Forced Induction Superchargers | Turbochargers | Intercoolers

what a/f do you get max power?

Thread Tools
 
Search this Thread
 
Old Aug 25, 2004 | 06:32 PM
  #1  
cablebandit's Avatar
Thread Starter
9 Second Club
20 Year Member
iTrader: (37)
 
Joined: Nov 2001
Posts: 7,903
Likes: 1
From: Cleveland, OH
Default what a/f do you get max power?

I played a little today with my setup from mid 11s to 12s a/f but it lost power coming from 10.9-11.0 ish. where have you found your setups to make the most power?
Reply
Old Aug 25, 2004 | 07:09 PM
  #2  
MECHAM's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Aug 2002
Posts: 1,243
Likes: 0
From: Colorado Springs
Default

the leaner you go the more power you will make. (not too lean tho)

for a FI car...i would guess 11.5 would be a good safe tune.

its not worth a couple of more ponies for 12-12.5 if things go wrong and BOOM
Reply
Old Aug 26, 2004 | 05:00 AM
  #3  
smokinHawk's Avatar
TECH Senior Member
iTrader: (48)
 
Joined: Jan 2002
Posts: 7,354
Likes: 1
From: Columbus, ohio
Default

i think most of us FI guys tune to 11.5
Reply
Old Aug 26, 2004 | 05:54 AM
  #4  
Slowhawk's Avatar
LS1Tech Sponsor
iTrader: (12)
 
Joined: Nov 2001
Posts: 14,865
Likes: 6
From: Bridgewater,Ma
Default

11.5-1 on the street and 11-1 A/F on the dyno.Most power could be made at 12.5-1 on the dyno,but it won't last too long.
Reply
Old Aug 26, 2004 | 10:09 AM
  #5  
JZ 97 SS 1500's Avatar
LS1TECH Sponsor
iTrader: (2)
 
Joined: Aug 2002
Posts: 2,725
Likes: 0
From: Huntsville, AL
Default

Typically 11.0-11.5 is your best bet for HP and safety margin.

Jose
Reply
Old Aug 26, 2004 | 10:22 AM
  #6  
Ed Blown Vert's Avatar
11 Second Club
20 Year Member
Photogenic
iTrader: (2)
 
Joined: Nov 2001
Posts: 3,066
Likes: 0
From: Sunny San Diego
Default

Hmm, maybe I should change mine. I run 12.0
Reply
Old Aug 26, 2004 | 10:26 AM
  #7  
PurEvl's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: Mar 2002
Posts: 5,469
Likes: 0
From: South of Heaven
Default

graph in sig
Reply
Old Aug 26, 2004 | 11:01 AM
  #8  
Pro Stock John's Avatar
LS1Tech Co-Founder
20 Year Member
Community Influencer
iTrader: (34)
 
Joined: Nov 2001
Posts: 45,330
Likes: 1,767
From: Chicago, IL
Default

12:1 on a Dynojet would be overly lean on the street IMO.

We've been racing my car at 11:1 to keep it safe.
Reply
LS1 Tech Stories

The Best V8 Stories One Small Block at Time

story-0

Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

 Verdad Gallardo
story-1

6 Common C5 Corvette Failures and What's Involved In Repairing Them

 Pouria Savadkouei
story-2

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

 Verdad Gallardo
story-3

Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked

 Pouria Savadkouei
story-4

Top 10 Most Powerful Chevy Trucks Ever Made!

 
story-5

Hennessey's New Supercharged Silverado ZR2 Has 700 HP

 Verdad Gallardo
story-6

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

 Verdad Gallardo
story-7

Awesome K5 Blazer Restomod Comes With C7 Corvette Power

 Verdad Gallardo
story-8

10 Camaros You Should Never Buy

 
story-9

10 LS Engine Myths That Refuse to Die

 Verdad Gallardo
Old Aug 26, 2004 | 11:04 AM
  #9  
MECHAM's Avatar
TECH Fanatic
iTrader: (4)
 
Joined: Aug 2002
Posts: 1,243
Likes: 0
From: Colorado Springs
Default

Originally Posted by 5-liter-eater
graph in sig

thats a nice tune
Reply
Old Aug 26, 2004 | 11:28 AM
  #10  
Black LS1 T/A's Avatar
Moderator
20 Year Member
 
Joined: Nov 2001
Posts: 3,048
Likes: 12
From: Raleigh, NC
Default

Originally Posted by 5-liter-eater
graph in sig
My A/F looks simliar. It's About 11.2 ~ 11.4:1 thru peak torque and leaning to peak power (power drops at about 6400... this was at about 8 or 9 PSI in 3rd gear). I've got more fuel now, so I may be able to give it more fuel (and more boost) over 6000 RPMs.
Reply
Old Aug 26, 2004 | 11:34 AM
  #11  
JZ 97 SS 1500's Avatar
LS1TECH Sponsor
iTrader: (2)
 
Joined: Aug 2002
Posts: 2,725
Likes: 0
From: Huntsville, AL
Default

John hit the nail on the head. A dynojet in our experience is about half a point out (richer) then what the car will run once it sees a real load on the street. A Mustang dyno is the only way to get the accurate reading as well as getting dyno results.

Jose
Reply
Old Aug 26, 2004 | 11:34 AM
  #12  
JERRY2500's Avatar
14 Second Truck Club
 
Joined: Dec 2003
Posts: 1,188
Likes: 0
From: Houma, Louisiana
Default

11.5~12
Reply
Old Aug 26, 2004 | 12:01 PM
  #13  
PurEvl's Avatar
TECH Senior Member
iTrader: (2)
 
Joined: Mar 2002
Posts: 5,469
Likes: 0
From: South of Heaven
Default

Originally Posted by SC-MECHAM-WS6
thats a nice tune
thanks, only problem is the belt slip I had, would have been 650+ if it didnt fall at 6500-6800
Reply




All times are GMT -5. The time now is 02:27 AM.

story-0
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin

Slideshow: This heavily modified 1971 Camaro mixes classic muscle car styling with a fifth-generation Camaro interior and modern LS3 power.

By Verdad Gallardo | 2026-05-12 18:06:42


VIEW MORE
story-1
6 Common C5 Corvette Failures and What's Involved In Repairing Them

Slideshow: From wobbling harmonic balancers to failed EBCMs, these are the issues that define long-term C5 ownership and what repairs typically involve.

By Pouria Savadkouei | 2026-05-07 18:44:57


VIEW MORE
story-2
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-3
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-4
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-5
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-6
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-7
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-8
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-9
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