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So you're saying that the manifold pressure can't be used to calculate BMEP because of cam timing?

No need to get worked up, but it's important to at least know this stuff, IMO. I have no problem sitting here doing calculations on MBEP and LSPI, and then ripping off some nice pulls in the car on the way home. :D

The main thing I'd be worried about with the diesel oil is that the problem additives are allegedly detergents, and diesel oils amy tend to be high detergent to deal with the soot problems. Just a thought, I'm no expert on motor erl.

The problem is that just climbing a small hill at highway speeds is "straining" the motor. 20% throttle can produce more than enough boost to operate in the LSPI region. Rear gear ratio might be another way to avoid it. Time for those 3.73s. :D

In MA a muffler delete is completely illegal. I'd never get out of my driveway with it. I got several tickets for the bone stock exhaust on my EVO8. Had to show the court that the exhaust was indeed stock each time.

The HF pump didn't last long for me (they may have more than one though, I don't remember). Most readily available drum pumps can't handle alcohols or solvents for very long. Wurth offers a nice composite one that I've been using for years on ethanol and methanol. I'm sure someone else must sell...

All good choices. :D

I do that all the time, in my 6.7 liter. :D

You don't have to floor it at all to get into the LSPI operating zone, it's simple math. I agree though otherwise, I'm enjoying the shit out of my car.

Watch your boost at highway speeds when you climb hills. You can get it to 10-15 psi at very low throttle angle. Flooring it, punching it, etc has nothing to do with LSPI. Doing so causes a downshift (on autos) and that's good, since it raises RPM out of the danger zone. On a manual that's up to...

Some of the European GDI motors do have some elaborate and expensive regular maintenance procedures, including the aforementioned walnut blasting. A mechanic friend of mine at Lexus said they ran DI with port injection on some models to try to mitigate the problems. Personally I can't wait to...

I don't know enough to say for sure, but that long ago, they may have been able to tune around it. Regulations get stricter every year. Some time last year I was reading that all or most of the OEMs are in on a group project to get to the bottom of this. Makes sense since it's in all of...

I'd like to try to figure out why LSPI is so pronounced at low rpm, but many times that BMEP is perfectly fine at higher speeds. I'm sure it has something to do with flame speed vs piston speed, or something similar, and could probably be calculated. You'd think the normal reduction in ignition...

I have no idea what it's going to look like at 100k miles. It all depends on what the real mechanism behind LSPI actually is. The first problem I have with that last quote though is that the engine needs all of the fuel the injectors can supply. Nothing could be further from the truth...

The hit they take on warranty work for less than 1% of engines is far less than the hit they take if they can't meet federal mandates. It's rolled into the cost of doing business. The majority of cars will eventually be GTDI, so I'm sure they will figure it out going forward, and improve on...

"Punching it" isn't the problem, and shows a continued misunderstanding of what LSPI is. If you punch it, the trans will downshift, which is good. It's when you're running part throttle and the turbo builds a bunch of boost and it doesn't downshift that you can get into the high load/low rpm...

Anyone saying that LSPI is just another term for old fashioned preignition doesn't understand what LSPI is. Engines of days gone by were not capable of generating the conditions required to produce LSPI. This is specific to GDI engines with tiny turbos, regardless of manufacturer. It might...

I've been running nitrous on top of maxed out turbos for over 10 years. There will be no difference in air temperature, you're not working the turbo any harder. In fact you can back it down 10-20k rpm and not lose any appreciable performance. There is some cooling effect from the nitrous, but if...

I think when it comes to all of the knock parameters, the best place to start is probably to trust the ECU programming. OAR is the long term running trim based on all of the knock feedback mechanisms and programming, so that's the only one I watch on a regular basis. You'll want to look at...

Many of these alleged sensors are inferred. If you can't find a physical sensor, it's probably inferred. :) There's no best or most important parameters to monitor. You're looking at 6 out of 100 things, and those 6 things will depend on what you're trying to do. At the track, I might have 6...