Spark Table advanced for megasquirt? Help please

[GSTurbo1]

Ok guys, so my spark table for megasquirt is using the stock parameters for the 420a which is extremely aggressive... can anyone show me what a map should be close to tuned for a small 16g tuned around 15psi? Or can anyone help me understand how to tune it or can it really only be tune on a dyno?

 

[VelocitàPaola]

You need a dyno (or similar) to completely optimize the spark map, but there are some good rules of thumb here:

MS2/Extra Tuning guide

There are also other known good sample maps here:

MSQ File Repository - SymTech Laboratories

 

[LeeSD1]

In the MSQ repository my tune is the DonLee one and its just the 420a base tune table just tuned down a little so its not as aggressive.

 

[GSTurbo1]

Ok cool, i'm going to try to find a nice one there

 

[Slo2gen]

I would HIGHLY advise against getting a spark map off the internet and running 15psi. As stated before, you really need to tune the car on the dyno at that boost level, or you will more than likely be replacing pistons again...

 

[GSTurbo1]

it so expensive to get dyno tuned it's crazy... if I only had a dyno. If I meth inject I should be fine.

 

[Josh97eclipse]

Do it right man, you just dumped a good amount of money into the thing, you dont want to be back at square one again. Slo2gen will not point you in the wrong direction.

 

[Slo2gen]

Lets see, 400 for a dyno tune, or another 1500 for a rebuild again in 6 months when you melt another piston.....

 

[LeeSD1]

Ok guys, so my spark table for megasquirt is using the stock parameters for the 420a which is extremely aggressive...

Which spark table did you use? I ran the stock one that is provided by symtech for about 6 months after i installed MS and never had a problem. Goes to show all motors are different i guess.

 

[xceler8]

My advice,
Fix any issues the car is having prior.
Find a reputable tuner with a dyno that is familiar with the MS
Pay them 3-500 to tune it.

If you have never tuned a car before or are very familiar with the concepts, don't do this yourself. You will break something and it will cost you money and time. I only tune this car. My other I put in the hands of people who do this everyday and set records doing so. It's worth it.

My tune is constantly changing. I literally drove my car to work everyday logging it with my laptop. Looked at it at lunch made changes and logged it home. I'm at a good place where I can pound on it and never have to look at my gauges. Then you run into the problem of maintenance on the car and things breaking or in our case leaking cause it's a dsm!

my .02

Rob

 

[LeeSD1]

The 420a is a DSM?!? To the OP until you get on a dyno just run a safe spark adv. table and maybe a tad bit rich. That well help limit detonation.

 

[turboglenn]

My advice,
Fix any issues the car is having prior.
Find a reputable tuner with a dyno that is familiar with the MS
Pay them 3-500 to tune it.

If you have never tuned a car before or are very familiar with the concepts, don't do this yourself. You will break something and it will cost you money and time. I only tune this car. My other I put in the hands of people who do this everyday and set records doing so. It's worth it.

My tune is constantly changing. I literally drove my car to work everyday logging it with my laptop. Looked at it at lunch made changes and logged it home. I'm at a good place where I can pound on it and never have to look at my gauges. Then you run into the problem of maintenance on the car and things breaking or in our case leaking cause it's a dsm!

my .02

Rob

+1000 this is what i did too, laptop was in the car for the last 12 years more than a passenger has been , and i just dove into tuning headfirst in the shallow end when i put accell DFI on my homne turbo'd mustang 5.0 back in 1998when i was just 21 years old, I had known a bit about tuning from reading back then but back then most tuning was retarding a distributor for boost and FMU fuel gains (how ghetto and to think these things are still used scares the hell out of me)

tuning is something you either invest in yourself to the amount of how much stuff you break (and eventually you will pop some parts and gaskets unless you're content to run in ulra conservative mode, but no DSM'er ever is for long lOL) OR you pay some one to "set it so you can forget it" personally i'm always striving to attain higher goals, learning and most everything, so paying some one else wasn't in my genetics, learning the hard way was

here's about 15+ years later, many seminars and being a dealer for haltech and a trained EMIC for accell at one point and i still learn things tuning my own car and others and i've been tuning mine as stated CONSTANTLY since tearing out the ECU and wiring in my first E6k in the parking garage of my college girlfriends apartment in january witha butane soldering iron , all because i hated the DSM knock sensor and the fact making a good pull was like pulling thehandle on alsot machine... every third of fourth pull would be enough to keep you interested ad the other 3 were just dis-satisfying