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I was just curious. I've got some other aftermarket HW going in that is dependent on knowing the RPM limit where multispark stops happening. I was just hoping that I could determine a definitive RPM...

At low RPMs the EEC will generate multiple sparks per ignition cycle, right? This is a common strategy to promote complete combustion. I cannot seem to find any tuning parameters for that. I'd...

I have a good tune with aggressive timing but verified no knock on 92 octane pump gas. I want to modify the tune for 100 octane unleaded racing fuel. I will add 5 degrees of advance for some high...

Like most tunes I have zeroed out the octane plug table and developed an aggressive pump gas tune. But occasionally I race (drags) and I need to develop a race gas tune. No problem. I can do that. ...

So is it correct that the averaging of the external sensor voltage reported will be over whatever the sample rate of my vehicle is? So my sample rate in the collected log is about 100ms. Then the...

So let me know if I've got this right: multiple EIO-3 v data points are collected over 10ms. Their average is sent to the VCM scanner. That 10ms value is reported in my 100ms data log event. The...

I'm using three of the A/D inputs on the MPVI Pro. I'm having good luck with the 0-5V signals from my WB and from my boost sensor. I'm having some strange results from the piggyback timing...

I write my own excel VBA and have do a time shift routine to match the WB results with the correct engine combustion event. You have to take into account load and RPM... it was some guesswork at...

Someone recently described that some Ford strategies, maybe Mustang, maybe Lightning, did something strange below 1750 or 1250 RPM. Instead of the expected 4 ignitions per revolution they switched...

Thanks Chris, LOL. Yea, old school on the plugs 10-4.

So here's a very serious tuning question. Without a knock sensor, how do you find with the max timing advance for your new situation? I really don't want to blow it up with to much timing. I can...

For a GT500 stock long block and heads with a Whipple 2.9L blower I?ve got a good tune with WOT lambda = 0.78 and timing advance = 16 degrees with cold IAT2, pulled down to 10 degrees advance with...

I wanted to get this on the record in the forum just so someone searching can benefit from my experience. (Experience is what you get when you don?t get what you want.)

I recently had a chance to...

I'm a ford tuner kind of guy, but I've got a client that wants a pulley + tune for his Hellcat. I'd like to help him, and can accommodate minor tweaks, but I don't want to experiment on his dime or...

No methanol. No cats but otherwise stock exhaust. Decel timing advance in the < 0.5 seconds while I'm shifting stays at 15. Yes, there is a bypass built into the blower. I have no reason to...

The advance is 15 degrees at stable WOT. When I lift for the shift during that half second where the pop occurred the timing only increased to 17.25 and came right back down when the accelerator...

Wondering if there is some way I can slightly slow down how fast the throttle can snap shut...

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I did just upload my tune to the repository. Not sure how that works or when you can see it. FWIW here is how I describe the tune changes: TB tables from Cobra Jet tune, disable rear O2, disable...

I'm tuning a 2008 GT500 with upgraded supercharger. About one out of 25 times on a WOT granny shift at the abrupt transition from WOT to closed throttle there is a VERY LOUD pop. I'm certain it is...

So if I'm putting this back into a 2008 GT500 which does not have the ETC Idle Throttle Angle Table. Is there anyplace in this tune to put this? LOL. Thanks for the help!

Deleted the custom PID again; rebuilt it from scratch again; works OK now. Cannot explain it. Not going to try to explain it.

I'm adding a GM MAP sensor to log boost and having an issue where the voltage I measure at the EIO connector doesn't match what the MPVI is seeing. When I measure voltage at the EIO connector pin...

I updated from an early 3.0 to latest 3.0 a couple of days ago and for my 2008 GT500 several scanner selections have disappeared. SAE load has disappeared and SAE fuel status have disappeared. I...

I've just added a bigger SC, injectors, and the monoblade TB to my 2008 GT500. The tune that came with the package runs pretty well at WOT, but at light cruse and idle surges badly. Worse,...

Using the latest 3.0 release, for my 2008 GT500 (cm 0x7e0 spanish oak 1024k FBMM0c9.hex) can I get injector pule-width and IAT2 (Manifold Charge Temp)? I also need a way to measure boost. Is there a...