Torque Converter and Gas Milage...
09-04-2009, 07:45 PM
#1
Torque Converter and Gas Milage...
How does a TQ converter affect gas mileage?
I have been kicking around the idea of getting something in the 2600 range, just to get rid of that lag when you mash the gas. I don't want anything too big, I would like to retain the mild manners it has around town, but I would like something to help it off the line just a bit. I don't race (at the track) I really just play around with it, nothing serious.
The way it sits, if I ease into the gas, until about 10 or 15mph, then mash it, its a monster, but if I just hit the gas from a dead stop, it feels like there is a 6cyl. in there until it gets to about 3K, then it wakes up.
How would a 2600 affect my gas mileage? And how big of a PITA is it to drop the tranny?
I have been kicking around the idea of getting something in the 2600 range, just to get rid of that lag when you mash the gas. I don't want anything too big, I would like to retain the mild manners it has around town, but I would like something to help it off the line just a bit. I don't race (at the track) I really just play around with it, nothing serious.
The way it sits, if I ease into the gas, until about 10 or 15mph, then mash it, its a monster, but if I just hit the gas from a dead stop, it feels like there is a 6cyl. in there until it gets to about 3K, then it wakes up.
How would a 2600 affect my gas mileage? And how big of a PITA is it to drop the tranny?
09-04-2009, 07:51 PM
#2
IMO the hassle of a converter swap in a driveway would not be worth it with just a 2600. I'd say a yank 3000 would be what your looking for. It shouldn't hurt mileage that much as long as you can keep out of the throttle.
Or a circle d 278mm would be a good choice. I have that one and I can stay around 1800rpms driving around town if i want.
Or a circle d 278mm would be a good choice. I have that one and I can stay around 1800rpms driving around town if i want.
09-04-2009, 10:44 PM
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The Stall number is where your convertor starts to fluidly lock up. Or you can think of it as if you start at 700 rpm the convertor will flash or stall to lets say 3200 rpm faster then if you have a 1800 "stock" rpm stall. Thus increasing the ability of your to cover the 1/4. Its like having gears without losing MPG on the highway You can lose mpg in bumper to bumper, but in flowing street driving your not likely to notice and may even gain if your gears are to tall. As once you hit 3rd your convertor locks and normal mpg's are back.
To much stall and to deep gears can give problems on slick roads. You will need to add a big trans cooler to keep from cooking you tranny.
I've always used 2200 rpm convertors in my cars and trucks, but I was rolling old school stuff so I needed the fluid lock-up where as these new trucks have an automatic lock up. So we now can get away with once would be undriveavle, and 3000 seems to be what everbody runs so I would start there myself. Unless you wanna be cheap and get a TBSS convertor as they do 2600 I believe and can be had for $250 instead of $950.
To much stall and to deep gears can give problems on slick roads. You will need to add a big trans cooler to keep from cooking you tranny.
I've always used 2200 rpm convertors in my cars and trucks, but I was rolling old school stuff so I needed the fluid lock-up where as these new trucks have an automatic lock up. So we now can get away with once would be undriveavle, and 3000 seems to be what everbody runs so I would start there myself. Unless you wanna be cheap and get a TBSS convertor as they do 2600 I believe and can be had for $250 instead of $950.
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