shiv@vishnu

iTrader: (20)

Toward the end of the day, I got to custom-tune another EVO 9. This one belonging to Gary who drive all the way up from Souther California. Unlike Sammy's EVO 9 from earlier in the day, Gary's car was slightly modified with a dp, cat-back and high flow cat (not a test-pipe). On the dyno, it baselined at 242-244whp, or about 10whp stronger than a typical stocker. Again, perfectly in-line with what we expect with those mods and a stock ECU. After a custom tuning, it put down a stout 295whp. That's a 22% gain with just a reflash Also on 91oct. Peak boost is 22.5psi, tapering off to 17psi by 7500rpm.

Here's a graph comparing the stock ECU vs. our custom-reflash:


And yes, you knew it was coming. Here's a graph comparing Gary's lightly modified and Vishnu tuned EVO 9 to a bone stock 420bhp 05 Porsche 911 Twin Turbo:


Notice how close they are in power output through the midrange. Down low, the 3.6L Porsche motor (equipped with Variocam and Varioram) outpaces the EVO's tiny 2.0L. And again above 6000rpm, the Porsche shines when boost jumps from 10psi to 13psi (those wierd Germans!) Also notable is how much more linear the pull is on the EVO. This is the difference between a motor that was mapped to make the marketing-driven 420bhp to one that was tuned to make the most it safely could given the limitations. The latter will show a power curve closely mimicking a typical VE curve.

Also worth noting is that the 996tt, despite its 35whp advantage over the EVO, weighs a substantial 3660lbs (or about 750lbs heavier than my 996 c2 ). The EVO weighs in at just 3263. That gives the following wheel horsepower-to-weight figures:

Stock EVO IX: 13.8:1
Gary's tuned EVO IX: 11.5:1
Stock 996TT: 11.4:1

Now that's what I'm talkin about!

-shiv

NoTec

iTrader: (4)

What does a stock 996tt run in the quarter and at what mph?

shiv@vishnu

iTrader: (20)

Gimme 20 minutes. I'll head on out now and find out.

j/k

I've seen them do the 1/4 in high 11s at 118-120mph. On pump gas.

shiv

freshevo8

iTrader: (16)

ok, so is it a 911tt or a 996tt? i'm getting a little confused here because your saying both in your post.

shiv@vishnu

iTrader: (20)

It's offically called the 911tt. But the 996 designation refers to the body style ranging from 1999 to 2005. This was also the first platform to use water cooled engines. 2006 marks the first year of the brand new 997 platform. Unfortunately, the 997tt is still in development. But given Porsche's history of continually improving the state of the 911 (much like Mitsubishi and the Evolution, in fact!) I'm sure it will be crackin'! At ~$130k, it better be

shiv

NoTec

iTrader: (4)

WOW, like the English would say, I reckon thats a quick lil' 1600 kilo bugger.

freshevo8

iTrader: (16)

oh, i'm trackin now. i dont know to much about the porshe's other than certain models, like the 911tt. i've seen one at the track and it only ran 12.3 for its fastest time bone stock. that could've been driver error to. he wasn't launching very well either.

Ultimate CC

iTrader: (122)

Great numbers and nice comparison

RazorLab

iTrader: (8)

How come the torque curve is much flatter and stays up longer on the stock IX?

I noticed the reflashed version peaks faster but also drops faster.

Also your porsche comparison doesn't make any sense, you say the reflashed evo and the porsche have almost the same horsepower-to-weight figure but then you say the stock porsche traps 120mph in the 1/4. I have yet to see a EVO that makes 300whp on your dyno trap 120mph.

fromWRXtoEVO

iTrader: (18)

ROAD AND TRACK tested the TT996 Porsche agaisnt the viper and the 405hp z06 and it got a 12.7@117

shiv@vishnu

iTrader: (20)

Gearing and useable powerband helps. When you drive a stock 996tt, there is essentially no turbo lag between shifts. And the faster you go, the harder it seems to pull. I'm also sure there are some aerodynamic effects that happen at higher speed that make the Porsche pull harder than the relatively brick-shaped EVO. Stomping on the gas at 100mph in the Porsche results in absolutely startling levels of acceleration. I'm guessing that getting to the end of the 1/4 would also take one less shift in the Porsche. Also, my power:weight calculations don't take into consideration a driver which will skew the comparison more towards the favor of the porsche. Still, I'd suspect the EVO would be capable of seeing trap speeds around 113-115mph. While the Porsche could potentially see 117-119mph. I think 120 may be a bit to optimistic but who knows, I've never drag raced one myself

Shiv

RazorLab

iTrader: (8)

So you implying above that a flashed IX is going to be close performance wise to a new 911 Turbo isn't correct then right?

also, how close is your dyno to the gruppe-s mustang dyno?

shiv@vishnu

iTrader: (20)

I'm not trying to imply anything. Just presenting imperical data and best guesses based upon historical results. But yes, a flash EVO 9 (with full exhaust) is nearly as quick as a stock 996tt.

I have not conducted any controlled a/b/a testing with the dyno at Gruppe-S so you're guess is as good as mine. But I've heard from people that have used both that they read very close to each. I do know that the Mustang Dyno I use at our Union City install center (Full Function Tech) gives very similar numbers to our DD dyno in Blackhawk. The only real problem with both Mustang dyno locations is their testing conditions (ie relative lack of fresh air ducting/exhaust evacuation.) This tends to heavily skew the results if not controlling testing conditions carefully.

-shiv

xcdan

What about in the Twisties, that where it really matters! but this is off-topic

streetturbo

The new 997tt is said to have 500hp, stock. That is a nice number to start with imo.