sdg1871

Here are my YouTube videos of my 991 Turbo S with GIAC Stage 2, Europipe and IPD plenum running race gas (Torco 108) and the GIAC race gas tune file defeating a 12c, Huracan, DB9 and a stock 991 Turbo S.

This was filed at Albuquerque Dragway during goldRush Rally 7. The DA was an incredible, time-killing 9000 feet. My car never lost a match.

My car vs. 12c:


My car vs. Huracan:


My car vs. Stock 991 Turbo S:


My car vs. DB9:

__________________

FORENN

Pretty dang awesome!

sdg1871

I was thrilled with how the car performed. Even with heat soak, which made ET's go up by about a half a second, it still crushed everything inside. The only Goldrush Rally cars that posted faster ET's were the Porsche 918 and the Bugatti Veyron.

My first run which, was on pump gas, was about 11 three. Thanks to heat soak that quickly rose to 11.7-11.8.

When I then switched to race gas (Torco 108) and then switched to the GIAC race gas tune subfile via plugging my Flashloader into my car's OBD2 port and pressing the "race" button,
, my ET's fell back to 11.2-11.3.

sdg1871

In this post, I analyze, based on the time slips, the effects of heat soak power loss and then the addition of top shelf race gas (Torco 108 -- the Torco equivalent of VP's MS109) paired with the GIAC Stage 2 race gas tune subfile.

Here are the pictures of my time slips. My best run was, of course, on race gas with the GIAC Stage 2 race gas tune file activated. It was an ET of 11.2743 with a trap speed of 124.10. According to the dragtimes.com density attitude correction calculator, the DA at the time of this run (6:53 pm local time) was 7,721 feet (the track elevation is 4943 feet and at the time of this run the air temp was 82 degrees F, the barometric pressure was 29.87 inches and relative humidity was 31%).

Running that through the correction calculator yields at sea level ET and trap speed of 10.796 at 129.377 mph. See http://www.dragtimes.com/da-density-...ect+ET+and+MPH

The result would have been a lot faster if the car were cool and running race gas.

These time slips show the brutal effect of heat soak on the performance. I am car number 52 in the slips. The car's performance mods: GIAC Stage 2, Europipe exhaust with 100 cell cats, IPD Plenum, BMC filter and Champion Race Diverter Valves. Tires were Michelin Pilot Super Sports in OEM sizes riding on ADV005 track spec CS wheels with titanium fasteners in OEM sizes (ADV1's top of the line and lightest wheel with a retail price of about $15,000). Car has no suspension mods.

All runs were using launch control with spoilers retracted and the PDCC button off to allow for the most weight transfer on launch to the rear wheels. The car was emptied of any luggage or extra weight. The AC was off and everything electrical that could be turned off was turned off. Windows were closed and, to minimize drag, I did not mount GoPros or anything else on the outside of the car.

The first five runs were on pump gas.

The first run, when the car was cool, was a 11.3751 seconds at 121.95 mph.

In the second run, the numbers worsened to 11.5352 seconds at 119.94 seconds.

In the third run, the numbers worsened more to 11.7259 seconds at 11.7259 seconds at 120.42 mph.

The fourth run was the worst of the day: 11.9387 seconds at 117.65 mph. This is just massive soak power loss -- an ET .5636 seconds higher and 4.3 mph slower than the first run -- both on pump gas.

The fifth run wasn't much better: 11.7330 seconds at 118.67 mph.

Then I added the Torco 108 race gas, switched to the race tune file and things got much faster.

The 6th run (1st on race gas): 11.3079 seconds at 121.49 mph -- a run even better than when the car was cold on pump gas. This run also had my best 60 foot time of the event -- 1.6847 seconds.

The 7th run (2nd on race gas): 11.3568 seconds at 122.78 mph.

The 8th run (3rd on race gas): 11.3752 seconds at 122.88 mph.

The 9th run (4th on race gas): 11.3296 seconds at 122.55 mph.

The 10th run (5th on race gas) was my fastest: 11.2743 seconds at 124.10 mph.

What this showed me is that the race gas essentially restored the power than I lost to heat soak. Unfortunately, I never got to run the car on race gas when it was cool. Had I been able to do so (the race gas only got delivered to the dragstrip halfway through the event) the car would certainly have broken into the 10s.

sdg1871

The stock Porsche 991 Turbo S was the other car in the slip at 6:12 pm, running at 12.37 seconds. My ET was 11.30 -- a full 1.07 second faster than the stock 991 Turbo S -- virtually all of the gain occurred in the first 1/8 mile.

The Huracan was the other car in the slip at 6:40 pm, running at 12.53 seconds. My ET was 11.37 seconds -- 1.16 seconds faster.

The 12c was the other car in the slip at 6:46 pm, running at 12.61 seconds. My ET was 11.32 seconds -- 1.29 seconds faster.

Tacet-Conundrum

What is the Altitude of that track, any guesses?

FORENN

Very nice. And nice to see the stock TTS beat the Lambo and McLaren, as well.

FBA

Stock meaning no internal engine mods, but otherwise far from stock...

PMNewton

A quick Google search revealed a track altitude of 5,300 ft.

http://www.na-motorsports.com/Tracks...buquerque.html

- Patrick

crs2pepper

pretty impressive results, nicely done

sdg1871

No. The post was referring to the ET of the bone stock 991 TTS that my car beat being faster than both the 12c and Huracan. My modded 991 TTS was a lot faster than all three.

sdg1871

Thanks. Car performed great that day. It still would have beat the other cars on pump gas both with no tune or the regular GIAC Stage 2. But Stage 2 and race gas and race gas tune file made the car much faster.

FORENN

Correct.

Tacet-Conundrum

Thank you Patrick, now I will Google the formula to adjust for sea level. That and try to find all the variables to make the equation work. Have to google them too.

sdg1871

I did exactly that in one of my prior posts in this thread