Water & Methanol Injection

[Mephisto]

So the deed has been done, stock runs showed 77hp@3900rpm with 132 ft*lbs@2450rpm. Seems lower than I expected and I think I can blame some of it on the fact that my friend that was operating it seemed to think that 20% load was sufficient for a run, to me the engine couldn't build proper power with only that much resistance. I couldn't argue as I was getting dyno time for free. Remember this would not increase the numbers much, maybe by a max of 10%. I turned up the boost to 16psi, as I suspected it didn't change much power wise, although my EGTs were lower, remember without more fuel more power will not happen if all your fuel is already being burnt. Runing 16psi and 50/50 meth/water got me 83hp@3550rpm and 145ft8lbs@2400rpm a decent increase. That would be a 7.5%hp increase and a 9.4% increase in torque, I do think those gains are not only from the meth, I think the increased boost and the meth in conjunction is what made a real difference as well as an increased amount of water on the intercooler as the cooler was scorching hot from that little turbo making just 16psi. I didn't have enough time to do all the runs I wanted since adjusting the fuel with the intercooler still in place would have taken a little too long. For all those who dont dyno things, numbers are very arbitrary unless from the same dyno under the same conditions, so I layed down a baseline and will run under the same settings next time, although I would like to do a run under a higher load setting as well to see if I am right about my assumptions.
Note that the second run yielded not only more power but that power came on earlier. At 16psi my intercooler was scorching hot I had to douse it with water between runs. I'll write more tomorrow as I am super freakin tired.

[Mephisto]

I was expecting most of the gains to be seen with the fuel turned up, to me most performance gains seen on a diesel are from steps taken to lower EGTs and then adding fuel to bring EGTs back to where they were. That's usually why performace upgrades on a diesel will yield increased fuel economy (unless one has a heavy foot and is always dumping in fuel, lol). I keep vasilating between wanting to change the entire turbo and simply upgrading it, especially after dynoing the truck it seems the turbo is just too small. I'll leave that decision untill I have completed everything else.

[Luna-Sea]

Thank you very much for doing that eh!
I am sure it is satisfying many curious members
and I am definetely one of them.

Right On!

[fishslapper]

Thanks That is awesome !! I have been curious about all of this too .

Now when the heck are we all going to get into propane injection !! I have heard very good things about it with regards to power and torque increases and burning cleaner.

Looks like we will all be meth heads soon....

[fexlboi]

Very interesting results. Most interesting is that a 2.8 intercooled Pajero gets 77hp max. (even if the 20% load was insufficient it would be not more than 85hp). Sounds kind of low. I always thought the 2.8 Pajeros have easy over 100hp.

I tried the meth injection on a l300 and had no luck to feel any noticeable difference. Also at the situation where you need more power (highway and steep hills) the meth tank was empty pretty fast due the constantly high boost. If you have to buy meth and mix it in the right ratio with water it can get quite expensive (relative to the few more hp)
From my experience bringing the EGT down (in my case with a snorkel by about 200°) and up the boost made the most noticeable difference.

p.s. Of course you bring the performance down to stock again with bigger wheels

[Mephisto]

I was expecting a 20% difference in power, maybe 25%, not 38.4% (crank to wheels according to the rated 125 at the crank), that would put the power at the wheels at about 100hp. As the paj has a large diff (hypoid gearsets are notorious powersuckers) I could see the parasitic drivetrain loss to be about 20%. I will make sure I insist on loading the dyno more next time as a comparison to the 20% load, that will show how far out it would be. To give you an idea of the lack of load, instead of adjusting the boost I simply removed and plugged the boost line going to the waste gate actuator (not recomended, lol, I was simply going to get out of it if I saw too much boost), I made 16psi on the dyno with that load setting. When I drove away, thinking because it didn't go too much over 16psi on the dyno it would be fine on the street, thus I left the actuator disconnected, boost hit 24psi before I even gave it hard telling me I wasn't loading all that much on the dyno, therefore making my dyno run rather useless even though it still showed an increase in power. As I said, dyno numbers are arbitrary unless compared with runs on the same dyno under similar conditions. I'd have to agree with fexlboi, if I had to buy this kit for my vehicle I probably wouldn't, It seems to work much much better on direct injection diesels and on gassers than our IDI diesel. Remember the increase I saw was in combination thus not solely responsible for the gains. I'll see how it affects the truck when everything else is done as I think engine mods are always amplified when working in conjunction with mutually beneficial mods.

[Mephisto]

Remember this is only my third diesel that I have owned and modified, all my knowledge is with FWD gassers and limited RWD gassers not diesel 4X4s with heavy drivetrains.

[.:FoRuM56:.]

Just had my Pajero on a dyno.

Fifth gear pull on 35" tires it layed down 87whp and 150lbft...
I didn't change anything from running on the street so I couldn't get a peak including the methanol.