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Old 01-12-2018, 10:05 PM   #1
57plymouth
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Default LS swap question

Simple question; does anyone daily drive their LS swapped 240? I'm thinking of a simple 5.3 truck engine swap with no turbo. Fairly stock, with a 4l60e or 700r4 transmission. I don't want a stick shift daily driver.

How is it to live with an LS swapped 240 daily? Any real world mpg?
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Old 01-12-2018, 10:10 PM   #2
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You know that flat torque curve and your right foot will reduce any chances of better than 15mpg.
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Old 01-12-2018, 10:21 PM   #3
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You know that flat torque curve and your right foot will reduce any chances of better than 15mpg.
I drive like an old man. Let's pretend that will continue.

Also the cops in my area are vicious with their fundraising efforts.
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Old 01-12-2018, 10:25 PM   #4
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You know that flat torque curve and your right foot will reduce any chances of better than 15mpg.
Same story with a turbo redblock, honestly
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Old 01-12-2018, 11:12 PM   #5
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I've gotten between 16 and 20 depending on conditions (weather - it's been pretty much either 100 degrees or 20; aggression level - pretty much either old man or hair on fire) in town, around 24 the only time I've taken it anywhere. I think I could probably get the highway number up with a 3.3 rear or T56, but that in-town range is pretty much it. '04 5.3, 2.8/0.64 "street and strip" TKO, 3.73 rear.

Pretty much what I got with a turbo redblock, honestly!
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Old 01-13-2018, 08:34 AM   #6
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Thank you.
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Old 01-13-2018, 12:19 PM   #7
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Mine has been my daily driver for 2 years now. I jave had no major break downs. It passes emissions tests and gets 20 mpg in town and 24 on the highway. It is probably the best car I have ever owned.
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Old 01-13-2018, 12:52 PM   #8
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Quote:
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You know that flat torque curve and your right foot will reduce any chances of better than 15mpg.
Phhhst I got that in my '68 GTO 400 / 400 with 365NA insta-ponies at the tap of the pedal.

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Same story with a turbo redblock, honestly
You did it wrong.
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Old 01-13-2018, 01:01 PM   #9
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Phhhst I got that in my '68 GTO 400 / 400 with 365NA insta-ponies at the tap of the pedal.



You did it wrong.
Too bad those ponies were distributed over 2 tons.
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Old 01-13-2018, 01:03 PM   #10
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Too bad those ponies were distributed over 2 tons.
# 3750 not that much heavier than a 240.

And don't forget the giant LSD pumpkin and driveshaft, so it could actually put it down.

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Old 01-13-2018, 01:14 PM   #11
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Same story with a turbo redblock, honestly
This, my milage went to crap
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Old 01-13-2018, 01:52 PM   #12
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the 940 does alright, but the transmission isn't loving life right now (suspect I should've replaced the pump when I went through it). I haven't had any kind of serious problems with it in the three years its been running. I don't DD it for a variety of reasons (mostly because the a/c leaks down), but there's really no compelling reason I couldn't.
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Old 01-13-2018, 02:13 PM   #13
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I drive mine a few days a week, use it on the weekends to grab hardwood and metal tubing for home projects. Taken it to a few car shows around town, some 500 mile round trips and hoon it from light to light every so often. Been doing this for over a year + now. Zero break downs other then a power steering fluid leak thats fixed. I get around 18-24 city/highway. Sounds amazing and has great torque curve for city.
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Old 01-13-2018, 02:57 PM   #14
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While I don't have an LS motor in my wagon,I have the old school 350/350 Chevy in it. It is now coming up on 30 years that I have been driving it. I have put 285,000 miles on it so far. I have put 2 starters 2 alternators 2 fuel pumps and 1 water pump on it, in the last 30 years. I now run 3.31 gears and get 16 mpg on the highway. I did not build it for MPG I built for sheer fun.The exhaust is S/S built in 1990, The brakes, I put every thing on new from Volvo in 1991, cross drilled all the rotors [120 holes each] the rear pads will have to be changed this year, the front pads are 1/2 worn. I plan on building a 2nd car soon.
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Old 01-13-2018, 03:05 PM   #15
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My 5.0 Chevy TPI motor in my 740 with 3.73 gears and locking tq converter TH 700 r4 gets 15 around town and just over 21 at 75. I would think an LS with newer FI would get slightly more, depending on gearing, I still turn 2500 rpm at 70 or so. I imagine i could get more in town, but it's too much fun to drive the snot out of it, and since its a gray grandpa car, I don't attract much attention
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Old 01-13-2018, 03:19 PM   #16
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It's going to depend on what rear end gears you choose and how much of a lead foot you are. The LS with an automatic gets an average of 17/27 according to EPA fuel mileage studies in a Camaro Z28 body. They are more aerodynamic than a 240, so, that will definitely come into play. I would expect you to get 25 mpg on the highway at a minimum if you set up the final drive gearing the same. The LS is an excellent engine. Super flat power band.
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Old 01-14-2018, 01:38 AM   #17
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I have a turbo 5.3 in mine and I can get 15-20mpg depending on how it's driven and that's 50/50 city/highway. Mine is a 5 speed though. Mine has a pretty quiet exhaust system and sound deadening in the cabin which helped quite a bit.
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Old 01-15-2018, 12:22 PM   #18
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I would daily drive mine, but my wife and daughter don't like it. I drive mine any time I am alone, or with my son. Only problems with the car I have had were self imposed.
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Old 01-15-2018, 12:27 PM   #19
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I'll let you know in 5 to 6 months.
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Old 01-15-2018, 01:08 PM   #20
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Quote:
Originally Posted by Redwood Chair View Post
# 3750 not that much heavier than a 240.

And don't forget the giant LSD pumpkin and driveshaft, so it could actually put it down.

Who's 240?I guess if you don't think a 1000lbs. Is much more.
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Old 01-15-2018, 01:23 PM   #21
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Who's 240?I guess if you don't think a 1000lbs. Is much more.
They weigh ~ #3200 stock.
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Old 01-15-2018, 01:23 PM   #22
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My turbo lsx 244 gets like 15-16 if that. However I have a 25 inch tall tires and 3.73s I'm looking to get some bigger tires on it and possibly regear it
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Old 01-15-2018, 01:25 PM   #23
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They weigh ~ #3200 stock.
I think that's perhaps the most weight a stock 200 series ever weighed. V6 lump with an automatic trans.

https://www.volvoclub.org.uk/pdf/bro.../Volvo1979.pdf

Page 11, various weights for different models. The V6 automatic wagon is 3223. The 244 manual trans is 2794.
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Old 01-15-2018, 07:09 PM   #24
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My 1986 245 with an aluminum 5.3, t56, and 7875 turbo is 3200 lbs. I weighed it at the scrapper.
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Old 01-15-2018, 08:03 PM   #25
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82 242 with manual windows, seats, etc., PS, A/C. With Ford 5.0L, manual trans and 8.8" rear end mine weighed 3036 lbs. on corner scales with about 3/4 tank of fuel and the spare removed from the trunk. With both the Ford and the LS3 I'm seeing 18-22 mpg around town and 24-27 on the highway -- provided you keep your foot out of it. 45-50k miles over the last 22 years -- one broken throttle cable. That's it - dead reliable. Oh - 3.73 gears with the Volvo rear, 3.55 with the Ford.
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