F-Body Europe

Today I had my car dynoed. So here are the results:

Max. engine Power: 378 HP (DIN) = 278 kW @ 5440 RPM
Max. Power at the Wheels: 342 HP (DIN) = 251.6 kW
Max. torque 537.6 NM = 396.5 lbs/ft @ 4190 RPM

Not bad for an A4 with 2.73 gears

That is a pretty killer torque rating there

Yeah, that torque is impressive! Where did you do the dyno run?

The dyno was done by BOSCH in Austria, Graz.

Temp. = 29 C / 84.2 F

Pressure = 976 hPa

I will post the graph soon so that you can have a look at it

Here are the charts and the corrected data:

max Power: 277.9kW = 378 HP @5440rpm
Power at wheels: 237.4kW = 323 HP
max Torque: 537.6Nm = 396.5 lbs/ft @4190rpm

(HP here are DIN-HP, ie. 1kW=1.36HP)

That makes a loss of about 55HP to the wheels.

Blimey, what mods have you got on the car?

Just some bolt on mods, to see them click over the picture of my ride in my sig.

I also have a video of my dyno run. I'm posting the link of the video-clip as soon as avilable.

Have you or anybody else here got dyno numbers of his car?

I don't as there are no dynos near me and I'm in the UK. What does your car run on the quarter?

I have never been to a quarter mile racing so I actually don't know about it. I'm going to the austrian race wars at the end of august in the near of Vienna and then I will keep you posted. Yesterday I have ordered a custom made 2.5" to 3" y-pipe fitting my stock manifolds and dual cats. I hope to get some better flow by them.

To me that power values look astronomic!
What have you done?
1)
Its just free ram air and the optimised air induction (the first thing every fbody driver is doing),

2) Aftermarket muffler (very common for most of us)

3) thermostat (any influence? i doubt)

4) ported and descreened MAF (maybe some <10hp), I had a look at mine and found no reason to take out the Dremel The middle segment of the MAF may even have some positive influence on the airflow, because its shaped like a wing. Now you have that small cross member there, which may cause more turbulenses than before. But okay, thats nitpicking.

5) increasing the max revs to 6300rpm: makes no sense, the peak of your power curve is still at 5500rpm

You have stock header, camshaft, I can also find no reprogramming, so where is the tremendous torque coming from??? Its about 100Nm more than stock!!!

I am really curious!

Nice #s. I can't wait to have my Z dynoed!

Congrats to your nice results!

It's always good to see that the money you invested in your car was not for nothing, right?

Too bad they canceled the Race Wars we wanted to drive together to Wien, but maybe you come up to Germany sometime

@Gunnar:

Porting the MAF not only smoothes induction airflow but also instigates an increase in ignition timing. This occurs because a ported MAF will report less airflow at identical engine RPM and manifold pressure as an unported sensor. This results in a lower calculated load causing the PCM to utilize a look-up table for a different curve.
For example, the PCM may command 28° timing advance for 100% calculated load at 6000 rpm. But at 78% calculated load at the same rpm, the PCM map may require 29-30°. Essentially, the PCM perceives that the engine is achieving 6000 rpm under a lighter load condition and adds ignition timing. This is something you should observe using a scan tool. Be certain that the fuel in the tank has at least 98 octane to support the additional ignition timing, otherwise detonation may occur. More ignition timing, up to about 28° for a lightly modified LS1 will result in a torque increase.

BTW, my PCM has been reprogrammed by Hypertech and my rev limiter is set to 6300 rpm because my tranny now shifts in the range of 6100-6200.

I will let you know about my quarter mile times soon

I never saw any power increas with my hypertech nor have I heard anyone else either. Only thing that was good for was gears, thermo, and tires. Porting the MAF is usually not recomened by anyone. I know when I did my ATI they had to put stock MAF ends on because the computer could not read the MAF correctly with out the screen in front. If it works for you that is awsome. Just be for warned for the future it may lead to problems if you go into your engine.

spade thanks for your advise Never mind about the screen as GM has not put the screen on their MAF since 2001 in f-bodies. As you said it works for me and I'm very happy with my setup.

Gonna to see you at bitburg this weekend...

I bought the March 04 issue of GM High-Tech Performance magazine.
On a LS1-testcar they spend about 2000USD for LS6 intake manifold, SLP long tube headers, high flow cats, y-pipe, SLP loud mouth (no muffler) and the SLP air temperature module.
With all that mods they achieved 347,4 RWHP, that was 37 over stock (which was measured before).
On the 1/4 mile they had 13,4sec before the mods and average 12,93sec with the mods.
(BTW: I think that is a too expensive 0,5sec better)

LS1, I think the dyno you used was too optimistic!

Curious to see what numbers he runs in Bitburg...

Ben

$2000 for half a second ain't bad. You start spending alot more when you move under mid-12s.

I may be mistaken but I think the f-bodys continued to use the screen but the corvettes do not. From what I understand is there cars are tuned to be used without them our are tuned to be used with them. No biggy. If your car performs without it the by all means do it that way. See what it runs for us.