Took the Rabbit to the Dyno today :) - page 1 - IDI Engine - VWDiesel.net The IDI, TDI, and mTDI source.

• Took the Rabbit to the Dyno today :) by Staley on 07 Jun, 2006 20:53
• 3d gear pulls
  
  
  
  
  
  Here are the conversion gear ratios that I used for the dyno..
  I have a FF trans. My final drive ratio is 3.89 and my 3d gear is 1.29
  With my tire dimater at 21.5" I used a RPM calculator to get
  2622RPM in 3d gear at 35mph.
  so the ratio that I used for the dyno was 2622/35.. so basically 75RPM per 1MPH.  
  92degF with 42% humidity today
  I had my hopes high when I saw that other dyno at 190 wheel tq with the Dyno Dynamics..
  but I think the calculation was incorrect
  whatcha think?
• #1 by DVST8R on 07 Jun, 2006 22:18
• Looks good, you could use more fuel from 4400rpm on. That turbo spools late as far as diesel graphs normaly run, I am not sure if that is just your rpm conversion or if that is how it really is, but if that is the case you are primed to make some good numbers wtih a lot more fuel and some more timming above the 4400 rpm mark.
  
  Nice to see some real dyno graph's making there way here.
• #2 by malone on 08 Jun, 2006 00:05
• I like DynoJet as it's quite popular and shows more average numbers. A couple Dyno Dynamics here in BC exaggerate numbers w/ high correction factors.
  
  Wow, that turbo is a late spooler.. only 9 PSI @ 3,600 RPM? My 1.6TD with a small GT20 had 37 PSI at the same RPM, although it doesn't flow as much. You might have a perkier torque peak if you go with a smaller turbo. It might suit the 1.9 IDI's powerband better (overall). How is your smoke anyway? Do you feel that you need more fuel?
  
  To what extent did Giles modify your pump? Do you know how it compares to andy2's pump, which was also modified by Giles?
• #3 by RabbitJockey on 08 Jun, 2006 13:39
• so it's a tdi-m?
• #4 by RabbitJockey on 08 Jun, 2006 13:40
• Quote

  1.9L 1Y diesel
  Raceware headstuds
  ATP 8V turbo manifold
  T3 Super60 Turbocharger

  
  
  
  oh
• #5 by Staley on 08 Jun, 2006 17:04
• I called and spoke with Giles this morning about my dyno pulls and DVST8R's
  comment about more fuel.  Giles suggested that if I felt the engine needed more
  fuel.. to adjust the main fueling screw in a bit and try that..
  I did just that tonight and the results were very noticable.
  I gave the screw almost 1/2 turn in and had to back down the residual screw
  ALL THE WAY BACK.. then idle it down more with the idle adjustment.
  There is a decent more smoke thru the midrange and topend..
  and the power is also (seat of the pants) more noticable.
  
  My receipt from Giles says STG4
  I am not sure if that is the same as andy2's pump or not..
  
  I think i'll send it in next month for another upgrade.
  I ordered an EGT also
• #6 by Staley on 08 Jun, 2006 17:07
• Quote from: Trev0rbr

  so it's a tdi-m?

  
  
  hahaa I have a 20th anniv rabbit on the back and a TDI logo...
  so I guess they saw it
  
  "T"urbo and "DI"esel have TDI in it
• #7 by DVST8R on 08 Jun, 2006 17:45
• Quote from: "Staley"

  I called and spoke with Giles this morning about my dyno pulls and DVST8R's
  comment about more fuel.  Giles suggested that if I felt the engine needed more
  fuel.. to adjust the main fueling screw in a bit and try that..
  I did just that tonight and the results were very noticable.
  I gave the screw almost 1/2 turn in and had to back down the residual screw
  ALL THE WAY BACK.. then idle it down more with the idle adjustment.
  There is a decent more smoke thru the midrange and topend..
  and the power is also (seat of the pants) more noticable.
  
  My receipt from Giles says STG4
  I am not sure if that is the same as andy2's pump or not..
  
  I think i'll send it in next month for another upgrade.
  I ordered an EGT also

  
  
  Malone will have to corect me but i belive that is what his pump from the "franken motor" is.
  
  I am also concerned about dynamic timing as you reach into the 5000 area. I also thought alot more about it last night as I was lying in bed unable to sleep, and realized a couple of things:
  
  1. You obviously had enough fuel for the amount of boost you were running as the dyno peaks with your boost dead on. If you had insufciant fuel it would have peaked when the boost used up all availble fuel, and it would have shown up in the curve.
  
  2. I really think that the rpm scale is off by like 1500 - 2000 rpms based on every other dyno, or g-tech that i have seen for this motor, the t3 super 60 is a big hot side turbo, but in no way should spool that late, I would expect a holset hx-35 to spool at about that time and the hy-35 to spool earlier. Hopefully Andy2 will be able to prove that point.
  
  3. If you can you reall should try a g-tech to get some more acurate rpm #'s or somthing like a tach... or
  
  4. If you really are at that point of rpm, I think that you need more dynamic timing like in the 30 degree's range. You will have to talk to Giles about the posibilities of that happening though.
  
  5. Finally I  hope I don't sound to discourging you have put up some great base numbers, and with a litte more fuel and some more boost you will be in the 150's no problem. :wink:
  
  6. Okay this really is it. I wish I had my own dyno that I could test alot of this on... :roll:
• #8 by hillfolk'r on 08 Jun, 2006 18:18
• Quote from: DVST8R

  Quote from: Staley

  , I would expect a holset hx-35 to spool at about that time . Hopefully Andy2 will be able to prove that point:roll:

  
  
  
  and the hy-35 to spool earlier
  
  
  sweet,cause im  buildin a new  exhaust manifold for my tdi-m,and usin one of these....
• #9 by vwmike on 08 Jun, 2006 19:08
• Those are some damn impressive numbers. They kind of put my 1.6 to shame. I took it to the dyno a while back and this is what I ended up with:
  
  
  
  I figured it to be about 109 hp and 132 ft/lbs after figuring drivetrain loss at 18%.
  
  This is an '88 Jetta TD (1.6) with 371k km on the clock, AAZ headgasket, 2.5" exhaust, GTD nozzles, 10mm pump head, governor mod, and 26 psi. No intercooler or timing piston mods. The exhaust is still smokey at full boost. It's also mostly petrol diesel but there may be a bit of biodiesel in there too.
  
  I'm sure I'd make some better numbers if I started with a fresh engine and whatnot....but this one is still going fine.
• #10 by hillfolk'r on 08 Jun, 2006 19:34
• i turned up the fuel a little bit,just a little bit though... :shock:
  
• #11 by vwmike on 08 Jun, 2006 19:35
• What is that, a Cummins?
• #12 by DVST8R on 08 Jun, 2006 19:40
• vwmike, the no intercooler is what is killing you, that and there really is somthing to be said for a pro bulit pump with timing mods, differnt camplates ect... there is alot more then just pump size to numbers.  I really belive that the no intercooler your loosing 20+hp to heat, I have a couple of questoins though:
  
  1. What are you running for a downpipe?
  
  2. What is your static timming set at?
  
  3. What camplate with your 10mm head?
  
  
  Looking at your dyno you have the polar opposite to staley's you run out of air before fuel, that is why your dyno continues to climb with rpm, your tq peaks with boost, and then your ve contiues to improve with rpm as such so does your hp, despite runing more boost, you are moving less air or at least usefull air, part or this lies in the fact that Staley is running a bigger tubo with more "mass air flow vs psi" as well as a bigger hotside that is allowing the turbo to be more efficiant at boost.
  
  Wtih all of that being said I would bet that with good fmic or top mount setup like staley's and maching the timming piston cover, as per fsp gtd's guide, you would pick up at least 20whp, and depending on how much more fuel you could dump in with the new found air possibley 30whp.
  
  The highest non intercooled dyno with a stock turbo I have ever seen on a 1.6td with stock turbo is 134whp (props to deo for that) and he was running and ubsured amount of fuel from a 12mm (piers built iirc) pump as well 35+psi
  
  [\hi-jack] well sorta its the same thing just differnt dyno.  :wink:
• #13 by DVST8R on 08 Jun, 2006 19:41
• Quote from: "vwmike"

  What is that, a Cummins?

  
  
  That would be my guess.
• #14 by hillfolk'r on 08 Jun, 2006 20:40
• yea you guys didnt specify a dyno chart of a vw,heehee, its a hacked up n 14 for a customer that wants to test injectors(they build em),this thing is hacked,the engine is a celect plus that orig was 525hp,but we swapped some dude that came in with a 430hp celect,reprogrammed for 500hp,so i hacked the celect stuff on the celect plus engine,and voila,more hp than either one ever had
   i figured we would do good with 500hp,i didnt expect that extra 60
  she was whistlin man,,i was almost scared that it was gonna jump out the dyno cell and bite me!!!
  this was just a play run to get the dyno all setup and stuff so when the cust. comes in to start swapping injectors,we are all set( we musta made like 100,maybe 120 runs or more on this customers old 60 series that we tested on before,then we topped that engine off with a new set of liners,and had to run them at about a 200hp load for 100 :shock: hours,they do liners too)disregard the air intake temp,thats not what its hooked up to....