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Going mechanical with a Moose Omega Marine IP

It's an early 1970's Maytag, built like a tank, and other than replacing both belts on it a couple of years back, all original and runs like a top. Most likely moves more air than your turbo, too, Nate!:D
 
Ok back from the second dyno session. This one went much better. We had a good RPM signal off of the Ferret adapter after a little fidgeting around with it. You'll see in one of the graphs that we had a pretty erratic signal for the first two runs (we only printed 1 of the graphs, but you'll see why), but then the last two runs were really nice. Final number: 347 and 599. I'll take it!! For every run we've gotten a really consistent horsepower number. Run 4 had a better torque number than run 3 and that seemed to be because we let it idle for a long time between those runs which must have cooled the intercooler back off. I talked to the operator about inertia versus load cell and he said this dyno only runs in load cell mode. He said that with the tiny rollers this has he can't really hold cars back like a larger one. I also suggested loading the turbo with the foot brake and he said the dyno would act funny if I did that because there would be a spike from when it was not loaded due to me holding it back with the brakes and then an instant torque hit when I released the brakes. We talked about running in overdrive instead of drive to see what that did and we were going to try that, but first he wanted to try it in drive again. He wanted to lower the trigger RPM for the dyno so it would react to the RPM of the engine sooner. This would help load it sooner and build boost sooner.

So that's what we did....and it was a much better pull! I could feel the engine working harder and sooner and it was a longer pull up to the higher rpm. I feel like we have a pretty good setup working now. I think it would still be interesting to run on a dyno that's used to running diesels so I could compare and contrast, but this is going to work just fine for my testing purposes.

I'll attach some pics now. One will be of the exhaust vent tube. So it did end up working well, but interestingly it stretched way out after the first hit! I think the combination of heat and exhaust pressure made it expand. He said the tube itself was smoking pretty good during that first hit. He took a video so I could see during the second hit and this is the only outside video I have because I didn't bring my entourage this time. I also have EGT & Boost videos for all 4 runs which I haven't really looked at myself too much. I did take a quick shot of the fuel pressure gauge at the end of a run too for fun.

So I think I have a solid baseline now. On to more upgrades and future tests now!!

What the vent looked like after the first runIMG_7554.JPG

Run number 2, you can see the Ferret was acting up. Love that torque number!!IMG_7558.JPG

Run number 3IMG_7557.JPG

Run number 4IMG_7555.JPG

Videos in a sec.
 
Interesting the HP peak was basically same, and torque dipped 20.
You still have boost cut back from where you were hitting on the street shortly before first dyno, right?

Man, if you were in position to break some stuff without worries, I see big numbers on the table. You should hurry up and win a couple million $ just to have $50k play with the truck with-:)

Flippin sweet.
 
Will L. said:
Interesting the HP peak was basically same, and torque dipped 20.
You still have boost cut back from where you were hitting on the street shortly before first dyno, right?

Man, if you were in position to break some stuff without worries, I see big numbers on the table. You should hurry up and win a couple million $ just to have $50k play with the truck with-:)

Flippin sweet.
Click to expand...
Yeah that's kind of what I expected - the horsepower to be the same and the torque to be lower since the RPM would be higher than it read before. However the torque number was higher than I expected so that was a pleasant surprise.

Yes, the boost is still being limited by the boost controller, but I'm not even hitting the threshold of that on the dyno since I have that set at 28 amd I'm only reaching about 24 on the rollers. In fact because of that I'm thinking about cutting my boost on the street back to 24 since I'm obviously making good power at that level of boost. Plus that lower level should help longevity. Also after looking at the compresser map for an HX40 I'm wondering if I might actually be overheating the air at that higher pressure ratio.

Yeah I think there's a bit more in the tank for sure - it's sure tempting to try to go after that 400 rwhp number!! I'm hoping to have a different daily driver next year and then maybe I can work on turning it up further and not worrying about being able to get work the next day. I think it could happen, especially with a little meth in the mix. A larger turbine housing should help too since it would restict air flow less. Hmmm.
 
Pull 3 and 4 definitely sounded better, like it was actually working. And it sounds so smooth when you get on it. My truck sounds like a barrel of rocks rolling down the road comparatively. The exhaust shaking was cool too. :)
Some time if like to meet up and check the Tahoe out. :) I'm just in GR.
 
Nosferatu49534 said:
Pull 3 and 4 definitely sounded better, like it was actually working. And it sounds so smooth when you get on it. My truck sounds like a barrel of rocks rolling down the road comparatively. The exhaust shaking was cool too. :)
Some time if like to meet up and check the Tahoe out. :) I'm just in GR.
Click to expand...
That would be cool to meet up. There's a couple other guys in GR I'd like to meet too, so maybe we can do a mini GM IDI rally sometime! ....why can I never find the appropriate smiley??? I wish the emojis on my phone would post. :shifty::wtf::smuggrin:
 
I'm using tapatalk... The little up arrow on the side has them in it. Picked the one I want. Screen shot of what I get when I push it.

92d61eb761ec4c95a21019c8bcaa47f1.jpg
 
Nosferatu49534 said:
I'm using tapatalk... The little up arrow on the side has them in it. Picked the one I want. Screen shot of what I get when I push it.

92d61eb761ec4c95a21019c8bcaa47f1.jpg
Click to expand...
Oh gotcha. I found Tapatalk more cumbersome than posting directly, but I'm probably just too dense to figure it out. :wacky:
 
Took me a while to get used to it. It puts most of the forums I read in one place. I do go straight to the website for some things.
 
I just realized that I hadn't scanned my graphs into .pdfs and posted them yet! Here they are.
 

Attachments

  • 2.10.17 Run 2 graph.pdf
    354.7 KB · Views: 2
  • 2.10.17 Run 3 graph.pdf
    306.7 KB · Views: 0
  • 2.10.17 Run 4 graph.pdf
    307.4 KB · Views: 2
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