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  1. N

    Modified engine crewcab gas mileage?

    I should've also clarified also, this truck will be my "daily driver" but I hardly drive the blazer anymore nor will I drive this much, I take the train to work now, when I mentioned a lot of highway miles, that's when I'm gonna be driving maybe twice a year a 700+ mile trip each way. That's...
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    Modified engine crewcab gas mileage?

    Yeah I should have clarified haha. I just kept calling it lockup because it acts similarly
  3. N

    Modified engine crewcab gas mileage?

    Well let me rephrase, I shouldn't have called it a lockup because it technically isn't, what it is is a fuel miser torque converter by Hughes, it acts like a lockup converter by greatly reducing slippage and drops rpms a couple hundred rpm when cruising. Essentially a lockup converter but not...
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    Modified engine crewcab gas mileage?

    I know it doesn't need to be built, I'm just building mine because I was planning on overhauling it anyway (no idea the mileage but leaked fluid bad so it probably is a bit burnt) but a kit to build it is so cheap it was only like 270 bucks, which is the same price for when I rebuilt my 700r4 to...
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    Modified engine crewcab gas mileage?

    Either way I'm installing a lockup converter on the th400
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    Modified engine crewcab gas mileage?

    Yeah man I gotta have the whole truck completely driveable in 2 months and with the rain in ny and the block sitting in the machine shop I haven't been able to make much progress last two weeks. I don't speed and I don't punch it out of stops ever so hopefully I'll see a bit better mileage but...
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    Modified engine crewcab gas mileage?

    Thank you for those numbers, I'll definitely look into it more, either way 4l80 or gear vendors it's not happening for a bit after the dent the motor made in my pocket. I appreciate the numbers so if i go that route I know what I'm looking at after I find a transmission, main thing for me would...
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    Modified engine crewcab gas mileage?

    Main reason for no 4l80 is because I'm just rebuilding the th400 with a kit to build it up for a few hundred, I'm in a time crunch on the truck so doing a full swap isn't really an option at the moment. I'm not hell bent on the th400 route and honestly I'd much rather have a 4l80 from the...
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    Modified engine crewcab gas mileage?

    What's wrong with gear vendors?
  10. N

    Modified engine crewcab gas mileage?

    The whole way I see it is to have a 4l80, modify everything to make it work, put in a trans controller, build it to the same strength my th400 will be, get a new converter, and everything just for OD, I can save up and spend a little bit more on a gear vendors unit i can bolt up and then my 3...
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    Modified engine crewcab gas mileage?

    Yeah the gearing I know will murder me, I'm gonna be on the highway I'll probably cruise 55 in the right lane, much above that and I think it will just suck, also why I'm trying to figure a good exhaust for the truck, the blazer has duals plumbed into a dual in/out 17 inch 2 chamber muffler but...
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    Modified engine crewcab gas mileage?

    I can imagine with those tires and that rear that truck must have been screaming haha. I replaced the balljoints recently on my blazer and man it drove like a new car, steering us very tight now. Probably an inch of play in either direction before the truck moves and still on the original...
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    Modified engine crewcab gas mileage?

    I'm not sure how in any reality running at lower rpm, not having a restrictive y pipe into a bead cat, and running better synthetic oils among other things that have been proven to increase mpg would make mpg worse, but ok? And I calculate mpg by going on a known distance trip from a station...
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    Modified engine crewcab gas mileage?

    For mention of overdrive, at some point down the road I'll probably end up installing the gear vendors 4x4 overdrive kit on the truck. That way I will have overdrive but keep my th400 that is gonna be very built.
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    Modified engine crewcab gas mileage?

    Drivetrain will definitely be more loss, but the weight will probably be the same, Blazer weighed in at 5700 lbs at the metal yard with me and some tools in it, according to the NY dmv my crew cab (which is the absolute basemodel not even a radio from factory, while the blazer is a silverado)...
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    Modified engine crewcab gas mileage?

    Yeah I'll have to, truck will be on the road by June then I'll log what I end up with
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    Modified engine crewcab gas mileage?

    That all makes sense. My whole thing is there is a certain sweet spot of power and efficiency especially in a heavy vehicle. You can have an underpowered stock motor that gets far worse mpg than a modified motor because the motor needs to worked much harder, hence why a lot of times rv cams...
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    Modified engine crewcab gas mileage?

    Truck has a lift already that I would like to keep so smaller tires aren't really an option, smallest 33s but they even look a bit silly on it at the moment. With 3.42s I'd be 400 rpm lower on the highway but I feel like I'd be sacrificing a lot of pickup around town with big tires and that gearing.
  19. N

    Modified engine crewcab gas mileage?

    It's a blazer, gets 20 pretty easily on the highway if I'm not really in the pedal.
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    Modified engine crewcab gas mileage?

    Swapping rear gears would help alot no doubt. 3.08s and 32s definitely is not helping the motor any. My blazer has 3.73s and 33s and that's about the highest I'd go for 33s
  21. N

    Fuel Miser Torque Converters

    Hey, I have a 86 crewcab with a th400 that I recently purchased a Hughes fuel miser torque converter for. Has anyone had any experience with them? It boasts dropping rpm and temperature, as well as increasing mpg a lot. It has phenomenal reviews. Anyone use it?
  22. N

    Modified engine crewcab gas mileage?

    What size tires did you have?
  23. N

    Modified engine crewcab gas mileage?

    I just thought it would be better because my tbi gets good mileage
  24. N

    Modified engine crewcab gas mileage?

    I'm shocked mpg is so bad my 88 blazer gets around 20 on the highway cruising at only a couple hundred rpm lower than the crewcab will be cruising
  25. N

    Modified engine crewcab gas mileage?

    I just want to avoid the 700r4 because the 400 is so much stronger, if I did od swap I'd probably do a 4l80 at some point, yeah it would be over 2500 but I have a lockup converter so it should drop it a couple hundred rpm which will help a lot.

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