how much timing with the blower?

the98stang · Aug 1, 2007

Hey guys I was wondering how much timing I should run with 100+ octane for the track this weekend. At 1.2 load here is my timing:

RPM's

3000- 10*
3500- 11*
4000- 13.5*
4750- 16*
5500- 19*

This is according to my borderline knock table from my SCT software. When I datalogged, the highest load I had was 1.4, but I can only change the values for 1.2 and 1.59 load. Any advice??

blacksheep-1 · Aug 1, 2007

The best advice I could offer
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the98stang · Aug 2, 2007

blacksheep-1 said:
The best advice I could offer
www.racerelated.com

Umm...I don't need a tuner, I have my own tuning software...

jstreet0204 · Aug 2, 2007

I dont know about the timing with the 100 octane. For 93 I have mine set to never go over 12 under load. One thing to keep in mind though, if you didn't already know, there are three timing tables borderline, base, and MBD. All of mine are set to the same values.

As far as the load values, you already have them rescaled to go over 100% load for your supercharger. You don't have to have a specific value for 1.4 you just estimate between the values you have on the graph, or you if you really wanted to, you could go into the normalize functions for those tables and rescale the load values, but I don't think it is needed.

the98stang · Aug 2, 2007

jstreet0204 said:
I dont know about the timing with the 100 octane. For 93 I have mine set to never go over 12 under load. One thing to keep in mind though, if you didn't already know, there are three timing tables borderline, base, and MBD. All of mine are set to the same values.

As far as the load values, you already have them rescaled to go over 100% load for your supercharger. You don't have to have a specific value for 1.4 you just estimate between the values you have on the graph, or you if you really wanted to, you could go into the normalize functions for those tables and rescale the load values, but I don't think it is needed.

Only 12 degrees? That seems kind of low. The timing was set to 19* @ 1.2 load and 5500 rpms on the SC tune from SCT. And I know about the MBD, BL, and base. As long as the values are all the same, the computer will use the BLK table values. This is what my BLK table looks like now. I only changed a few values @ 1.2 load. The 4000 and 4750 rpm values were changed.

View attachment 373669

jstreet0204 · Aug 2, 2007

the98stang said:
Only 12 degrees? That seems kind of low. The timing was set to 19* @ 1.2 load and 5500 rpms on the SC tune from SCT. And I know about the MBD, BL, and base. As long as the values are all the same, the computer will use the BLK table values. This is what my BLK table looks like now. I only changed a few values @ 1.2 load. The 4000 and 4750 rpm values were changed.

My tune is way on the safe side now since it is starting to get alot of miles on. My a/f ratio is also only 11:1. It looks like you are on the right track, I'd just ease up on it slowly until you get it where you want it.

how much timing with the blower?

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how much timing with the blower?

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