Notices
Evo Engine / Turbo / Drivetrain Everything from engine management to the best clutch and flywheel.

dynoflash????

Thread Tools
 
Search this Thread
 
Old Mar 30, 2005 | 12:47 PM
  #1  
dave9172's Avatar
Thread Starter
Evolving Member
 
Joined: Aug 2004
Posts: 449
Likes: 0
From: bel air, md
dynoflash????

im considering the mail-in dynoflash, will i need to adjust my apexi safc II once i get the flash??
Reply
Old Mar 30, 2005 | 12:51 PM
  #2  
Dr. Fob's Avatar
Evolving Member
iTrader: (5)
 
Joined: Mar 2004
Posts: 260
Likes: 0
From: Cleveland-Hong Kong
Reset everything to Zero, otherwise you'll be running mega-lean. Mail-in Flashes are usually pretty close to the ideal A/F ratio. Dynoflash sets it at 11.2 from 4000rpm-7000, which i leaned out further to 11.4.
Reply
Old Mar 30, 2005 | 12:51 PM
  #3  
siantjab's Avatar
Evolved Member
iTrader: (2)
 
Joined: Mar 2004
Posts: 664
Likes: 0
From: TPA
You'll want to zero out all the settings on the SAFC and use it for any fine tuning later; like for race fuel.
Reply
Old Mar 30, 2005 | 12:51 PM
  #4  
bluebanana23's Avatar
Evolved Member
iTrader: (26)
 
Joined: May 2004
Posts: 2,032
Likes: 1
From: DTX
it's better to zero everything out before the flash and then you can finetune the flash afterwards
Reply
Old Mar 30, 2005 | 12:54 PM
  #5  
dave9172's Avatar
Thread Starter
Evolving Member
 
Joined: Aug 2004
Posts: 449
Likes: 0
From: bel air, md
its unanimous, thanks guys
Reply
Old Apr 1, 2005 | 08:30 PM
  #6  
DjRiice's Avatar
Evolving Member
 
Joined: Jul 2004
Posts: 376
Likes: 0
From: Baltimore
what is the point of zero-ing it out..?
Reply
Old Apr 1, 2005 | 11:35 PM
  #7  
turbolarry's Avatar
Evolved Member
iTrader: (1)
 
Joined: Nov 2004
Posts: 583
Likes: 0
From: Corona, CA
I had a difficult time tuning an AFC on top of a flash. The timing would not budge between 3000-5000 RPMS despite any fuel adjustments. Only after 5000 RPMS would the timing start to advance and this was after numerous pulls with a logger. Even then it still would not even meet stock peak timing of 20 degrees.
I've asked here and in other forums for people with flashes to post logs, to see if it was a fluke, but I'm still waiting...
If you have an AFC already, just use that. You will have more adjustability and an easier time tuning it alone, then on top of a flash.
Reply
Old Apr 2, 2005 | 07:10 AM
  #8  
Dr. Fob's Avatar
Evolving Member
iTrader: (5)
 
Joined: Mar 2004
Posts: 260
Likes: 0
From: Cleveland-Hong Kong
Originally Posted by DjRiice
what is the point of zero-ing it out..?
The SAFC is merely adjusting the A/F ratio on top of the ECU setting. It doesn't measure the actual mixture in the engine. If the ECU has been flashed, the SAFC will disregard the new settings continue to pull fuel at its preset levels, causing the engine to run dangerously lean.
Reply
Old Apr 2, 2005 | 07:30 AM
  #9  
EVO8LTW's Avatar
EvoM Guru
20 Year Member
Photogenic
Liked
Loved
iTrader: (41)
 
Joined: Jul 2004
Posts: 4,606
Likes: 98
From: Northern Virginia
Originally Posted by turbolarry
I had a difficult time tuning an AFC on top of a flash. The timing would not budge between 3000-5000 RPMS despite any fuel adjustments. Only after 5000 RPMS would the timing start to advance and this was after numerous pulls with a logger. Even then it still would not even meet stock peak timing of 20 degrees.
I've asked here and in other forums for people with flashes to post logs, to see if it was a fluke, but I'm still waiting...
If you have an AFC already, just use that. You will have more adjustability and an easier time tuning it alone, then on top of a flash.
Why are you trying to get the timing to advance over the extra advance that the flash already adds?
Reply
Old Apr 2, 2005 | 12:27 PM
  #10  
turbolarry's Avatar
Evolved Member
iTrader: (1)
 
Joined: Nov 2004
Posts: 583
Likes: 0
From: Corona, CA
Originally Posted by EVO8LTW
Why are you trying to get the timing to advance over the extra advance that the flash already adds?
Because there was no extra timing advance provided by the flash.
It was a flat 5 degrees from 3000-5000 RPMS. Despite any adjustments I made with the AFC at those RPM ranges it was stuck on 5 degrees. Depite stupid pig rich and "should be knocking" lean it would not budge. What ever timing map was loaded into that ECU sucked. After 5000 RPMS then it started to advance normally, but it's so late it would not even meet stock peak timing of 20 degrees.
Timing advance is crucial to tuning these cars. We can't directly see knock, but it can be interpreted from logging timing advance. Flat spots and pulled timing will indicate knock long before you hear it, before A/F ratios, and EGT's. A good steady timing advance through out the entire RPM range is what I look for.
How can you properly tune the car between those RPM ranges if it's stuck/preprogrammed to be flat?
So again maybe, this one was a fluke. If anyone can log a flashes timing advance, please do, and post it.
Reply
Old Apr 2, 2005 | 01:14 PM
  #11  
DynoFlash's Avatar
Account Disabled
iTrader: (91)
 
Joined: Sep 2003
Posts: 16,850
Likes: 0
From: 2003 Evo VIII - Silver
Originally Posted by turbolarry
Because there was no extra timing advance provided by the flash.
It was a flat 5 degrees from 3000-5000 RPMS. Despite any adjustments I made with the AFC at those RPM ranges it was stuck on 5 degrees. Depite stupid pig rich and "should be knocking" lean it would not budge. What ever timing map was loaded into that ECU sucked. After 5000 RPMS then it started to advance normally, but it's so late it would not even meet stock peak timing of 20 degrees.
Timing advance is crucial to tuning these cars. We can't directly see knock, but it can be interpreted from logging timing advance. Flat spots and pulled timing will indicate knock long before you hear it, before A/F ratios, and EGT's. A good steady timing advance through out the entire RPM range is what I look for.
How can you properly tune the car between those RPM ranges if it's stuck/preprogrammed to be flat?
So again maybe, this one was a fluke. If anyone can log a flashes timing advance, please do, and post it.
You dont adjust timing with a afc.

Try an enmanage.

Hundreds of guys have used a SAFC on top of my flash with great success.

It sounds like your individual car has some issues - 5 degrees of timing is way too low.

It seems very backwards thinking to be trying to adjust your timing advance with a fuel pissgy back. . . . anyway i am not suprized that the intended result was not achiveed with such crude methods.
Reply
Old Apr 2, 2005 | 01:55 PM
  #12  
EVO8LTW's Avatar
EvoM Guru
20 Year Member
Photogenic
Liked
Loved
iTrader: (41)
 
Joined: Jul 2004
Posts: 4,606
Likes: 98
From: Northern Virginia
I understand the concept of advancing timing with an SAFC and Dave Buschur has posted about this a number of times. Its most effective if you install larger injectors and then pull 20%+ fuel with the SAFC. This is the way my car was set up before I had a Dynoflash and it does work. The gain I got with the flash was down low mostly.

What doesn't make sense is trying to change timing after you've been flashed. That defeats the purpose of a flash.

As far as the timing numbers you saw with a Dynoflash, I think something must be up with your car or your scantool. I'll be logging some timing numbers on my car with a pocketlogger soon and I can post them if you like. I'm finally in the process of installing my FMIC and after I do I'll be fine tuning the SAFC and logging timing to make sure that I'm not getting any detectable knock.
Reply
Old Apr 2, 2005 | 11:30 PM
  #13  
turbolarry's Avatar
Evolved Member
iTrader: (1)
 
Joined: Nov 2004
Posts: 583
Likes: 0
From: Corona, CA
Originally Posted by DynoFlash
You dont adjust timing with a afc.

Try an enmanage.

Hundreds of guys have used a SAFC on top of my flash with great success.

It sounds like your individual car has some issues - 5 degrees of timing is way too low.

It seems very backwards thinking to be trying to adjust your timing advance with a fuel pissgy back. . . . anyway i am not suprized that the intended result was not achiveed with such crude methods.
Everyone knows the AFC does not control ignition timing. I'm not even going to start with this. But with it I can remove so much fuel to cause knock and a I should see timing being pulled by the ECU. It did not happen in this case. Nothing happened in this case. Despite any adjustments to the AFC between 3000-5000 RPMS.
My questions to you is this;
Can you, or one of your hundred guys using this crude method, please post a log?
Please prove to me that this was a fluke and that there is something wrong with the car.
Reply
Old Apr 2, 2005 | 11:47 PM
  #14  
turbolarry's Avatar
Evolved Member
iTrader: (1)
 
Joined: Nov 2004
Posts: 583
Likes: 0
From: Corona, CA
Originally Posted by EVO8LTW
IWhat doesn't make sense is trying to change timing after you've been flashed. That defeats the purpose of a flash.

As far as the timing numbers you saw with a Dynoflash, I think something must be up with your car or your scantool. I'll be logging some timing numbers on my car with a pocketlogger soon and I can post them if you like. I'm finally in the process of installing my FMIC and after I do I'll be fine tuning the SAFC and logging timing to make sure that I'm not getting any detectable knock.
You can't directly change ignition timing with an AFC, but I can add or remove fuel so the ECU gives optimal advance. This is what I was trying to do on top of a flash.
I have a simple logger on a palm like so many others. I've been using it for almost a year on 2g's, Evo's, including my RS and another friends MR. I've never seen or heard of anything like this before.
Please post your logs when you can. Thanks.
Reply
Old Apr 2, 2005 | 11:51 PM
  #15  
turbolarry's Avatar
Evolved Member
iTrader: (1)
 
Joined: Nov 2004
Posts: 583
Likes: 0
From: Corona, CA
To the original poster dave9172,
Sorry about all this. All I wanted to do was share my experience of tuning an AFC on top of a flash.
Reply



All times are GMT -7. The time now is 05:03 PM.