?? about Vishnu and Cobb

Reply Subscribe

Thread Tools

Search this Thread

Feb 20, 2005 | 11:03 AM

Howler

Thread Starter

Registered User

Joined: Jan 2004

Posts: 1,140

From: -47.15, -126.716667

Car Info: 2005 Legacy GT Lmt

?? about Vishnu and Cobb

At what elevation was all his (Vishnu) tuning done at? Cobb states 4500ft for his. Does the huge elvation change matter for us?

Feb 20, 2005 | 01:18 PM

JT-STI

Guest

Posts: n/a

Vishnu tuning is located in the Bay area, close to oakland , CA I think. It does make a difference - elevated = thinner air less O2.

Feb 20, 2005 | 01:39 PM

Howler

Thread Starter

Registered User

Joined: Jan 2004

Posts: 1,140

From: -47.15, -126.716667

Car Info: 2005 Legacy GT Lmt

So that being true. The Cobb tuning would be running extremely lean or rich? The vishnu would be...what??

Also, im under the assumption that running rich is good for a turbo car? Or am i just confusing my self w/ a low vs high compression car.

Feb 20, 2005 | 02:50 PM

keirnna

VIP Member

iTrader: (8)

Joined: Nov 2003

Posts: 2,659

From: Okinawa, Japan

Car Info: 1996 STI V3 Type RA

The thing is running rich is safe, but running lean is not. You will loose some performance if you are running anything off perfect, but rich is the better side to go for. The thing is the difference in humidity, and I guess the elevation makes a small difference. I talked to a few tunners about it a while ago, and the ECU reads in absolute air presure which is the current air pressure. 1 bar at sea level + cars boost = absolute boost. If that is true elevation doesn't make as much difference because the ecu can recognize the change. Talk to cobb and vishnu both before you buy the product and ask them some questions.

Feb 20, 2005 | 04:27 PM

JT-STI

Guest

Posts: n/a

I only got one thing to say about this...keirnna had a cobb + turboback = 13.1 @ 102mph, and Im currently running just a vishnu + qtp downpipe = 12.7 @ 107mph...any other questions? We both had similar performing cars when it was stock. Of course, we used 100 octane gas but it doesnt help on a car that has stock tuning, in fact it slows it down. With just the vishnu + qtp (xpass closed - thru stock catback) downpipe and 92 octane pump gas + 12.9 @ 103mph! Only drawback is that you'll need a laptop to change tuning for the vishnu.