Water/Meth injection.. Is this a good idea or bad idea?
01-03-2013, 12:10 AM
#3
Rennlist Member
I've never seen anything like that before. It looks quite unique; like it's made custom for that turbo.
Or, maybe it's a joke somebody posted.
I think it would kill the compressor wheel; droplets would be like tiny bits of sand, at those high speeds, eating away at the wheel.
Anyway, I do the water injection thing. The school of thought is that it can take the knock limit (caused by inadequate pump octane), out of the equation. The added benefit is the extra intercooling.
However, it should never be used as a bandaid solution for an ill-conceived system
Example: "my turbo is too small for the power I want, but I'll just turn up the boost and cool the charge down with my new WI".
Or, maybe it's a joke somebody posted.
I think it would kill the compressor wheel; droplets would be like tiny bits of sand, at those high speeds, eating away at the wheel.
Anyway, I do the water injection thing. The school of thought is that it can take the knock limit (caused by inadequate pump octane), out of the equation. The added benefit is the extra intercooling.
However, it should never be used as a bandaid solution for an ill-conceived system
Example: "my turbo is too small for the power I want, but I'll just turn up the boost and cool the charge down with my new WI".
01-03-2013, 02:02 AM
#4
Professional Hoon
Rennlist Member
Rennlist Member
Thread Starter
Join Date: Jan 2010
Location: Melbourne, Australia
Posts: 7,090
Likes: 0
Received 4 Likes
on
4 Posts
I see a flaw. Water injection pre turbo.. if the water isn't a find mist enough it will damage the compressor blade. Im sure these guys have it set out properly, apparently they use it indy cars.. but i always see it's something else to fail.
Looks cool though
Looks cool though
01-03-2013, 02:10 AM
#7
Rennlist Member
Here you go Paully:
http://www.3sgto.org/f13/pre-turbo-m...tion-6751.html
Since it's running on meth, it's basically fuel injection pre-turbo.
http://www.3sgto.org/f13/pre-turbo-m...tion-6751.html
It is a 2.65 liter V-8 burning methanol and producing in excess of 750 horsepower at 12,000 RPM and 45" of boost.they were run to 13,200 RPM in their day,
The XB uses sixteen primary Bosch Motorsport injectors, two per cylinder http://www.lolachampcar.com/images/X...B%20Intake.jpg , and four side feed Bosch injectors arranged in a ring, called the PCI, at the turbo compressor inlet. Fuel rail pressure is 8 Bar or approximately 120 psi! Atomization at this pressure is a sight to behold.The compressor inlet injectors serve to cool the incoming mixture as it is compressed. Fuel is supplied by a mechanical fuel pump located in the fuel cell
The XB uses sixteen primary Bosch Motorsport injectors, two per cylinder http://www.lolachampcar.com/images/X...B%20Intake.jpg , and four side feed Bosch injectors arranged in a ring, called the PCI, at the turbo compressor inlet. Fuel rail pressure is 8 Bar or approximately 120 psi! Atomization at this pressure is a sight to behold.The compressor inlet injectors serve to cool the incoming mixture as it is compressed. Fuel is supplied by a mechanical fuel pump located in the fuel cell
The system works remarkably well. When I first started looking at engine data, I really thought the inlet air temperature sensor was broken. It just sat on 68 DegF which just could not be so given that there was a turbocharger and ambient temperatures were up around 90 DegF. I then expanded the data session to look at all the data from the session including firing up in the hot pits. As you can see below, inlet air temperatures start off at about 130 DegF then rapidly fall when the PCI ring fires. With heat soak, I've seen these temperatures up in the 190s and yet they fall like a rock when you stand on the gas. Neat trick Cosworth!
