Thread: Anything you ever wanted to know about tuning and electrical systems...

I'm bored and though this might be a useful exercise for any of you guys who want to know about tuning and electrical systems. So ask away and I will do my best to answer your questions. Seriously, anything.

Whats the max safe timing that you can run on a 8.5 DET block at WOT on say stock boost (7-9 psi) on 93 gas.

I've got it as high as 25*, am afraid of knock though, just don't know what to listen to.

At what RPM? Timing is a function of RPM too. You want to have lower timing down low because you have slower piston speed. The flame front has more time to propagate. At higher RPM you need to compensate by giving more timing so the mix so it has more time to burn fully.

Knock sounds like rocks shaking in a can.

But yes 25* at high rpm is a good starting point.

Also guys keep in mind, timing is a function of flow and charge temps, not pressure

Dan, do you know much about calculating K-values for changing MAF's and injectors? I'm getting ready to throw on my N60 and would like somebody with the know-how to double-check my work. Currently running a U13 Bluebird ECU, with the correct U13 Bluebird MAF. Have everything else ready. Also, currently running stock 3bar fuel pressure. If you know how to do any of this, let me know, and I'll post up the figures I've come up with!

Bring it. I don't have any experience with MAF tuning, but I will figure it out.

I like your style Dan! Thanks

Dan, how far away does my water/meth nozzel need to be from my IAT sensor. This will be my first car with water/meth and a stand alone.

Thanks
Mike

Where is your IAT sensor? I wended a bung on the bottom of my plenum to hide it and to get the most accurate temps. I would try to shoot for a good 12-18 inches just so the meth/water has some time to atomize. Generally the further you can go the better.

The whats more important is you don't have the meth injection close to a downward slope. I have seen intercoolers with water in them before

Also something to think about. Since there is no point at which you actually use closed loop control while injecting water/meth its not really going to matter unless you yourself want accurate charge temp readings.

Yes MAP based fueling algorithms do take IAT into account you the end use have the final say in fuel.

Its only tricky if you have temp based retard for timing, where you want to make sure you are getting your full timing