TB993tt

The discussions regarding Jussi's amazing 0-300kph time prompted me to dig out this article on a 993GT2 EVO.
The article says it is one of 7 Clubsports.
The car was prepared by Dag Von Garrel and Freisinger and the engine was built to EVO spec by RS Tuning in June 1999 with a full house twin plug Secan engine which was rated on the RS dyno at 613hp @ 6060rpm and 820NM @4040rpm.
(The owner had the car dynoed on his own dyno at 631hp @ 5960 and 836NM - run-in or Porsche hp ?)

The bit that stood out for me was that at 8700miles the owner had replaced the following "usage" parts: Rods and bearings, piston rings, cylinders and intake valves and interestingly RS stipulated a valve timing adjustment and oil and filter changes every 2 hours track usage !!

The only unknown about 600+Porsche hp engines is how many "street" miles one can do before major maintenance......

Felix

I wonder if this is the same car? http://www.florentmoulin.com/fiche.php?num=157&langue=2 Certainly sounds similar.

dbf73

what kind of revs are the GT2 engines like this one being turned to?

TB993tt

Some of the dates are a bit off but there can't be many of the "7" this colour ?
I think 7000-7200rpm was the limit, I remember being showed an engine dyno sheet for this spec motor and the power curve between 5000 and 7000 was a pretty wavey affair varying between 590 and the 620/30 hp, I was told that the ups and downs could not really be detected whilst driving at WOT

clubsport1

Not sure where this 7 comes from, I understood there were 20-21 CS made ??

Acropora

That's not many miles between rebuilds if it's street usage. Sounds reasonable if it's track usage. I wonder about the heads as well. Jimmy mentioned something about them having limited heat cycles which would be $$.

Woodster

What a machine!!

The ultimate road going Porsche ever.

MK

Stummel

I have read the text from the add somewhere else before.

How can he get 600 RS HP for 20k€ if he was coming from a 430hp street GT2???

No internals done?

The add states IC and turbos plus obviously Motronic. That is not good for 600hp, is it?

graeme36s

It does look like the same car. Intercooler, wheels, cage etc. I thought the GT2 evo engines were modified (heads only) for a reliable 600bhp to run in the GT1 class prior to the GT1 making its appearance. Agreed the club sport issue over comfort is very vague and 20 ish does not look unrealistic 7 is rubbish. I have just finally got mine a 98 GT2 EVO comfort spec. As I reckon she has not done much mileage in the last few years I am going to be a little gentle and bed her back in. (bloody hard work resisting temptation though). Tuning is going to be restricted to maybe the ECU only.

JJayB

TB,
A couple of thought regarding how long will a 600 hp last on the street, and a lot depends on how you drive it and how its built.
First, if one runs the solid lifter cam, I believe has more seat pressure and is likely to have valve spring issues on the street with any higher mileage due to the prolonged heat and tension.
Second, the heads with increased heat will loose their hardness and you have sealing issues. That's why the race 993GT2 threw away the heads at 40 hours for the recommeded top end rebuild.

I'm somewhat puzzled that the motor needed new rods, unless they were the stock factory jobs. The bottom end with Carrillo rods should be good to 900 NM torque.

Andial tested the 3.8 conversion and believed that 10,000 track miles was over 100k street miles. When my engine was disassembled, the bottom end was perfect. Only issue was one head showed 12% on a leakdown but the hardness of the three of the heads had been weakend from the constant heating and cooling and was out of spec. Guess the factory knew what they were doing on the race rebuild.

Jussi

TB: can you publish those story pictures in bigger version?

TB993tt

The 20K was just for the intercooler I think. The engine had the full house RST EVO jobbie of the day done to it....
Jussi, sorry no bigger version, I was just giving a taster, the salient points are what I have mentioned.

JJay - you may be right about the rods, I don't think the main teams adopted the Carrillo's until later into the development ? They used a different rod to the stock 993tt but obviously not up to the task. My original engine being a '95 build car had the "special" GT2 rods in so RS Tuning in the first build did not change them (that was late '99) as they were deemed "best available" - they bent at some stage afterwards with ~750NM going through them. I had the enegine rebuilt in the UK in ~2001 and Carrillos were fitted. RS "got over" the fact they had to buy some components from the US at some time in between and by 2001 were also using Carrillos

WHB Porsche

Thanks for the pictures, TB. That car looks thoroughly ferocious.

Graeme, you are the envy of the 993TT board.

Jean

I had translated the text sometime back but I am on the move and don't have access to it. What this is saying in a nutshell is that this Clubsport version (7 of them were made, these were about 100Kgs lighter than the comfort GT2 including a rollcage) had been modified by Freisinger initially (who is one of the most experienced 993GT2 racing teams in the world and authors of many improvements made by Porsche to the GT2 EVO in its final form) to a state of the art condition with all the original GT2 components. Reinhold later did some of his upgrades to it such as twin plugging the GT2 heads, changing the engine management system to become a MAP system using Bosch 5.2, installed the Secan intercooler, and larger latest generation KKK EVO turbos.

What TB mentioned above also, concerning the maintenance on this engine.

Here are a couple of pictures of a GT2 EVO "R" engine with the Mahle pistons and Carillo rods, also upgraded oil pump.

TB993tt

Here are the special Porsche rods I was reffering to. Out of the 2001 FVD catalogue. They were fitted to GT2s and early build 993tts - like I said they bent in my engine and seems also in the one above -Carrillo showed the way forward....