All right no flamers please. It's my money and I spent it on a Megasquirt 3 today. We drove from Knoxville to Suwanee GA and picked up the MS3, relay board, wiring harnesses and a wide band O2.
I'm wanting to learn tuning (I've been a mechanic for 40+ years on anything from airplanes to outboard motors) with the megasquirt.
Has anyone done an LN2 with MS 1/2/3?
Does anyone have a stock fuel map and ignition map for LN2?
If an LN2 map isn't available, how about a similar engine like a Toyota 22r?
Mine is a 1995 OBD 1.5 morphrodite from GM.
I'm planning a parallel installation with the stock sensors emulated by resistors or what ever per things I've been seeing on the MS websites/forums, etc.
Anyway, the goal is to MS the stock engine and build a performance engine as time and money permit.
Experts?
thanks,
Dennis
The only jbo member thats running ms off hand is whalesac but he's running an ld9. Not sure if it will be of any help but he maybe could show you a few things to help you out.
MS3 is still fairly new, and a bit overkill for our engines. So, you aren't going to find too many here who have used it. Most of us who use megasquirt use MS2 from what I've been able to tell over the years. Most who have used MS1, used it for fuel tuning only.
I used a base spark map from a Quad4 HO for my spark table. Considering you have an OHV, though, your spark and VE curves are likely to be much different. In MS2, there is a tool that will generate a fuel map based on certain inputs you provide (max hp @ xxxx RPM, max TQ @ yyyy RPM). It's far from perfect, but with a wideband, you can start datalogging and use a program like MegaLogViewer to quickly hone into your proper AFR's. There's really nothing for spark tables as far as I know. Your best bet is to have someone with an OHV engine build close to yours (or a stock OHV) and HPTuners provide you with their spark map. From there, you should start monitoring knock, and make adjustments as necessary (ideally on a dyno).
If you would like to know more, feel free to PM me.
I have no signiture
Ohh, I forgot to mention that mine is also a parallel installation on a 99' OBD2 LD9 PCM with an Autotrans.
I have no signiture
Whalesac wrote:Ohh, I forgot to mention that mine is also a parallel installation on a 99' OBD2 LD9 PCM with an Autotrans.
PRND321 Till I DIE
Old Motor: 160whp & 152ft/lbs, 1/4 Mile 15.4 @88.2
M45 + LD9 + 4T40-E, GO GO GO
ms3 is not overkill for our engines, its underkill for most engines.
If you know someone with hp tuners and a very similar setup 2.2 (97+ obviously). I can talk you through on how to use the hp tuners logger to make a set of base VE maps for the MS.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
Kronos Performance
WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer
I run a MS2 on my 3400. What you can do if you've got your setups on everything down pretty good, is have someone with HPT post up the screenshots of the VE and Timing tables, then just copy the numbers over into your tables. A bit time consuming, and not really ideal, but it''ll get ya going. Adjustments will be required though. (I did this with my 3400 swap)
Whalesac wrote:Ohh, I forgot to mention that mine is also a parallel installation on a 99' OBD2 LD9 PCM with an Autotrans.
Not to threadjack.... but if you don't mind my asking. Which ECU controls your cooling fan?
i find it amusing that SHOoff has nothing better to do but follow me around & be an unhelpful dick in even cross-forum. - Jon Mick
Leafy wrote:ms3 is not overkill for our engines, its underkill for most engines.
Among other things, we don't have VVT and we don't have COP, which are a couple of the main attractions to MS3. I have no interest in getting into another pissing match with you about Megasquirt's capabilities, so I'll leave it at that.
SHOoff wrote:
Not to threadjack.... but if you don't mind my asking. Which ECU controls your cooling fan?
MS2 controls my cooling fan.
I have no signiture
shooff. you cant just copy the hp tuners tables. for 1 thing they are going to be alpha-a. But even if you got to look at the gm speed density tune it is in MGVE and not Real VE. There is a somewhat straight conversion between the two but it would be pretty tedious to do even in excel.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
Kronos Performance
WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer
I ran it on a 95.5 You can pm me with questions if you like!
jason norwood wrote:I ran it on a 95.5 You can pm me with questions if you like!
Thanks for all the reply's from everybody.
Jason, thanks for the offer. PM sent.
dennis
Leafy wrote:shooff. you cant just copy the hp tuners tables. for 1 thing they are going to be alpha-a. But even if you got to look at the gm speed density tune it is in MGVE and not Real VE. There is a somewhat straight conversion between the two but it would be pretty tedious to do even in excel.
Like I said. It'll get him going. It's not ideal, and adjustments will be required. z9lots of them) I did it with my MS from a Grand Am in HPT. It needed a lot of adjustments, but it got me going. I don't have the luxury of towing the car to get tuned, or drive it somewhere close by to where I'd risk running it lean, hence why I did it.
i find it amusing that SHOoff has nothing better to do but follow me around & be an unhelpful dick in even cross-forum. - Jon Mick
How are you going to handle the conversion from alpha-n maps to speed density? Irrc there is an equation for it that lets you model the pressure drop across the throttle body at differet throttle positions and should let you convert tps values to map. Unless you can find the values from a 97 ln2 with the speed density tune.
1994 Saturn SL2 Home Coming Edition: backup car
2002 Chevy Cavalier LS Sport Coupe: In a Junk Yard
1995 Mazda Miata R-package Class=STR
Sponsored by:
Kronos Performance
WPI Class of '12 Mechanical Engineering
WPI SAE Risk and Sustainability Management Officer
I ran a couple of cars a while back and got a theoretical that would get you in the ballpark:
I forgot to add - the Ion would probably be much closer to theoretical if I created a filter to take out engine braking (seeing as it is a manual).
