MPG between 6 and 7
Hi Bob
It really depends if I'm traveling alone in a hurry, down around 6 mpg or if I'm just tagging along behind a convoy of slower trucks then it is 7+ mpg. Sure is nice not to be the slowest truck anymore. At between 10,000 and 11,000 lbs with the aerodynamics of a brick it is now easy to keep up or pull away from stock M37s on 6% grades.
Even with the extended break in period for the 261 on the test stand it seems to be breaking in more. So I expect that if I can control my foot I can improve the MPGs.
No throttle it is pulling about 25 inches of vacuum. Down hill with not throttle it is trying to pull closer to 30 inches.
In 4th gear pulling a hill at 30 MPH the noise of the intake and the noise of the exhaust note our the tail pipe sound a little like an two engine plane with the engines out of sync. As the engine is settling in I've found that it has a really different torque curve than the stock 216. While the 216 didn't like pulling a load below 30 in 4th gear the 261 seems to like it.
Cheers
Sorry I won't make BBQ this year, say hi to every one.
|