zero lag setup

[loner]

From the FB page... http://news.epicinter.net/anti-lag-how-about-zero-lag-with-a-pulse-jet-spooling-the-turbo-up/

Someone please figure out how to do this and let us all know.

[94 Leone]

What I read was pulse jets in the headers/ uppipes and a compressor chamber of sorts for the inlet for ensuring the airflow remains up there(so pulse jet can keep pulsing). I just think having a pulse jet would make it sound awesome.

Though I though mounting turbos like that was bad? Or has all that changed because of the zero lag choochoo?

Edited October 8, 2014 by 94 Leone

[ADIKT]

 94 Leone said:

What I read was pulse jets in the headers/ uppipes and a compressor chamber of sorts for the inlet for ensuring the airflow remains up there(so pulse jet can keep pulsing). I just think having a pulse jet would make it sound awesome.

Though I though mounting turbos like that was bad? Or has all that changed because of the zero lag choochoo?

Probably to do with it being like the king of all IHI turbos? and that they would only use the turbo for one rally then fit a new unit...?

[Joker]

dat spool

them alternate fuel laws might snag it tho (bit like fitting NO2 or such)

[boon]

Yeah I've done a pretty decent amount of research into this.

The up-pipe is replaced with a unit referred to as the "rocket"

This is a conical section about the size of those weird 1L coke bottles.

As far as I understand it, the exhaust passes as usual up the center.

A system of valves (basically a glorified wastegate) feeds boost from pre-throttlebody into the outer shell of the "rocket"

This is where it gets a bit vague, and there may be different versions that do this part differently.

Either the spark is cyclicly skipped/retarded, or a standalone injector (direct injection style high temperature/pressure) is used to introduce fuel into the exhaust. I believe the later versions inject it at the same place the air feed comes in.

Either way, you have a very fuel-rich exhaust gas, combined with oxygen coming in from the compressor, which undergoes a relatively (compared to just exploding in the headers like a bang-bang setup) controlled burn in the shell of the "rocket"

This burn is focussed by the nozzle-like exit of the unit directly into the turbine housing.

Bonuses:

No bang-bang (love it or hate it) means no shock loading on the turbine, more consistent boost, boost at idle, good stuff like that.

Downsides:

EGTs are through the friggin' roof, Inconel required to make the "rocket" last more than about 5 minutes, turbo also suffers due to essentially having a crude rocket engine firing up it's arse. These are things that don't matter when you're a WRC team, but maybe aren't so good on a road car.

I'm still going to try and copy it on the Slippery Gypsy. Will be using a wastegate to feed boost into the exhaust and a cheap DI injector (probably off a ****ty old Mitsy) to feed the fuel in, see what happens and what breaks.

Apparently the guts of it look like this: