PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

EFI Live Speed Density on 98 PCM

Thread Tools
 
Search this Thread
 
Old Sep 4, 2008 | 04:47 AM
  #1  
jmill96Z's Avatar
Thread Starter
10 Second Club
iTrader: (3)
 
Joined: Feb 2006
Posts: 2,554
Likes: 1
From: Movin' On Up
Default EFI Live Speed Density on 98 PCM

Well after killing 2 MAF's on consecutive runs last weekends with nitrous backfires, I'm looking to kick my car into speed density for the last weekend of the year. I've done some searching, and all I can find is the COS stuff. Can anyone point me to a good method of tuning for SD for my 98. I'm not very familiar with auto VE, or it's compatibility with the 98 PCM. Any help would be greatly appreciated.
Reply
Old Sep 4, 2008 | 07:57 AM
  #2  
LS1-450's Avatar
TECH Junkie
iTrader: (33)
 
Joined: Aug 2005
Posts: 3,783
Likes: 9
Default

Originally Posted by jmill96Z
Well after killing 2 MAF's on consecutive runs last weekends with nitrous backfires, I'm looking to kick my car into speed density for the last weekend of the year. I've done some searching, and all I can find is the COS stuff. Can anyone point me to a good method of tuning for SD for my 98. I'm not very familiar with auto VE, or it's compatibility with the 98 PCM. Any help would be greatly appreciated.

Auto VE. It's not difficult to follow along w/ the tutorial. Just click help & follow the Auto VE tutorial step by step. Afterward, just make sure that your PE settings are yielding the A/F ratio you need for the nitrous during WOT.

Make sure that you understand that during WOT your PCM will be looking @ the PE (power enrichment) file for fueling. So, it's important to make sure that the VE tables & PE files are producing the A/F ratio, confirmed by the wide band.

BTW, I first tune SD (no MAF) every time an intake related change is made on my car. So, 98's can be tuned SD.
Reply
Old Sep 4, 2008 | 08:35 AM
  #3  
jmill96Z's Avatar
Thread Starter
10 Second Club
iTrader: (3)
 
Joined: Feb 2006
Posts: 2,554
Likes: 1
From: Movin' On Up
Default

Thanks for the info on 98 capability. I thought I remembered reading about 98's not being able to log certain things required to accurately perform the Auto tune. I'll give it a shot.
Reply
Old Sep 4, 2008 | 10:41 AM
  #4  
Doc's Avatar
Doc
FormerVendor
iTrader: (9)
 
Joined: May 2003
Posts: 1,573
Likes: 0
From: Jacksonville, Fl
Default

http://forum.ls1tech.com/forums/show...077&highlight=

Read the whole thing but, focus on post #4

Furthermore, Final comanded fueling for WOT will be the richer of the following two tables, PE and Fueling while in Open Loop.

Cat Overtemp protection can over ride both of these with even more enrichment if it is enabled.
Reply
Old Sep 4, 2008 | 01:00 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

Remember also that you will be running off of the low octane spark tables and the backup VE tables since there is no COS for a 98.
Reply
Old Sep 4, 2008 | 05:28 PM
  #6  
jmill96Z's Avatar
Thread Starter
10 Second Club
iTrader: (3)
 
Joined: Feb 2006
Posts: 2,554
Likes: 1
From: Movin' On Up
Default

Originally Posted by Doc
http://forum.ls1tech.com/forums/show...077&highlight=

Read the whole thing but, focus on post #4

Furthermore, Final comanded fueling for WOT will be the richer of the following two tables, PE and Fueling while in Open Loop.

Cat Overtemp protection can over ride both of these with even more enrichment if it is enabled.
I knew there was some crazy stuff with the 98's. I'm gonna give this a stab anyways. If it runs like **** and blows up....... I'll just blame it on you guys
Reply




All times are GMT -5. The time now is 08:20 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