Took the S6 to the dyno

A6 All/ S6 All
#1

I picked my S6 up at the beginning of the year. It has 100k miles. It is in pretty good shape.

The first thing I did when I bought it was an oil change, brake fluid plush, power steering flush, ATF change, and differential oil change. I also changed the air filters and spark plugs.

I still need to do the carbon cleaning. I’m pretty sure my flaps are broken in the intake manifold.

I took the car to an auto sport shop right by my work, Edge Auto Sports. The dyno results were disappointing but what I expected from previous reports on this site. It maxed out a 281HP@6000RPM. I’m also at 5300ft altitude with 91 octane gas.

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#2

Well that’s depressing… ECU and TCU tune? Should be much better after new intake manifold, carbon cleaning and injectors if necessary.

#3

It’s kinda what I expected. I was hoping for 300hp but figured it would be high 200s for what I have seen on other dynos. I’m not sure how much my altitude makes a difference either.

I think the carbon cleaning and intake manifold will make a big difference. I do not have a tune yet. Once I’m done with basic maintenance like the manifold, etc, I will probably do the JHM tune.

I plan on a dyno after each step. It won’t be a one for one, but close.

#4

For a modern non-boosted car the power loss is about 2.5% per 1000 feet on average. Back in the day they use to quote 3% for carbureted engines which don’t adapt as well to thinner air as a modern fuel injected engine.

#5

2.5% per 1000ft is more than I expected. That is a considerable amount to lose. I would be interested in doing a dyno at sea level.

#6

Hey just thought I’d add this since I get so much help from this forum… I had broken flaps at 50k. Hated the car with the loss of low end torque. Anyways I did some searching and found carpartsonline.co.uk., or some version of that and bought a peirburg intake for 1400usd and sold the old one on ebay for 400. I swear I thought it was a scam but sure enough it arrived within two weeks.

#7

Dynos are great but it’s so hit and miss. Since all dynos read different you can really only hope for an average number that makes sense per dyno used if that makes sense.

Also you have to take into consideration the cars ECU will pull tons of power depending on the conditions and since dynos are not the most welcome conditions. You can add that. But given the 5000+ feet and who knows how good the intake manifold is… and that is a bit piece of this puzzle I would think that number probably makes sense.

Do the injectors… then the CC… then make sure the intake is good. Check the PCV system and look to JHM for the performance. The ECU and TCU tune really transform the car.

If your in the USA look to just order the intake manifold from JHM as they get the latest versions of the intake maifold. There are TONS of old style intake manifolds out there in some of these parts warehouse type parts companies. And you don’t want the old pre update intake. If your in the uk then depending on import tax it’s still a good idea to look at JHM for the intake due to currency differences.

Obviously if that isn’t an option look else where. But that would be the suggestions. I have… Welcome to the Audirevolution family. We’re all here to help. ALWAYS feel free to ask if you have any questions.

#8

I’m not taking the dyno numbers as gospel. Just wanted to see what the numbers were. I have a local drag strip that I will one day get set up to see what 1/4 mile times I get.

I’m pretty confident my intake is shot. I can hear it rattle in the intake at idle. I’m going to borescope the intake from the top just to confirm before I purchase a new one.

I plan to do carbon clean the intake valves, replace the intake manifold, replace the PVC , and have my injectors flow tested.

Once all the basic maintenance is taken car of I plan on the JHM tune and possibly the transmission tune as well. I’m planning on a cat back exhaust as well.