is it possible to...

[mikehazard]

put a blowoff and ECU upgrade on my 03 saab 93, everyone continuously tells me bad idea bad idea tuning problems computer problems etc etc...thoughts?

[Celtic1982citleC]

Its a bad idea to put an atmospheric bov on the saab, yes. You would need to buy a recirculating "diverter valve". the Saab requires that the air not be dumped into the atmosphere, it misses it when it goes bye bye and makes your ecu angry. hope this helps

[1320ride]

basically every time the blowoff valve actuates its dumping metered air from the mass air flow sensor to atmosphere. the ecu doesnt realize this and is already sending enough fuel to the cylinders for the air thats escaped. this will result in an "instant rich" condition. unless u convert your engine management to MAP based tuning leave the stock bypass valve in place

[Shawn96VR-4]

Everyone seems to have an opinion on this. I always thought the open atmosphere is bad (dumping metered air; valuable spool, etc..) but it seems like a lot of the stronger BOV are open or perhaps that's my perception.

I never had any issues with stalling or driveability between shifts while those with the Turbo XS RFL in my platform seem to do.

I'd stick with closed loop just to not deal with any bad issues that might arise from open loop. Most importantly, the BOV should hold boost and not give compressor surge.

[mikecentola]

It's generally a bad idea to run atm bov unless you have engine management and/or have converted to a MAP based system.

[slwrthnu]

Originally Posted by mikecentola

It's generally a bad idea to run atm bov unless you have engine management and/or have converted to a MAP based system.

or have a jdm genIII engine

[JiM P 2001]

i saab blew off at me the other day driving down rt4 going to work... I will race him. He will lose. lol

I don't know if I heard it thru his intake or if it was atm, but it was loud.

[crazybrew609]

i heard him to... i was wondering the same thing.. i was in limp mode when he passed me.. i prolly would of tried as well

[Shawn96VR-4]

Originally Posted by crazybrew609

i was in limp mode

[xceebeex]

Originally Posted by JiM P 2001

I don't know if I heard it thru his intake or if it was atm, but it was loud.

The intake that I had in the S40 was very loud. It definitely sounded like a blow off valve.

[crazybrew609]

ask mike about my cars limp mode.. if i get it at WOT i lose 2 cylinders and i'm not allowed to go into boost and i also can't go above 3k rpms... it's pretty awsome..

[19Cutlass94]

Now you know how I feel just driving my car every day haha