igozoom97a4

I have a 97 A4 1.8T w/ GIAC Chip and Neuspeed G2 Catback Exhaust. I'm quattro & tiptronic.

Here are the results:
(horsepower is at the wheels per Matrix Engineering's AWD Mustang Dynometer)

Run 1 (stock air filter) - 107 peak hp
Run 2 (stock air filter) - 102 peak hp
Run 3 (stock air filter) - 98 peak hp

obviously heat soak sets in quick with stock intercooler.

The car sat for a little bit while we fought with the airbox to put in the K&N.

Run 4 (K&N) - 104 peak hp
Run 5 (K&N) - 96 peak hp

It was really hard to differentiate the heat soak differences from the filter differences, but I figured it was at least evidence that either filter really doesn't make a noticeable amount of HP difference.

I know that I'm going to get drivetrain loss w/ the tip and w/ the quattro, but why would I see such drasticly smaller #'s than GIAC's suposed 200 flywheel estimates? losing 93 hp to drivetrain & tranny????

As a comparison, two other guys ran with A4 1.8T's.

2000 A4 1.8T Quattro, Tip, APR chip, Remus Muffler: 120.4 peak hp

1999.5 A4 1.8T Quattro, Tip, 1.2 Bar chip, manual boost controller piggybacked with chip, open air filter element, FMIC: ~125 or so peak HP IIRC

I think that the FMIC certainly helps explain the big difference between me and the 1999.5, but I totally thought I'd pull better #'s than the 2000 with a chip & muffler. I have a full exhaust afterall.

Do you think that its the DBW vs. Non-DBW? The age of my car? (mine is 87k miles old)

Help me out with some thoughts...


<img src="http://pictureposter.audiworld.com/37413/dyno4.jpg">

<img src="http://pictureposter.audiworld.com/37413/dyno6.jpg">

igozoom97a4

<img src="http://pictureposter.audiworld.com/37413/graph1.jpg">

<img src="http://pictureposter.audiworld.com/37413/graph2.jpg">

Audi2ptzero

It comes with a slightly new K03 design, which will flow a little more air flow(cfm). The other non dbw was pushing his a/f ratio more toward the lean side by adding more boost on top of what the ecu things it is running. Running leaner will make more power but at a risk of damage or extra wear to the motor.

Your #'s were slightly lower, so you can look at a few things.

1. Are you making 100% of the boost that the chip is tuned for.

2. The turbo could be worn out, which will cause to run flow less air.

3. Is the compression low on your motor.

Audi2ptzero

You will notice all the cars are much lower then the normal 20-25% drive line loss used for most dyno tests. If you figure out that the apr one should make 200 hp but only made 120 hp, then it was seeing a 40% drive line loss for the quattro and tip tranny. If you apply that to your 107 you will get 178 hp which is still a little low since you should be making about 190-195 crank hp on the non dbw. The 2000 will make more power since it has a K03 that produces more cfm(air flow) at the same boost level a non dbw K03 runs at.

Stratocaster1422

are the APR claims 200hp at all wheels? or is that crank hp?

Ray Khan

new valves? I have been meaning to have it checked just for the hell of it to make sure everything is ok.

StevenH

crank

xr4tic

if you do a compression test, then add a little oil to the cylinder, and the numbers go way up, then it's bad rings.

Stratocaster1422

what are the typical drivetrain losses in a quattro manual?

xr4tic

Temp? Altitude?

How old were your spark plugs? Last oil change?

Do you have heavier wheels than the other cars?

Different octane gas?

If you plot your runs against the others, does it start out the same and fall off, or is it less the whole run through?

The FMIC doesn't really make HP, it just keeps the HP from going away, unless the chip has been programmed for the IC, which will add some power.