PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

advice please...

Thread Tools
 
Search this Thread
 
Old Sep 27, 2010 | 12:08 PM
  #1  
02' hawk's Avatar
Thread Starter
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2005
Posts: 664
Likes: 0
From: Robertsdale,AL.
Default advice please...

i have a 2002 t/a that has a 451 lsx with ALL the bells and whisltles with a f1c prochrger.

I'm trying to decided on an s/d tune or keep a MAF tune? I have the 100mm power maf but the pcm is MAXED out. The weather changes here in lower AL every 20 minutes and would love to keep the MAF tunes.

Is there another pcm that could be used that has a higher calabration program for the maf? I'm not wanting to spend a tone of $$$ to get this going.

Thanks.
Reply
Old Sep 28, 2010 | 01:53 PM
  #2  
YellowToy/A's Avatar
TECH Fanatic
iTrader: (1)
 
Joined: May 2004
Posts: 1,016
Likes: 0
From: Northern WV just south of MD
Default

I think you need to get rid of the MAF. With a good tune you will not know the difference.
Reply
Old Sep 28, 2010 | 02:52 PM
  #3  
02' hawk's Avatar
Thread Starter
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2005
Posts: 664
Likes: 0
From: Robertsdale,AL.
Default

ok. Will there be a difference in AFR's in 20deg vs. 100deg weather??
Reply
Old Sep 28, 2010 | 02:53 PM
  #4  
Rob Raymer 2's Avatar
Staging Lane
 
Joined: Aug 2010
Posts: 82
Likes: 0
From: Louisville, Ky
Thumbs up

Originally Posted by 02' hawk
i have a 2002 t/a that has a 451 lsx with ALL the bells and whisltles with a f1c prochrger.

I'm trying to decided on an s/d tune or keep a MAF tune? I have the 100mm power maf but the pcm is MAXED out. The weather changes here in lower AL every 20 minutes and would love to keep the MAF tunes.

Is there another pcm that could be used that has a higher calabration program for the maf? I'm not wanting to spend a tone of $$$ to get this going.

Thanks.
Personally, I prefer to keep the MAF for the reasons you stated (weather changes). I tuned my own FI LS6 car with a MAF first, then later changed to a SD tune. Even with it "dialed in", I found myself needing to make too many changes for it to run consistently. So I went back to the MAF and left it.

But, like I said, that's just my opinion.

Good luck!
Reply
Old Sep 28, 2010 | 04:56 PM
  #5  
BLK02WS6's Avatar
9 Second Club
iTrader: (2)
 
Joined: Jul 2002
Posts: 2,583
Likes: 1
From: on the dyno tuning in MD
Default

No question... 2 Bar Speed Density custom operating system...
Reply
Old Sep 28, 2010 | 05:53 PM
  #6  
STAR's Avatar
Launching!
iTrader: (1)
 
Joined: Aug 2004
Posts: 278
Likes: 1
Default

I believe with the powr maf in a 4" housing you could support big hp. You would need to fool the pcm and cut alot of tables in half...I'm no tuner so I couldn't give you the specifics. From what I have read most tuning experts (Greg Banish, Tuning School) prefer a maf set up as long as you can meter the airflow. Speed Density is more reserved for race cars where changes are made all the time.
Reply
Old Sep 28, 2010 | 07:18 PM
  #7  
5.7 ute's Avatar
11 Second Club
 
Joined: Oct 2006
Posts: 149
Likes: 0
Default

Just scale the airflow/IFR tables etc & be done with it.(Dont forget the timing references will change)
The airflow limits will be there in an SD or maf tune so you will have no other choice if the stock pcm is to be retained.
Reply
Old Oct 4, 2010 | 08:09 PM
  #8  
02' hawk's Avatar
Thread Starter
TECH Enthusiast
iTrader: (6)
 
Joined: Aug 2005
Posts: 664
Likes: 0
From: Robertsdale,AL.
Default

Originally Posted by 5.7 ute
Just scale the airflow/IFR tables etc & be done with it.(Dont forget the timing references will change)
The airflow limits will be there in an SD or maf tune so you will have no other choice if the stock pcm is to be retained.
IFR tables...... what is that?
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 Oct 4, 2010 | 08:16 PM
  #9  
5.7 ute's Avatar
11 Second Club
 
Joined: Oct 2006
Posts: 149
Likes: 0
Default

Injector flow rate. This needs to be scaled by the same percentage as your airmass model (VE or Maf)to keep the fuelling in check.
Reply




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

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