water/meth injection...anyone try it?

[mpascino]

I have about 600 miles on the rebuilt 6.2 now with a slightly modified banks set up. I can hit about 10-11 pounds of boost, only problem is the egts start getting hot after a bit of a haul. I am looking into water injection and wanted to hear everyones input. Will it be effective if I kicked it on at maybe 5 psi? What will happen if the activation boost level is too low? I haven't really let it go much higher than 1050 degrees, but I am sure it is capable. Right now, as the egt's start getting up there I notice more and more smoke. I probably need to turn the injection pump down a little bit more either way, but lower egt's would be nice. Is it worth spending 300 on a kit of should I do it myself? Any info is appricated,
Thanks,
Mike

[jcomp]

To quote Corky Bell's book, Maximum Boost...

"The water injector is not a very interesting device. It has little place in a properly conceived turbo system... To stake the margin of safety of a turbocharged engine on an inherently unreliable device is an idea whose time has long since passed. RIP."

Also,

"RULE: A water injector on a turbo car is a poor-excuse band-aid for not doing the job correctly the first time."

Apparently, Corky does not like water injection. smile.gif
Your results may vary.

[CleviteKid]

So it was a few decades ago, but the Allied air forces staked the future of the free world on water injection in airplane piston engines. At full take-off power, the flow rate of water into the intake of a Packard-built RollsRoyce designed engine was about 2/3 the flow rate of the gasoline !!

However, Sir Harry Ricardo, in whose books the above is quoted, did say it was much simpler to arrange for excess gasoline to be the coolant, then one did not need a separate water tank, or worry about the water freezing at altitude. In gasoline engines the extra cooling is to suppress detonation. They were not worried about EGT, particularly in supercharged - as opposed to turbocharged - gasoline spark ignition engines.

For diesel engines, the passive intercooler is the preferred way to control intake air temperatures, and indirectly control EGT.

Dr. Lee :cool: