Drag to reposition cover

An m90 build to decimate all


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GTPpower

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Yeah, all them "plug the silencer port!" Guys would be humping your leg. Get dem vids up man!

How did you work out pcv?

I just blocked the pcv. I'm using a VC breather for crankcase ventilation for now. I'll probably switch to a catch can as this starts to make more power.
 
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GTPpower GTPpower

did you consider having the blower exit driver side?

may have given you more room passenger side for whatever- possibly eliminated that hardcore 90* turn your piping has?

kinda like this.

View attachment 43853
That 90° turn has basically no effect on anything. But yes I did consider routing it to the driver's side. There will eventually be a turbo over there, so it would be just as crowded.


The air from the blower also exits from the rotors towards the passenger side. It's better to exit that direction, although it really wouldn't make a difference in the real world.
 

Yaj Yak

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i mean, i dont know that with an m90 that 90* would have "no effect on anything" it's going to have some effect...
 

Yaj Yak

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you can honestly say you don't think there is any restriction to this whatsoever?

1570631493906.png
 
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I also forgot to mention that I'm using the factory bbv as a blowoff valve on this. I might change that up because it makes the weirdest sound....
 
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Most people at the track say something about "crazy."
 

greasy

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I think you need to watch this video. If you MUST have a 90* bend in the system, it should be a sweeping 90*. Your 90* bend has the airflow smashing into a wall which will seriously disrupt airflow/velocity which you want to improve by having the most straight runs/as little bends in your system as possible.

 
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I think you need to watch this video. If you MUST have a 90* bend in the system, it should be a sweeping 90*. Your 90* bend has the airflow smashing into a wall which will seriously disrupt airflow/velocity which you want to improve by having the most straight runs/as little bends in your system as possible.

That really doesn't have anything to do with a forced induction system under pressure. I expected to see a bigger difference than he showed in that situation.

Obviously a sharp 90 is worse than a sweeping 90, and I'll probably change it over the winter. I would bet that I don't gain a single horsepower from it though.
 

greasy

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Are you serious? If it doesn't, then how come ZERO fabricators make their systems with hard 90's?
 
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Are you serious? If it doesn't, then how come ZERO fabricators make there systems with hard 90's?
For a couple reasons.

It's more difficult to make the sharp 90 like I did. Time consuming and expensive.

People that see it lose their minds because they think it's some huge restriction.
 

greasy

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For a couple reasons.

It's more difficult to make the sharp 90 like I did. Time consuming and expensive.

People that see it lose their minds because they think it's some huge restriction.
It is hard to make a 90?

You take a straight piece of pipe, cut it on a 45 degree angle, then weld the 2 45's together, and surprise......you have a hard 90. There is nothing expensive or time consuming about it.

If you can weld and fabricate like you can, surely you can figure out a better way to make a sweeping 90 degree bend vs a hard 90. Having air running into that spots will not only cause a pressure drop, it will create unnecessary turbulence.
 
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It is hard to make a 90?

You take a straight piece of pipe, cut it on a 45 degree angle, then weld the 2 45's together, and surprise......you have a hard 90. There is nothing expensive or time consuming about it.

If you can weld and fabricate like you can, surely you can figure out a better way to make a sweeping 90 degree bend vs a hard 90. Having air running into that spots will not only cause a pressure drop, it will create unnecessary turbulence.
Absolutely it's difficult to do. It probably took me at least a half hour to make that joint, and that's after I had everything set up for it. A sweeping 90.....take it out of the box, pull off the protective foam and done.

Do you want me to plumb a gauge in before and after that bend to show you there is no pressure drop?
 

greasy

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Yes, please do. Also please replace all of the other soft 90's with hard 90's everywhere else in the system. It will look better and not perform any worse. Send a pic of everything plumbed in when you are done and I will send you a check for time/materials.
 
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GTPpower

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Nah, I'm not looking to redesign the whole system.
 
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bandook

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He said he's gonna swap that 90°. Why so ornery, greasy? That has to be a restriction of some kind, but probably not much at his boost level. I think he wants to dual charge it, so I'm sure it will be sorted before then.
 

greasy

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I and others are giving him advice on bettering an aspect of his build. He chooses to ignore or be ignorant to the facts. If he wants to run hard 90’s and think it doesn’t make a difference then it’s clear he is either being too stubborn to change or unwilling to admit he’s wrong.

Either way it has gotten to the point where it is funny and I’ll exit stage left. Time to start a high end intercooler piping company that only sells hard 90 degree piping, should make a mint!
 
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Should I expect to pick up 5psi switching to a smooth 90?
 

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