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Performance Modifications for the NG900 / Old 9-3 This forum contains PERFORMANCE related Q&A's for the NG900 and 9-3. This may also include suspension.

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Old 07-21-2007, 05:01 PM   #1
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Can someone help me find a SMBC for my car?
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Old 07-21-2007, 05:07 PM   #2
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http://smartperformance.net/
there you go
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Old 07-21-2007, 05:09 PM   #3
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Why thank you!
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^ jk

Thanks
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Old 07-22-2007, 12:44 PM   #4
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How many more hp does it give into first and second gear? how much faster is the spool up?
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Old 07-22-2007, 12:50 PM   #5
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SEARCH:

https://www.saablink.net/forum/search...earchid=468247
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Old 07-22-2007, 01:02 PM   #6
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What is the fuel cutoff for a T7 9-3SE
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Old 07-22-2007, 01:03 PM   #7
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Dude.
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Old 07-22-2007, 01:04 PM   #8
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Search.
*fixed
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Old 07-22-2007, 01:04 PM   #9
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Cant find. Too lazy. Im on it.
sorry
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Old 07-22-2007, 01:24 PM   #10
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I cant find it anywhere???
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Old 07-22-2007, 01:26 PM   #11
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*sigh*

On Trionic 5, the fuel cut was at 15.5psi as I recall.

With T7, it's a bit more adaptive. There's not a set figure. But it shouldn't really matter; you can't adjust peak boost with a SMBC.
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Old 07-22-2007, 01:30 PM   #12
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Got this from saabnet.

The incredible power output of the Viggen's engine is primarily attributable to the larger turbocharger, which produces maximum boost pressure of 1.4 bar, or a full 20 psi, and is assisted by less restrictive air intake pipes and a performance exhaust system. Although only 15-16 psi of boost pressure may be required to achieve maximum power and torque at or near sea level, Saab's Trionic 7 engine management system allows the turbo to produce up to 20 psi at higher altitudes to compensate for less dense air. The result is maximum power is available at altitudes approaching 10,000 feet.
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Old 07-22-2007, 01:35 PM   #13
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Got this from saabnet.

The incredible power output of the Viggen's engine is primarily attributable to the larger turbocharger, which produces maximum boost pressure of 1.4 bar, or a full 20 psi, and is assisted by less restrictive air intake pipes and a performance exhaust system. Although only 15-16 psi of boost pressure may be required to achieve maximum power and torque at or near sea level, Saab's Trionic 7 engine management system allows the turbo to produce up to 20 psi at higher altitudes to compensate for less dense air. The result is maximum power is available at altitudes approaching 10,000 feet.
Yes. That doesn't have anything to do with a SMBC.

Anyhoo, here's a thread with some good reading in it for ya:
https://www.saablink.net/forum/showthread.php?t=13780

Let me chime in and say that I would recommend against using an SMBC. Boost is limited by the ECU in first and second to help prevent spinning tires and to prolong the life of your transmission, among other things. And as STX says in that thread I linked, T7 is crazy smart and crazy adaptive and crazy safe. Why screw with it using hacks?

I've also seen SMBCs on T7 lead to the engine running lean (since you'll make more boost in first and second without the ECU adding fuel to compensate), which can lead to melting pistons. Is the extra maybe 5hp in first and second really worth running that risk? I don't think so.

Just hold out for a tune. It'll let you make more boost without putting your engine in harm's way.
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Old 07-30-2007, 10:21 AM   #14
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Yes. That doesn't have anything to do with a SMBC.
Let me chime in and say that I would recommend against using an SMBC. Boost is limited by the ECU in first and second to help prevent spinning tires and to prolong the life of your transmission, among other things. And as STX says in that thread I linked, T7 is crazy smart and crazy adaptive and crazy safe. Why screw with it using hacks?

I've also seen SMBCs on T7 lead to the engine running lean (since you'll make more boost in first and second without the ECU adding fuel to compensate), which can lead to melting pistons. Is the extra maybe 5hp in first and second really worth running that risk? I don't think so.
Can you show me a thread that posted a T7 running lean by using a SMBC? or melting a piston due to it?
I can show you a stock viggen thread , no mods blowing pistons...
An an ECU tune doesn't increase boost in 1st and second? not higher than a mildly set SMBC? You must be on crack. ECU tunes are typicaly running 10-15 psi in second. That is way higher than any SMBC can give you in those gears so that would not be a suitable arguement.
And a SMBC and an ECU are NOT in the same league nor do they compete for business. SMBC's are enough for some. Those who like the stock HP but want to bring the turbo on quicker. ECU's(and your $1200) are for big power. Do not lump SMBC's into the ECU category and try to compare them.
It's almost like saying...don't modify your saab. Save your money and buy a porsche. Silly.
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Old 07-30-2007, 10:28 AM   #15
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I would have to say that over the 3 years I have run a SMBC my pistons have never melted and I run my car very hard.
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Old 07-30-2007, 10:30 AM   #16
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I was running an SMBC, and had a bad MAF that gave me a lean reading on the dyno...

The lean condition and the SMBC are un-related.
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Old 07-30-2007, 10:42 AM   #17
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i run an MBC every day,, on my di/apc car, never had any issues, i just always pump premium, and watch the air/fuel guage,, which never goes anywhere towerds lean,,
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Old 07-30-2007, 11:19 AM   #18
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Thanks guys, I will buy one this weekend!!!
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Old 07-30-2007, 11:51 AM   #19
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Thanks guys, I will buy one this weekend!!!
Why wait 'til the weekend?

Buy it today, get it by this weekend
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Old 07-30-2007, 11:54 AM   #20
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Paycheck....
Also a long story, it will be installed in the weekend after next.
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