~7mpg= WTF?!
Thread Starter
Teching In
Joined: Apr 2007
Posts: 1
Likes: 0
~7mpg= WTF?! Ok, the car is running good but not great. My main problem is I am averaging 7mpg. This is my primary driver and it's killing me. Plugs are good, clean air filters, new fuel filter, walbro 255, stock injectors, the car is tuned in open loop so the o2's shouldn't have any kind of difference. What else can I look for? The a/f is right around 11.6-12.4 and it makes no difference wether I am on it the whole time or keeping it under 2500. Where should start looking to get this thing running better?
TECH Senior Member
iTrader: (3)
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
If you have a stall that's in the 3K range, I blame that. I know it's not listed, but not everyone remembers what they have! Could be plugs, wires, coil, ugh a few things :\ That's what kinda sucks about LTx. Hard to diagnose with some things.
whats your a/f under part throttle? im assuming the 11.6-12.4 is wot. the tune would be the easiest thing to blame. my car got 11mpg all city with a 9" and 4.11s on a cam bigger than yours and Ai 190s. even that was running real rich. i would have to roll the windows down at stop lights so i didnt fall asleep.
Assuming that's city mpg, I hate to say it but I don't think that's really unusual for a stroker/heads/cam car running in open loop.
Your best bet imo would be to get an economy car with good gas mileage for a daily driver.
Your best bet imo would be to get an economy car with good gas mileage for a daily driver.
Launching!
Joined: Oct 2006
Posts: 267
Likes: 0
From: Las Cruces, NM
Originally Posted by Formula350
If you have a stall that's in the 3K range, I blame that. I know it's not listed, but not everyone remembers what they have! Could be plugs, wires, coil, ugh a few things :\ That's what kinda sucks about LTx. Hard to diagnose with some things.
In his sig he has a 6spd.
Trending Topics
Open loop doesnt add or subtract for fuel, i.e. your fuel economy is going to suck, find a good tuner who can tune it to run in closed loop. Also get a stock thermo back in there and increase the fan on temp setting.s
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
