Kaylan’s dropping more teaser pieces into my inbox, and this one’s significant as it’s some quick video footage from the dyno run earlier today. The last photos of this car were featured here.
This time we’ve got some background info as well.
My tuner, Brian Macy at Horsepower Connection, has never worked with Saabs before, and in the beginning I sensed he had some doubts about just how much power/boost a stock Saab four cylinder motor could make. These guys are used to building high HP motors on cars with V8’s but also work a lot with tuning cars like Honda/BMW. Brian loves to turbocharge everything!
We all know what our beloved Saab motors are capable of, but also understand the doubts other people have of them. This afternoon, everyone’s doubts were quickly erased from their minds – and were replaced with huge grins on their faces!
With my fuel system fully installed (which included a 12 gallon ATL race cell, dual bosch 044 fuel pumps, stainless line front to back, TWM fuel pressure regulator, and 860cc flow matched injectors sitting in a custom fuel rail) we were ready for some tuning on my stand alone engine management system.
I drove my car around the shop and up onto the dyno. After wrestling with some wiring going to one injector the car was ready to tune. Brian nervously asked me one last time how much boost this motor can take as he puts the max boost at 30psi. (please not this is on a GT3571R turbo) “normally we run 6-8psi on things like this”. I assured him it would be fine. 🙂
On the first run he instructed Trevor (an employee) to wave his hands to stop Brian once we reached 12PSI on the dyno. By the time Trevor got his hands into the air my car happily hit 25PSI and put out roughly 370WHP. Pretty good right? Wrong!
Next run… roughly 439whp! It started misfiring at about 4500rpms. They pulled the plugs and I ran off to get some new ones. Plugs are very important in our cars when using the Direct Ignition! They were gapped and re-installed. We made a few more runs and finally hit 473whp, the boost kept falling from the previous three runs, but we were still making more power. One or two more runs should do it.
On the next run, water starts boiling out from my coolant overflow and my head gasket was toast!
The loss of boost in the previous runs should have told us something but we were all too caught up to notice. Either way, with tuning left to be done and 476whp results already you aren’t going to hear any complaints from this girl!
My car has 109,000 miles on it now with a stock head gasket so it was time to be replaced anyways. I’m sure it was a ticking bomb to begin with! I’m very happy with the results and I hope you enjoyed the short (yet very sweet) videos.
Please keep in mind my motor is 100% factory Trollhattan lovin’.
And it’s getting a lot of loving from Trollhattan…….
I hope we can do a full feature on this car soon. We need some full appreciation of everything that’s been done to this Saab in 2007. There’s a LOT to be told.
Click to enlarge.