FSI Acceleration Power Times Comparison

Crgwal

Crgwal

A2OC Donor
Scotland
Hello FSI owners.

I have had my fsi for two years now. It had been a long road to get the car where it is now.

Position Flap Arm - repaired
Air leaks - repaired
Oil leaks - repaired
Bad fuel injectors - all replaced
Various sensors - replaced.
Spark plugs and all things service related - done.
All new belts and timing - repaired.
Engine codes - there are zero of them.

I still feel like I am running low on power. I recently was out with my fellow driver in his 1.2 Peugeot 205 1994 and I matched his acceleration.

I am looking into getting the engine walnut blasted to see if my valves are causing me low power.

Let's start here?

Running on the flattest road I can find.

In 5th gear at 2000rmp. Steady speed. Then full throttle up to 3000rpm.

First shot. 15 seconds
Second Shot 17.5 seconds
Third shot. 16 seconds

Can I ask anyone for some feedback on what they experience with their FSI's?

Has anyone else done a walnut blast on their cars? I here other Audi forums use this process has anyone here.

Thank you for all feedback.
 
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If the valves were the cause, they would not be sealing when closed, and carbon build up can cause this. If this is happening, a compression test would confirm it. Better to get a compression test done, before committing to walnut blasting, or similar. If the compression test shows good compression on all four cylinders, then the cause of the poor performance is likely to be elsewhere. If possible, I'd try and find the fault before embarking on a fix.
Every petrol engine requires the same basics to work:
Fuel, compression, spark, in the right order, and right time.
Complex engines, like our FSI, further enhance the process, but check out those basics first.
Good luck 🤞.
Mac.
 
I am always willing to help a fellow FSI owner and thought it might be fun to help you out, but it was not!!!! I did what you asked and it was painful, hopelessly in the wrong gear.

My results.

Background. I believe my FSI is fit and healthy, 82k on the clock, engine warmed up with 90℃ on dash, just me in the car, no luggage but back seats present and a full tank of petrol. I have a long quiet very flat country road on the outskirts of Eynsham, in fact there was an pop-up airfield in WWII alongside, ideal for this test.

Weather. Hot for UK 32℃, no wind at all (would be good!). Auto on climate with Aircon activated, set at LO - essential!

Your times are a little down, I did what you asked, 2000 to 3000 rpm in 5th gear (horrible), clocked about 13.5 seconds every time on my computer app.

Further comparisons in more sensible gear selection over the same range.

2nd so brief, almost immeasurable, say 2 seconds me counting.
3rd, as for 2nd too brief to sensibly use the app, me counting about 4 seconds.
4th, quite quick but too brief again say 6 seconds (me counting).

Hope that helps.

Andy

Edit. Suggest you put the walnut question back in your other thread, change the thread title to something like 'FSI Acceleration Performance Times Comparison', this way it may be more readily found in coming years with Search.
 
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Crgwal said:
Hello FSI owners.

I have had my fsi for two years now. It had been a long road to get the car where it is now.

Position Flap Arm - repaired
Air leaks - repaired
Oil leaks - repaired
Bad fuel injectors - all replaced
Various sensors - replaced.
Spark plugs and all things service related - done.
All new belts and timing - repaired.
Engine codes - there are zero of them.

I still feel like I am running low on power. I recently was out with my fellow driver in his 1.2 Peugeot 205 1994 and I matched his acceleration.

I am looking into getting the engine walnut blasted to see if my valves are causing me low power.

Let's start here?

Running on the flattest road I can find.

In 5th gear at 2000rmp. Steady speed. Then full throttle up to 3000rpm.

First shot. 15 seconds
Second Shot 17.5 seconds
Third shot. 16 seconds

Can I ask and anyone for some feedback on what they experience with their FSI's.

Has anyone else done a walnut blast on their cars? I here other Audi forums use this process has anyone here.

Thank you for all feedback.
Click to expand...
I saw Andy's answer just after starting this answer, but here it is anyway.
It's a bit warm today, will try tomorrow, but, 2000 to 3000 rpm isn't an FSI's area of expertise. Max torque is at 4000 rpm, and up to just below 3000 rpm, the engine is running in eco mode, minimum emissions and minimum fuel consumption. The inlet flaps are up, and it's on lean burn, so it's almost a sin to try the 2000 to 3000 pull.
3000 to 5000 would be a much better demo of an FSI's condition.
I've been reading about logging engine data with vcds, and thinking to try and log engine speed while accelerating through the gears. The resultant spread sheet could convert speed in each gear to road speed.
We'll see how it goes, or not ...
Mac.
 
This is great information!! Thanks to both of you on your detailed comparisons.

I have just finished my drive down from the Highlands to Glasgow.

I'm not going to lie I am quite sensitive with my FSI. I do not always feel very comfortable being 3500rpm+ perhaps its ingrained into me to not push my FSI as it too can be sensitive. After reading your posts and gaining some confidence I decided (to my better judgment) let my car get some more RPS's between gear changes and gave it the old 'Italian Tune Up'

I did have a lot more enjoyingment out of the car this trip, I still feel it sounds a little rough at some of these engine speeds but perhaps it was a better way of driving it.

I am going to get a compression test done, I have had this done once before. Just before the mechanic put the new fuel injectors in. The only information i got was that 3 were fine and 1 was slightly low but not a huge concern. This probably being a better test other than our little speed tests but hey if anyone else can do the same that would be great :)

Before I go off topic anymore, thanks for posting your times.

Craig
 
I would be interesting in the same q and have VAG COM if we can do the test via this then Im up for giving it a go!
 
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