LT1-LT4 Modifications 1993-97 Gen II Small Block V8

7 mpg help!!!!!!!!!!

Thread Tools
 
Search this Thread
 
Old May 6, 2007 | 01:09 AM
  #1  
pugads650's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Oct 2005
Posts: 199
Likes: 0
From: pasadena california
Default 7 mpg help!!!!!!!!!!

recently purchased a 94 camaro from tmorgan800 and it runs great but it is soooo bad on gas. the mods the car has include a lt4 conversion kit heads intake hot cam tes headers 1.6 gmpp roller rockers slp cold air intake lt4 knock module pcm for less tune and a tci 3500 stall converter.

tommorow im swapping out the stall converter and replacing it with a 1800 stock stall im hoping this will cure the gas milage but i doubt that it will give me an extra 7 mpg so what other type maitanance can i do and what are common gas miliage killers in these cars i would greatly appreciate any help you can give thanks.


btw yesterday i put 20 bucks of gas wich here in california 2 gallon haha j/k it was around 5.6 gallon and out of those 5.6 gallon i got exactly 38 miles. this here equates to 6.7 miles per gallon and im paying 3.69 a gallon .




jonathan
Reply
Old May 6, 2007 | 01:22 AM
  #2  
WhyHelloOfficer's Avatar
12 Second Club
iTrader: (5)
 
Joined: Jul 2006
Posts: 583
Likes: 0
From: Tampa, Fl
Default

If you swap the stall out -- basically you're shooting yourself in the foot as far as performance is concerned.

I hate to sound like a jerk, but you purchased a heads/cam/stalled car and expected to get good mileage for a daily driver?

I'm cam only with tuning and a 3000 stall and I get about 9 in the city in heavy stop and go driving. That's one of the downers of running a higher stalled car. My suggestion to you -- obviously you're not too concerned with performance, swapping out the converter. Get it retuned with a more conservative tune on 87 octane.

Also -- as far as normal maint. stuff. Check your tire pressure, alignment, and condition of the ignition system (plugs, wires, optispark, ignition coil). Make sure the air filter is clean. Change the fuel filter. Swap the O2 sensors (only with AC Delco OE Replacements). Common sense stuff (because you purchased the car used) that might have been over looked by other owners.

It also might help to drive the car more conservatively, and avoid sitting in traffic (when you're not moving, you're getting 0mpg). Instead of sitting and waiting to take a left turn, make three right turns.

Its a lot of small stuff that you can do to help, granted its still a decently modded car built more with performance in mind, not fuel economy -- so there is only so much you can do. Or just find some old beater you can use for a DD.
Reply
Old May 6, 2007 | 02:31 AM
  #3  
pugads650's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Oct 2005
Posts: 199
Likes: 0
From: pasadena california
Default

having the torque converter start to grab around 3400-3600 rpm doesnt make sense to me since i dont drag race just the occasional romp on the highway or street race. and when im cruising down the street at around 35 mph the rpms seem to hover around 3-3200 rpms and with a stock stall they should be around 1-1500 rpms.
Reply
Old May 6, 2007 | 01:06 PM
  #4  
Gun5's Avatar
TECH Addict
iTrader: (37)
 
Joined: Feb 2006
Posts: 2,714
Likes: 1
From: Tomball (H-Town), TX
Default

Originally Posted by pugads650
having the torque converter start to grab around 3400-3600 rpm doesnt make sense to me since i dont drag race just the occasional romp on the highway or street race. and when im cruising down the street at around 35 mph the rpms seem to hover around 3-3200 rpms and with a stock stall they should be around 1-1500 rpms.
have it set to lock at like 25mph

i get 9-10 MPG with mods in my sig gears play a big roll then remember our tachs in these cars are about 200 higher then what they really are
Reply
Old May 6, 2007 | 01:20 PM
  #5  
ZONES89RS's Avatar
In-Zane Moderator
15 Year Member
iTrader: (25)
 
Joined: Jan 2007
Posts: 11,941
Likes: 33
From: Conroe, Texas
Default

M6
Reply
Old May 7, 2007 | 01:23 AM
  #6  
pugads650's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Oct 2005
Posts: 199
Likes: 0
From: pasadena california
Default

tommorow i will hook up the data logger and report back with the numbers but before i do that can some one tell what readings i have to get down beacuse im new to this data logging thing thanks again for the help.
Reply
Old May 7, 2007 | 02:31 AM
  #7  
Formula350's Avatar
TECH Senior Member
iTrader: (3)
 
Joined: Oct 2006
Posts: 7,564
Likes: 4
From: Decatur, TN (N-W of Athens)
Default

Originally Posted by Gun5
remember our tachs in these cars are about 200 higher then what they really are

So I idle @ around 500-600rpm? I thought 800 was correct. :\
Reply
Old May 7, 2007 | 05:03 AM
  #8  
3pnt4maro's Avatar
TECH Fanatic
20 Year Member
iTrader: (2)
 
Joined: Jun 2005
Posts: 1,720
Likes: 0
From: Middle Georgia
Default

i have a 3200 edge and my rpm's arent that high cruising at those speeds..my mileage was not affected a ton
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

 Verdad Gallardo
story-1

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-2

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-3

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-4

Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

 Verdad Gallardo
story-5

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-6

10 Camaros You Should Never Buy

 
story-7

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
story-8

Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

 Brett Foote
story-9

10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

 Verdad Gallardo
Old May 7, 2007 | 08:56 AM
  #9  
dhdenney's Avatar
TECH Veteran
iTrader: (53)
 
Joined: Feb 2004
Posts: 4,433
Likes: 0
From: Monticello, Kentucky
Default

Sounds like more a tuning issue than anything. I could 13 out of an unlocked converter in a 700r4 driving 70 mph down the interstate! Slipping like a ****!
Reply
Old May 7, 2007 | 12:20 PM
  #10  
infinitebird's Avatar
TECH Veteran
20 Year Member
Liked
iTrader: (11)
 
Joined: Jul 2004
Posts: 4,280
Likes: 51
From: Denver, CO
Default

Originally Posted by Formula350
So I idle @ around 500-600rpm? I thought 800 was correct. :\
yes, the stock idle is 550rpm on autos. Its a little higher for manuals.
Reply
Old May 7, 2007 | 06:25 PM
  #11  
TransAm12sec's Avatar
Launching!
 
Joined: Mar 2005
Posts: 201
Likes: 1
From: Twin Cities, MN
Default

Originally Posted by Gun5
remember our tachs in these cars are about 200 higher then what they really are
Wouldn't the tach be off by a certain percentage, not a constant rpm? If it were off by 200 rpm at 6500 rpm, that would be 3%.
Reply
Old May 8, 2007 | 12:21 AM
  #12  
pugads650's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Oct 2005
Posts: 199
Likes: 0
From: pasadena california
Default

dhdenny how do you like the vw diesel beacuase im picking one up for a daily driver pretty soon was wondering if they were quick at all.
Reply
Old May 8, 2007 | 07:37 AM
  #13  
dhdenney's Avatar
TECH Veteran
iTrader: (53)
 
Joined: Feb 2004
Posts: 4,433
Likes: 0
From: Monticello, Kentucky
Default

Originally Posted by pugads650
dhdenny how do you like the vw diesel beacuase im picking one up for a daily driver pretty soon was wondering if they were quick at all.
Well you never even think about it only being 100 hp/177 ft lbs, 4 cylinders, and diesel fuel! That thing rocks for no more than it is! I think the older diesels (2004-down) are rated a little lower but probably drive very similar.
Reply
Old May 8, 2007 | 10:18 AM
  #14  
pugads650's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Oct 2005
Posts: 199
Likes: 0
From: pasadena california
Default

yeah i think im getting one with gas approaching 4 bucks a gallon and this damn camaro getting 7 mpg i really needs it.
Reply
Old May 9, 2007 | 06:35 PM
  #15  
dhdenney's Avatar
TECH Veteran
iTrader: (53)
 
Joined: Feb 2004
Posts: 4,433
Likes: 0
From: Monticello, Kentucky
Default

Mine typically gets 43-45 the way I drive it. 50 if I can keep my foot out of it!
Reply




All times are GMT -5. The time now is 01:49 PM.

story-0
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph

Slideshow: A modern Camaro transformed into a retro icon, this limited-run "Bandit" build blends nostalgia with brute force in a way few revivals manage.

By Verdad Gallardo | 2026-04-21 13:57:02


VIEW MORE
story-1
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

Slideshow: Cadillac didn't just crash the high-performance luxury vehicle party, it showed up loud, supercharged, and occasionally a little unhinged...

By Pouria Savadkouei | 2026-04-16 10:05:15


VIEW MORE
story-2
Top 10 Most Powerful Chevy Trucks Ever Made!

Slideshow: Top ten most powerful Chevy trucks ever made

By | 2026-03-25 09:22:26


VIEW MORE
story-3
Hennessey's New Supercharged Silverado ZR2 Has 700 HP

Slideshow: Hennessey has turned the Silverado ZR2 into a 700-hp off-road monster with supercharged V8 power and a limited production run.

By Verdad Gallardo | 2026-03-24 18:57:52


VIEW MORE
story-4
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes

Slideshow: A one-off sports car that looks like a vintage Italian exotic-but hides a C6 Corvette underneath-just sold for the price of a new mid-engine Corvette.

By Verdad Gallardo | 2026-03-23 18:53:41


VIEW MORE
story-5
Awesome K5 Blazer Restomod Comes With C7 Corvette Power

Slideshow: A heavily reworked 1972 K5 Blazer swaps its off-road roots for a low-slung street-focused build with modern V8 power.

By Verdad Gallardo | 2026-03-09 18:08:45


VIEW MORE
story-6
10 Camaros You Should Never Buy

Slideshow: There are thousands of used Camaros on the market but we think you should avoid these 10

By | 2026-02-17 17:09:30


VIEW MORE
story-7
10 LS Engine Myths That Refuse to Die

Slideshows: Which one of these myths do you believe?

By Verdad Gallardo | 2026-01-28 18:10:11


VIEW MORE
story-8
Five Reasons the Camaro Was the Most Pivotal Player in the Pony Car Wars 2.0

The world was a better place when it was still around.

By Brett Foote | 2026-01-23 09:20:37


VIEW MORE
story-9
10 Reasons the LS7 Is GM's Most Extreme Naturally Aspirated V8 Engine Ever

Slideshow: The 7.0-liter LS7 was designed for absolute cutting-edge performance.

By Verdad Gallardo | 2026-01-07 18:36:00


VIEW MORE