water/meth injection?

[NintendoKD]

urea?

[OM617]

W/M injection does little for IDI diesels except keep the combustion chambers clean. The methanol adds a little bit of HP but its a very poor $/HP gain. The water doesn't make a difference on EGTs like it does with DI engines.

Also, too much methanol will result in detonation so there is a limit on how much power it can add.

In other words, save the money for an intercooler instead (or a larger intercooler).

[truckinwagen]

W/M injection does little for IDI diesels except keep the combustion chambers clean. The methanol adds a little bit of HP but its a very poor $/HP gain. The water doesn't make a difference on EGTs like it does with DI engines.

Also, too much methanol will result in detonation so there is a limit on how much power it can add.

I will have to disagree with you on the EGT part.
when I had my system on my old turbo'd 1.6 I saw a marked decrease in EGT when spraying(200-400* drop in EGT at WOT and 25PSI)

as for power gains, the only I could see was because I could adjust the pump for more fuel because of lower EGT.
but there was a very noticeable change in power output after adjusting the pump to match.

as far as power per dollar, as often and as long as we really are at WOT under heavy boost, a gallon of washer fluid($2-$3) lasts at least a week of hard driving, and compared to the price of fuel, thats not much.

-Owen

[gldgti]

W/M injection does little for IDI diesels except keep the combustion chambers clean. The methanol adds a little bit of HP but its a very poor $/HP gain. The water doesn't make a difference on EGTs like it does with DI engines.

Also, too much methanol will result in detonation so there is a limit on how much power it can add.

I will have to disagree with you on the EGT part.
when I had my system on my old turbo'd 1.6 I saw a marked decrease in EGT when spraying(200-400* drop in EGT at WOT and 25PSI)

as for power gains, the only I could see was because I could adjust the pump for more fuel because of lower EGT.
but there was a very noticeable change in power output after adjusting the pump to match.

as far as power per dollar, as often and as long as we really are at WOT under heavy boost, a gallon of washer fluid($2-$3) lasts at least a week of hard driving, and compared to the price of fuel, thats not much.

-Owen

Owen, what did you use to control the fluid flow?

[truckinwagen]

my old system was very rudimentary, and consisted of an adjustable garden sprayer nozzle, a washer fluid pump, and a momentary switch.

it injected pre-turbo and worked surprisingly well.
there was no damage to the turbo fins from use, but then again it wasn't used for long.

my new system uses a high pressure nozzle and pump(150PSI) and a solenoid to activate the spray(so there is no lag from the pump turning on)

-Owen

[gnavs]

so would something like this work as your pressure switch?  Hooked up to a boost line and calibrated to close at x psi to turn on your pump...

[truckinwagen]

the new system I have will run the pump all the time(whenever armed anyway) and has a Hobbs switch to open the sprayer solenoid when the boost rises above the preset value.

-Owen