I have done the dyno run now.
OK, lets cut to the chase… The improvement is +12WHP (peak point +9WHP).
Oh well, I had hoped for better but that’s what it produces on my car which is not stock and has all the simple bolt on mods.
The details are: 06 Cayman S manual, de-snork, Milltek headers & Milltek Cat Back,
Evo V-flow filter, Snapflash and now the IPD
Plenum.
Of interest is the Torque improvement. On the way back to the office I noticed the change straight away. Butt dyno can definitely detect the change
. Have not done any serious driving yet but I can tell that the tires can really easily break loose now. Compared to when I first got the car I could barely get any wheel spin.
The Dynomometer type is a Dyno Dynamics. Operated in shootout mode / Porsche Cup mode. Basically you cant fudge any result in this mode and it is what is used for race car qualification. They also call it the “heartbreaker”. The Tech said "these dynos typically read lower than other model dynos because they are not corrected up", or something like that.
3 runs were done before the mods. Of this the last 2 runs were the same within 1HP.
After the install, the ECU had not adjusted itself yet and interestingly the power went to 294WHP! After that the next 2 runs produced the same power within 1WHP and the curve adjusted very slightly. The operator did not save those curves. I dont expect the ECU will push the power up over time. We could see it adjust initially and then it was pretty well solid after that.
Red is the before and blue is after. A small loss in torque at the very low end as predicted but overall a reasonable result considering a N/A engine.
Shown here is the car on the dyno.
Its been mentioned that the hose length may vary
. We had much difficulty trying to make it fit. It looked completely wrong. We cut the hose per the advise, then it was too short!! So the Hose needed modifying again. After close examination the angles are all wrong as well, even if the
Plenum was manipulated up or down. So after 3 hours of grunting and groaning we fabricated an adjustable adapter. Man 'o man. Ok I feel better now. Basically we cut the hose in half and inserted a length of steel tube. This allowed the length to be adjusted and the ends of the hose to be rotated plus the main angle could be tilted a bit. In addition, the metal tube insert will prevent the tube from collapsing. We compared it to one of those blue tubes and they are 2 or 3 times as stiff.
See below.
Now to give it some "what for".
