G head cal and info

[moparzrule]

I'm just posting up sharing my experiences on making a G head cal. I used the CEL flash on knock to determine maximum advance, but you will be shocked just how much I had to add!
I started off with a base cal, the 89 2.2 MTX +40 3 bar cal. When I first started out, I knew this was a swirl head cal, so I took this base cal and added 5 degree's across the board. Well, my car felt like an absolute dog so I got worried. So, I added another 5 degrees. Felt better, but still crappy plus EGT's were sky rocketing even with 10-10.5:1 A/F ratios. This went on and on with weeks of trial and error.
So, I finally have a cal now that keeps EGT's in check (1600 at 15 PSI so far, I have forged pistons) and now I have plenty of low end grunt even with a setup meant for high RPM.. I took pics, I have the base cal loaded and my cal as a comparison. Take a look-
Advance from Map full throttle (base cal had -5 degrees at 0 PSI, my cal has +27 degrees at 0!!!)
http://i105.photobucket.com/albums/m216/87wagon/Advancefull.jpg

Advance from Map Part throttle (base cal had -1.5 degrees at 0, my cal has +23 degrees)
Also note that at idle I have 30 degrees, but at -24 to -30'' vacuum I drop it back to 10 degrees. I've found that upon deceleration the retarded timing keeps it from popping out the exhaust so much.
http://i105.photobucket.com/albums/m216/87wagon/Advancepart.jpg

Advance from RPM2 table (added a few degrees at idle rpms, but ramp it up at ~1200, this drastically increases spoolup and low end power in general)
http://i105.photobucket.com/albums/m216/87wagon/AdvanceRPM.jpg

[cordes]

How do your changes compare to the stock G-head cals?

[risen]

alt-printscreen will take a screenshot of your current window to the clipboard. You can then go and paste it into paint (new image, and control-v). Much easier than taking pictures.

[moparzrule]

How do your changes compare to the stock G-head cals?

Still way more. The stock G head cal is only slightly different than the swirl. One thing to remember, I'm running a G head with swirl pistons, so the compression is a good bit lower.

[moparzrule]

alt-printscreen will take a screenshot of your current window to the clipboard. You can then go and paste it into paint (new image, and control-v). Much easier than taking pictures.

I do the tuning on my laptop, so it's from a different computer.

[cordes]

Still way more. The stock G head cal is only slightly different than the swirl. One thing to remember, I'm running a G head with swirl pistons, so the compression is a good bit lower.

Gotcha. I didn't even think about that.

[tryingbe]

Would you post your cal file? Easier to compare that way.

[moparzrule]

I don't know how to put it into a folder and zip it...I could email you the BIN and TBL files.

[moparzrule]

I may have figured it out....

[tryingbe]

http://www.aplusfreeware.com/categories/LFWV/PowerArchiver.html

Install that and you'll be able to zip up the files into one zip file.


Where's the calx file?

[moparzrule]

I use D-cal....

[t3rse]

I've always preached the need for more timing on inefficient heads...easiest way to raise cylinder pressures safely.

[MiniMopar]

That's the way you do it. Trial and error a little at a time. Good work!

[moparzrule]

Please note to anyone going to use this cal, it will probably need tweaked for your setup. This is just a lot closer to what you will need than any other cal, will only require fine tuning rather than major fixing.
Also note, a G headed 2.5 requires just as much timing in the full and part throttle tables, it just has less timing in the RPM2 table.

[Aries_Turbo]

so the one you posted is for a 2.2L G-Head?

edit.... nevermind. i just downloaded it lol.

Brian

[moparzrule]

I have a revision here, had a little too much timing from -20'' to -10'' of vacuum, and a little too much in the RPM2 table. It made it miss alot while cruising with light throttle. It's better now-

[Juggy]

I soooo need to get my car on the road soon :) if my TU cal doesnt work too well (dyno tuned from a diff setup) this may be better alternative

I need some chips for 89 SMEC...i only have sockets for the 87 LM here....

[Aries_Turbo]

what chips do you have. sst 27sf512 works in both of them and they are 1.45$ from www.mouser.com. see my cal basics article in the knowledge center for the link right to the page to buy.

Brian

[moparzrule]

+1 for mouser. Fast shipping too.

[moparzrule]

I'm starting to work on getting a turbonator cal together as well. After I get this one tuned well I'll move on and see how the turbonator cal works with the G head.

I got really tired of taking the ECU out every time I wanted to change the chip, so I bought a chip extender and cable from Moates-
http://www.moates.net/product_info.php?cPath=26&products_id=172

http://www.moates.net/product_info.php?cPath=50&products_id=64

Hope it works well, just ordered it yesterday.

[amcpacer]

I am currently testing a modified turbonator LM calibration for my G-Head 2.2. My timing should be different from yours since I am running the correct 1985 mahle pistons with the G-head. I am still trying to get it to start up without having to crank the starter for 10 seconds. It also runs super rich during warmup chugging out black smoke. The eeprom programmer is getting some use. I actually used your timing curves as a baseline comparison cal. The laser has water injection so there will be less fuel when in boost.

[moparzrule]

Any update on your testing?

I haven't tried the turbonator yet, still getting my current cal setup so I can atleast just get the car going well. Then I want to try the super 60 roller cam I got from Simon, so it will be a awhile until I test turbonator.

[amcpacer]

I am having difficulty with fuel mixtures. I made a post for help in the EFI Tuning section.