Quick Spool... long range Turbo?

Reply Subscribe

Thread Tools

Search this Thread

05-05-2009, 12:01 PM

#21

Braineack

Boost Czar

iTrader: (62)

Join Date: May 2005

Location: Chantilly, VA

Posts: 79,493

Total Cats: 4,080

Colorado Human Resource Association

05-05-2009, 01:05 PM

#22

AlexandertheOk

Junior Member

iTrader: (1)

Join Date: Apr 2008

Location: Los Alamos/Las Crues New Mexico

Posts: 98

Total Cats: 0

**** Hawking Recreational Activities?

05-05-2009, 01:32 PM

#23

Saml01

Elite Member

iTrader: (9)

Join Date: Jul 2007

Location: NYC

Posts: 5,710

Total Cats: 3

Quote:

Originally Posted by Savington

.80 A/R is compressor. Compressor A/R doesn't mean anything. You have an 80/64 T25, which is perfect. Good luck on the build. (Get your CHRA orientation right and don't **** up your tune.)

WTF do you mean it doesnt mean anything. It means plenty. Go read. It may not be the most important spec on a turbo, but its damn useful.

05-05-2009, 02:15 PM

#24

Braineack

Boost Czar

iTrader: (62)

Join Date: May 2005

Location: Chantilly, VA

Posts: 79,493

Total Cats: 4,080

The compressor A/R means diddly squat.

like you said, go read.

I'll make it easy:

Quote:

Originally Posted by Turbo Tech 102

Compressor A/R - Compressor performance is comparatively insensitive to changes in A/R. Larger A/R housings are sometimes used to optimize performance of low boost applications, and smaller A/R are used for high boost applications. However, as this influence of A/R on compressor performance is minor, there are not A/R options available for compressor housings.

05-05-2009, 02:33 PM

#25

ZX-Tex

Elite Member

iTrader: (15)

Join Date: Dec 2007

Location: San Antonio, Texas

Posts: 4,847

Total Cats: 27

Crack-like Horsepower Requiring Addicts.

05-05-2009, 02:57 PM

#26

Stein

Elite Member

iTrader: (46)

Join Date: Dec 2007

Location: Nebraska

Posts: 4,729

Total Cats: 166

I think my SR20T25 is an 80 but I don't remember. Spools 7 psi wastegate just before 3,000.

05-05-2009, 03:05 PM

#27

FRT_Fun

I'm a terrible person

iTrader: (19)

Join Date: Apr 2009

Location: Arizona

Posts: 7,174

Total Cats: 180

Canadian Human Rights Act

05-05-2009, 03:18 PM

#28

Savington

Former Vendor

iTrader: (31)

Join Date: Nov 2006

Location: Sunnyvale, CA

Posts: 15,442

Total Cats: 2,099

Quote:

Originally Posted by Saml01

WTF do you mean it doesnt mean anything. It means plenty. Go read. It may not be the most important spec on a turbo, but its damn useful.

Quote:

Originally Posted by Braineack

The compressor A/R means diddly squat.

like you said, go read.

thx 4 playin bro

05-05-2009, 05:44 PM

#29

saitrix

Newb

Join Date: Jan 2009

Location: Coventry, UK

Posts: 19

Total Cats: 0

Quote:

Originally Posted by samnavy

That turbo on a 1.6 with a Bell S4 manifold, decent ECU, and any 2.5" exhaust will probably make in the 220-230whp range at 15psi. You'll make 2-3psi by 2k rpm and be fully spooled in the 3200-3500range.

If you're sticking with bandaids, it'll still probably make a tick over 200whp at 15psi and spool the same.

CHRA (just google it dude)

Useful info.

I have a 1.8 but still handy to see that sort of thing, especially when I am also only aiming for 200whp.

05-06-2009, 12:10 AM

#30

Saml01

Elite Member

iTrader: (9)

Join Date: Jul 2007

Location: NYC

Posts: 5,710

Total Cats: 3

Quote:

Originally Posted by Braineack

The compressor A/R means diddly squat.

like you said, go read.

I'll make it easy:

That says nothing about it not meaning anything. Just not as important on compressor housings as it is on turbine housings.

A/R lets you easily compare the performance of two turbos with identical wheels but different housings.

In the case of the t25 80/64 or its smaller counterpart its pretty valid since the wheels are the same but the housings are different.