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DYNO RESULTS: From NA to TD 131.9 HP
by
AudiVWguy
on 15 Mar, 2009 12:53
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I had an opportunity to get on the dyno at my friends shop. Here's the printout.
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#1
by
jtanguay
on 15 Mar, 2009 13:58
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thats some pretty good power
usually on a diesel the torque is higher though... that almost looks like a gasser dyno :lol: but i bet thats how Giles set the pump up.
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#2
by
rallydiesel
on 15 Mar, 2009 14:29
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Well it is a 1.6. Those act more like a gasser than the 1.9.
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#3
by
AudiVWguy
on 15 Mar, 2009 19:07
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Yeah,
I was wondering about the torque number. There's not much happening until you get above 3000 and 10 psi. The motor has never been very torquey down low. I let off a little too soon, wasn't sure what redline I could get away with.
I'm not sure what is involved with the set up to get an accuract reading. I'll get back with him to find out.
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#4
by
RabbitJockey
on 22 Mar, 2009 19:50
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looks good i wonder if you could have gotten a better number if you would have wound it out to 5800 or so
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#5
by
jtanguay
on 23 Mar, 2009 12:22
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its probably best not to make much torque down low anyways... thats when you'll cook the motor or bend rods :wink:
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#6
by
dubmekanik
on 24 Mar, 2009 11:54
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Hi guys. I am the one that performed the dyno test for Jeff's vehicle. These numbers are 100 percent accurate in every way. No matter how the dyno is calibrated (user calibrations) the hp will always be correct. The TQ. is a function of hp and rpm. On a diesel we always use the dyno rollers as an rpm ref and compared these to his dash tach. As long as the run matches these rpm readings after the run, we can be assured TQ will be correct as well. The numbers may have gone slightly higher if we did more runs, allowing the trans fluid/oil to thin out a little, but other than that...This is the purpose of dyno testing in the first place, to see how your setup is performing, and where changes need to be made. If I remember, Jeff is using a myriad of parts from different people and cars (inj pump and turbo/manifold, injectors) and to expect this setup to perform optimally with no tuning is a stretch. This is my guess as to why the numbers are lower than normal/expected if they are in fact so.
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#7
by
subsonic
on 24 Mar, 2009 17:55
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This is my guess as to why the numbers are lower than normal/expected if they are in fact so.
Nope, those are great numbers for an engine that was originally a naturaly aspirated unit. It is all about the setup and what you want out of it. Big TQ means bigger boost and fuel down low which puts the stock rods into the danger zone. I'm sure that the engine could be adjusted either way for an increase, more tq or more hp, or pehaps a bit more of both. If it will hold together, you could run up the rpms and the fuel to 6k. Looked like it was still climbing and had not started to flat line yet. Either way, those are upper end stock tdi numbers you are putting out with an old 1.6 mechanical diesel. Walk tall man
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#8
by
dubmekanik
on 24 Mar, 2009 18:35
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Anybody have an idea what's going on between 2500 and 3k? It may have been the turbo building boost when the dyno was being held steady at wot before the ramp up of the run (only a sec. or two). Jeff insisted that he operate the throttle so there are a few things that are different like the flat vert line at the end (no biggie) and maybe that small hump at the beginning. Does anyone have any dyno graphs with something comparable?
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#9
by
Op-Ivy
on 24 Mar, 2009 19:43
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I would suspect that it would have something to do with the dynamic or static timing.
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#10
by
dubmekanik
on 24 Mar, 2009 21:36
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Maybe Jeff can chime in and let us know what it's set at?
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#11
by
AudiVWguy
on 24 Mar, 2009 22:25
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I had a conversation with Giles and the timing was a little low. I also found that this pump draws in fuel so well now that it exposed some air coming in the fuel line (clear hose). Which I'm sure was happening at the dyno run. I have now set the timing to .95.
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#12
by
subsonic
on 25 Mar, 2009 06:26
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Lift pump? If you do, it will effect the timing a bit I think. Call Giles and ask him about it.
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#13
by
AudiVWguy
on 25 Mar, 2009 20:56
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I was running a lift pump on the previous set up.When I install an internal pressure gauge, I saw about a 4 psi increase across the board. Giles set up needs nothing. The air in the lines was causing all kinds of havoc. New lines should be standard with a new pump.
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#14
by
dubmekanik
on 25 Mar, 2009 22:25
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Not sure if this applies, but I am used to seeing air bubbles on perfectly running VW diesels through the clear feed line. I think I remember someone saying it had to do with the filter? I thought it was strange, but they assured me it didn't make much difference, as the pressure is after the pump.