Megasquirt file

[vrinner]

Way to go Vince! But I got to say I'm disappointed! I had collected all my change and had saved a bunch of pennies to buy your car when it went up for sale......

Ha ha...I was ready to let it go for pennies on the dollar, another month of not running would have ended up in Vince buying a bulk pack of sawz-all blades, a bottle of tequilla, and a pile of metal and fiberglass.

But now it's on to tuning this thing...

So now I've got it so it runs here are the issues;

1. The car on jack stands so no real load on the engine while testing
2. Real rich on the low end, and real lean on the high end.
3. Wide band 02 sensor mounted at the bottom of my downpipe just as it makes the turn to the back of the car.
4. AFR on Megatune and in the Lambda data logger show the AFR is all over the place...even at just idle. Typically jumps from 7.5-8.5 just idling. As soon as you give it some gas, it jumps way lean.
5. We messed around a lot with the fuel settings and couldn't get it to lean out on the low end.

Does anyone have a .msq file they can send me with a setup similar to mine. Here is what I have;

53lbs RC Engineering injectors, brand new
Custom ground cam (dont know the exact specs)
Ported and polished everything...plus big valve head
T4 Turbo
60mm Throttle Body
Stock bottom end

Ken...I know you had it programmed to run in your car prior to sending it to me however we have made so many changes that I'm not sure what is what. I guess its the VE tables and such that may be the issue.

[fastmonkeywheels]

Vince, very seldom will someone else's VE table work in another car. Speed Density systems are not nearly as adaptive as VAM/MAF systems. If I were you I'd set my AFR table up how you want it, then take a datalog and run it through Megalogviewer a few times (different logs through, not the same one). After you do that it should help.

You should start reading the megamanual for tuning information. Start with acceleration enrichment turned off and don't stab the throttle. What kind of vacuum are you pulling at idle? Also, have you verified your timing yet?

Getting it running is the easy part, lol. Getting it running well takes lots of time and patients.

[vrinner]

Hey guys...I hate to say this, but all this MS stuff is simply BS for a guy like me. I am totally in over my head on this and dont have a freakin clue on what to do next. I read through the Megamanual a couple of times and I'm still confused on what to do. The guy who came and helped me get the car started doesn't know what to do about it either. He was ripping through screens, adjusting this, tweeking that, the thing is still running rich and the AFR is all over the map.

I think that MS just isn't for me. Plug and play...thats what I need. I think I fooled myself into thinking that it would be easy to deal with.

Are there any other systems that are EASY to tune or should I just go back to my stock setup? Hell...I'm only shooting for 300hp anyways.

And before you say it, this isn't just a couple of days worth of frustration here, this is months and months of just trying to get it running and then realizing that it's just way to technical for me. I could care less about AF ratios, VE tables, Lambda sensors or spark advance. I just want to drive this thing.

Any suggestions on an EASY system would be greatly appreciated.

[sar4497]

MegaSquirt is probably one of the easiest once you have the thing built and configured for your car. The hard part is (theoretically) over for you. I suspect that you are closer than you think, but EEC-IV tuning might be more up your alley.

[fastmonkeywheels]

I'd have to agree, a MAF based EEC-IV might be a better fit for you. All of the drivability is there already, you just have to work on the in boost stuff a bit.

I find it hard to go for a drive in the SVO without the laptop hooked up. Not because it needs it, but because I'm always tweaking something to make it a little better (or worse sometimes). It's a great system, but if your goal is 300hp and ease of use, the EEC might be the way to go.

[Horsewidower]

Oh, I so know what you're going through. I've thought about going back to an EEC-IV many times. Given your stated desire to not get into ve tables, timing maps, lambda sensors etc. you should probably change back. BUT, once you figure those things out, you will have a computer that will grow with your desire to increase HP/TQ.

A couple of quick thoughts:

Shut off all the correction maps. You can chase your tail because they are there to modify your fuel table based on conditions.

Only try to tune when the car is up to operating temperature.

Find a dyno operator that is familiar with MS. You cannot tune the car with out having it under a load. Yes, you can play with idle AFRs but that's about it.

Set your start up timing to 10 degrees and then set everything else to 20*, then ignore it until you have the fuel table finished.


Bob

[8T6 SVO]

Vince,

I think you are very lucky to have the expertise and offering of help from Bob.

[vrinner]

Vince,

I think you are very lucky to have the expertise and offering of help from Bob.

Just wish Bob lived in Fullerton!

[vrinner]

I'd have to agree, a MAF based EEC-IV might be a better fit for you. All of the drivability is there already, you just have to work on the in boost stuff a bit.

I find it hard to go for a drive in the SVO without the laptop hooked up. Not because it needs it, but because I'm always tweaking something to make it a little better (or worse sometimes). It's a great system, but if your goal is 300hp and ease of use, the EEC might be the way to go.

With EEC-IV...do I have to go back to the distro?

[fastmonkeywheels]

Nope, you can go DIS, but that requires different sensors, lol. Same coil pack but no 36-1 wheel.

[vrinner]

Nope, you can go DIS, but that requires different sensors, lol. Same coil pack but no 36-1 wheel.

I've posted over at MSEFI to see if there is anyone local to me with a dyno who I can pay to get it running properly.

[fastmonkeywheels]

Also, try msextra.com.

[tateg]

I've posted over at MSEFI to see if there is anyone local to me with a dyno who I can pay to get it running properly.

Is it at all drivable? If so, you can set your timing way back as previously suggested and datalog your your system. Then run it all through megalogviewer (a free download) and let the software tune it for you. It will get your off boost VE table in shape for you. Then you can give it judicious boost until you get that part of the table in shape. That's pretty much how I tuned my MS1 since the BamaFuel "base tune" wasn't even close for my setup. His was stock turbocoupe and mine is a, comparatively, radical setup.

If this is a race only car you are stuck doing all the tuning on a dyno I guess. You have to be able to put it under a load to tune it correctly. I still recommend the megalogviewer program though. It's far superior to the autotune function in MS and you don't really have to know anything about VE tables to make it run right. You only have to be able to setup your AFR targets and your timing at given rpm and boost levels. Really simple stuff.

[Horsewidower]

http://www.westechperformance.com/

These guys are right near you:

http://www.focussport.com/about.htm

Some more:

http://www.gruppe-s.com/Contact/service.htm

http://www.wotperformance.com/index.php?option=com_content&task=view&id=5&Itemid=6

There are lots of options for you. I'd only go to one that has experience with turbos and mega squirt. My immediate thought would be to go to Westech.

Bob

[vrinner]

http://www.westechperformance.com/

These guys are right near you:

http://www.focussport.com/about.htm

Some more:

http://www.gruppe-s.com/Contact/service.htm

http://www.wotperformance.com/index.php?option=com_content&task=view&id=5&Itemid=6

There are lots of options for you. I'd only go to one that has experience with turbos and mega squirt. My immediate thought would be to go to Westech.

Bob

Emails sent. I contacted WOT Performance today and they dont do MS. I guess I havent given up on it if I can get someone else to tune it. I'd pay for a plane ticket Ken...