lt1 - ls1 mpg differneces and why?
For starters the LS1 has a lighter aluminum block making the entire car lighter. Takes less energy to move the lighter car.
Second the LS1 has more efficient movement of air through the motor which lesser drag and resistance.
Third is GM has found other ways to stretch the efficiency of the LS1 compared to the LT1.
Second the LS1 has more efficient movement of air through the motor which lesser drag and resistance.
Third is GM has found other ways to stretch the efficiency of the LS1 compared to the LT1.
Thread Starter
On The Tree
Joined: Mar 2007
Posts: 102
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From: Socal
Yea I know the ls1 has better airflow. But you could get pretty close to that with bolt ons and re working the heads couldn't you? But from what I've heard our engines can't get to the ls1's mpg
On The Tree
Joined: Jul 2007
Posts: 145
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From: Smithfield, VA
I never thought that the LS1 got that much better fuel economy than the LT-1. If you look at hte EPA numbers they were only rated 1-2mpg higher depending on the year. Back a long time ago when I only had bolt-ons I remember getting upper 20s regularly and maybe even 30 mpg once on a hwy trip. But the general answer, that has already been stated, is that the LS1 is just a more efficient design.
I never thought that the LS1 got that much better fuel economy than the LT-1. If you look at hte EPA numbers they were only rated 1-2mpg higher depending on the year. Back a long time ago when I only had bolt-ons I remember getting upper 20s regularly and maybe even 30 mpg once on a hwy trip. But the general answer, that has already been stated, is that the LS1 is just a more efficient design.
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in my usual college commute, i used to get 19-21 mpg with my bolt on lt1, m6. with my stock ls1, m6 with ported tb and a lid, i get 23-24 mpg. this is commute with plenty of stops and 60 mph max. shows you the difference is a non-"all highway" setting.
On The Tree
Joined: Mar 2008
Posts: 116
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Flamesuit on. Here comes another LS1 vs. LT1 pissing match.
TECH Resident
Joined: Aug 2004
Posts: 778
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From: United States
LOLing at the catfish post! I'm keeping my options open. I found a clean lower mileage LT1 that I may pick up just cause its a screaming value. I'd put an STS Turbo kit on without hesitation.
