Notices
GM Engine & Exhaust Performance EFI | GEN I/GEN II/GEN III/GEN IV Engines |Small Block | Big Block |

Heads/cam 5.3. How bad will my gas mileage be?

Thread Tools
 
Search this Thread
 
Old 06-21-2011, 01:59 AM
  #21  
TECH Fanatic
iTrader: (4)
 
pewterliftedz's Avatar
 
Join Date: Nov 2008
Location: Houston
Posts: 1,691
Likes: 0
Received 0 Likes on 0 Posts
Default

sorry man but if you want power and good gas mileage, get a LS based car.
an EC is only going to get worse.
pewterliftedz is offline  
Old 06-21-2011, 02:35 AM
  #22  
TECH Fanatic
iTrader: (3)
 
05gmcsierra's Avatar
 
Join Date: Mar 2010
Location: van nuys CA
Posts: 1,026
Likes: 0
Received 0 Likes on 0 Posts
Default

i get 12 street 19 fwy...
05gmcsierra is offline  
Old 06-21-2011, 04:17 AM
  #23  
Man Motor club
 
rjwz28's Avatar
 
Join Date: Jun 2007
Location: Sunniest city on Earth
Posts: 2,623
Likes: 0
Received 1 Like on 1 Post
Default

What the hell? How does anybody expect 20 city in a truck??? The most efficient 1/2-tons right now are rated at 20-22 on the highway; why would even think for a minute that any less than that in the city is bad? I average 11.8 in the city, 14.5 on the highway, and I drive a 6.2 6-speed 3.73 truck leveled on 33s. I'm not impressed with my mpgs, but I'm not getting bent out of shape about them either.
rjwz28 is offline  
Old 06-21-2011, 12:25 PM
  #24  
TECH Regular
iTrader: (6)
 
FRiCK's Avatar
 
Join Date: May 2010
Location: Sacramento
Posts: 412
Likes: 0
Received 0 Likes on 0 Posts
Default

LS3 swap it and be done with it. Lol
FRiCK is offline  
Old 06-21-2011, 02:11 PM
  #25  
Staging Lane
Thread Starter
 
seh6183's Avatar
 
Join Date: Jun 2011
Posts: 71
Likes: 0
Received 0 Likes on 0 Posts
Default

Well I guess that's it then. This is one project that just doesnt fit into my life at the moment. I would like to thank everyone for thier responses. I think im gonna trade my 4x4 ranger for a 2 wheel drive 4 Banger or something. The thing is, I have to daily drive my truck as my mustang gets horrible gas mileage, I refuse to buy a third car and can't get rid of my truck as I have dirtbikes. 4 Banger ranger or Tacoma here I come.

Thanks again for all the responses.
seh6183 is offline  
Old 06-21-2011, 03:20 PM
  #26  
TECH Junkie
iTrader: (28)
 
TX Tahoe Z71's Avatar
 
Join Date: Nov 2004
Location: Houston, Texas
Posts: 3,835
Received 4 Likes on 4 Posts
Default

I get 9/12 city/highway
TX Tahoe Z71 is offline  
Old 06-21-2011, 08:11 PM
  #27  
TECH Junkie
iTrader: (25)
 
terravast4's Avatar
 
Join Date: Jul 2007
Location: Austin, TX
Posts: 3,102
Received 304 Likes on 221 Posts
Default

I feel much better about my crappy gas mileage now.....
terravast4 is offline  
Old 06-21-2011, 09:35 PM
  #28  
Staging Lane
Thread Starter
 
seh6183's Avatar
 
Join Date: Jun 2011
Posts: 71
Likes: 0
Received 0 Likes on 0 Posts
Default

Ok what about this lol

A 2003 2wd 5.3 is rated at 15/19

What if i did only the following mods?:

k&n intake
ported throttle body
long tubes
high flow cats
2.5 inch piping
magnaflow muffler
tune

Think this setup will be able to retain the stock 15/19 or maybe bump it by 1 MPG?

Also how do I know which ones come with the 3.08's or 342's?
seh6183 is offline  
Old 06-21-2011, 09:43 PM
  #29  
TECH Fanatic
iTrader: (8)
 
f4tal's Avatar
 
Join Date: Apr 2009
Location: Wichita Falls, TX
Posts: 1,166
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by seh6183
Ok what about this lol

A 2003 2wd 5.3 is rated at 15/19

What if i did only the following mods?:

k&n intake
ported throttle body
long tubes
high flow cats
2.5 inch piping
magnaflow muffler
tune

Think this setup will be able to retain the stock 15/19 or maybe bump it by 1 MPG?

Also how do I know which ones come with the 3.08's or 342's?
Do what you want... we've told you our opinions.
f4tal is offline  
Old 06-21-2011, 09:46 PM
  #30  
On The Tree
 
262_NBS's Avatar
 
Join Date: Nov 2010
Posts: 183
Likes: 0
Received 1 Like on 1 Post
Default

Originally Posted by FRiCK
LS3 swap it and be done with it. Lol

the lack of a manual transmission behind a 5.3 is what kills the mileage capability of these trucks.
262_NBS is offline  


Quick Reply: Heads/cam 5.3. How bad will my gas mileage be?



All times are GMT -5. The time now is 02:26 PM.