Tech / General Engine Is your car making a strange sound or won't start? Thinking of adding power with a new combination? Need other technical information or engine specific advice? Don't see another board for your problem? Post it here!

Raising MPG?

Thread Tools
 
Search this Thread
 
Old 10-02-2015, 11:28 AM
  #1  
Member
Thread Starter
 
apie2546's Avatar
 
Join Date: May 2014
Location: Alpine
Posts: 448
Likes: 0
Received 0 Likes on 0 Posts
Car: 86 Trans Am
Engine: 305 LB9
Transmission: 700r4
Raising MPG?

Recently got the AC fixed on my trans am with 305 tpi. Almost every mechanical part besides spark plugs are brand new. I dumped a lot of money to have this thing brand new. Now with the ac im getting about 11 mpg in town? In town is about 30 mph or so, may not be the best speed for a v8. I do give it a few full throttle throws just to make sure shes alive

On the highway pre-ac I got anywhere from 22-30 mpg. I used to get around 15 in town, any ideas? It runs rough when it first starts because of those damn valve seals, gotta give it one press of the gas on startup to burn it all off.

Any ideas? I always drive in OD. Nothing heavy in the car right now? I will change the plugs this winter, but I am not sure where to go with this?

Considering my friends mopar 6 pack gets 6 in the city, I'd love to atleast get my gas mileage up lol
Old 10-03-2015, 09:42 AM
  #2  
Supreme Member
 
ex-x-fire's Avatar
 
Join Date: Jan 2011
Posts: 1,727
Likes: 0
Received 1 Like on 1 Post
Re: Raising MPG?

Double check the ignition wires are on the right plugs.
Old 10-04-2015, 12:06 PM
  #3  
Member
Thread Starter
 
apie2546's Avatar
 
Join Date: May 2014
Location: Alpine
Posts: 448
Likes: 0
Received 0 Likes on 0 Posts
Car: 86 Trans Am
Engine: 305 LB9
Transmission: 700r4
Re: Raising MPG?

All is well with the plug wires! Not sure. I went on a long trip this weekend. Got around 20 with some passing and in town driving. On hwy mostly.
Old 10-04-2015, 09:08 PM
  #4  
Junior Member
 
75bike's Avatar
 
Join Date: Jun 2015
Location: Tucson, Az
Posts: 4
Likes: 0
Received 0 Likes on 0 Posts
Car: 91 Camaro RS
Engine: 305
Transmission: 5 Auto
Axle/Gears: ?
Re: Raising MPG?

Do you have a tbi or tpi? I took off the snorkle air cleaner, got rid if the hot air tube, and gained 2 mpg on my tbi 305.

Bob
Tucson
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
KarlJ
Tech / General Engine
5
10-09-2015 03:43 PM
tommy z-28
Cooling
5
10-06-2015 10:58 PM
banksGTA
TPI
2
09-13-2015 11:56 AM
Glowsock
Tech / General Engine
2
09-11-2015 11:09 PM
pacoelrapido
TPI
3
09-11-2015 02:41 PM



Quick Reply: Raising MPG?



All times are GMT -5. The time now is 09:05 PM.