dfw

Rreemo · 08-13-2012, 11:05 PM

Originally Posted by DirtyD

Well after hearing that, what do I know. Haha.

I'm thinking plenty....bc you essentially had the same suggestion....drive it hard from the get-go!

**46Tbird** · 08-13-2012, 11:50 PM

I waited about 1200 miles before dogging it, and took it to the track at 2400 miles where it went 7.9. I don't think it matters for shit, but personally I prefer to let the cam, crank, and rod bearings establish a wear pattern before taking it to 7k. Ring seal is only an issue on cars that wash them out (carbed, usually) or if you let it get hot causing the rings to lose tension. That's my experience, yours may vary.

Anyway, I average 17.5 to 19 on any given tank. I have gotten as low as 14 and as high as 27.8 coming back from Austin with a crazy tail wind. Highway mpg is usually around 23. That's with 3.73s and 28" tall tires.

Jason, I've never heard of that great a disparity between the dash mpg reading and calculated mpg. It's usually 1-2mpg off at worst.

**Quake5.0** · 08-14-2012, 08:20 AM

I have a mech friend at Bob Thomas Ford that works only on performance issues and warranty issues. He said ford sent out to all ford dealers service heads that it is better for the car to get driven hard from day one. Reason being they spent a lot of time and testing it in racing and extreme everything to do with what ever you can throw at it and found it to be really bulletproof. Plus they tuned the car down with the computer tune cause this motor is very powerful for what it is.

Just what I was told.

**virtu** · 08-14-2012, 10:01 AM

I've gone thru about 6 tanks of gas so far and I seem to average around 15mpg. 75% city/25% highway. Just crossed 1,400 miles on the odo yesterday. If I reset the mpg calculator while on the highway, I can get it to hover around 22-23 doing 80mph with the A/C on. I also have the 3.73 gears.

**virtu** · 08-14-2012, 10:03 AM

Oh and I only run premium.

**DirtyD** · 08-14-2012, 01:49 PM

FWIW, if anyone would like a copy of the spredsheet I put together to keep track of MPGs, just let me know. I'd be more than happy to send you a copy.

Rreemo · 08-15-2012, 04:02 PM

Originally Posted by 46Tbird

I waited about 1200 miles before dogging it, and took it to the track at 2400 miles where it went 7.9. I don't think it matters for shit, but personally I prefer to let the cam, crank, and rod bearings establish a wear pattern before taking it to 7k. Ring seal is only an issue on cars that wash them out (carbed, usually) or if you let it get hot causing the rings to lose tension. That's my experience, yours may vary.

Anyway, I average 17.5 to 19 on any given tank. I have gotten as low as 14 and as high as 27.8 coming back from Austin with a crazy tail wind. Highway mpg is usually around 23. That's with 3.73s and 28" tall tires.

Jason, I've never heard of that great a disparity between the dash mpg reading and calculated mpg. It's usually 1-2mpg off at worst.

Yeah Danny, I'm not paying much attention to that first one, honestly. Not sure what was up with it, but I'm about to need fuel again today or tomorrow, so we'll see how it pairs up this time.

17.5 - 19 seems to be pretty good, and honestly about what I was hoping for. I'm guessing yours is still basically stock and untuned, right? I'd imagine those 28" tires help offset the 3.73's a little as well.

Speaking of (off topic for everyone with 3.73's)....I seem to notice something, not sure what, right at 70 MPH...it's very faint, just a little NVH coming from somewhere....not sure if its the gears, or maybe very slightly something with the driveshaft (balance), or maybe it's just the engine note at that particular speed/RPM....just not an entirely smooth spot. I'm wondering if anyone else has noticed something similar?

I'm overly sensitive to stuff like that...probably leading back to my days in the dealership when I did NVH stuff a lot. It's probably nothing, And I'm probably also just used to the 911, which was extremely (maybe even abnormally) smooth all the way up and past the 3-digit mark.

**PLASMAN** · 08-15-2012, 04:30 PM

Just took off my muffler deletes and put GT500's on and it went up 26mpg hwy, 22mpg city avg 23.4. Tuned

**Midnight11** · 08-15-2012, 04:57 PM

^im interested in your muffler deletes when I get mine in...

**DirtyD** · 08-15-2012, 09:02 PM

Originally Posted by PLASMAN

Just took off my muffler deletes and put GT500's on and it went up 26mpg hwy, 22mpg city avg 23.4. Tuned

What type of city speeds do you typically drive? And are that spaced out lights?

**PLASMAN** · 08-15-2012, 10:38 PM

Originally Posted by Midnight11

^im interested in your muffler deletes when I get mine in...

Sorry bro sold them to a dude on SVT, didnt think anyone here would want them, they droned like a mofo

**PLASMAN** · 08-15-2012, 10:42 PM

Originally Posted by DirtyD

What type of city speeds do you typically drive? And are that spaced out lights?

I drive I35 from carrollton to duncanville everyday 33 highway miles, then about 5 city so a total of 38 miles one way 90/10 HWY/CTY
Hwy speeds 75, city 40 ish, not too many lights

**Midnight11** · 08-15-2012, 10:44 PM

Originally Posted by PLASMAN

Sorry bro sold them to a dude on SVT, didnt think anyone here would want them, they droned like a mofo

damnit! its cool im just gonna hate the stock exhaust lol

**PLASMAN** · 08-15-2012, 10:46 PM

Originally Posted by Midnight11

damnit! its cool im just gonna hate the stock exhaust lol

Theres a guy on svt talking about how he drilled some holes in his stock mufflers for a delete sound, if anyone wants to try it you can have mine

**DirtyD** · 08-15-2012, 11:34 PM

Originally Posted by PLASMAN

Theres a guy on svt talking about how he drilled some holes in his stock mufflers for a delete sound, if anyone wants to try it you can have mine

I have mine available as well, if someone wants them to try.

His idea actually doesn't sound that bad, but not really my cup of tea.