Computer Diagnostics and Tuning Technical discussion on diagnostics and programming of the F-body computers

Best aftermarket EFI system???

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Old May 29, 2004 | 02:55 AM
  #1  
Highlander's Avatar
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Best aftermarket EFI system???

Hello guys...

I am looking for the best efi system... Price is always an option, but one can look into it...

I want to retain:

1) MAF SENSOR

this is something i will not live w/o...

I am looking for a PCM that has as many resolution points as an LS1 PCM and that has all driveability feautures as the OBDII gM ECM..

The LT1 might not cut it in the future with the boost and different things...

I am also interested in it not being a PITA to install and wire up.

I would love to retain my stock tach and gauges w/o the need of the stock PCM for ANYTHING... i want that this aftermarket pcm retains all IAC functions and Check engine and all the sorts...

Let me know whats out there that can "match" an OEM LS1 or similar pcms.

I would love to not need the gigantic crank wheel and i would like to use the ls1 coils also.
Old May 30, 2004 | 12:06 AM
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You are looking for a very high end aftermarket ECU. I think for what you want MOTEC is the only one offering close to such abilities. And as you may as well know MOTEC is very expensive. Currently the Accel G7 ECU offers very good and near OE quality control even though it is still a speed density system.

As for configuration a Motec is not the easiest to use. Wiring wise its about the same as any of the other systems out there and it also utilizes GM style sensors. Its going to be hard to say when someone will be out with an aftermarket system that will match an OE computer anytime soon. Accel has done a good job, but its still a long way from an OE PCM. Even the high end Motec cannot control 8 coil paks!
Old May 30, 2004 | 12:09 AM
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That can be accomplished by the LTCC w/o problems.. it can be adapted and that is it...

Im looking for a good solution to my tunning "problem"... I need something that will get over the boosted part throttle.
Old May 30, 2004 | 12:21 AM
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Yes that is correct you can use the LTCC system or a DELTEQ system in conjunction with the GM PCM but neither system is compatible with a ACCEL system or others that I know of. I just sent you an email concering your question on the DFI thread I have on the for sale forum.
Old May 30, 2004 | 12:22 AM
  #5  
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email to highlander@caribe.net
Old May 30, 2004 | 12:24 AM
  #6  
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Originally posted by tjwong
....Even the high end Motec cannot control 8 coil paks!
That's odd.... my lowly M48Pro does. All you need is a cam reference signal (the Opti low res pulse works great) and the MoTeC IEX 8-channel ignition expander. The shop that installed mine has also developed a 10-channel driver for the Viper.

http://cjcfo.fbody.com/members/injun...os/Coils01.jpg

The latest versions (M800/M880) can handle drive-by-wire, active suspension control with ground speed reference, traction control, variable cam timing on 4 cams...... the list goes on.
Old May 30, 2004 | 12:29 AM
  #7  
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Price on that puppy????
Old May 30, 2004 | 05:13 AM
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Originally posted by tjwong
Yes that is correct you can use the LTCC system or a DELTEQ system in conjunction with the GM PCM but neither system is compatible with a ACCEL system or others that I know of.
LTCC is FAST compatible.
Old May 30, 2004 | 04:47 PM
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LTCC is compatable with the Accel DFI as long as it's the 74022L or 77022L which are the LT1 specific ECU's.
Old May 30, 2004 | 05:14 PM
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Yes, however, LTCC is strictly LTx specific, so goes without stating so.
Old May 30, 2004 | 05:42 PM
  #11  
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I've been looking at the motecs.. and they appear to be the king of all of the PCMs... actually it looks that at least with the m600 you can remove the stock PCM... stilll a few bucks to spend with it.
Old May 30, 2004 | 06:01 PM
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Originally posted by The Highlander
Price on that puppy????
$4k-$5k. But thats bare. All those nice extra features cost alot. To have a single WD o2 cost $900 and $400 for a second. Drive by wire costs $500. They are topline of the line systems, but at a top of the line price.
Old May 30, 2004 | 06:55 PM
  #13  
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the only thing you really need is the 2 input wideband.
Old May 30, 2004 | 11:56 PM
  #14  
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Originally posted by Injuneer
That's odd.... my lowly M48Pro does. All you need is a cam reference signal (the Opti low res pulse works great) and the MoTeC IEX 8-channel ignition expander. The shop that installed mine has also developed a 10-channel driver for the Viper.
Thats exactly what I was refering to, was that their systems as advanced as they are cannot do CNP ignition without an additional box to interface with. The OE GM LS1 based PCMs handle all that and more within one box. And code wise are even more advanced than the MOTECs but the difference is that the average person even with tools such as LS1 edit can't get access to anymore than what their tools allow us to. There are many more tables within the GM PCM that has yet to be found, and I have seen the GM toolsets to change programming within the PCMs and its nothing like we have seen before. Right now all we can basically do is edit the operating constants that the PCMs use. The stuff I seen can edit the actual firmware and actual code to change the actual PCM control logic. If only I could get my hands on that...... I could be real dangerous......
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