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The issue is that basically all twin-pump conversions delete the fuel filter from the system. This is a good way to add one back.

What’s the logic here?

Pennzoil euro 5w-40 or Quaker state equivalent in my Roush truck. Redline 5w50 in my Whipple car. I like the mobil1 5w50 as well.

There have been a couple of cases of even stock-engine pistons letting go, not the least of which was Jeff Evans’ (tuning academy) demo car.

That sounds identical to what happened to this guy: Anyone seen a gen3 piston failure like this? | 2015+ S550 Mustang Forum (GT, EcoBoost, GT350, GT500, Bullitt, Mach 1) - Mustang6G.com

The 5.2 block is stronger, we believe, but I haven't heard of any gen3 blocks failing. The crank strength should be about the same, but the 5.2 damper bolt is bigger so a slight difference in the stroke plus the snout hole. The OEM 5.2 Predator rods are stronger, but they can be used in a...

The inertia phase happens after torque transfer, so everything leading up to that point should leave it in a state of: torque is being carried by the oncoming gear but sync speed lines up with offgoing gear. The inertia phase simply pulls the engine speed down to sync with the oncoming gear...

Good question. We noticed that S650 appears to be able to run about 3 deg more timing than S550 even though nothing appears to have fundamentally changed with the engine design that would allow this. Same compression, combustion chamber shape, even all the GDI timing and pressures are the...

Depends on the parameter. Some stuff can be stolen while others shouldn’t. Be careful modifying boost and base line pressures. I don’t think those do what you think they do. The shift constitutes numerous phases. Boost phase fills the passages with fluid. Stroke phase moves the clutches...

He pushed the boost/load up to 18 psi/2.04 today and hit 19 deg timing, no knock detected, true pump 93. I don't know what power he's making, but I'm very optimistic at these timing and boost levels. It's actually running timing up against a cylinder pressure limit we set.

Interesting observation. Though on the CJ data the low and high slopes are so close it only really needed one slope to begin with. I have FIC95 data and here's how it compares to CJ and DW: That said, I can't say for sure the FIC 95's are physically the same as the ones in the CJ which I...

Ran across this on yt and it reminded me of this thread. Does a Catalytic Converter Change Wideband Readings? (Dyno Tested)

If it makes you feel any better, many aftermarket tuners don't really understand it either. They either just apply alt2 to all drive modes or start jacking up things like boost pressure. Raising boost pressure is definitely not the way to do it, because boost pressure is intended to purge the...

Without extensive dyno time available, we were forced to estimate MBT curves. Basically, we compared MBT vs load at specific rpm and cam timing, comparing about half a dozen different engines ranging from Roush 5.0 to stock to GT500 to Whipple Gen4, raptor R, and others. We figured a few...

Absolutely the expectation when lowering the compression ratio was to be able to run more timing before knock. At 1.5 load on pump gas and stock 12/1 compression, you'd be limited to around 19 deg timing. I've been able to run as high as 20.5 deg with a larger GDI pump and a lot of other tune...

I've learned a lot more about these things since the original post. I don't know if the transmission tuning is more complicated than the engine, but it very well could be. I've theorized that the low torque mod in alt1 is set so low to reduce tire shock on something like a road course, but...

Just an update in case anyone is interested in the 10.4/1 pump gas effort, my buddy started over on the knock sensor and borderline tuning and is working his way up in boost and timing, fixing issues like cylinder trims along the way. As of now, he's at 1.5 load (10-11 psi) and hitting 24.5 deg...

It’s called BOA (brake over accelerator) and is a safety feature intended to allow the driver to disable unintended power just by pushing the brake. It’s a result of tfe big DBW unintended acceleration scare from the early 2000’s and yes, it’s pretty easy to defeat in the tune.

Be careful asking for this. If going faster than the other tuners is the goal, then that's easy. Shift it at 8000+, run it lean like .85 lambda, run the timing up against the knock sensors, disable COT, run Drag shifts with no modulation, you'll have the fastest one for what it is. It's also...

Just keep in mind that a huge knock advance number isn't necessarily the goal. You want to be as close to knock as possible, assuming you aren't hitting MBT. So the sooner you can reach the knock limit, the better for efficiency and performance. What Ford did was add 6 +/- deg to borderline...