After long hours of research I went for The Fabspeed set up on my 2007 C4S TIP with 3000 Miles.
I chose the 997 MAXFLO Performance Mufflers, 997 Sport Catalytic Converter X-Pip, 997 Cold Air Kit and 997 BMC Air Filter. What a difference in weight it made that's for sure.
The Good...Love the sound of the exhaust especially when you really hammer it. Even my Ferrari buddies were impressed with the sound. They are quite when your just cruising through the neighborhood. Probably save 30-50 pounds off the rear.

The Bad... Now with almost 2000 miles on the exhaust and many phone calls to Fabspeed here is my problem...When Im not in sport mode in automatic the car has hesitation at take off. When Im in Manual sport mode there is no hesitation when taking off in first gear.
I think its because the tip cars start out in second gear when in automatic at lower RPM's and when in manual I start out in first the rpm's are higher! I have tried it every way and still can’t get rid of the hesitation in auto non sport mode. The low end Torque is just not there and the result is hesitation.
I have spoken to the guys at fabspeed and say they have never experienced any problem with there exhaust products like this before and that the problem is some oil on my mass air sensor.
They Tell me that the 997 BMC Air Filter from them sucked some oil on the Mass Air Filter Sensor and that would fix my problem. And I should reset my computer by haveing the battery disconnected for 15 min's
So I had Porsche do the clean and the computer reset.
The Results...unchanged...
So my only conclusion is that either the new 997 Sport Catalytic Converter X-Pipe is not for Tipp cars because of the low RPM take off or the Part has not been tested enough...All I know is this set up does not work correctley on my car. The car now has 4800 miles on it and while it sounds good the hesitation ruins it for me. Im having Porsche pull of Fabspeeds exhaust and install the POE.
Anyone else have this problem or could share some insight with me on this issue. I dropped almost 3G with fabspeed and am sick about the results. Im hopping fabspeed makes it right with me since I have only had these products for 2-3 months and started calling them almost immediately.

Thanks

Chad

 

I had a 07 Tip with Fabspeed mufflers and a BMC air filter with zero problems. Possibly your MAF is still dirty...lots of people way over oil these filters. Take the X pipe off and see if your car runs better....process of elimination.

 

From personal experience on chevy L98 and LS1 engines with MAF, oil could contaminate the heated sensor wire. There is a burn-off relay on the chevy V8's that heat the sensor wire to get rid of contaminants. Oil could also build up residue that CANNOT be burned off. Although I doubt on your car since you do not have the setup long.
Leave the filter out of the car on a desk top and see if any oil drains off the filter(over oiled). Leave it over night. Will sya this though, usually a contaminated MAF will show signs thru out the rpm range. not just on take off, so this might not ne the problem at all. DO what someone else recommended. Remove all the setup and install one at a time(I know a real pain) but is there any other option if you like the improvements?

 

Good idea I bet the x pipe has something to do with it. Ill keep you posted on the results. The BMC filter was very oily when I took it out of the box prior to installation. I have already replaced the filter with the stock one trying the process of elimination.

Thanks

 

If porsche is putting all of the stock stuff back on, let us know the results after the re-install!
It does not seem plausible that you would 'lose' enough low rpm torque to feel like 'hesitation'. I mean, even if the exhaust lost 20-40 ft/lbs of torque, there would still be a very ready 180 ft/lbs waiting for you! In a 3300 lbs car, it would move out just fine. A 'hesitation' implies something more serious than just the fabspeed gear. The MAF sensor is certainly plausible, as would any number of other electrical gremlins. Furthermore, the tranny being a 'slushbox' can have the viscous coupling slipping too.
Anyway, keep us posted on the swap!

 

Go to autozone, get MAF cleaner aerosol, carefully take MAF out (you`ll need secure bit to unscrew it), clean MAF properly.

Also disconnect battery for 15min+ to reset ECU. After you put MAF back and let it to dry up - drive car pretty hard for 30 miles or so and then check if this hesitation is gone or not. I think you may suffer from common syndrome when after new 200cell cat install ECU cannot re-learn to significantly changed parameters and that results in very dull ride.

 

Somehere I read to really reset the ECU you need to disconnect the battery for 3 hours.

I did this and my hesistation went away.

 

that 'reset' got rid of my 'part-throttle surging' too! Not a bad thing to try. I left my battery disconnected for a few hours...

 

Actually 5 min should be enough but some people suggest longer time 'to make sure' if ECU tables get erased.

 

Unplug the battery for a few hours, then drive it like you stole it so it learns that you want more throttle. Train it to give it to you. I think about 3 hrs is enough.

BUT: be sure not to close your hood! If you do, it won't open again since the battery is disconnected. Also, if you open your door, don't close it, as the window-lowering mechanism will be ineffective without battery power, and you'll jam the window against the seal.
CATTMAN

 

Catt,
Great heads up! I wasnt aware about the window thing!

 

She is running like a dream now. I think it was the X pipe that was giving me the trouble. Anyone using the 997 Sport Catalytic Converter X-Pipe?
I guess its a new product for Fabspeed?
Chad

 

Hi Chad, the problem you are incurring is not by the exhaust system but must be something else. I recommend disconnecting the battery for 30 minutes or so and if it is still hesitating, you may need some mass air flow sensor cleaner. There should be no reason why your car is hesitating when you hit the gas pedal after installing a performance exhaust. We have installed many of these setups and have not experienced any problems. Please let me know what happens when you do the cleaner, that should fix the problem.
Thanks

 

Dirty MAF? Intake Leak? Exhaust Clamp not tight? No hard reset?... There could be a number of issues causing the 'hesitation' you're refering to, However I've personally not had a problem with Fabspeed's new X-Pipe on Manuals or Tips. I'd say the chances of a problem during install are much higher than your car actually responding poorly to the Fabspeed system. Sounds like you've already pulled it off but from personal experience I've never had someone have the 'hesistation' you're noticing.