Any real world ls1 swap mpg numbers? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

Pho20 · 07-29-2017, 03:39 PM

Wondering what way I'll go for power mpg unfortunately has a say in what I'll do have any of you guys dding ls1 swapped cars recorded your mpgs????

DAEMANO · 07-29-2017, 03:40 PM

If you have to ask, these aren't the droids youre looking for.

Pho20 · 07-29-2017, 04:00 PM

Quote:

Originally Posted by DAEMANO

If you have to ask, these aren't the droids youre looking for.

I mean are we in the 20s? Or is it 7mpg like my old Yukon?

swarb · 07-29-2017, 04:46 PM

Quote:

Originally Posted by Pho20

Wondering what way I'll go for power mpg unfortunately has a say in what I'll do have any of you guys dding ls1 swapped cars recorded your mpgs????

Fuelly.com
Look for car with ls1 engine.
Look for car weight/aero/gearing/mpg.
Compare to current car.
Do maths.
Success.

Pho20 · 07-29-2017, 06:13 PM

Quote:

Originally Posted by swarb

Fuelly.com
Look for car with ls1 engine.
Look for car weight/aero/gearing/mpg.
Compare to current car.
Do maths.
Success.

photo and image hosting

carbonBLUE · 07-31-2017, 02:38 AM

i would assume since the corvette is rated above 25 mpg (up to 29 mpg) a swap could mean more mpg. also if you have a ls motor that can go into 4 cylinder mode. then you could be looking at almost 40 mpgs i would imagine

dowroa · 07-31-2017, 08:18 AM

Depends on rear gearing and what fuel mapping you are using.

For reference, the LS6 in c5z06 car returns 31 mpg highway, 18 mpg city (50/50) that I drive with a very few jaunts to redline (I am old, there is no point unless I am racing).

If you are above 5k all the time, expect 7mpg numbers and a car that needs a lot more cooling.

If you are running less/lighter tires and less/lighter car, I would expect improvements below 80mph.

You currently have too many variables in your question to give anything more than a CYA-type/high level estimate answer.

Quite honestly, the "fuelly.com" answer was a stroke of genius. If you can't take the time to look that up, I am not sure you are serious enough about your initial question.

wutsaiu · 07-31-2017, 09:54 AM

15mpg city driving
25+mpg highway

LS3 w/ LS9 cam
TR6070 trans with stock 4.1? final drive
under-inflated high rolling resistance tires

07-29-2017, 03:39 PM	#1
Pho20 Member Join Date: Jun 2017 Drives: 2013 Subaru BRZ Location: Colorado Posts: 80 Thanks: 11 Thanked 16 Times in 10 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	Any real world ls1 swap mpg numbers? Wondering what way I'll go for power mpg unfortunately has a say in what I'll do have any of you guys dding ls1 swapped cars recorded your mpgs????

07-31-2017, 02:38 AM	#6
carbonBLUE Reverse Burnouts Join Date: Oct 2011 Drives: 2013 Argento FRS Location: dallas!!! Posts: 2,894 Thanks: 707 Thanked 1,257 Times in 592 Posts Mentioned: 30 Post(s) Tagged: 1 Thread(s)	i would assume since the corvette is rated above 25 mpg (up to 29 mpg) a swap could mean more mpg. also if you have a ls motor that can go into 4 cylinder mode. then you could be looking at almost 40 mpgs i would imagine __________________ 2000 Carbon Blue Toyota Celica GTS 152000 miles (wont forget you) 2013 Argento Scion FR-S 2011 Infiniti G37x

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07-31-2017, 08:18 AM	#7
dowroa Old Guy Join Date: Jan 2011 Drives: 16 STi, 22 MX-5 RF BBS, 04 OBS RPA Location: Durham, NC Posts: 293 Thanks: 531 Thanked 187 Times in 136 Posts Mentioned: 2 Post(s) Tagged: 0 Thread(s)	Depends on rear gearing and what fuel mapping you are using. For reference, the LS6 in c5z06 car returns 31 mpg highway, 18 mpg city (50/50) that I drive with a very few jaunts to redline (I am old, there is no point unless I am racing). If you are above 5k all the time, expect 7mpg numbers and a car that needs a lot more cooling. If you are running less/lighter tires and less/lighter car, I would expect improvements below 80mph. You currently have too many variables in your question to give anything more than a CYA-type/high level estimate answer. Quite honestly, the "fuelly.com" answer was a stroke of genius. If you can't take the time to look that up, I am not sure you are serious enough about your initial question.

07-31-2017, 09:54 AM	#8
wutsaiu Senior Member Join Date: Aug 2013 Drives: 2015 Raven V8 Location: Aurora Posts: 194 Thanks: 111 Thanked 263 Times in 81 Posts Mentioned: 6 Post(s) Tagged: 1 Thread(s)	15mpg city driving 25+mpg highway LS3 w/ LS9 cam TR6070 trans with stock 4.1? final drive under-inflated high rolling resistance tires

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