need some info on mega squirt ecu

lcrotaryracer · 03-01-2009, 07:41 PM

like the title says some info on a mega squirt ecu. if any one that has one or knows about them can give me some general info i'd appreciate the help.

thanks

85rx-7gsl-se · 03-01-2009, 07:42 PM

What is it going on? N/A? TII?

lcrotaryracer · 03-01-2009, 09:01 PM

na for now, but iam going to get a turbo engine later. i want to learn how to tune a car be for then. if i mess up it will not be so bad.
s4 87

85rx-7gsl-se · 03-01-2009, 09:13 PM

Ok...If you were going TII swap, I would go Microtech. For the N/A you could do an Rtek, but you wont have as many tuning options as on the Megasquirt.

Whizbang · 03-01-2009, 09:17 PM

im going to have a write up on this i think once i finish my MS unit. Really not much left to do but i want to check it over for a few things.

NoDOHC · 03-01-2009, 11:21 PM

I did megasquirt on a motorcycle. It used an 8X8 map (manifold pressure vs RPM for fueling and a similar map for ignition advance. The ignition trigger is a little funny (may need to tweak resistance on the on-board filter). Basically, it is the simplest, quickest and easiest ECU to tune, probably the hardest to set up (unless you get some canned maps). The global injector trim feature is awesome for global richening/leaning after adjusting fuel pressure.

I would say that compared to the microtech, a megasquirt is simple in every way. I would argue that Haltech setup is easier (they even include a rotary setup section in the help file). I can also tell you that you get either idle air control or ignition control (Unless they fixed that in V3) on a megasquirt.

The big downside to the megaquirt is the lack of fuel mix vs. air temp maps, fuel mix vs. coolant temp maps and ignitiong timing vs intake air temp maps. Basically, the megasquirt can adjust based on these values, but it only uses a linear formula.

In a nutshell:
Microtech = Really expensive, Complicated setup to get running, amazing adjustability once you get it running
Haltech = Pretty expensive, Simplified and easy setup, good adjustability once running (only missing the ability to run negative split on E6X).
Megasquirt = Less expensive, complicated to setup and get running, limited adjustability once running (although I think you can run negative split).

Unless you are a really big fan of the open source nature of the megasquirt, I would go with a Haltech (that is actually what I did).

The choice is still yours in the end. Do some research, download Halwin and the megasquirt software (megatune?). (I don't know if the microtech software is readily available for download or not, I only fooled with it on a friend's car.)

03-01-2009, 07:41 PM	#1
lcrotaryracer Rotary Fan in Training Join Date: Oct 2008 Location: lenoir city, TN iTrader: (0) Posts: 63 Rep Power: 17	need some info on mega squirt ecu like the title says some info on a mega squirt ecu. if any one that has one or knows about them can give me some general info i'd appreciate the help. thanks __________________ you can always have fun in a rx7

03-01-2009, 09:01 PM	#3
lcrotaryracer Rotary Fan in Training Join Date: Oct 2008 Location: lenoir city, TN iTrader: (0) Posts: 63 Rep Power: 17	na for now, but iam going to get a turbo engine later. i want to learn how to tune a car be for then. if i mess up it will not be so bad. s4 87 __________________ you can always have fun in a rx7

03-01-2009, 09:17 PM	#5
Whizbang Respecognize! Join Date: Jul 2008 Location: Δx = ħ/2Δp iTrader: (5) Posts: 3,190 Rep Power: 20	im going to have a write up on this i think once i finish my MS unit. Really not much left to do but i want to check it over for a few things. __________________ For current updates and event coverage check out Follow on Twitter! @WhizbangRally Whizbang Rally's Webpage \| Facebook

03-01-2009, 11:21 PM	#6
NoDOHC The quest for more torque Join Date: Sep 2008 Location: Sheboygan, Wisconsin iTrader: (1) Posts: 855 Rep Power: 17	I did megasquirt on a motorcycle. It used an 8X8 map (manifold pressure vs RPM for fueling and a similar map for ignition advance. The ignition trigger is a little funny (may need to tweak resistance on the on-board filter). Basically, it is the simplest, quickest and easiest ECU to tune, probably the hardest to set up (unless you get some canned maps). The global injector trim feature is awesome for global richening/leaning after adjusting fuel pressure. I would say that compared to the microtech, a megasquirt is simple in every way. I would argue that Haltech setup is easier (they even include a rotary setup section in the help file). I can also tell you that you get either idle air control or ignition control (Unless they fixed that in V3) on a megasquirt. The big downside to the megaquirt is the lack of fuel mix vs. air temp maps, fuel mix vs. coolant temp maps and ignitiong timing vs intake air temp maps. Basically, the megasquirt can adjust based on these values, but it only uses a linear formula. In a nutshell: Microtech = Really expensive, Complicated setup to get running, amazing adjustability once you get it running Haltech = Pretty expensive, Simplified and easy setup, good adjustability once running (only missing the ability to run negative split on E6X). Megasquirt = Less expensive, complicated to setup and get running, limited adjustability once running (although I think you can run negative split). Unless you are a really big fan of the open source nature of the megasquirt, I would go with a Haltech (that is actually what I did). The choice is still yours in the end. Do some research, download Halwin and the megasquirt software (megatune?). (I don't know if the microtech software is readily available for download or not, I only fooled with it on a friend's car.) __________________ 1986 GXL ('87 4-port NA - Haltech E8, LS2 Coils. Defined Autoworks Headers, Dual 2.5" Exhaust (Dual Superflow, dBX mufflers) 1991 Coupe (KYB AGX Shocks, Eibach lowering springs, RB exhaust, Stock and Automatic)