MPG (City,Highway)
I would imagine the K&N intake along with a good tune could boost the highway mpgs a couple miles per gallon. After getting the LTFT's in line, a lot of ppl using the diablo tuner have reported an increase in mileage. So although tranny support for diablo is out of the question, at least you can squeeze out a couple more mpg's. The catback and downpipe may also help a little, anything that is less restrictive on the engine will take less work to get it from point A to point B.
Thats using the DIC and calculating myself. I got 30.5 miles a gallon with the hi flow cat, the magnalfow exhaust, the CAI, and the res delete, after I got it diable tuned and dyno tuned it went up to 32 and I just put in a poly motor mount and put in a tbs and its around 33. Also I use synthetic oil in the motor and transmission which does make a difference.
Last edited by Aaron_Provost; Apr 15, 2008 at 10:36 PM.
TECH Fanatic
Joined: Jun 2007
Posts: 1,316
Likes: 3
From: Dolla$ , TX
So using this new information i think all roads should be down hill! Don't ask how we are going to return tho i havn't figured that out :X
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
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
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo
Awesome K5 Blazer Restomod Comes With C7 Corvette Power
Verdad Gallardo
10 Camaros You Should Never Buy
10 LS Engine Myths That Refuse to Die
Verdad Gallardo
. 
33 does seem a little high.....over the winter i got around 19, now im getting around 21ish---perhaps 22 mixed according to the dic. all of this is on 93 with a stock tune and the mods below.
TECH Fanatic
Joined: Jul 2007
Posts: 1,115
Likes: 0
From: Reading, Pennsylvania
I won't be able to keep my foot out of the gas once I get exhaust/other engine mods done. I'll like to hear the exhaust too much to not be on the gas. Kinda defeats the purpose of doing engine mods in the first place IMO. With the warmer weather I'm up to 14-15 mpg city. I'll get my first real highway test in months in 2 weeks so I'll see what I can get then.
If you are getting 33 mpg, then more power to you, but I am pretty sure you aren't. Big V8s are not capable of that kind of sustained fuel economy with our 4 speed transmission. Even with mpg enhancing mods.
Unless you spend all your time driving downhill, then that might explain it. LOL
Unless you spend all your time driving downhill, then that might explain it. LOL
TECH Fanatic
Joined: Jun 2007
Posts: 1,316
Likes: 3
From: Dolla$ , TX
If you are getting 33 mpg, then more power to you, but I am pretty sure you aren't. Big V8s are not capable of that kind of sustained fuel economy with our 4 speed transmission. Even with mpg enhancing mods.
Unless you spend all your time driving downhill, then that might explain it. LOL
Unless you spend all your time driving downhill, then that might explain it. LOL
TECH Fanatic
Joined: Oct 2006
Posts: 1,190
Likes: 0
I like the engine, and like to pass minivans and SUV's that can't afford their gas bill around here.
Z28SS gets 28 on highway; MCSS never gets more than 22 - 23. Pig *** nose doesn't help aero. I need to look for the COD #'s on the Monte.
Staging Lane
Joined: Mar 2008
Posts: 90
Likes: 0
50,000 miles / never reset DIC / 18.7 lifetime avg
I like the engine, and like to pass minivans and SUV's that can't afford their gas bill around here.
Z28SS gets 28 on highway; MCSS never gets more than 22 - 23. Pig *** nose doesn't help aero. I need to look for the COD #'s on the Monte.
I like the engine, and like to pass minivans and SUV's that can't afford their gas bill around here.
Z28SS gets 28 on highway; MCSS never gets more than 22 - 23. Pig *** nose doesn't help aero. I need to look for the COD #'s on the Monte.
my drive to work is "downhill" almost the entire way (35 miles), when traffic is actually moving the whole way i can keep up a good pace in 4 cyl and stay around 28-30
the drive home however
lucky if i get about 14 
Staging Lane
Joined: Mar 2008
Posts: 90
Likes: 0
50,000 miles / never reset DIC / 18.7 lifetime avg
I like the engine, and like to pass minivans and SUV's that can't afford their gas bill around here.
Z28SS gets 28 on highway; MCSS never gets more than 22 - 23. Pig *** nose doesn't help aero. I need to look for the COD #'s on the Monte.
I like the engine, and like to pass minivans and SUV's that can't afford their gas bill around here.
Z28SS gets 28 on highway; MCSS never gets more than 22 - 23. Pig *** nose doesn't help aero. I need to look for the COD #'s on the Monte.
.33 for the impala
these are numbers i found published