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tuning_resources:aftermarket_ecu [2020/03/28 12:25] – created bentuning_resources:aftermarket_ecu [2026/04/09 16:47] (current) – external edit 127.0.0.1
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 ====== Aftermarket ECUs ====== ====== Aftermarket ECUs ======
  
-Megasquirt+Generally if you're going this route you probably don't need any guidance about how to do it. Here are a few aftermarket ECU options and some differences:
  
-Holley Dominator+[[:tuning_resources:aftermarket_ecu:megasquirt|Megasquirt]]
  
-Haltech+[[:tuning_resources:aftermarket_ecu:holley_dominator|]] 
 + 
 +[[:tuning_resources:aftermarket_ecu:holley_hp_efi|]] 
 + 
 +[[:tuning_resources:aftermarket_ecu:haltech|]] 
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 +^ ^Stock PCM^MegaSquirt^[[https://www.haltech.com/product/ht-051100-platinum-sport-plug-in-gm/|Haltech Sport]]^Haltech Elite 750^Haltech Elite 2500^Holley HP EFI^Holley Dominator| 
 +|Cost of ECM|~$100 - $300 for tuning tools|~$600|$1,187|$1,200 for ecu alone|$1,950 for ecu alone|$1,433|$2,300| 
 +|Cost of Wiring Harnesses| | |Uses factory 3800 harness|extra $224 for premium harness|extra $255 for premium harness| \\ ~$700 \\ Can buy as a kit|>$700 \\ Harnesses sold individually| 
 +|Ease of harness install for 3800|Plug and Play|Requires custom harness|Plug and Play|Requires custom harness|Requires custom harness|Requires custom harness|Requires custom harness| 
 +|Ease of use|Moderate|Difficult|Easy|Easy|Easy|Easy|Easy| 
 +|Reviews|Good enough for most people|Difficult to put together, but a lot expandability. Pretty dated now|[[http://www.fiero.nl/forum/Archives/Archive-000002/HTML/20060811-1-057573.html|not great]]| |State of the art. Created in Australia though support can be tricky| |Dominator is basically the state of the art. Holley is very reputable| 
 +|water-proof?|yes|no|no|yes|yes|yes|yes| 
 +|Wideband auto-tuning support|no|no|no?|yes|yes|yes|yes| 
 +|MAP limits for speed density tuning|1.4 bar| |22 psi for ECM's internal MAP sensor| | |5 bar|7 bar| 
 +|drive by wire support|Some PCMs| | |yes| |no|yes x2| 
 +|Transmission control|yes| |yes|yes|yes|no|yes| 
 +|anti-lag / launch control built in|no| |yes|no|yes|yes|yes| 
 +|CO2 control|no| |no|no|yes| |yes| 
 +|Boost by Gear|no| | |yes|yes| |yes| 
 +|Flex Fuel sensor support|not with a 3800 PCM| |yes|yes|yes| |yes| 
 +|Stages of nitrous control|0| |1|1|6|4|8| 
 +|fuel injection outputs|6| |6|1-6|1-8|up to 8|12 "peak" + 12 "hold" = 24 injectors| 
 +|Ignition Outputs|OEM| | |6|8|4 12v or ground PWM|20 12v PWM \\ 16 ground PWM| 
 +|Digital Outputs|none| | |28| | | | 
 +|Analog inputs|none| | |10|20|4|13 "multi-inputs" + 30 sensor inputs (0-5v)| 
 +|injector stages for fueling|1| | |4| | | | 
 +|Internal Data Logging|no| | |yes|yes| |yes| 
 +|Known Oddities| | | | | |can't use external battery charger with ECU connected|can't use external battery charger with ECU connected| 
 + 
 +\\