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TDI Power Enhancements Archives on TDI Power Enhancement related items.

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Old March 4th, 2008, 19:36   #61
bencarr23
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I just want to know what fuel mods you have to put down 265 hp.
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Old March 5th, 2008, 09:45   #62
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I am sure everyone would like to know.
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Old March 6th, 2008, 09:21   #63
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Quote:
Originally Posted by Ed's TDI
Okay so I understand that a 17% correction factor doesn't necessarily equate to a 17% increase/decrease in horsepower made but I'm curious why the dyno guys at Kinetic would choose 17% as their correction factor if your claim is that it should only be 1-2%. Their explaination, according to the techs from Dyno-Dynamics that setup their dyno and schooled them on how to use it, is that this was the correction factor to use for this machine in their location based on all the information they normally use to fine-tune all of these particular dyno units.

When your dyno was set up in your shop, you had a rep from that company help you guys out with instruction on how to use it, etc, etc, right? So why do you not use any correction factors, even though you already agreed that correction factors are used to ensure that you would get consistent results?
Ed's TDI - spins again!

http://forums.vwvortex.com/zerothrea...90061#46390061

What's new in your ride besides the tune? Hopefully we can hook up when I visit BC.

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Old March 6th, 2008, 15:44   #64
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Quote:
Originally Posted by bencarr23
I just want to know what fuel mods you have to put down 265 hp.
Quote:
Originally Posted by LNXGUY
I am sure everyone would like to know.
shhhh!!! its a secret...nobody should know...

Quote:
Originally Posted by jsrmonster
Hopefully we can hook up when I visit BC.

Jeff
plz do Jeff.
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Old March 6th, 2008, 16:27   #65
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Quote:
Originally Posted by joevat
shhhh!!! its a secret...nobody should know...



plz do Jeff.

Still waiting.
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Old March 7th, 2008, 14:21   #66
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A3 DYNO ACTION
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Old March 8th, 2008, 13:36   #67
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Default It's all about fuel (kind of)

I dyno'd IBW again today after upgrading from PP520s to PP502s. No other changes to the car. So you don't have to flip back and forth, here's the dyno from February 23:

The one that ends at lower revs is from the NE dyno day last fall.
And here's today's:

I failed to remind the operator to ignore the redline and keep going to fuel cutout, but I'm confident the curve would resemble the red line, which is the one from Feb. 23.
And here is boost and fuel/air tables.

The red line is from two weeks ago, the blue from today. The car did smoke more, no doubt, but it wasn't a blackout. And as you can see, boost is rock solid. My boostvalve is screwed all the way in--basically shut off. No spikes.

So to me it reads like a gain of about 12 ft/lbs. of torque and 19+ HP. I think I'm finally getting to the point where all the air handling mods are really paying off. The car did experience some significant heat soak on multiple runs: It may be time for larger intercooler piping.

Oh, and the odometer rolled over 180K last night. Head's never been off. Try that in a Subaru.
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Old March 8th, 2008, 13:40   #68
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Wow! Nice flat power curve there Peter.
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Old March 8th, 2008, 14:02   #69
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WOW
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Old March 8th, 2008, 14:18   #70
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Quote:
Originally Posted by IndigoBlueWagon
I dyno'd IBW again today after upgrading from PP520s to PP502s. No other changes to the car. So you don't have to flip back and forth, here's the dyno from February 22:

The one that ends at lower revs is from the NE dyno day last fall.
And here's today's:

I failed to remind the operator to ignore the redline and keep going to fuel cutout, but I'm confident the curve would resemble the earlier one, which is the one from Feb. 22.
And here is boost and fuel/air tables.

The red line is from two weeks ago, the blue from today. The car did smoke more, no doubt, but it wasn't a blackout. And as you can see, boost is rock solid. My boostvalve is screwed all the way in--basically shut off. No spikes.

So to me it reads like a gain of about 12 ft/lbs. of torque and 19+ HP. I think I'm finally getting to the point where all the air handling mods are really paying off. The car did experience some significant heat soak on multiple runs: Bill (at DSG) suggested that it may be time for larger intercooler piping.

Oh, and the odometer rolled over 180K last night. Head's never been off. Try that in a Subaru.

Very nice Peter!! I hope I can dyno soon too, I'm working on the intercooler now.
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Old March 8th, 2008, 22:44   #71
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Showoff!!!!
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Old March 8th, 2008, 23:42   #72
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Very nice power gain. You gained 20 hp just from going up in nozzle size from the .205's to .232's. Obviously there was room for more fuel ... which leaves me with some questions:

What kind of boost levels are you running with your setup? And what made you decide to go with the 502's over the R520's or the 7-hole R520's? Couldn't you run larger nozzles with the hybrid turbo and still produce enough boost to keep smoke levels down and produce enough power?
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Old March 9th, 2008, 05:44   #73
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Good questions. The third graph shows boost, pretty steady at 25 PSI from about 2K on. The second set of lines shows Air/Fuel ratio: The 502s brought it down from 16 to 15. I honestly don't know if further lowering this number would help or not. I suspect it might, and HP may continue to build as revs rise if the engine had more fuel.

I picked the 502s on Jeff's recommendation: He said he built the tune for those nozzles and an 11mm pump. So I went with it. I don't want smoke at low RPMs, and larger nozzles may cause that. And Kerma's 7-holes aren't available to me.

What I understand is that the ECU's fueling limit is 51mg/stroke. The way to get fuel beyond that is to put in bigger nozzles. But it's a compromise, because the car may over-fuel under light load, or smoke on tip-in when boost is building, in order to get the right amount of fuel at high load/revs. You can tune some of that out, but it's still a compromise. I want it all: good power, low smoke, good economy. This setup may deliver all three: I don't see any smoke in daily driving and I'm still getting low to mid-40s in mixed driving.

I've got a similar tune in my Golf, but set up for a 10mm pump and VNT-15 (class rules). I'm going to upgrade the PP357s in it to PP520s, and see if Jeff can tune out some of the fuel at low revs to reduce the spiking (the 15 does tend to spike with an agressive tune) and smoke so I don't attract attention on the track. I also need to keep EGTs down: some of the straights I run are well over 1/2 mile. It's all a balancing act.

EDIT: Remember, this car also has 180K on it. I want to go to 250K before pulling the head and doing some rebuilding/upgrades. So durability is important, too.
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Old March 9th, 2008, 08:33   #74
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Just for some comparison to IBW's car, here is mine from the same dyno, same day last fall. I'm running PP520's with RC 3 ASV and BLUBYU's OMI. Stock IC, IP, Airbox, intake and piping.

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Old March 9th, 2008, 09:41   #75
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Those are great curves, actually both you and Peter's car shows what good tuning can accomplish.
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