CP

Just an observation for RUF-modified engines. I guess regular 993 3.6L engines are twin-plugs. My RUF BTR is single plug. RUF plugged up the holes where the other plugs normally go. Viperbob has my engine all apart so this is without a doubt. We saw it with our own eyes. Don't ask me why, as I have no technical answer. Guess may be something to do with the fact that the BTR only runs a compression of 8.4:1.

Now onto the point of RUF almost like deity. I'm also surprised that not more people (especially RListers here as we are so passionate about our cars) have RUF cars (originals or conversions). I agree that there are other tuners (FVD, TechArt, Manthey etc.) who claims higher power/torque outputs. But RUF goes beyond pure power. While Adam's posts show that RUF is definitely no slouch in the acceleration department, their cars are balanced engineering systems, and all well known for their durability. I do not know if any other tuners can show the same durability in their products. I certainly don't know of any other tuners with their own transmissions built and geared to optimize the engine's power band.

I firmly believe that RUF is in a class unto themselves. And blistering performance is only a portion of their overall superior package

After my BTR gets put back together, I'll have someone help me run some 60-130 times for this post .

CP

911/Q45

It seems like there are several variables here. First would be the speed of the shifts. Second would be the number of shifts, depending on gearing and redline of the different setups.

Jean

Ok I timed my 965, and got around 10 seconds, could be 10.1 or 9.9 more or less as the video was not clear enough.

Bill S.

Yes. That's all part of acceleration runs. The video tells if the shifts were particularly slow or the gearing was unusual. Usually, these are not big issues for a 60 to 130.

Other tests have more variables, expecially when starts and throttle response get involved.

Bill S.

Thanks for sharing. Faster than a stock 993TT. What type of engine and how much does it weigh?

Jean

The engine has an output of 450-460 hp, maxxed out on the K Jetronic I guess, it is a 6 speed gearbox. Stock weight. I was surprised as I noticed RPM drops of around 1200 only between shifts on the video. All the specs and pictures are on the 911 turbo forum right now as I put it up for sale. https://rennlist.com/forums/911-turbo-930-forum/174115-fs-ad-great-deal-on-a-special-3-6-turbo.html

Edit: It is not stock weight as it has the 4WD! Here is the real Weight (full tank, no driver): Front 1344.8 Lbs Rear 2,090 Total: 3434.8 Lbs.

JJayB

Sat. 12-11-04 zero dark thirty, proceeded to test. Dead batttery. Put on charger for an hour, forgot to turn off motorola two way radio which drained battery.

Warmed up engine and waited for a clear run. Lot trickier than I thought, trying to time and shift. Ran three times with a average of 7.4 seconds. Car felt like it hit a wall at 120 mph, and then I remembered that the rear wing was set at full downforce from my last track event. I'll try again tomorrow with minimal downforce.

Sunday 12-12-04. Heavy fog and mist, temp. 51 deg. F. Perfect turbo weather. The motor is making some big power. I could feel it in my warm up. Bring on the Enzo. I let out the clutch and nailed the throttle at 20 mph and it was all wheel spin and shifted into second more wheel spin. The mist that was helping me make power was killing my traction. Mother nature had intervened. The fog had become worse. I waited an hour to know avail, citizen in mini vans were now flooding the tole road. I try agian in two weeks.

Bill S.

Thanks for measuring Jim! I knew that Andial 3.8 was fast, and probably even faster. Were you using 91 octane on both days?

Konstantin

hello
This is the test that I sugest for years now. not the big HP and a lot of (un)real RWHP counts. the real world performance counts.
the only problem is that you get not a corect reading of the speedo.
If you have something like the AP22 or motec or 2D dataloging or another acurate device then you cna accurate do this messurment
In Europe we stop the time from 100 to 200 kmh (62,5-125 mph)
here are the times

these are 100% right
911 3.8L RSR 12,3
968 Turbo S 11.9 sec
964 3.6 L Turbo ( factory tuned at 0.93 bar boost) 10,4 sec
buggati EB 110 10,4 sec
F 355 11,5 sec
993 TT 10,8 sec
Mc Laren F1 6 sec

Heavily tuned 968 Turbo (RS) 7.95 sec (at 40 degree celsius)
Viper SRT 10 (505 HP) 9,5 sec
GT3 RS 9,3 sec (factory car with more HP)
911 GT1 6,6 sec
Tech art 996 TT 530 hp 8,5 sec
Carrera GT 6,4 sec

all these numbers show the Power of the car and the accelaration but says nothing about the track time. (Carrera GT leads the track time on every test)

Konstantin

LAT

Kontantin,

thank you for the information, nice list, unfortunately not a Ruf on it. Feel free to add more if you have them.

LAT

Konstantin

RUF CTR yellow bird
6,5 sec (RUF claimed 5.3 sec)

Konstantin

Jean

Konstantin

As I was mentioning on the other thread, There is something that does not sound right in the 993TT vs 964T numbers. Do you have more info on the state of tune and hp output of the 964T?

Am I right in assuming that this acceleration run does not take into consideration differences in gear ratios, therefore it is not only power being measured? This is the only thing I can think of that would put the modded 964T so close to the 993TT, unless the TT was not stock.

What is your POV?
Thanks

Fastest928

CP,
RUF applies system level engineering to their vehicles. Your engine was designed as a sub-system in itself, rather than a bunch of "hot-rod" parts bolted together. Ross, the master tech doing the work on your engine, has had many communications with RUF on the specifics and the differences between the RUf designed engine and a standard turbo.

In my opinion, there is a reason why Porsche RUF to VIM vehicles....they share the same engineering based approaches and design philosophy.

There is only one other Porsche in Open Road Racing to ever acheive a verified over 200 mph speed, other than ourselves (M Thomas/S. Thomas), and that is a RUF (R. Roth/Metcalf)! And together, we are the only two daily drivers that have ever made the ranks!

http://www.openroadracing.com/html/200_mph_club.html

Happy Holidays to all!

Konstantin

The 964 3.6L has less weight more boost. Both have same displasment.
so the tuned 964 same HP as the 993TT but with the weight and gearing advadage is fast enough. A 993TT with the same mods need 8.5 sec and has 520 HP

the RUF CTR2 needs 8 sec
Gearing is not considering. These are the raw accelaration numbers

Konstantin

CP

Marc,

Thanks for the education. Amazing what one can learn from the technical experts on this board.

CP