Interesting testing done today.
We released our Pro Catch can a month or so ago. The sales have been very good. One thing I wanted to do was some real back to back dyno testing to see if power could be gained on an FBO car.
Today I had a customer come in who's car we built to a BR140. It doesn't have our catback on it but the balance of the car is Buschur Racing, (BR)140.
First thing we did when Joe arrived today was to load it on the dyno to check to make sure the tune was still in check from the last time I touched it and get a good base number for today. I made two pulls, boost on the stock turbos is maxed out over 5600 rpm. Mid range the boost was hitting 19.25 psi and by 7000 rpm in 4th gear it had fallen off to 14.07 psi.
The car was here for our lightweight battery kit, coolant tank and the Pro Catch can. The only part there possible of adding any change in power was the Pro Catch can.
Base line dyno and logs showed the timing right on the edge of where it needed to be with minor correction.
We added the parts, loaded the car back on the dyno and started again.
Now, something to add. I logged the crank case pressure before adding the catch can. The design of our new Pro Can uses the oil cap as a vent so I could not log the crank case pressure again as there is a fitting in the way. (I'll have to make something else for doing this) The crank case pressure with the stock set up hit .6 psi.
The addition of the Pro Can dropped the actual boost in the car, peak stayed at 19.25 psi but at redline the boost wouldn't go over 13.6 psi. In my own car this same thing happened, I was seeing 4 psi+ of pressure in the crank case and after adding the Pro Can it dropped to 0 and the boost dropped I was seeing also.
Power went up much more than I thought. YES, the car was tuned further but before the catch can the car was seeing some minor knock corrections and after it was gone. AFR's and peak boost remained the same while the peak boost dropped about .67 psi. (Interestingly enough the same amount of crank case pressure it has prior to the Pro Can).
Power went up 24 whp and 22 ft lbs when it was all said and done and to be honest, I believe I could have squeezed a little more out of it. The engine, heads, cams are stock and Joe road races the car so I decided that would be enough.
The power was increased from 2500-7100 rpm.