PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

tuning needed when Change CAm

Thread Tools
 
Search this Thread
 
Old May 28, 2007 | 04:25 PM
  #1  
tee-boy's Avatar
Thread Starter
TECH Fanatic
iTrader: (8)
 
Joined: Apr 2007
Posts: 1,165
Likes: 0
Default tuning needed when Change CAm

Q1. With a MAF based system, is there really a need to get a tune when you swap a stock cam w/ a more agressive cam? It seems to me that the PCM will recognize the VE differences of the new cam based on input from the MAF.

Q2. Same question as before except cam/head change.

On a similar note, what is the purpose of a VE table in a MAF system?
Reply
Old May 28, 2007 | 05:25 PM
  #2  
foff667's Avatar
LS1TECH Sponsor
iTrader: (2)
 
Joined: Jul 2003
Posts: 7,986
Likes: 3
From: Clermont, FL
Default

Q1. With a MAF based system, is there really a need to get a tune when you swap a stock cam w/ a more agressive cam? It seems to me that the PCM will recognize the VE differences of the new cam based on input from the MAF.
depending on how large the cam is & its application a tune might not be necessary but to get the most out of a given combo it would be highly recommended. The maf/o2's can compensate a good amount at part throttle but not WOT.

Q2. Same question as before except cam/head change.
same as above.

On a similar note, what is the purpose of a VE table in a MAF system?
as a sanity check while the maf is functioning properly & as a main source of fueling if the maf fails.
Reply




All times are GMT -5. The time now is 11:30 PM.

story-0
Topdon ONE vs. Artidiag 800 BT2: Which is the Diagnostic Tablet For You?

Slideshow: We take a close look at the ONE and Artidiag 800BT2 diagnostic tools from Topdon and the reasons to buy one over the other.

By Pouria Savadkouei | 2026-05-28 11:05:11


VIEW MORE
story-1
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine

Slideshow: The controversial Ferrari F6 swaps its original flat-12 for a Corvette Z06-derived LT4 V8 and sends power to four rear wheels through a custom-built drivetrain.

By Verdad Gallardo | 2026-05-26 18:23:54


VIEW MORE
story-2
7 Most Reliable High-Performance Engines GM Has Ever Built

Slideshow:These GM engines didn't just make huge power, they survived abuse, boost, track days, and six-digit mileage with a reputation for refusing to quit.

By Verdad Gallardo | 2026-05-21 16:45:27


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