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#1 |
Senior Member
![]() Join Date: Jun 2010
Location: Illinois
Posts: 2,957
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LS vs Vortec mpg ?'s
If I am going to put a FI engine in my C10 what should I be looking at for the most mpg's. I don't know if there would be difference between the two or not. I am just thinking a stock engine at this point with probably a 4l60e trans. Would on of the LS engines be better to have over a Vortec?
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Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie |
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#2 |
Registered User
Join Date: Aug 2012
Location: Indiana
Posts: 470
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Re: LS vs Vortec mpg ?'s
well what do you mean by vortec? because vortec has been an engine classification for pretty much all chevy trucks since the late 80s.... for purely MPGs I would imagine the 4.8L or 5.3 would be your best bet with the DOD and a 6l65e, if you really want the MPGs I think thats the best route... but other guys may have an opinion. Also the rear gear would make a huge difference, and tire size.....etc etc... what kind of driving will you do with it city? highway? both?
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70 C10 working on a LSx swap ![]() 4.8L MS3 edelbrock pro flo intake, pacesetter long tubes, 4l60e 2500 stall hoping the tranny holds up lol |
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#3 |
Senior Member
![]() Join Date: Jun 2010
Location: Illinois
Posts: 2,957
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Re: LS vs Vortec mpg ?'s
By vortec I was referreing the the 4.8,5.3,6.0l engines. I am doing a restoration on my 85 short bed c10. This is just going to be a toy more less. I just figure that by going to either one of these vortec or ls engines would get me much better mpg's and realiability. I would be content with a 4 speed auto trans. I am not sure of what gears I have now but I would say they might be 3.73's. It had 2.73's in it and the rear end now is much lower geared than the original.
I still want it to have some pep but get decent mileage if and when it gets taken on a long drive. 10 mpg just doesn't get it anymore. After getting this one done I am going to focus on doing the same truck except 4wd. So I am trying to research for it as well.
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Roy 85 Short Bed Silverado- Work in progress. http://67-72chevytrucks.com/vboard/s...d.php?t=564818 1987 R10 shortie |
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#4 |
Registered User
Join Date: Sep 2009
Location: Monroe,Iowa
Posts: 4,370
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Re: LS vs Vortec mpg ?'s
I put a 2004 5.3 with a 700R4 and 3:42's in my 92 S10,I left the stock tune on my computer and I'm getting 20 mpg's at 65 on the highway. If I had it to do over I might have been as happy with a 4.8 for mileage. In my case the 5.3 makes more than enough power to put a smile on my face everytime I drive it.
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#5 |
1965 Chevy C10, 2005 4.8L/4l60
![]() Join Date: Aug 2004
Location: DFW Texas
Posts: 8,543
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Re: LS vs Vortec mpg ?'s
I have a 4.8/4l60e/3.73 in my 65. I have gotten 20.5mpg on a 325 mile round trip to Abilene last fall. around town I get about 16-18 with mostly +/-45mph limits
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Clyde65 Rebuild of Clyde http://67-72chevytrucks.com/vboard/s...84#post8338184 69 Aristocrat Lo Liner build http://67-72chevytrucks.com/vboard/s...84#post7561684 ![]() ![]() ![]() support our troops! |
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#6 |
meowMEOWmeowMEOW
Join Date: Sep 2009
Location: MKE WI
Posts: 7,128
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Re: LS vs Vortec mpg ?'s
I average 15/19 through a stalled 4l80e and 6.0 better than any other all steel hot rod I've ever had.
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'66 Short Step / SD Tuned / Big Cam LQ4 / Backhalfed /Built 4l80e / #REBUILDEVERYTHING ![]() |
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