LAT

Konstantin

on the RUF cars, the CTR vs the CTR-2, the difference is over 20% in acceleration acording to your info. Yet the CTR-2 has at least 10% more horsepower, (520 vs 469), it has over 20% more torque (505 vs 408) and the two cars are almost the same weight, what happened?

Puzzled

LT

TB993tt

CTR weighs 1226kg wet (I weighed one) and with its variable boost control (old fashioned **** between the seats) can dial up over 500PS @ 1.2bar - the 469 is at lower boost and for homologation purposes I understood. The CTR2 weighs what...? 1380kg ? probably more like 1400kg wet (has anyone weighed one ?) and would make little more than the quoted 520PS.

TB993tt

I've heard it all now

TB993tt

Jean
Am I right in saying the 964T reffered to is the Turbo S lightweight. Paul Frere's book says it weighs 1290kg full of fuel and give sthe following acceleration numbers:
0-100kph 4.7s
0-160kph 9.2s
0-200kph 14.2s
381PS @6000rpm and 490NM @4800rpm
The cr@p 0-100kph is 'cos of the lag in winding up those 'ole K27s with the big hot housings but once moving its 290hp/tonne makes itself felt

JJayB

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

Bill, 91 on Sat. Added 4 gallons of VP 100 with what I had in the tank. (approx. 5 gal.) for my aborted Sunday run. I can't wait till somone brings out an CGT for a track day and we can forget all this timed stuff and go head to head.

Bill S.

The timed stuff is just to compare acceleration performance, and doesn't require much skill. At WS, you'll probably beat the CGT driving your Mercedes.

Konstantin

the CTR2 weights25% more and has more Drag area (it is bigger) The aerodynamic of the CTR is very good and the 469 HP are just on the paper. It hit 342,8 km/h at Nardo and caculation showed that it had for sure over 500 HP :-))
A "good going" CTR has at least as much HP as the CTR2 but weights 25% less and has a smaller body and better Cd values.
Thats makes teh difference

Konstantin
oh and I think the gear box is different too.

LAT

Bad math, but I can accept the drag area issue, (1400 to 1226) is 14% not 25%, the narrow body CTR-2 is capabable of the same top speed as the CTR.
I still think something is not right with your Ruf numbers.

Konstantin

it is 1450 vs 1160 kg.
the car are weigtetd by a german magazine when the made the tetst. in 1988 and 2 years ago.
we weighteted the original Yellow bird and it was 1180 kg..
these are number either testetd by me or by the biggets magazine in Germany and Europe
weight to power is 2,52 for the 469 HP CTR and 2,79 for the CTR2.
togehtehr with the bigger front area makes a big difference at 200 km/h.
imagine the CTR had over 500 HP ( at least the one in the test) so it is about 2,27kg/HP VS 2,72kg/HP
The CTR2 needs 17% more power and a betetr aerodynamic to much the accelaration of the test CTR (with 520 HP)

Konstantin
PS anyone is interest in the whole test of teh CTR? all data from 0-200 km etc etc
PS2 at the same test a factory tuned 959 with bigger Turbos from 944 Turbo and 520 HP was slower than the RUF CTR it made only 339 km/h

Jean

Konstantin,

Great information as usual. I am certainly interested in the CTR test, also any other that you might have on tuner 993TTs or the CTR2. Please feel free to email them to me if you don't mind.

The stock CTR2 ratios are as follows according to my source:
RUF CTR2: 3.15 1.79 1.27 0.97 0.76 0.60

TB, yes I guess the 964T K. was referring to is the Turbo S with 381hp, I thought it would be a higher output engine, that's why I found it surprising that it does not beat the 993TT.

Does anyone recognize that 200MPH organisation that was discussed above? It does not mean much to me as an official body???

AdamT

Ours was dynoed and had 522bhp,
@1.1 bar, it goes up to 1.2 though....

all the best
adam

LAT

Adam, which one the R or the CTR?

LAT

Konstantin,
here are some 1/4 mile et. & mph.

from R&T june 04
CGT 11.3 131.6,
F1 11.6 125.0,
Enzo 11.1 133.0,

from R&T february 97,
CTR-2 11.4 133.7.

Yet you claim the CTR-2 is 1.5 seconds slower from 100-200kph, where does it catch the CGT and and pass the F1?

What I believe is that you don't like Ruf and or his products and take pleasure in discreting them.

LT

Jean

" What I believe is that you don't like Ruf and or his products and take pleasure in discreting them."

LAT

I don't see where Konstantin is trying to discredit RUF. Rather I can see where you try to discredit his data in a couple of threads above.

I see him being very objective with the numbers and implying that the CTR is a hell of a car. Over the years his team has probably built and tested more Porsche race cars in Germany than any of us have ever seen. One of his GT3 CUP babies was the winner of the championship in 2004, and the fastest GT3 in Germany on the road today is also one of his works.

I am no one to defend him but why make an attack on someone who shared just his numbers and opinion.

TB993tt

That CTR2 was for sure not a "standard" one - maybe one of the original twin plug TAG ones referred to before, depending on the actual weight of that particular CTR2 that sort of 1/4mile in a 993tt looks more like 540 (Ruf)hp to me.
Where is the discrediting ? this is all good information, some coming from owners,previous owners and others with hands on experience testing Rufs - not some sycophantic drivel