PCM Diagnostics & Tuning HP Tuners | Holley | Diablo

Do not allow Behe Performance to tune your car...

Thread Tools
 
Search this Thread
 
Old Sep 30, 2013 | 04:46 PM
  #21  
SPRAYED 01's Avatar
10 Second Club
iTrader: (22)
 
Joined: Mar 2006
Posts: 3,677
Likes: 2
From: Northwest side of Chicago
Default

The tuner i went to said he normally does 12.2afr and 24 degrees timing on 93 and meth. I mean come on, with 20psi of boost and 3800lbs that's asking for it
Reply
Old Sep 30, 2013 | 07:23 PM
  #22  
Russ K's Avatar
TECH Resident
20 Year Member
Photogenic
Photoriffic
Liked
iTrader: (1)
 
Joined: Apr 2006
Posts: 811
Likes: 4
From: Regina, Sask
Default

Looking over your tune there are several errors.

1) Way too much spark timing, plus the knock attack rate is lowered from stock and the knock recovery rate is increased over stock. Plus the max knock retard table is lowered to 4* That is the best way to cause detonation and will melt pistons & lift ring lands. I would start with 14*-16* timing and use 2-3 heat range colder than stock spark plugs.

2) If your tuner did a Maf tune, then why are both Maf tables stock, but leaned out most of the VE table except for adding to the 99 & 105 KPA cells from 3600-6800 RPM? Not sure if your Maf is maxed without seeing a scan log, but likely it is.

3) Looks like the WOT AFR was "tuned" by the PE table. This is the way tunes were done in 2002 with LS1 Edit. Also on these gen IV pcms, I disable the LTFT as negative LTFTs are carried over in PE mode.

4) As for your trans not shifting @WOT, first the rev limiter was lowered 100 RPM, the WOT upshift speeds were increased 2 mph for the 1-2 & 6 mph for the 2-3 & 3-4 shift. The part throttle shifts have to be brutal with 89.9 psi shift pressures at all torque cells.

5) Do you realize that your traction control is disabled?

6) All of your misfire tables are disabled including the P0300 misfire code (plus all the previously mentioned codes) If your cam is causing false misfires, then I would only raise the low RPM & idle RPM misfire event time cells and enable the P0300 code. This way if you have a real misfire, the check engine light will flash.

7) Do you have a 160*F thermostat? And once your ECT hits 196*F, both fans will be on and will stay on until the car is shut off. A 2 bar OS will lower the temp cells of the fan desired table.

Russ Kemp
Reply
Old Sep 30, 2013 | 08:32 PM
  #23  
MEAN GTO's Avatar
Thread Starter
On The Tree
iTrader: (1)
 
Joined: Jul 2007
Posts: 180
Likes: 0
From: Southern MD
Default

Originally Posted by Slowhawk
Sad part there is a lot of shops like this around. People will say they are the best but have no clue there car has a jacked/dangerous tune in it.
Sometimes I wonder if these tuners are actually trying to tune these cars correctly to the best they can do or are just happy to throw numbers out of the dyno, who cares how they drive or blow up?

Keep the faith. There are still many good tuners out there.
Thanks Slowhawk. It does make you wonder, and it just seems like they are trying to get you in and out of the door as quick as they can and move on to the next car. I mean, in business these days you have to move somewhat quickly, but don't charge someone for an 8-hour job that you only spent an hour doing. And certainly fubar their stuff up beyond recognition.


Originally Posted by Russ K
Looking over your tune there are several errors.

1) Way too much spark timing, plus the knock attack rate is lowered from stock and the knock recovery rate is increased over stock. Plus the max knock retard table is lowered to 4* That is the best way to cause detonation and will melt pistons & lift ring lands. I would start with 14*-16* timing and use 2-3 heat range colder than stock spark plugs.

2) If your tuner did a Maf tune, then why are both Maf tables stock, but leaned out most of the VE table except for adding to the 99 & 105 KPA cells from 3600-6800 RPM? Not sure if your Maf is maxed without seeing a scan log, but likely it is.

3) Looks like the WOT AFR was "tuned" by the PE table. This is the way tunes were done in 2002 with LS1 Edit. Also on these gen IV pcms, I disable the LTFT as negative LTFTs are carried over in PE mode.

4) As for your trans not shifting @WOT, first the rev limiter was lowered 100 RPM, the WOT upshift speeds were increased 2 mph for the 1-2 & 6 mph for the 2-3 & 3-4 shift. The part throttle shifts have to be brutal with 89.9 psi shift pressures at all torque cells.

5) Do you realize that your traction control is disabled?

6) All of your misfire tables are disabled including the P0300 misfire code (plus all the previously mentioned codes) If your cam is causing false misfires, then I would only raise the low RPM & idle RPM misfire event time cells and enable the P0300 code. This way if you have a real misfire, the check engine light will flash.

7) Do you have a 160*F thermostat? And once your ECT hits 196*F, both fans will be on and will stay on until the car is shut off. A 2 bar OS will lower the temp cells of the fan desired table.

Russ Kemp
Hi Russ, thanks again for your info. I responded to you on LS1GTO.com (might be buried in more newer posts by the time you get to it.... things have really gotten wild there the past few hours!). I really do appreciate your excellent input. Where are you located??
Reply




All times are GMT -5. The time now is 12:05 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