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How much power can I expect at the wheel from the full fabspeed performance package? That's the maxflo, ecu and sportcat all together. I know what they claim but have guys actually seen on the dyno?
How about the ecu upgrade alone? The maxflo alone?
Thanks - wondering which bits give me the most bang for my buck.
I had toyed with the prospect of fabbing my own X-pipe. My self along with Mike J, we're trying to see of a way to make an effective/efficient/ worthwhile system. I have since decided not to waste any time on the effort. An industry expert advised me that there would be NO gain and the effort would be a waste. Without a full sized mixing chamber, the presently available "X-pipes" offer no gain in power or efficiency. I knew just from the size of the cross over that the currently available systems, could not offer any gains, and possibly would yield a loss of power. There's just not enough area to let both banks blend efficiently. Save your money on proven items.
How many advertisements have you seen boasting numbers of gains?
Like to see an independent test. Losing the cats, yes (of coarse). It's the X-pipe that I am not sold on. Just not enough area.
I have zero dyno charts to validate anything I have done, but I played around with my exhaust A LOT.
I tried 2.50" tubing with an x-pipe, and 2.25" tubing with and without x-pipes and several different muffler and catalytic converter combinations.
The 2.50" tubing with X-Pipe suffered a noticeable loss of low end torque, which I didn't care much for. The sound was also just not what I was looking for, it made my Porsche sound like a Mustang (coupled with 200 cell metallic cats and aftermarket mufflers).
The 2.25" pipes brought the low end torque back (stock is about 2 1/8"), but I still wasn't a fan of the x-pipe. There is a lot of debate about whether or not they help... engine timing, exhaust pulses etc. If you take apart a 1995 catalytic converter you will find that there is a plate in there to keep the two banks separate...
I ended up with a modified stock muffler (like Fister II's I think...) and the 2.25" tubing with separated banks and 100 cell cats. I like the sound, but it's very much about personal preference.
Power increase over stock? Maybe a little, but it's all about the sound!
Is this another veiled, "Porsche engineers aren't as smart as I am" post?
As I have mentioned before, I don't understand why Porsche doesn't recruit engineers from this forum; such knowledge, such talent!
[maybe the starting salary ain't so good!]
I have zero dyno charts to validate anything I have done, but I played around with my exhaust A LOT.
I tried 2.50" tubing with an x-pipe, and 2.25" tubing with and without x-pipes and several different muffler and catalytic converter combinations.
The 2.50" tubing with X-Pipe suffered a noticeable loss of low end torque, which I didn't care much for. The sound was also just not what I was looking for, it made my Porsche sound like a Mustang (coupled with 200 cell metallic cats and aftermarket mufflers).
The 2.25" pipes brought the low end torque back (stock is about 2 1/8"), but I still wasn't a fan of the x-pipe. There is a lot of debate about whether or not they help... engine timing, exhaust pulses etc. If you take apart a 1995 catalytic converter you will find that there is a plate in there to keep the two banks separate...
I ended up with a modified stock muffler (like Fister II's I think...) and the 2.25" tubing with separated banks and 100 cell cats. I like the sound, but it's very much about personal preference.
Power increase over stock? Maybe a little, but it's all about the sound!
That's what I was getting at. Surely, the cats are restrictive and removal will be of benefit. The X pipe, in the currently available versions, is doubtful to have any benefit other than smoothing the pulse (sound) at idle.
Is this another veiled, "Porsche engineers aren't as smart as I am" post?
As I have mentioned before, I don't understand why Porsche doesn't recruit engineers from this forum; such knowledge, such talent!
[maybe the starting salary ain't so good!]
Let the hating start - I don't care.
Well, don't forget that Porsche engineers have to abide by noise, emissions and other pesky laws. They also need to make a driveable car that would suit majority of buyers. In other words, they are designing a compromise.
If an individual or a company decided to forego the above laws and compromises, a lot can be done above and beyond what Porsche engineers designed. Look at the deft use of Monroe shocks with SUV-height springs. Surely this is the pinnacle of suspension tuning designed by German engineers and can not be further improved by people with a clue of what they want out of their car's suspension and why.
Having said that, I believe that most mods are done on a lemming principle. But that's another issue, unrelated to the engineering point you made.
PS. Porsche engineers can't properly design plastic or electrical parts. Is that news to anyone? And, oh, there's been _some_ engineering advances in the past 20 years, y'now.
Not only that, but Porsche engineers developed the great motors that came with the 996. The GT3's that caught fire, causing a total recall. Thermal reactors, etc.
They build great cars mostly, but do have to sacrifice to meets regs, and don't ways get it right or perfect.
05-22-2015, 01:06 AM
Fabspeed package power - reality?
