carfanattic

<center><img src="http://home.t-online.de/home/loevenich/lpfoverlay.jpg"></center><p>I never thought that a sport exhaust makes such a difference even with the stock engine. the yellow marked line is with the stock exhaust.
Ralph

KenHuglr

unfortunate trade off downstairs in the torque department though.

Pelican18TQA4

Your posts subject header is confusing me...can you translate the dyno run for me...

berkel

I'm a little confused.

Is this a STOCK 1.8T making 18x HP or 18X TQ?

Is this a non quattro, I assume so since it's a dynojet chassis version.

Quite a loss down low as noted. Perhaps with a chip, the loss wouldn't be quite as pronounced...

Thanks,

FB

carfanattic

These are 2Dyno runs of 2 cars. Every plot is stock and chipped. I layed plot one over plot 2 to see the difference because car one has stock exhaust and car 2 has a sport exhaust. The bigger lines are car 1and 2 chipped. The lower lines are car 1 and 2 stock.
Hope this helps.
Ralph

Audiboy

Oh no! 2 different cars, could attributed to other things, like timing unless the ECU's where reset

berkel

Now it makes more sense, hehe.

Lower curves are HP for Car 1 and Car 2 with stock chip, one with exhaust.

Upper curves are HP for Car 1 and Car 2 chipped, one with exhaust and one without.

I thought they were HP and TQ curves for the same car, but it didn't make sense.

Are these just FWD A4 1.8Ts?

Good info, a stock A4 makes around 130 HP at the wheels, while the chipped version makes around 18x, not bad.

My GSR made about 140 at the wheels stock, but was at 173 HP and 124 TQ in its old form. With the new cams, new pistons, new intake manifold and whatnot, I'll hopefully be close to 200 HP at the wheels running high 13s in the 1/4 mile >8^D.

Thanks,

FB

berkel

Which car would be faster 1) at a drag strip 2) on the street 3) at an autox and 4) on a road course.

I'm surprised that a turbocharged car would lose so much down low. On the street it seems like it's enought to be noticeable. In racing conditions, the ability to rev higher and still make power should help though.

Thoughts?

FB

carfanattic

Both cars have over 190hp at the wheel at about 4600U/m with the chip. The car with exhaust hold the power much longer.
Ralph