JLJ

im trying this again as the last post became about the X50 turbo option and then ireland and the BBC.....has anuone got a roadtest on the X51 motor option??? this is the motor package for the normally aspirated car not the turbo..or BBC..or ireland...

blustem

I agree, Jason. We want technical, not political darn it! -although they are right about Excellence.

dbelleperc

The math I did would be about 0-62 MPH in 4.6-4.7 Seconds and I just know that Porsche says it boost HP to 345.

Ed Newman

I have clocked mine with the Gtech at consistant 4.8 to 4.9 on the street. With warm tires on a real drag track with some rubber on the ground a 4.6 sounds very possible. The 0-60 is not where it is most impressive, its the second and third gear runs. The 0-120 is a full second faster than stock by PAG claims.

Jean-Marc

OK, here are the test numbers of Flat-6, all on 17" tires. On 18" you have to add time... About 1/2 sec per each number

100 to 200 kph (62 to 125 mph)
996 345HP 996 320HP 996 300HP
11.505 12.360 12.480

80 to 150 kph (50 to 94 mph)
996 345HP 996 320HP 996 300HP
6.608 6.582 6.893

from 80 to 120 kph (50 to 75 mph)
996 345HP 996 320HP 996 300HP
6th gear 9.049 8.499 9.942
5th gear 6.811 6.787 7.653
4th gear 5.801 5.495 6.109
3rd gear 4.363 4.116 4.752

The 345 hp test was done on a car with winter tires and outside temp of 8C

The 320 hp test was done on a car with standrad tires and outside temp of 23C

The 300 hp test was done on a car with standard tires and outside temp ranging between 5 and 10C

Bottom line, not worth it for day to day driving since car is actually slower than the regular 320HP version (which Porsche acknowledges also - all of these were factory cars tested in Germany) BUT on the track, it's a totally different story with the X51 beating the standard car by 1 full second on the 0 to 1000 metres test and .1 seconds on 0 to 62. So, given your use, you may want it or not... If it's for the street, not needed. If it's a Sunday track car, seems like a great deal BUT imagine how much suspension you can buy for $10K and that's worth a whole lot more than 1 sec....

FWIW JM

Jean-Marc

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by dbelleperc:
<strong>The math I did would be about 0-62 MPH in 4.6-4.7 Seconds and I just know that Porsche says it boost HP to 345.</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Flat 6's test shows 4.9 sec and 16.5 from 0 to 200kph (125 mph)

JLJ

if you have driven the standard car and the x51 back to back you would see there is a huuugge difference in speed and sound. they feel and sound like 2 different cars...it is worth it more than you can imagine

Palting

Those numbers from flat-6 seem to be the most objective so far. Too bad the cars were not tested in the same conditions, with the only change being the x51 option. There were several other variables that were not the same, unfortunately.

Despite that, with those numbers as well as from news releases from Porsche, I would agree with Jean-Marc's assesment. Not worth it for the day to day, significant improvement for the track. Since I seem to be using my car more and more on the track, I wish I was aware of the option when I ordered mine. But, again agreeing with Jean, I'm looking at suspension/tire/chassis improvements as value for money before I look at the X51 retrofit.

JLJ

doesnt seem like a good test considering the car had winter tires and it came out slower....more power =slower? strange

Palting

Not so strange, really. There is more HP, but the same torque. Torque is what drives those acceleration numbers. The torque band of the X51, from what I remember, moves up the rpm range and broadens the peak, but loses some at the low range and stays at the same peak.

It may seem strange that more HP=slower, it's not so strange if less low end torque=slower. At the track, where the rpm's are generally at 3k and up, the X51 would shine. On the street, where the rpms are generally less than 3k (or even idling!)for regular driving, not worth it and may even be detrimental. Again, this is just IMHO. It's as good as any, and could be as wrong as any.

Jean-Marc

</font><blockquote><font size="1" face="Verdana,Tahoma,Helvetica">quote:</font><hr /><font size="2" face="Verdana,Tahoma,Helvetica">Originally posted by Jason Jenkins:
<strong>doesnt seem like a good test considering the car had winter tires and it came out slower....more power =slower? strange</strong></font><hr /></blockquote><font size="2" face="Verdana,Tahoma,Helvetica">Look at what was tested: Flexibility = torque in one gear to move from speed A to B. That's real life performance and NOT race track performance where you are mostly at peak revs and therefore the X51 would always shine. They are 2 different cars. X51 is more like a Ferrari when you look at the torque band. Standard is in between that and a Jag...
JM

JLJ

all very interesting....my only experience is between my X51 and standard carrera 2...driving each you could hear and feel massive difference as was backed up by Gtek test driving it in toronto too. little around town drag racing of stock C2 showed X51 to be 2 car lengths ahead by half way thru 2nd gear and never behind in first. wish magazine would test them side by side.

Ed Newman

X51 with snow tires in the cold, std 996 with street tires in the summer and the X51. Does not seem like a fair comparison.

"Flat 6's test shows 4.9 sec and 16.5 from 0 to 200kph (125 mph)"... These are from PAG's press release, probably quite conservative.

We can simplify this all... I just need someone with a 320 hp C2 in NY Metro and we'll meet at Englishtown and get some professionally timed results. I think they open in late March or April... any takers?

Andreas.

Here's the dyno for the kit 345Hp compared to the 320Hp. :
<img src="http://boards.rennlist.com/upload/996345Hp.jpg" alt=" - " />

Ed Newman

Thats a factory spec. Example... I have a race motor in my boat. It is spec'd at 580 hp. Unlike PAG, the company that built it individually dynoes each motor to break it in and to tune it. The motor made 619 hp thats a full 7% higher. I am sure PAG rates their motors conservatively and I am sure there is a deviation from motor to motor. What we need is somone to actually get a 320 and a 345 on the dyno side by side and try to get a better comparison.