Negative Pressure Supercharging..Thoughts/comments?

[Norbie]

Could he be the real world equivalent of a forum troll?

[tinkerbell]

picsorban!!!

[tinkerbell]

found one:

[hamish]

Carefull not to throw the tooling out.
ive jusr disciovered hoe difficutlt it si toi type whern you aree relly pissed . note thrid ius homnestuyly how ewell i can type after 12 16 beers and othe r thi stuif f hojne4tsrtt

[timtx5]

Carefull not to throw the tooling out.
ive jusr disciovered hoe difficutlt it si toi type whern you aree relly pissed . note thrid ius homnestuyly how ewell i can type after 12 16 beers and othe r thi stuif f hojne4tsrtt

Sounds like someones going to have a hangover.

[ox!gen]

you'll feel just like i did yesterday!

[hamish]

Sounds like someones going to have a hangover.

Very...... very hungover

[jmac]

This bullshit (I haven't looked at the specific site) is a crackup. oh hangon it is the same person.

The main idea in it is nothing more than a tuned length exhaust header. Been around since adam...And it has to be configured to suit the size engine and rpm range you want. And even then the gain is small.

btw running coolant temps that low is a great way to cut your engine life in half (or worse).

they try to talk about this crap every so often on a mopar related website, and I've cut it to shreds more time than I care to repeat. then they tried a reply to 'put to rest the pseudo science the so called experts on this forum have lied about!'

Zac - don't introduce him to the metric system, introduce him to Lithium carbonate.

Somenbody on moparmarket indicated a particular chrysler club was 'testing' one of the systems a few years ago. I never heard any more about it, no doubt because they were all too embarassed to admit how much they'd been taken for.

I think the idea was ripped off of an old vizard article about exhaust scavenging via header tailoring. He mentiones the greater amount of 'pull' (and I'm using that term because it fits this crap) than just the piston moving down in the cylinder. Which maybe true, but Vizard often writes articles to get people interested in tech potential, and assumes that readers aren't complete muppets (usually safe). What the neg supercharging crowd seem to forget is that this greater force is only able to act on things when both the intake and exhaust valves are open - and as such - during overlap the valves are open stuff all, and it's able to flow maybe a token 5-10% of what the intake or exhaust can flow at full lift.

there was also a mopar vendor at one stage who was advertising this crap. Certainly convinced me he was the tech guru I always thought he was.

John McKenzie

[VHDREAMS]

2 equal size gas cylinders filled with the same volume of gas are placed in an open field. The temperature of one gas cylinder is chilled to a cold 10°C (50°F) while the other gas cylinder is heated to a hot 121°C (250°F) or to just before it explodes. A spark is used to ignite the hot and cold gas cylinders and both explode with a tremendous force but the hot gas cylinder leaves a larger crater. The reason for this is, the less dense hot gas reaches its maximum pressure much faster than the more dense cold gas which causes the hot gas to explode with a much greater force.

I get what he is saying here, but his reasoning is way off, the pressure in the tank heated to 121 is going to be alot greater than the other.

So yes I guess it could work, but there is less oxygen in hot air (its less dense) so you would have to get cold air into the cylinder then add your heat for big pressures.

Also I cant see why negative supercharging wouldnt work, but creating a restriction in the exhaust isnt the way to go about it.

Cory

[rowdytoot]

GOLD.. comedy GOLD...

I love this :

Development commenced in October 1988 and after only 9 years we got this new supercharging technology to work on 10 December 1997.

9 years to "develop" something that was developed, I'd imagine, not that long after people started building 4 stroke multicylinder engines... so what about 1900 or so!...

[Che Castro]

he had to fight off all the sabateurs remember.

[Art Vandalay]

He seems to forget that light bulbs come in a variety of wattages.

[Norbie]

No, all light bulbs are exactly one watt. Even the 50-watt ones.

[Wobbler]

That just means there are 50 light bulbs in one. duh.

[Zac]

Won't an engineer or aerodynamicist agree that it is easier to blow air than to suck it into position?