Anyone messed around with megasquirt EFI?

scp616 · July 27th, 2009, 11:07 AM

I'm about to build a centrifugal supercharged 4 valve taken to a 5 liter as soon as i sell this damned corvette. I ran all the specs through my engine analyzer and it says it's peak hp will be 775 with a peak torque of 632 ft lbs

Needless to say I'm going to be in need of some serious fuel at peak boost and since megasquirt utilizes a wide-band o2 sensor to achieve the proper AFR and a map sensor to measure boost to adjust ignition timing, it seems like the most advanced system i could possibly use and DEFINITELY the cheapest! However, currently it'll only work (at least the best for my application) with ford's EDIS ignition system as the coil-on-plug sequencer is still in the prototype stages and also is going to cost quite a bit more =P
It would be great if someone had used megasquirt before or if anyone foresees any problems with the EDIS ignition

Thanks,
Scott

Fluffy The Rhino · July 27th, 2009, 09:17 PM

Megasquirt? Sounds like a Ron Jeremy automotive product.

treblruh · July 27th, 2009, 09:48 PM

lol^

Mach Boy · July 27th, 2009, 11:36 PM

I don't hear about many Mustang owners using it, but from what I've heard it is a very good and user friendly tuning system.

ReverendDexter · July 27th, 2009, 11:50 PM

I'd try asking either on the GRM boards or the official megasquirt boards. That last one has the advantage of having the two guys that originally made it as members.

Matt Cramer · July 28th, 2009, 09:48 AM

Originally Posted by scp616

I'm about to build a centrifugal supercharged 4 valve taken to a 5 liter as soon as i sell this damned corvette. I ran all the specs through my engine analyzer and it says it's peak hp will be 775 with a peak torque of 632 ft lbs
Needless to say I'm going to be in need of some serious fuel at peak boost and since megasquirt utilizes a wide-band o2 sensor to achieve the proper AFR and a map sensor to measure boost to adjust ignition timing, it seems like the most advanced system i could possibly use and DEFINITELY the cheapest! However, currently it'll only work (at least the best for my application) with ford's EDIS ignition system as the coil-on-plug sequencer is still in the prototype stages and also is going to cost quite a bit more =P
It would be great if someone had used megasquirt before or if anyone foresees any problems with the EDIS ignition

Thanks,
Scott

You could use a wasted spark coil pack, but it's possible to make an EDIS module drive the COPs - and it's been done on 4.6s making the same power level you are, too. We've got an article on how that's done here:

How to MegaSquirt your Ford Mustang

scp616 · July 28th, 2009, 10:38 PM

I appreciate all the help ya'll
I've been all over that DIY site and hadn't seen the section on the 5.0, thanks for pointing it out.
I'm more of the mechanical type than the computer type so i've been a little confused as to what questions to ask on the megasquirt site, still doing my research so i don't look like a dumbass haha

scp616 · July 28th, 2009, 10:46 PM

"You could use a wasted spark coil pack, but it's possible to make an EDIS module drive the COPs - and it's been done on 4.6s making the same power level you are, too. We've got an article on how that's done here:"

Thanks again, that article answered a TON of questions including that i will still have to keep the stock computer
I think i'll investigate using th EDIS to drive COPs, but it said i would be drawing double the voltage from the power supply (i still do not fully understand why that is...) so i may end up running coil packs and plug wires

Matt Cramer · July 29th, 2009, 09:47 AM

It fires the coils a little differently from the stock firing scheme. We haven't really seen any problems come from this, just wanted to make people aware of it.

The EEC-IVs can control a huge number of things. The dash on later Mustangs is pretty much entirely computer driven instead of reading straight from sensors.

scp616 · August 25th, 2009, 01:37 PM

Will sharing sensors between the factory ecu and the megasquirt cause incorrect readings? Since sensors work by variable voltage, won't two different leads decrease the signal strength and cause things to act weird?

Safi · August 25th, 2009, 05:26 PM

Originally Posted by scp616

Will sharing sensors between the factory ecu and the megasquirt cause incorrect readings? Since sensors work by variable voltage, won't two different leads decrease the signal strength and cause things to act weird?

Typically you will want to make each ecu work on specific things and not share them.
If you go onto the megasquirt site I know there is a specific page on how to set up the megasquirt along side with the stock ecu.

Mustang RacR94 · August 31st, 2009, 09:29 AM

isnt it just a shitty universal standalone type of deal, dont use it. just use SCT for now and save up for something along the lines of FAST or AEM standalone if thats the way you want to go. AEM is my personal favorite to use and I like using there tuning software the most.

scp616 · August 31st, 2009, 12:47 PM

It's a lot more sophisticated than most after market computers, the main reason i want to use it is because it uses a wide-band 02 sensor, so there's no chance of my engine running lean

July 27th, 2009, 11:07 AM	#1
scp616 Regular 2002 Mustang GT Join Date: Mar 2009 Location: SC Posts: 326 iTrader: 0 reviews	Anyone messed around with megasquirt EFI? I'm about to build a centrifugal supercharged 4 valve taken to a 5 liter as soon as i sell this damned corvette. I ran all the specs through my engine analyzer and it says it's peak hp will be 775 with a peak torque of 632 ft lbs Needless to say I'm going to be in need of some serious fuel at peak boost and since megasquirt utilizes a wide-band o2 sensor to achieve the proper AFR and a map sensor to measure boost to adjust ignition timing, it seems like the most advanced system i could possibly use and DEFINITELY the cheapest! However, currently it'll only work (at least the best for my application) with ford's EDIS ignition system as the coil-on-plug sequencer is still in the prototype stages and also is going to cost quite a bit more =P It would be great if someone had used megasquirt before or if anyone foresees any problems with the EDIS ignition Thanks, Scott __________________ 02 GT --> long tube headers w/ x pipe and flow masters, throttle body w/ intake plenum, cold air intake, short throw, 255 nitto 555's all around, 373 diff gears, 2 inch lowering kit w/caster camber plates, sony radio working with stock system

July 27th, 2009, 09:17 PM	#2
Fluffy The Rhino Bearer of Bad News I has mustang and legacy. Slower than my Ruger. Join Date: Sep 2007 Location: The Fuckening Posts: 2,377 iTrader: 0 reviews	Megasquirt? Sounds like a Ron Jeremy automotive product. __________________ ~MOD NUTSWINGER~ My Tongue Soothes Razorburn STOPSAYINGFAIL.COM EVERY FART IS A GAMBLE Just Think Of Me As A White Blood Cell.

July 27th, 2009, 09:48 PM	#3
treblruh Regular New 99 SVT Cobra Vert! Dunno Join Date: Apr 2009 Location: Tulsa,Oklahoma Posts: 243 iTrader: 0 reviews	lol^ __________________ Go Pokes! MM Cobra Club #33 VERT CREW #02

July 27th, 2009, 11:36 PM	#4
Mach Boy MM's Orangest 2004 Mach 1 Mustang Join Date: Sep 2007 Location: Indy Posts: 2,846 Blog Entries: 1 iTrader: 1 reviews	I don't hear about many Mustang owners using it, but from what I've heard it is a very good and user friendly tuning system. __________________ Looking for 03/04 4V ABS Wiring Harness Connector/Incomplete Wiring Harness (with ABS connector)

July 27th, 2009, 11:50 PM	#5
ReverendDexter Priest of the Car Gods Clapped-out '90 GT 'vert ~5.5 seconds off TTOD :( Join Date: Jan 2007 Location: Rohnert Park, CA Posts: 13,808 iTrader: 0 reviews	I'd try asking either on the GRM boards or the official megasquirt boards. That last one has the advantage of having the two guys that originally made it as members. __________________ O o /¯/______________________ \|BLAAAAAAAAAAAAAAAAAAAAAAAAARGH!!! \_\

July 28th, 2009, 10:38 PM	#7
scp616 Regular 2002 Mustang GT Join Date: Mar 2009 Location: SC Posts: 326 iTrader: 0 reviews	I appreciate all the help ya'll I've been all over that DIY site and hadn't seen the section on the 5.0, thanks for pointing it out. I'm more of the mechanical type than the computer type so i've been a little confused as to what questions to ask on the megasquirt site, still doing my research so i don't look like a dumbass haha __________________ 02 GT --> long tube headers w/ x pipe and flow masters, throttle body w/ intake plenum, cold air intake, short throw, 255 nitto 555's all around, 373 diff gears, 2 inch lowering kit w/caster camber plates, sony radio working with stock system

July 28th, 2009, 10:46 PM	#8
scp616 Regular 2002 Mustang GT Join Date: Mar 2009 Location: SC Posts: 326 iTrader: 0 reviews	"You could use a wasted spark coil pack, but it's possible to make an EDIS module drive the COPs - and it's been done on 4.6s making the same power level you are, too. We've got an article on how that's done here:" Thanks again, that article answered a TON of questions including that i will still have to keep the stock computer I think i'll investigate using th EDIS to drive COPs, but it said i would be drawing double the voltage from the power supply (i still do not fully understand why that is...) so i may end up running coil packs and plug wires __________________ 02 GT --> long tube headers w/ x pipe and flow masters, throttle body w/ intake plenum, cold air intake, short throw, 255 nitto 555's all around, 373 diff gears, 2 inch lowering kit w/caster camber plates, sony radio working with stock system

July 29th, 2009, 09:47 AM	#9
Matt Cramer Authorized Vendor Join Date: Sep 2008 Location: Covington, GA Posts: 354 iTrader: 0 reviews	It fires the coils a little differently from the stock firing scheme. We haven't really seen any problems come from this, just wanted to make people aware of it. The EEC-IVs can control a huge number of things. The dash on later Mustangs is pretty much entirely computer driven instead of reading straight from sensors. __________________ Matt at DIYAutoTune.com - Megasquirt ECUs, fuel pumps, injectors, widebands, and more Now offering Mustang specific Megasquirt packages!

August 25th, 2009, 01:37 PM	#10
scp616 Regular 2002 Mustang GT Join Date: Mar 2009 Location: SC Posts: 326 iTrader: 0 reviews	Will sharing sensors between the factory ecu and the megasquirt cause incorrect readings? Since sensors work by variable voltage, won't two different leads decrease the signal strength and cause things to act weird? __________________ 02 GT --> long tube headers w/ x pipe and flow masters, throttle body w/ intake plenum, cold air intake, short throw, 255 nitto 555's all around, 373 diff gears, 2 inch lowering kit w/caster camber plates, sony radio working with stock system

August 31st, 2009, 09:29 AM	#12
Mustang RacR94 MM Fanatic 99 cobra N/A Join Date: Dec 2006 Location: Fayetteville NC Posts: 3,169 iTrader: 0 reviews	isnt it just a shitty universal standalone type of deal, dont use it. just use SCT for now and save up for something along the lines of FAST or AEM standalone if thats the way you want to go. AEM is my personal favorite to use and I like using there tuning software the most. __________________ 99 Cobra 03 Cobra motor AFCO H/E Pulley JLT CAI BBK L/T off road H/steeda catback SCT MAF Tune 03 cobra pumps HVGC

August 31st, 2009, 12:47 PM	#13
scp616 Regular 2002 Mustang GT Join Date: Mar 2009 Location: SC Posts: 326 iTrader: 0 reviews	It's a lot more sophisticated than most after market computers, the main reason i want to use it is because it uses a wide-band 02 sensor, so there's no chance of my engine running lean __________________ 02 GT --> long tube headers w/ x pipe and flow masters, throttle body w/ intake plenum, cold air intake, short throw, 255 nitto 555's all around, 373 diff gears, 2 inch lowering kit w/caster camber plates, sony radio working with stock system

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