Last post on Sep 02, 2007 at 8:41 AM
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#188 of 207 Re: LOL [anythngbutgm]
Aug 29, 2007 (11:17 am)
I burned through a quarter tank of gas doing 1/4 mile runs in the SE-R one night: about 3 gallons in 4 miles.
Aug 29, 2007 (11:31 am)
Wow, was that a stocker?
#190 of 207 Re: LOL [anythngbutgm]
Aug 29, 2007 (12:01 pm)
Yep. Cars get really bad mileage when you hang the throttle body wide open.
#191 of 207 Re: LOL [bumpy]
Aug 30, 2007 (6:23 am)
I have heard from others on other forums that winding the northstar up under full throttle is good for it. So I do that some, but I have not noticed excessive fuel consumption while doing it. I am sure that it probably is getting around 1 MPG while doing this (will have to watch next time), but even so...
#192 of 207 Re: LOL [sls002]
Aug 30, 2007 (6:51 am)
A Northstar can't wind up as much as an SR20, and it probably depends on how the fuel maps and transmission shift points (on an automatic) are set up for the respective cars. I would assume a Cadillac is set up to make high rpms difficult to maintain.
#193 of 207 Re: LOL [bumpy]
Aug 30, 2007 (10:31 am)
In second gear the engine will spin up to 6000 RPMs quite easily, which is about 70 MPH. Since the speed limit is 60, I take my foot of the gas at that point. Climbing a hill with the engine running about 2500 RPMs results in the instant MPG showing about 10 MPG. The transmission will stay in lower gears in manual mode until you shift it. With 315 lb-ft of torque, I do not give it full throttle unless there is plenty of room in front of me.
#194 of 207 Re: LOL [sls002]
Aug 30, 2007 (11:43 am)
In second gear the engine will spin up to 6000 RPMs quite easily
I was thinking it redlined at 5000 rpm. Maybe that was the older ones?
If you could find the space to floor it and keep it planted for several minutes and keep the tranny from upshifting early, I bet you could blow through a few gallons, too.
#195 of 207 Re: Impala SS DOD [sls002]
Aug 30, 2007 (6:11 pm)
The '07 Impala SS EPA sticker says 27 hwy. I have NEVER had a 6 or 8 cyl GM car or truck that couldn't beat the hwy sticker. NEVER!!!!! In 2007 GM can't make an accurate instantaneous fuel consumption gage but they have DOD, Mass air flow sensors, XM radio and air bags? Mileage can't go up to 35 or 40 or more when coasting down a hill in highest gear with foot off accelerator? If that is what you believe then you have little knowledge of physics. Search a little more and you will find SS owners who top 27 mpg on trips. The average owner of my 3.8 L powered car gets 19 but my last 3 tanks were 27, 27, and 28. What the car magazine gets is racing mileage. My '99 Sonoma 4300V6 ext cab that I bought if S. Fla in May this year got an average of 25.5 in the 6 tanks of gas driving back to Indiana, but it is rated at 21 hwy. When I bought a new '88 Formula 350 and took it to Orlando I got 20-21 mpg on the trip. Car and driver got 12 mpg when they tested the car. So what? 20% of the cars in my work parking lot have severely underinflated tires. Should their mileage numbers count?
#196 of 207 A rail uses it's entire 6 gallon tank of fuel in 4.5 seconds or 1/4 mile
Aug 30, 2007 (6:22 pm)
That can be seen at NHRA nationals tomorrow in Indy. They consume the same amount of fuel per second as an engine in an SR-71 spyplane with twin 38,000 lb thrust P&W J58's, flying at Mach 3 with full afterburner. J-58's running at full afterburner can be heard from 17 miles away on a ground test stand.