Hyundai IONIQ land speed record
 

On November 2, 2016, a modified production IONIQ set an FIA speed record, at 157.825 mph at Bonneville.
* nose was tweaked
* airdam was extended
* wiper delete
* some gaps taped
* air curtains sealed off
* mirror-delete
* lowered
* belly mods
* MOONs
* Goodyear EAGLE racing tires
It's fascinating that, again, when the reputation of the corporation is at stake, the convex, full disc, wheel covers are preferred, and the drag-reducing air curtains are abandoned.
It's an easy GOGGLE. Some nice high-res photos.
caradvice.com.au/495052/hyundai-ioniq-set-land-speed-record-at-bonneville

Also easy to click Insert Link and paste the link there.

Running on Goodyears wasn't a bad idea just a day ago.

They had more luck than Tyler Hoover:

https://www.youtube.com/watch?v=hac-PvKqKQc

Atkinson cycle RIP
 

My guess is, that Toyota engineered all the engine components for a limited BMEP, and adding extra atmosphere sent it over that threshold.
In the Prius, the electric motor assist is equivalent to the nitrous injection. Pistons, con-rods, and crank journals never feel a thing.

Your guess is (as I am afraid is very often the case here) quite wrong. I supercharged - and then turbocharged - a Prius over 15 years ago and the engine coped without any worry at all.

without worry
 

Did you operate at W.O.T., continuously, for 12-miles ? What was the difference in B.M.E.P.?

I would love to see some pictures of this car.

Your search term is https://duckduckgo.com/?q=autospeed+turbo+prius&ia=web

There may be a summary page, there're 55 pages of feature cars maybe it's in there.

This is typical Aerohead. Completely wrong, so changes the proposition of the argument.

You said:

You are wrong. But rather than recognise that, now it becomes:

No I didn't, and that is not what was required to prove that your point was quite wrong.

The car didn't go on a dyno, but BMEP would have been up considerably - I ran highest boost at peak torque.

All in all, a good example of Aerohead's posts - about half are are wrong, misleading or irrelevant.

Supercharged:

https://i.postimg.cc/pVD5yynJ/belt-drive.jpg


Turbo'd:

https://i.postimg.cc/8crFbPyN/turbo-engine.jpg

Some more pics.

Supercharger:

https://i.postimg.cc/9MhPbk7K/supercharger.jpg

Fabricated supercharger bracket (incorporated into new engine mount):

https://i.postimg.cc/0yNJksY9/final.jpg

Supercharger mounted (the blue is lagging I used to try to reduce noise being radiated from the plumbing. I just couldn't get it quiet, so went to the turbo instead):

https://i.postimg.cc/tgN02LcV/blower-overview-final.jpg


Fabricated turbo exhaust manifold:

https://i.postimg.cc/vmLxYZ42/man-final.jpg

Turbo:

https://i.postimg.cc/gjw0Zz0W/turbo-final.jpg

Turbo mounted:

https://i.postimg.cc/G2PpP7FM/no-heat-shields.jpg

New turbo fuel system:

https://i.postimg.cc/Pf63ftZq/new-fu...m-external.jpg

New airflow meter:

https://i.postimg.cc/tgQyrdC8/AFM-insides.jpg

All about 15 years ago now!

How did the Hybrid Synergy Drive react to the increased torque? (Asking for a friend)

The outcome was complex, but in short, the increased engine power largely went into charging the HV battery, so full electric power was available all the time.

The car was an NHW10 Japanese domestic model and had a 'turtle' mode that meant the HV battery had got too low in charge and so no electric power was available. Turtle mode up hills was terrible, and I lived at the top of a very steep mountain. My memory is something like 80 km/h (50 mph) up the hill in turtle mode at full throttle, but after turbocharging, I could climb the same hill at something like 110 km/h (~70 mph).

Open road mileage also improved with the turbo.

It was all very complex to get right (eg in altering the air/fuel ratios to get rich mixtures at full boost) but the car ended up feeling just like a factory turbo Prius.

I also modified the regen braking to make it much stronger, altered the electric power steering weight to give better feel, and ran a rear sway bar and a front undertray.

That's a nice part.

Thanks. Welded together from steam pipe bends:

https://i.postimg.cc/Jz5WRpV8/man-8.jpg

not what was required
 

If you've ever been to the Bonneville International Raceway, it becomes immediately apparent that in order to achieve terminal velocity, a vehicle may be required to accelerate under wide-open-throttle until it reaches the timing lights at the end of the course ( 12-miles in a good year ); something the IONIQ may have had to contend with.
Engine durability is paramount, especially when you consider that to obtain an official FIA record, the car is required to accomplish a return pass!
This is highly germane to the topic.
If you're implying that your supercharged Atkinson cycle engine is capable of 24-miles at sustained W. O. T., I'd love to see that.

I was mainly impressed with the thickness of the mounting plate. I assume in the before pic, that that's just a gasket.

Was it as shiny on the inside? Or was the weld penetration short of the inner surface? Extrude honed?

Aerohead said:

(Note: nothing to do with land speed records; comment was in relation to a Prius fitted with nitrous that died).

And of course, as is so often the case, Aerohead was quite wrong. I supercharged and then turbocharged a Prius, the engine coped with no drama whatsoever.

But rather admit that his guess was wrong, now Aerohead pretends the discussion was about something else:

Huh?

For those interested in argument structure, it's called a strawman logical fallacy.

A strawman fallacy occurs when someone takes another person's argument or point, distorts it or exaggerates it in some kind of extreme way, and then attacks the extreme distortion, as if that is really the claim the first person is making.

Yes just the gasket in the 'before' pic. The manifold flange was cut out on a chalked plate by oxy, and then I filed and ground it to shape. Took me a while!

The insides of the manifold were pretty good. I didn't have a welder then and so I had a professional weld it together - interestingly, he did it with a stick welder. We did the welding in a number of steps, using a die grinder inside as required where there was excess penetration.

strawman logical fallacy
 

There goes that zero-perspicacity phenomena again!
Is it possible for you to discern the difference between running an engine, never intended to be supercharged, at W.O.T., for 12-miles at a time? At least twice?
The fact that another Prius engine blew up has no meaning in your world?
Your 'momentary' acceleration equals the IONIQ team accomplishment?

The strawman logical fallacy continues.

continues
 

Shame that English isn't your first language. You appear to be baffled by it. And don't get me started on logic.