wouldn't have a big investment in it. It ended up working well.

I bought the CTS inlet and then Paradigm inlet. The paradigm inlet ended up fitting like ass and had a weird welded in bit for clearance that I wasn't too keen about. CTS is cast and fit well. I also leaned more towards the cast CTS because at some point I will be getting a bung welded in for a IAT sensor so I can log pre-turbo intake temps.

I'm usually not a fan of CTS parts but this one works and fits pretty well.

How did you like the fitment of the PCV breather connection to the CTS inlet? Do you recall if it’s placement left plenty of room around it?

on MST V3 it’s IMO really past the limit of stretching that connector.
Wish I read your build thread before lol seems like CTS + Mad is lovely yet cheap.

 

[razorlab]

How did you like the fitment of the PCV breather connection to the CTS inlet? Do you recall if it’s placement left plenty of room around it?

on MST V3 it’s IMO really past the limit of stretching that connector.
Wish I read your build thread before lol seems like CTS + Mad is lovely yet cheap.

Fits just like OEM.

 

[razorlab]

Doing thangs.

 

[Habu]

Doing thangs.

Injectors?

 

[razorlab]

Injectors?

Correct.

 

[FLtrackdays]

Your car is going to be quicker than a GT4 when you’re done. How much HP do you think she’ll be pulling when complete? And are you going for a specific weight as well? Great build Bryan!

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