doc_porsche

Your c4s is gorgeous Scott.....

tcsracing1

bare in mind (not that it matters) that a TT on the powerband is like owning a dodge viper with a hole in the gas tank.....

I stole that little bit from a Motor Trend 1997 issue.

Quadcammer

turbo gas mileage isn't that bad.

On the highway its about 19, around town its about 13mpg. As long as you aren't on it constantly, its not hateful.

tcsracing1

that would be like having a super model for a wife and sleeping in seperate beds...

Edward

Or like owning an NA993, but driving it like a Pirus

Edward

Stewart

Comparing the two is like comparing a Rolex Sea dweller deep sea with a Submariner. Both tell the time, look similar, can be used as a daily wear and work under water - its unlikely that you'll use the former at 12,000 ft, but it's nice to know you own something a bit more special with that much better performance when required. Not sure where I'm going with this analogy, but does anyone get my drift?

Norske

[QUOTE=tcsracing1;9833315]bare in mind (not that it matters) that a TT on the powerband is like owning a dodge viper with a hole in the gas tank.....

You be wrong! All Vipers have holes in there gas tanks!!!!

solomonschris

To make power requires the burning of fuel. If a stock tt is on full boost in the upper rpm range it is making 400hp. This will burn very close to same amount of fuel as any other gas engine making 400hp. Years ago to make big power in a NA engine wild cams with high lift and long duration were used. These engines could make big power once they climbed up on the cam, usually at 4-5,000 and on to redline. These cams made these engines very inefficient at lower rpm's, you could sometimes smell the raw gas coming from the exhaust. The newest engines with variable valve timing and valve lift with precise electronic controls along with variable size and length intake tracts can make big power in the upper rpm range and still be economical and tractable at low rpm's. To me the tt lives between those two extremes. It doesn't have all the fancy engine developments that my 991S has, but it can drive at very low rpm's with wonderful torque and economy and have 400hp whenever you want it. To top all that off, it is really beautiful.

JoeFromPA

Just one more thought on turbo coking.

The advances in oil technology made in the past 15 years are staggering. The highest quality commercially available synthetic oils, today, are far less likely to coke than the oils around at the time the TT was brought to market.

Cooling turbos is commensurate with how hard they were driven. A few quick WOT on public roads? 10 seconds of driving at 2000 rpms. 30 minutes WOT on the track? 5 minutes of driving slowly or idling.

If it's a track toy, cooling the turbos is something to be aware of....if it's a daily driver on normal public roads, you will probably never even have to think about it.

Further, you can install "turbo timers" - devices that keep the car running at idle after you shut off and remove the key for a preset amount of time.

vern1

I f you want more power and a different driving experience then keep the na 993 and get a 997S (it really is a better dd).

Quadcammer

Oil technology is great, but when oil is sitting in the cartridge of a 700 degree turbo, it can still coke. A minute or two of cool down to save $1,600 for a turbo rebuild isn't a bad trade off.

Turbo timers haven't shown to play nice with the immobilizer. Hardly anyone uses them.

Finally, modern turbos are watercooled for a reason and water is pumped through them after shutdown. Obviously thats not an option for our air cooled junk.

pmalenfa

Why would MPG be an issue? I had a 964na (20 mpg average, I guess close to 993na) and now a 993tt (16 mpg average). Just do the math:

Scenario: 5000 miles/yr , 4$/gallon
993na = 1000$/year
993tt = 1250$/year

If you're ready to buy a tt, you won't care about that 250$/yr. For sure, you can be on turbos all the time and your car will do 10mpg but since we're talking about DD, this will not be your case.

Pierre