i need a step by step on extending my spark table to 6400rpm. i am using tunerpro rt $6E 165ecm. thanks in advance!

TunerPro has their own forum. You may want to ask this question there... I wish I could help, but I don't know how that stuff works.

Have you found a solution to this yet? I have not. I can get a fueling table (PE vs RPM) to go to 6400 but not a spark table. It seems you have to lock your spark in at 4800 on up.

To solve this problem for boost, I hooked up a MAP sensor to my Crane TRC-2 so my timing retard is boost referenced. That said, I'd like to do it with an extended timing table so if you find a 6E.xdf file with one let me know please.

this link from thirdgen.org has some info, but i don't understand how to do it-i'm still new to tuning:

http://www.thirdgen.org/techboard/diy ... 400-rpm.html?ref=esp-link

When I get the time I'll look into this. I'm into modifying a Greg Carroll Vortech bracket to increase belt wrap on a T trim.

If you go to tunerpro.net, there is a pretty good write-up explaining hex, and another one explaining editing it. I've only done it a couple of times and it was a long time ago so I'd have to figure it out again myself.

Figured this out and there is a thread we are in over on thirdgen, but wanted to post what we found here in case anyone is ever interested. So far it seems to work great, going to confirm when the snow melts and I can drive my car again. Matt may confirm it before me and save me the trouble. All is well in the chip and car idles nicely in the garage.

Open the .bin you are using. Save it as a different name, so if anything screws up, you still have your good .bin file.

Open your hex editor. If using TunerproRT, go to tools, advanced, hex editor. Go to location 0E97. (Scroll down till you find 0000E90. Then, count over 8 places (which is bit 7 since the first location in that row is bit 0). You will see it is number 58. Put the cursor in front of the 58, and type 59. The 59 will be red. Close the hex editor, save it when it asks.

Scroll down to your Spark Advance Table RPM vs LV8. Right click it, then select "Edit Item XDF Info". Click on the "Rows" tab. Click in the first row. You will see it is 400. Make it 0. Make row 2 400, row 3 800, etc. Keep increasing by 400 till you get to the last row, which will be 6400. Click apply, then close the window. Go to the XDF tab on the main page, then select Save XDF as, and save it under a new name. Go open the main spark table, and you will see it goes up to 6400. You will need to change your spark numbers as they will be the same as they were in their cells, but the rows rpm labels have changed therefore the spark has changed at many of the rpms.

I have also recently installed a hac that puts the wideband reading in the datastream, which is extremely helpful when tuning. Also, installed a hac that eliminates the injector pw cap that I didn't know existed till I hit it and saw no more increase in pw on the datalogs no matter how much fuel I added. A few threads over there if anyone needs info on doing this. If you need more than you can find ask and I'll help as much as I can.

Interesting....Good explanation above, but....

Everything I've heard is SBC's need and have full-advance set by 3000 rpms. Of course, I ignored that myself. But, only a hair. I added 1/2 deg or maybe a whole degree by the 4800 mark.

It seems logical to assume more advance is necessary as the engine spins higher and higher,,,but more than one person has said no.

Any more info on this?

Quote:

Really every engine is different as to how much timing it can take at a given RPM.

No matter what, you eventually reach a point where it lights the mixture off as correctly as it's gonna get.... Sicking more advance to it just hurts.

Will