Bradford

Wouldn't those settings be based on the octane you are running? So in order for you to have access to all of those HP levels, you have to run race gas? If you are running 93 octane would you ever see 620 or 725 HP?

Tuner1

Yes.

No, at least not for long

LAT

This goes back to the discussion that 510-530 HP is all that can safely be achieved on 93 octane pump gas.

Therefore would you not agree that you are where the rest of us are on pump gas, except Toby who produces 577 HP on pump.

biiig-hp

I'm at 650 on pump @.8 bar. I'm sure other people have some intersting numbers as well.

LAT

Can you post your dyno sheet from the engine dyno?
Thanks.

Tuner1

Hi LAT,

I am not sure I agree that an air-cooled 3.8L twin turbo Porsche flat fix with all the right parts and tuning can't make more than 530hp (crank SAE HP) on 93 octane and still survive.

Unfortunately we will never been able to agree on a reasonable real world test to prove the various theories and if an engine were to fail while putting out over 530hp where would we point the finger? Wrong oil used? IATs too high? Mixture too lean? Timing too far advanced (detonation) or retarded (high EGTs)? Incorrect bearing clearances? Weak piston or ring design? The list goes on and on.

One thing that we should be able to agree on is the turbocharger's influence on IATs. I guarantee that some type of K16 variant spinning hard enough to make 530hp will produce a lot more heat out of the compressor (IAT) than a GT3076 or GT35XX would. This will change how much heat the intercooler is required to cope with in the first place. A nice GT40XX churning away at 10psi won't create much heat

In regards to how many "hours" one of these engines will last, I find it pointless to give a number (I think someone said 18hrs for a GT2 Evo race 3.8) without using a factory car as a baseline reference. How long would a stock 993TT or 997 GT2 engine last under the same race conditions?

The famous black GT2 recreation - taken from the ebay listing: "Engine is Andial built 3.8 liter twin plug with 571 hp on street gas. Turbos are GT2 K24’s and the intercooler has been increased in height. Additional front oil cooler as well. Engine meets CA emissions. This car is one of the famous 20 cars with the Andial 3.8 litre conversion and is listed in the respective registry."
One would have to assume this power is achieved is on California (weak) 91 octane.

Wilder

Yes, I do. Unfortunately, I don't remember the build specs but I know who built it. IIRC, the car was dyno'd at ~850HP crank on race gas.

Tuner1

What a tease Please tell us what you do remember

Is this car still around?

Wilder

The car was purchased new in Vancouver and the owner gave carte blanche to John Broek, reputed Porsche tech and head tech at Porsche MCL to build him a beast. I won't discuss $$$ but suffice to say there was no expense spared in building it. Some stuff was utterly out of place for such a car, like a complete respray with 12 coats to create a glass finish and a $15k sound system but the engine was completely custom. Again my memory is foggy (this is about five years ago) but I seem to recall 864HP (or 846?), complete build (top and bottom) but can't recall the details (3.8 possibly), I want to say K27s, motec, headers and straight pipes. The owner eventually sold it to someone I used to know. He kept it for a while but didn't use it and eventually sold it to a buyer in Florida. I saw the car listed on eBay a year and a half ago. Sadly, the car had undergone a color change to polar silver. I don't think the car was ever tracked while in Vancouver.

Bradford

[QUOTE=Louis J.;6933843] Sadly, the car had undergone a color change to polar silver.


Interesting, when you mentioned it had been repainted silver, that rung a bell. When I was in the market for a TT about 4 years ago, there was a German lady selling her TT out of a small boutique Porsche shop in Malibu on consignment. It was a pretty cool looking car and she made some outrageous claims about the HP . She really didn't have much info on the engine build but said it had 700+ HP (which may have been true). Then she told me the car use to to be red and she had it repainted silver. Bottom line is she was asking $100k for the car and would not budge on the price. I am sure it is the same car as above.

Wilder

Yes, the Florida buyer was a German lady and the one thing she didn't like was the color. It's too bad she did a color change and that she didn't seem to know the car well. The car was well documented before it left Canada. I can tell you that she paid above her asking price and that the car was, at the time, well worth every penny she paid.

The lamentable thing about this car is that it seems to suffer from a split personality. It was, at the time, an extremely pretty car - flawless and show quality, yet a brute of a car to drive on the street. A car like this belongs on the track where 12 coats of paint and expensive sound systems are a drawback.

Basal Skull

Ah the (other) famous Arena red turbo from Vancouver... well don't know much of the details except John just recently had my car for month and a half and learned a little more about this car's build. It was a 3.8 build, gt2 evo cams, mechanical lifters, 'special turbos and intercoolers' from Japan. Bob Holcombe did the final tuning so motec I believe. Functional turbo s ducts. John said he bought it from his customer and tracked it, prior to selling it for a nice profit. Don't think it could pass emissions in Vancouver...

Wilder

Hi Ryojo. It's nice to have that info to fill in the gaps. That thing was a beast and not meant for the road.

LAT

What and how do these work?

Basal Skull

John said he had it routed to cool the rear brakes.


Hi Louis. Too bad I didn't know about that car when I was looking, sounded like it traded hands around the time or just before I picked up my car. May not have been the car/too much to get into when I was upgrading from a 85 targa though!

Ryojo