Fast Intentions Stage 2 TT build by MA-Motorsports.

Spooler · 07-13-2021, 08:33 PM

Quote:

Originally Posted by redondoaveb

The FI Stage 1 turbos have a .86 AR turbine housing and the Stage (Seb) have a smaller .82 AR Turbine housing. I assume a larger turbine housing on the smaller Stage 1 turbos brings in more air but what is the benefit of going with a smaller housing on a larger turbo like on the Stage Seb turbos?

The AR is talking about the exhaust housing to intake housing size. T-2, T-3,T-4. T-6 are the housing sizes. That is the frame size of the turbo. Garret GT2860 is using a frame size of T-2. Garrett GT3076 is using a T-3 frame size. The frame size dictates how large the housing is itself. The larger the frame size, the larger the housing. You can run a larger housing with a tighter AR and get more power. That's the simple version.

redondoaveb · 07-13-2021, 08:47 PM

Quote:

Originally Posted by Spooler

The AR is talking about the exhaust housing to intake housing size. T-2, T-3,T-4. T-6 are the housing sizes. That is the frame size of the turbo. Garret GT2860 is using a frame size of T-2. Garrett GT3076 is using a T-3 frame size. The frame size dictates how large the housing is itself. The larger the frame size, the larger the housing. You can run a larger housing with a tighter AR and get more power. That's the simple version.

I'm glad you didn't give me the complicated version

Spooler · 07-13-2021, 09:05 PM

Here is why the FI intercooler is having issues at high HP. Very similar problem. The end caps are tiny.

Spooler · 07-13-2021, 09:26 PM

A good read. The math behind it.
https://www.garrettmotion.com/news/n...with-rob-dahm/

Spooler · 07-13-2021, 09:28 PM

More. In depth about AR selection.

https://www.garrettmotion.com/news/n...-turbo-system/

Elmo370z · 07-13-2021, 09:30 PM

Quote:

Originally Posted by Spooler

Whatever, I am not running pump gas unless I have to get home. That's it.

Lol fair enough

redondoaveb · 07-13-2021, 09:48 PM

Quote:

Originally Posted by Spooler

A good read. The math behind it.
https://www.garrettmotion.com/news/n...with-rob-dahm/

Rusty · 07-13-2021, 10:43 PM

Quote:

Originally Posted by redondoaveb

when he talks. Do you see tweety birds floating above your head?

Spooler · 07-13-2021, 10:56 PM

Quote:

Originally Posted by Rusty

when he talks. Do you see tweety birds floating above your head?

I know you get it.

BettyZ · 07-13-2021, 10:57 PM

Quote:

Originally Posted by redondoaveb

moar intercooler multiplied by the square root of the earth's diametric circumsized radius minus the shaft = moar horsepowerz. Got it.

Rusty · 07-13-2021, 10:59 PM

Quote:

Originally Posted by Spooler

I know you get it.

I'm used to dealing with them on Very LARGE Engines.

redondoaveb · 07-13-2021, 11:04 PM

Quote:

Originally Posted by BettyZ

moar intercooler multiplied by the square root of the earth's diametric circumsized radius minus the shaft = moar horsepowerz. Got it.

See, you explained it perfectly

Why couldn't Spooler do that? He had to bring numbers into it. I ain't no gooder with numbers

Spooler · 07-13-2021, 11:06 PM

Go back and look at the video for a glimpse of the FI intercooler. I have no idea how my car will do but it should do well. How well, I don't know. If I was measuring boost pressure before and after the intercooler I would know what kind a pressure drop I am getting. At high boost I beat I am dropping 2 to 4 psi after the intercooler because of the end caps. That drop creates heat.

Spooler · 07-13-2021, 11:08 PM

One heck of a journey and I am still learning. If it was easy, everybody would do it.

redondoaveb · 07-13-2021, 11:09 PM

Quote:

Originally Posted by Spooler

Go back and look at the video for a glimpse of the FI intercooler. I have no idea how my car will do but it should do well. How well, I don't know. If I was measuring boost pressure before and after the intercooler I would know what kind a pressure drop I am getting. At high boost I beat I am dropping 2 to 4 psi after the intercooler because of the end caps. That drop creates heat.

Why did they not measure boost pressure before and after the intercooler?

07-13-2021, 09:05 PM	#4038 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,834 Drives: 2013 Nismo 370z Rep Power: 2684392	Here is why the FI intercooler is having issues at high HP. Very similar problem. The end caps are tiny. Rusty, Hotrodz, Elmo370z and 1 others like this. Last edited by Spooler; 07-13-2021 at 09:34 PM.

07-13-2021, 09:26 PM	#4039 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,834 Drives: 2013 Nismo 370z Rep Power: 2684392	A good read. The math behind it. https://www.garrettmotion.com/news/n...with-rob-dahm/ redondoaveb likes this. Last edited by Spooler; 07-13-2021 at 09:29 PM.

07-13-2021, 09:28 PM	#4040 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,834 Drives: 2013 Nismo 370z Rep Power: 2684392	More. In depth about AR selection. https://www.garrettmotion.com/news/n...-turbo-system/ redondoaveb likes this.

07-13-2021, 11:06 PM	#4048 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,834 Drives: 2013 Nismo 370z Rep Power: 2684392	Go back and look at the video for a glimpse of the FI intercooler. I have no idea how my car will do but it should do well. How well, I don't know. If I was measuring boost pressure before and after the intercooler I would know what kind a pressure drop I am getting. At high boost I beat I am dropping 2 to 4 psi after the intercooler because of the end caps. That drop creates heat. FL 4Motion, Rusty, Hotrodz and 3 others like this.

07-13-2021, 11:08 PM	#4049 (permalink)
Spooler A True Z Fanatic Join Date: Jun 2014 Location: Ga Posts: 13,834 Drives: 2013 Nismo 370z Rep Power: 2684392	One heck of a journey and I am still learning. If it was easy, everybody would do it. FL 4Motion, BOLIO 671, Rusty and 3 others like this.

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