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<div class='quotetop'>QUOTE(DamnYankee @ Apr 30 2007, 10:17 PM) [snapback]91889[/snapback]</div>So i guess i'll try it first if i can get it this weekend. Because i installed the tb stall and themostat at the same time and i don't think the stall cause about 4-5 mpg decrease.Quote:
It won't be until I do the cam swap so it might be a week or more.
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great reading thanks for sharing.
<div class='quotetop'>QUOTE(graysilverado5.3 @ Apr 30 2007, 05:48 PM) [snapback]91856[/snapback]</div>IMO, I think that the stall is what is killing your mpg. The TB stall is a 2600? I am only going on prior knowledge--I could be wrong on that figure.:duh: Anytime you enlist a higher than stock stall, you will be revving your motor 1000-2000 rpms higher (depending upon specific applications) in certain gears. Since you are running higher rpms, you are wasting more gas. A higher stall puts your motor right in the beef of the power curve---your motor makes the most power, and uses a lot more gas at that point. I would venture to say that a 160 t-stat allows your motor to run slightly cooler, decreasing the notion of detonation, not allowing the stock fan clutch to engage, allowing better atomization of fuel/air, and to keep timing efficient. With that said, it should keep the motor running more efficiently. Just my :twocents:...Quote:
I installed a tb stall and the 160* thermostat and i lost significant MPG. Anyone think its the 160* thats causing the MPG to decrease??
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I got worse gas mileage when I got my speedo calibrated! :jump: I read an article a couple of years ago that indicated the same thing but it revolved around engine/oil life. That article stated that engine temps around 180-185 provided more oil life than either 160 or 210. Too cold and it doesn't have the full lubricating properties and too hot and it breaks down faster. That is why I originally went with a 180 but have since changed to a 160 per Allen's suggestion to run more timing. I'll look around and see if I could find it.
<div class='quotetop'>QUOTE(txarkitekt @ May 1 2007, 08:44 AM) [snapback]91924[/snapback]</div>There are people with bigger stalls, and bigger cams than mine and they get better gas mileage than me. A tb stall is really a stock stall if you think about it. Its what comes stock on a trailblazer. If it was a bigger stall i would understand about the gas mileage, not its not a big stall.Quote:
IMO, I think that the stall is what is killing your mpg. The TB stall is a 2600? I am only going on prior knowledge--I could be wrong on that figure.:duh: Anytime you enlist a higher than stock stall, you will be revving your motor 1000-2000 rpms higher (depending upon specific applications) in certain gears. Since you are running higher rpms, you are wasting more gas. A higher stall puts your motor right in the beef of the power curve---your motor makes the most power, and uses a lot more gas at that point. I would venture to say that a 160 t-stat allows your motor to run slightly cooler, decreasing the notion of detonation, not allowing the stock fan clutch to engage, allowing better atomization of fuel/air, and to keep timing efficient. With that said, it should keep the motor running more efficiently. Just my :twocents:...
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