Saab Link Forums banner
1 - 18 of 18 Posts

·
Registered
Joined
·
22 Posts
Discussion Starter · #1 ·
I keep reading about people with 2.0lpt's on this forum smoking cars, but I can't even smoke an automatic ford escort (from standstill, only went up to 60 maybe)!!!! Are the new 9-5's super heavy compared to the old ones or what? Having linear + auto doesnt help much either..
 

·
Registered
Joined
·
475 Posts
It's not that the car is super heavy, it's just that your engine is lacking power. Breathing modifications (exhaust, intake, downpipe, turbo) will help with responsiveness and midrange power without the need for new software but of course new software is going to maximize your power. The good news is that the 2.0L can handle lots of power. The bad news is that the automatic transmission can't. Up to 250-270hp should be ok for the autobox.
 

·
Registered
Joined
·
475 Posts
SMBC will give little to no benefit with the autobox (not sure why) vs. the manual which will clamp that wastegate shut and force as much air as you can dial through your partially opened throttle body. Whats wrong with a little high boost knocking anyway? Just because one of your pistons is cracked doesnt mean you are always going to chop up the block also. :roll:
 

·
Registered
Joined
·
556 Posts
I dont know, my dad had an 03' linear for a while, all is what I can say is what a dog. My moms 97 cse with 150k on the odo was a hell of a lot quicker. I was hoping it was just a flaw in that one car.
 

·
Registered
Joined
·
3,976 Posts
xaamottomaax said:
SMBC will give little to no benefit with the autobox (not sure why) vs. the manual which will clamp that wastegate shut and force as much air as you can dial through your partially opened throttle body. Whats wrong with a little high boost knocking anyway? Just because one of your pistons is cracked doesnt mean you are always going to chop up the block also. :roll:
i beg to differ with you on the use of an SMBC. My 9-3 SE AUTOBOX dropped .3 seconds in a 1/4 mile and dropped my 60 foot time from 2.01 to 1.95 (all measured by a GtechPRo). When I took it out sure enough after an ECU reset the times went right back up to where they were prior to the SMBC install. I still believe the T7 will adapt to a plus or minus 20% from the stock HP figures called out by SAAB. The point of the SMBC is not to dial up boost but to mearly even it out in 1st and 2nd on the car. It is proven that you will trip a CEL by dialing up the boost on an SMBC over the stock levels. Now tell me how you can say that you will be forcing more air through a partially closed TB when you are not bringing the boost levels above the stock levels???? I believe you are refering to a MBC+A rather than an SMBC. And for high boost knock my car ran perfectly stoich to rich with the SMBC installed as well by using my friends Digimon to watch the mixture and sensor readings. So I am not sure why you think that high boost knock would occur???
 

·
Registered
Joined
·
475 Posts
It is proven that you will trip a CEL by dialing up the boost on an SMBC over the stock levels.
Incorrect.

In my 2003 Aero MT I dialed up enough boost to pin the needle to the back of the red with no CEL or limp home issues (only done once to see if CEL would occur). In my 2000 Aero AT however, there was no ability to increase boost without CEL or limp home issues. Perhaps you are running a performance ECU that has higher boost tolerances in your automatic similar to the overboost tolerance in MT B235R T7 applications?

The point of the SMBC is not to dial up boost but to mearly even it out in 1st and 2nd on the car.
Even what out? Even the boost out in 1st and 2nd with the boost levels in the higher gears? Well boost is limited in 1st and 2nd so if you are "evening" the boost then you are increasing the boost.

Now tell me how you can say that you will be forcing more air through a partially closed TB when you are not bringing the boost levels above the stock levels????
Well now that we see the boost levels ARE above stock levels even if only in the first two gears (assuming we arent dealing with a greedy boost whore here), let's get to the real issue at hand. This "device" is pitched to the average Joe as a super simple anyone can handle it DIY. And when referring to the installation, this is true. BUT, tuning the device is a hit and miss process that involves adjusting, driving, adjusting, driving, and it is very easy to adjust "too much". This device is designed to TRICK your ECU into keeping the WG shut when it would normally have the BPC valve open the WG. This is a very risky proposition. T7 is a very complex system that is constantly adjusting itself to keep the car performing while maintaining boost control and knock prevention for the safety of the engine. The boost increase in 1st and 2nd is not expected and the mechanical TB is not adjusted accordingly because the ECU doesnt really know what is going on. Push it too far and you are asking for disaster. Similar to the burning sensation Mr.Dobsi feels everytime he takes a piss. At least he can laugh about it too. :lol:
 

·
Registered
Joined
·
3,976 Posts
I am not trying to dispute the use of an SMBC or not to use one I am simply saying that I got results from mine. I was holding boost longer and steadier in all gears on my autobox with one installed. Why you did not see the same results on your 2002 who knows??? I really could not tell you why this happens. The T7 has set ranges of operation and is limited to around 15PSI of boost max so if you don't go past that then you arent pushing past stock levels. But like I said I do not want to argue the point I am mearley relating my experiences about using one on my car and thats all.

So lets agree to disagree here. :lol:
 

·
Registered
Joined
·
461 Posts
I know how we can settle this easily. Everyone give me money and I will buy a 300 dollar Greedy Electronic MBC. I will then increase the boost 1 psi at a time and tell you all when the engine light comes on and the car goes into "limp moide" or feul cuts.

SO if you are interested PM me for my pay pal account K? :D
 

·
Registered
Joined
·
3,976 Posts
Osiris said:
I know how we can settle this easily. Everyone give me money and I will buy a 300 dollar Greedy Electronic MBC. I will then increase the boost 1 psi at a time and tell you all when the engine light comes on and the car goes into "limp moide" or feul cuts.

SO if you are interested PM me for my pay pal account K? :D
Enough with the free ride here!!! What are you a starving student or something!!! LOL!!! :lol:
 

·
Registered
Joined
·
461 Posts
Yes I am a starving student. Almost out of college so I can go into the real world and be poor there too.

PM for the donations...its tax time and donations are deductalbe :wink:
 

·
Registered
Joined
·
22 Posts
Discussion Starter · #14 ·
I was kinda surprised cuz a Camaro SS was pulling on me just a little more than slightly (from a rolling start)...and my engine wasn't fully warmed with my only mod being an intake filter. I'd love that ECU but $500 to change my only ECU isn't too safe of an investment for me...this is the only car i got in california so it has to run. downpipe and exhaust would be nice too.....

and i don't have the 2.0L 4spd auto, i got the 2.3L 5spd auto :? .....only if it were a stick
 

·
Registered
Joined
·
22 Posts
Discussion Starter · #16 ·
oh i completely took out my air box, all that is there is a metal pipe and cone filter, sucked up water and stalled during the rains a little while back too
 

·
Registered
Joined
·
461 Posts
Very odd. I took our my airbox and replaced it with a cone filter... how low is your intake to the ground? I have new had a problem with it stalling during the rain.
 

·
Registered
Joined
·
22 Posts
Discussion Starter · #18 ·
it's not that low, but it was POURING in southern california a few weeks ago (i'm from michigan and i've seen it rain hard before), that and i was going real fast through deep puddles and forgot about my intake :oops:

it started up a few minutes later so it was fine
 
1 - 18 of 18 Posts
Top