the ECU adjusts for all conditions

 

Tricking T7 winds up going badly. About as far as you can go is a SMBC for a bit more boost in the governed gears. Also with 20psi on a stock car at sea level the stock turbo would be out of its efficiency range. Not good. Just save up the $900 for software hehe.

 

Id imagine youll cause Air Fuel issues as at altitude the air is less dense - requiring the turbo to flow at a higher pressure to make up for the density. In esscense your not making any more power at altitude, only more boost. If you trick it into thinking your at altitude (which would involve tricking the MAF) its going to think your flowing less air than you really are and wont provide enough fuel for the air you are flowing.

In English - youll run lean and could do serious damage. Save the money in the long run and get a tune if you want more power.

 

Cooper nailed it.

At altitude, Trionic adjusts the boost level to compensate for the lower air density. T5 does it by measuring the absolute manifold pressure, T7 by measuring airmass flow.

 

Yep. I couldn't believe I only had 11lbs peak boost the other night
(9 degrees outside) and the car ran like it was possessed.

Don't equate boost pressure with horsepower. There is an interrelation, but more boost does not necessarily equal more horsepower.

 

There's a pressure sensor on the T-7 board itself too.

Hmm...wonder what would happen if you put a baloon around that and put a vacuum on it?

 

Haha on the baloon idea. To my knowledge on T7, which I admit is limited, a MAP sensor, if there is one, would provide a confirmation reading on boost used to determine air mass inside the manifold through density equation and the IAT like T5 does. I'll go search online to see if T7 cars have a map.

 

To my knowledge on T7, which I admit is limited, the MAP sensor is used as a confirmation reading on boost and to determine air mass inside the manifold through density equation and the IAT like T5 does.

MAP sensor on T7? Since when?

 

Ok this is a little interesting. The only T7 cars that have a MAP sensor on them are the og9-3 (non viggen) cars from 2000-2003. This is from searching through eeuroparts.com btw.

 

Pretty sure every T7 9-3 as a MAF, not a MAP. Your T5 9-3 has a MAP tho

 

From euro.

Part Code: 9173386

Part Name: Air Mass Meter

Part Brand: Genuine Saab

Part Cost: $152.10

Part Core Charge: $0.00

Part Description:
Air mass meter (mass air flow sensor) for any 99-02 Viggen, 00-02 9-3 all, 03 convertible, 99-05 9-5 all.

Part Code: 9132374

Part Name: MAP sensor

Part Brand: Genuine Saab

Part Cost: $122.40

Part Core Charge: $0.00

Part Description:
MAP sensor for any 94-98 900 turbo, 94-98 9000 turbo, 9-3 99-03 (not Viggen). Genuine Saab.

T7 og 9-3 have both maf and map.

 

Yea, Just the 99 9-3 (Non Viggen) has MAP.

I know for a fact my 2000 has a MAF

 

Griffen, then why would eeuro go and list that all og9-3 excluding viggen had MAP's. I'm not arguing that the 9-3 t7's don't have a MAF, I know they do. Go and see if your 9-3 has a MAP though, it would be up on the left side (looking into the engine) attached to the strut bar.

 

LMFAO u guys got a lot of learning to do STX nailed it on the head. dont trick T7

 

ive done most of my learning at this point. t7 is a complicated thing that is not to be tricked and messed with. leave it alone and make some hardware changes, then get the software to go with it. safe and proven....do it. cause its fun too.

 

Thanks bud. When I was searching all of eeuroparts.com for one on the 9-5 i couldn't find it listed in the engine electrical section.