Honda Power Unit Hardware & Software

[Abarth]

To me, it sounds rather that the engine goes into it's limiter, as if there is no connection between wheels and engine for a short moment, while full thottle stays applied.
Strange enough...

[davidfroshanzen]

This condition is like unstable stationary engine RPM. At commercial car The indications for air leaks or one of the servo valves do not close because of dirt or crust oil vapor is sucked from the combustion chamber (combusion chamber). This often occurs in my car (civic manufacture 1983)

[hurril]

You mean speculate?

No I meant what I said. I would like actual technical conversation in this thread from people that know things. There are plenty about but you are probably not one of them.

Last we speculated were on 3 areas (as reason for vibration)

1) too much of the engine structure shaved off for weight saving

2) TJI causing vibrations

3) Valves getting too hot

How would valves getting too hot affect the engine this way?

[FW17]

No I meant what I said. I would like actual technical conversation in this thread from people that know things. There are plenty about but you are probably not one of them.

Last we speculated were on 3 areas (as reason for vibration)

1) too much of the engine structure shaved off for weight saving

2) TJI causing vibrations

3) Valves getting too hot

How would valves getting too hot affect the engine this way?

don't know, something put forward by Mark Hughes. May be the hot valves were affecting the seating clearance and causing vibration

[BanMeToo]

To me, it sounds rather that the engine goes into it's limiter, as if there is no connection between wheels and engine for a short moment, while full thottle stays applied.
Strange enough...

To my ear the revs are not increasing enough to hit the limiter, which is quite a bit higher than the shift point of the current cars.

[GoranF1]

There are definite signs of improvment....if it is true than Mario Ilien is working in Milton Keynes next upgrade engine might be very good.

[FW17]

There are definite signs of improvment....if it is true than Mario Ilien is working in Milton Keynes next upgrade engine might be very good.

Where did you here that?

If true that is great news. High time Honda started a parallel process with there engine R&D, just like they did with their chassis programme in the 2000's (not very successful though)

[makecry]

There are definite signs of improvment....if it is true than Mario Ilien is working in Milton Keynes next upgrade engine might be very good.

Wouldn't he be on a gardening leave?

[GoranF1]

There are definite signs of improvment....if it is true than Mario Ilien is working in Milton Keynes next upgrade engine might be very good.

Where did you here that?

If true that is great news. High time Honda started a parallel process with there engine R&D, just like they did with their chassis programme in the 2000's (not very successful though)

Its a rumor...not confirmed

[FW17]

There are definite signs of improvment....if it is true than Mario Ilien is working in Milton Keynes next upgrade engine might be very good.

Where did you here that?

If true that is great news. High time Honda started a parallel process with there engine R&D, just like they did with their chassis programme in the 2000's (not very successful though)

Its a rumor...not confirmed

Hope it not a rumor like the call to Mercedes

[godlameroso]

It's resonance, could be the engine or interaction of the MGU-K drivetrain and crank. Could just be compressor surge, not sure if intakes are throttled, blow off valve tuning?

[ncassi22]

Honda has a massive challenge ahead. However they seem to be similar to 2016 Merc/Ferrari level i.t.o power (Sauber as reference).
https://twitter.com/gzoneStudios/status ... 6606501888

[haza]

Honda has a massive challenge ahead. However they seem to be similar to 2016 Merc/Ferrari level i.t.o power (Sauber as reference).

https://twitter.com/gzoneStudios/status ... 6606501888

only 9kph down on a heavily detuned engine

[godlameroso]

If air flow is metered as MAF(mass air flow sensor as opposed to manifold absolute pressure or MAP) maybe they need a resonance tube on the intake. On the old Buick turbo V6's from the 80's that would use MAF sensors, you would get nasty compressor surge at part throttle when you put a nice hair dryer(big turbo) in there. What people started doing was putting a resonator tube from a late 80's Nissan 300zx turbo between the MAF and the compressor inlet. It's just a plastic hollow tube with two stubby hemholtz tubes on either side. This would keep the pressure waves from bouncing off each other at part or off throttle(when the throttle plate was restricting the intake and bouncing pressure waves back to the MAF, and compressor). Granted these engines shouldn't have this problem because they have electronic blow off valves and variable intake trumpets.

[nokivasara]

Are they allowed to use variable geometry turbos?
Sounds a bit like compressor surge but turned up to 11. It's strange that it lasts for so long during every gear change.