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Go Back   TDIClub Forums > VW TDI Discussion Areas > TDI Power Enhancements

TDI Power Enhancements Discussions about increasing the power of your TDI engine. i.e. chips, injectors, powerboxes, clutches, etc. Handling, suspensions, wheels, type discussion should be put into the "Upgrades (non TDI Engine related)" forum. Non TDI vehicle related postings will be moved or removed. Please note the Performance Disclaimer.

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Old April 26th, 2000, 21:52   #1
colucci
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Join Date: May 1998
Location: MPLS, MN USA
Default New Dyno results

OK here's tonight's results with last year's added in. All numbers are at the engine and assuming 17% transmission loss.




The short of it: 127 HP and 258 ft-lbs torque!!! That's 37 hp and 109 ft-lbs torque higher than stock.

The long of it: Last year's were done with the Wett chip alone. This year I have a TT cat-back and a bleed to 19 psi sustained. There is a constant 10-12 HP gain across the entire rpm range. What's more the useful HP is extended out to 4500 rpm.

I kind of blew it, though. I adjusted the bleed between runs so I could compare 19 with 24 psi. I didn't have the guy check it before the run and I didn't bleed enough. Run 2 is at 20 psi, which is not enough to even compensate for the "hot engine" fall off.


Overall, I'm pretty pleased with the A3. My need-for-speed addiction is still pretty strong. I think there's a 2.5" downpipe in my future

D'nardo

------------------
98 Jetta TDI: mit Wett chip
Bleed, Shine Racing springs, Bilstein HDs, Hella dual rounds
Descreened, Naylor ramair, Quiafe TBD, 0.72 5th gear
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Old April 27th, 2000, 00:59   #2
BIGJOHNO
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Join Date: May 1999
Location: Frozen Tundra
Default Re: New Dyno results

I'm not sure how to do the 17% loss math, but it is either 149 hp or 153 hp from the engine? And this is on the A3. So, 250 lb-ft was conservative. Hmm, does anyone with the a4 and all the Skypup mods have a dyno graph?

John
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Old April 27th, 2000, 02:20   #3
Traumamike
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Default Re: New Dyno results

Holy Crap! What did you do to that thing? Very nice power, and very nice data. Thanks for sharing!
-Mike
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Old April 27th, 2000, 05:06   #4
SkyPup
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Default Re: New Dyno results

For some reason only the top 1/10th of the dyno chart comes up

However, I believe every single pound of torque and HP pounding out of that awesome TDI engine with your mods, way to go! And thanks for showing us what a TDI motor can put out in the proper hands, that is a super smooth power output for sure!

With you higher 5th gear and Quaiffe diff, I bet this is one of the top TDI this side of the Atlantic. Maybe James Sly of European Car can do a write up of your ride for their publication. They sure did make up the ABD TDI for good and it wasn't close to the super slick TDI ride you're piloting!
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Old April 27th, 2000, 06:33   #5
colucci
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Default Re: New Dyno results

The chart is ENGINE POWER, wheel power is 17% less. At the wheels, I'm getting 105.6 HP and 215.2 ft-lbs torque. Remember, this is a lowly A3

Actually, there's some debate about 15% vs 17% loss, but with the Quaiffe I bet 17% is a pretty good guess.

D'

------------------
98 Jetta TDI: mit Wett chip
Bleed, Shine Racing springs, Bilstein HDs, Hella dual rounds
Descreened, Naylor ramair, Quiafe TBD, 0.72 5th gear
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Old April 27th, 2000, 09:39   #6
Craig
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Default Re: New Dyno results

Interesting that your peak HP is at a much lower RPM than stock specs. Never seen that before.

Got to be a way to do a bleed on the A4 for higher sustained boost.
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Old April 27th, 2000, 10:12   #7
tomo366
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Location: Kensington, Maryland USA
Default Re: New Dyno results

colucci,
Are you using the Dawes bleed Device?
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Old April 27th, 2000, 11:16   #8
colucci
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Default Re: New Dyno results

No. I never installed it. If I understand what I read in the instructions, the Dawes valve essentially replaces the electronic wastegate controller. You set the boost that you want the wastegate to open at, otherwise it doesn't open. I decided not to try it, mostly because I'm chicken!

My bleed is $4 fish tank valve from Petsmart. I bleed the boost line that goes into the ECU. It thinks there's less boost than there really is.

D'
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Old April 27th, 2000, 14:38   #9
Karl Roenick
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Default Re: New Dyno results

106 hp at the rear wheels?
I thought it has been shown that stock, the car makes 90+ hp at the rear wheels.
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Old April 27th, 2000, 14:43   #10
CFriedriszik
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Location: Landau, Germany
Default Re: New Dyno results

This should be no insult or something, I am just curious:
I have read several times from several people the phrase "at the rear wheels" - is that a standing phrase with no regard to which drivetrain the car actually has (FWD,RWD,AWD) ?
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Old April 27th, 2000, 18:00   #11
Karl Roenick
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Default Re: New Dyno results

....at the driven wheels.
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Old April 27th, 2000, 18:11   #12
GoFaster
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Location: Brampton, Ontario, Canada
Default Re: New Dyno results

I find it odd that peak power is at just 2900 rpm. Useful, but odd

That is one massive increase in torque compared to stock ! ! !

Brian P.
'96 Passat TDI
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Old April 27th, 2000, 18:43   #13
colucci
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Default Re: New Dyno results

I remember SkyPup writing how the GT15 turbo was optimized for low rpm. Notice how the torque drops like a rock after 2000 rpm. I am certain that the VNT 15 has a flatter torque curve. If you could flatten my curve out even 15%, you would see peak power closer to 150 hp.

We need an A4 dyno with torque numbers to really get a good comparison...Mickey? SkyPup? HowardZ?

D'

PS. Just a thought...I have about 20k on my foam RamAir filter. Maybe it needs to be cleaned?

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Old April 27th, 2000, 18:56   #14
TDI Steve
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TDI(s): 2000 Golf
Default Re: New Dyno results

Incredible....
I'm curious, is it possible to put a car with an automatic transmission on a dyno?
I just got my supersprint exhaust and BMC air filter, I'd like to do a dyno run after they're installed. I'm also planning on removing the MAF screens and whatnot, but I'm going to hold off on the turbo tweak.
Sorry to have babbled about myself...

once again, absolutely incredible!
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Old April 27th, 2000, 20:01   #15
Gary Miyakawa
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TDI(s): 1998 NB TDI
Default Re: New Dyno results

Colucci,

Great numbers!! One question, how did you record RPMS ???? That was the problem I had with my Dyno runs...

Gary
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