Notices
GM Drivetrain & Suspension Chassis | Transmission| Driveshaft | Gears/Rear End/Differential | Traction Aids

GAS Mileage?!?!?!

Thread Tools
 
Search this Thread
 
Old 12-11-2005, 05:22 PM
  #1  
TECH Fanatic
Thread Starter
iTrader: (14)
 
Grumpy5.3's Avatar
 
Join Date: Nov 2005
Location: South Georgia
Posts: 1,014
Likes: 0
Received 0 Likes on 0 Posts
Default GAS Mileage?!?!?!

Hey guys, I am thinking about gears in my truck. It is my daily driver, and I am considering the tr220 cam. I am thinking either 3.90 or 4.10... But my question is How bad does your mileage suck after this install??? Does it get extremely bad, the same or get any better???
Thanks in Advance!!!
Brian

P.S. it is a rcsb 4.8l basically stock!!!
Old 12-11-2005, 05:30 PM
  #2  
TECH Fanatic
 
CrabhartLS1's Avatar
 
Join Date: Jul 2005
Location: Dallas
Posts: 1,243
Likes: 0
Received 0 Likes on 0 Posts
Default

any more aggressive cam that stock will give you worse gas mileage, just physics really. I'd say, 3.73 gears and a stall that complements the cam well, if you have an auto.

If you have a manual, then 3.90s would be a good choice.
Old 12-11-2005, 07:26 PM
  #3  
11 Second Truck Club
iTrader: (31)
 
bluecajun5.3's Avatar
 
Join Date: Jan 2005
Location: Breaux Bridge, LA
Posts: 5,861
Likes: 0
Received 0 Likes on 0 Posts
Default

don't bother with 3.73's or 3.90's. if your running a stock height tire, go with the 4.10's. i have that cam with 4.10's and i get 20mpg on the hwy. although mine is a 5.3....
Old 12-11-2005, 08:10 PM
  #4  
TECH Senior Member
iTrader: (45)
 
dirt track racer 81's Avatar
 
Join Date: Jun 2005
Location: Hennessey, Oklahoma
Posts: 9,439
Likes: 0
Received 11 Likes on 5 Posts
Default

sorry to steel the thread but bluecajun5.3 what kind of stall you have in your truck with that cam?
Old 12-11-2005, 08:26 PM
  #5  
TECH Fanatic
Thread Starter
iTrader: (14)
 
Grumpy5.3's Avatar
 
Join Date: Nov 2005
Location: South Georgia
Posts: 1,014
Likes: 0
Received 0 Likes on 0 Posts
Default hey

Cajungoose, you say you get 20 mpg on the highway, how many rpm are you running at say 70mph??? just wondering...
Old 12-11-2005, 09:54 PM
  #6  
v8
17,16,15,14,13,12,11 Drvr
iTrader: (10)
 
Join Date: Aug 2003
Location: Mont Belvieu, Texas
Posts: 6,713
Likes: 0
Received 0 Likes on 0 Posts
Default

i get 23 on the hwy with mine running 75 at about 2400 to 2600 some where in that area lol cam and stall 2500 vig. cam 223 225 564 571 114
Old 12-13-2005, 06:15 PM
  #7  
11 Second Truck Club
iTrader: (31)
 
bluecajun5.3's Avatar
 
Join Date: Jan 2005
Location: Breaux Bridge, LA
Posts: 5,861
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by dirt_track_racer_81
sorry to steel the thread but bluecajun5.3 what kind of stall you have in your truck with that cam?
tci 3k stall
Old 12-13-2005, 06:16 PM
  #8  
11 Second Truck Club
iTrader: (31)
 
bluecajun5.3's Avatar
 
Join Date: Jan 2005
Location: Breaux Bridge, LA
Posts: 5,861
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by brian4.8
Cajungoose, you say you get 20 mpg on the highway, how many rpm are you running at say 70mph??? just wondering...
+ or - somewhere's around 2400...
Old 12-13-2005, 06:18 PM
  #9  
11 Second Truck Club
iTrader: (31)
 
bluecajun5.3's Avatar
 
Join Date: Jan 2005
Location: Breaux Bridge, LA
Posts: 5,861
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by v8
i get 23 on the hwy with mine running 75 at about 2400 to 2600 some where in that area lol cam and stall 2500 vig. cam 223 225 564 571 114
that's damn good kevin! i think i need an in person tune, hint hint, lol...
Old 02-03-2006, 01:35 AM
  #10  
On The Tree
 
allenmehrer's Avatar
 
Join Date: Jan 2006
Location: Vallejo CA
Posts: 159
Likes: 0
Received 0 Likes on 0 Posts
Default

Originally Posted by v8
i get 23 on the hwy with mine running 75 at about 2400 to 2600 some where in that area lol cam and stall 2500 vig. cam 223 225 564 571 114
your truck is 3 inches off the ground, i'm sure that helps out alot!


Quick Reply: GAS Mileage?!?!?!



All times are GMT -5. The time now is 10:00 AM.