well I have been building a 305 for the past few months and I decided to go with the ms2 ignition but im having problems with setting up a tune it just don't make sense I even bought a book on tuning. if anyone could help by guiding me through it or even by sending me a copy of a base tune It would help a bunch thanks guys



yes I said 305 and its going to stay that way its a street car not my drag car and it has a 400 in it

 

Your question is a bit vague, do you have a more exact question? I wouldn't mind giving you a base map to use, but there is a lot more info needed. Has the MegaSquirt started the engine? Does it start and then die? Start but run poorly? Was the MegaSquirt professionaly assembled or checked with mega stim?

 

What are the engine specs ? I also have a pretty hot 305 ... but I use ebl flash so my base bin don't work for u ... cam specs ?heads ?compression ? etc...

 

maybe some info here to help...https://www.thirdgen.org/forums/diy-...uide-book.html

 

thanks guys and ill answer your questions the best I can. the mega squirt has not started the car. I have haven't finished the base tune. I have bits and pieces done of it. its a lo3 factory bottom end 58cc swirl port head 198 150 valves Stock L31 Vortec 350 (5.7L) cam specs are
10241264 casting number
Intake lift- .414"
Exhaust Lift- .428"
Intake duration @.050"- 191*
Exhaust Duration @ .050" - 196*
Lobe Centerline- 111
and tpi with 22 pound injectors also using the hei disturber
I hope some of this help

 

its a junk yard build

 

I would suggest you download the free version of TunerPro and look at the stock 305 or AUJP bins. You can mimic the spark and VE tables. On the MegaSquirt forums there may be some members who will give you a TPI file, all of my files are for larger multi port efi engines making north of 350 rwhp . I can give you some startup values that should get the engine started. If the mMegaSquirt wasn't professionally assembled I highly suggest getting the stimulator then hook everything up and make sure all of your sensors pass the sanity test.

 

man that's so much help thank you

 

If u would a went with ebl flash instead a megssquirt it woulda been running the first day and alot more ppl Here could a helped including me aldo ebl is about half the price of megasquirt and is just as good if not better for beginners IMO

 

Don't try to make this into a pissing match between ECMs as that is not the intent of this thread. It sounds as if you have no real knowledge of MegaSquirt and if you have nothing to help the OP other than criticism then don't post.

 

well I cant get tunerpro to work on my laptop I think it because of windows 8 any other tips

 

Useful info on idle settings:
http://www.diyautotune.com/tech_arti...le_tuning.html

Initial startup:
http://www.msextra.com/doc/ms3/firststart.html
http://www.msextra.com/doc/ms2extra/...tml#start_idle

Those are all assuming that your MegaSquirt is working 100% correct and the wire harness and sensors are all working and in spec.

 

ok that works too ill see what I can do thank you

 

I'm not trying to make a "pissing match " I'm stating facts ! And u are correct I do not have much knowledge of megasquirt and don't care too as it is not a neccesity at my power level ...

 

Tuner Pro works with Win 8.

I think any issues when using Win 8 is a simple setting change, do a quick search on the Tuner Pro forums for Win 8 settings.

Just to a final end to the EBL vs MS II thing, the MS II is actually less expensive than the EBL. I will not comment on functionality differences, since it's not important.

OP: You mentioned "MS II Ignition" in the original post, are you using this strictly for ignition, or did you mean something else there?

 

im not sure y i put the i was working on the ignition setup when i was typing that but im trying to find a tune just to look at and is the ms2 able to do a two step and a flat shift

 

Did u ever get tuner pro working ? If u did I can email a copy of my 305 bin for u to look through to get an idea of what some of the parameters are supposed to look like ... u can also pm Rbob to get a copy of the xdf files needed to do so

 

I'm no sure the bins wont load up on tunerpro

 

For u have the xdf files ?

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

 

no I didn't see any on their website

 

and I also thought I needed one or the other not both bin and xdf

 

I think I get a big f on this whole tuning ting should have stayed with carbs

 

o crap sleeper you told me to pm rbob I moved tis weekend and been busy ill pm him now

 

ok pm sent

 

To look at the data in a bin file you need to load an XDF. The XDF is like a road map to where things are in the bin so that it can be viewed in ways that make sense.

 

ok I understand now

 

and is tunerpro used for factory ecms

 

Should be able to use TunerPro for any ecm that came with these vehicles.

 

Yes u need the xdf files but idk if they will work with megasquirt .. his files are for the ebl system which u could still use them to view my bin to get an idea of what things need to look like

91' bird 305 TBI T-5, trick flow heads, 4.10 gears, full UMI setup, track times coming soon!

 

.XDF files cannot be used in MegaSquirt. They can however be used as a roadmap to set up a starting file in MegaSquirt. Bowling and Grippo originally used MegaSquirt on a GM TPI 350 so there is a file available somewhere on the MegaSquirt forums for you to start with. Often times they came preloaded with this on them. When I bought my MegaSquirt I ten years ago that was already loaded, same as when I bought MegaSquirt II but I can't recall what III was loaded with.

 

This should be enough to get you fired with some tweaks. The ignition curve will probably not be totally optimal by any means, but I haven't been able to put the effort into it as I keep breaking stuff. A few things to be aware of:

-This is for the "Extra" code. If you're using standard code I would definitely ditch it and go with the Extra code.
-Code levels can be temperamental at times. I would use the controller's code unless you export the tables and start over.
-It's possible the HEI settings will be wrong for your setup. There are a few ways of hooking HEI up to one of these. Check them against your manual to be sure.
-It's possible that there's stuff in there for a 4L80E. Just remove it in the CAN config. No biggie.
-The fuel will be fat above 3500 RPM or so. Expect to have to dial it back. A lot.
-There's no acceleration enrichment set. This shouldn't be a big deal for someone who's tuning as you shouldn't have it enabled until you get steady state sorted.
-If worse comes to worse you can always load it, export the tables you need and import them into your config.
-Injectors are set to 50lb/hr. *THIS WILL NEED CHANGED*
-WB should be set for an Innovative LC1.
-The warm up curve is probably off. Expect to have to fiddle with it a bit. My wager is pulling fuel out. It will probably not have an impact on starting, just one of those things you can tweak to make things run better down the road.
-I think base timing for the dizzy should be 6 degrees. You should definitely check that out though. A dial back timing light or a timing tape will let you do that easily.

 

I have experience with megasquirt also. To start with if you have gas and spark you should get it to fire. Are you able to tell if you have spark? Feel free to send me your tune if you'd like. Not saying I'm a pro but I have done a couple megasquirts now and some chip burning.

 

I'll throw in my tune here for you as well. It is for my 85TA which is a 350 TPI with 22# injectors with LT1 cam and vortec heads, so nothing too crazy.

This tune is setup for MSII with MS Extra 3.3.2 beta 3 which can be downloaded here

http://www.msextra.com/forums/viewto...p?f=91&t=53086

It is also setup for an MSII with the HEI mod done to it found here

http://www.diyautotune.com/catalog/p...kit-p-325.html

You can make your own like I did or buy the kit. There is a video on that page that shows how to install it. This makes for a more reliable trigger from a HEI module.

This tune does have have closed loop idle enabled where the system will try to make the engine run at a set speed. This should be turned off before you try anything.

Also this is setup for dual electric fans, reverse lockout, and also knock sensing. These can all be turned off in the spare ports section.

Hope this helps a little and feel free to ask any questions.