Request for gents with a data logger:

[ArthurPE]

it doesn't appear cleaning alone makes a difference...
difficult to discern, because most of those cars are modded
but unmodded/uncleaned are ~ the same speed, and faster than spec, in fact as fast as using the gears...

the conclusion I draw is that deposits make negligible difference (if any) and mods might be worth a few 10'ths...

I'm only interested in order of magnitude...not fractions...
and the avg max is 8.3 (better than spec & a avant), the fastest is 7.2 avg min
my best avg runs 7.5 w/passenger (cold & dry)
the overall avg is 7.8 std dev 0.4, below spec...

if deposits were robbing 50+ HP I would expect to see the high mileage cars >9.5 sec or so, not the case

I've been adding the data as it is posted...

[Gumball0r]

Ran a 100-200 km/h run yesterday with a bit rubbish change from 3rd to 4th gear.
9,6 sec.
Seemed fast, but then I saw a B5 RS4 with 425 hp. on youtube doing it in 9,3 sec.

[ArthurPE]

Ran a 100-200 km/h run yesterday with a bit rubbish change from 3rd to 4th gear.
9,6 sec.
Seemed fast, but then I saw a B5 RS4 with 425 hp. on youtube doing it in 9,3 sec.

~62 to 124

Auto Motor und Sport
0-100 4.9
0-200 17.1
100-200 = 17.1 - 4.9 ~ 12.2
yours is veeery fast!

R&T
60-120 = 16 - 4.5 ~ 11.5 sec...
est 62 to 124 from graph and extrapolation: ~ 12.2

R&T (different test)
60-120 = 15.3 - 4.3 ~ 11.0 sec...
est 62 to 124 from graph and extrapolation: ~ 11.6

C&D
60-120 ~ 16 - 4.6 ~ 11.4
est 62 to 12 ~ 12.1

avg ~ 12 flat

[Gumball0r]

I'll try to get it on video next time. Starting to look like I'm making this up. I mean, 2,5 sec faster than magazines seems wrong. Even adding a few tenth of a second (maybe a whole) due to the way I time it (laptimer from OBC isn't as accurate as magazines way of timing) wouldn't make up for it.

[ArthurPE]

I did some 0-120 runs and got ~16 sec, that is the same as the magazines got...
this can vary more because of the shifting
the 3000-8000, much more consistent, no shifting

if it was cold and dry out with high atm P, that could easily cut a 1/2 second from the test times

[P_G]

Ran a 100-200 km/h run yesterday with a bit rubbish change from 3rd to 4th gear.
9,6 sec.
Seemed fast, but then I saw a B5 RS4 with 425 hp. on youtube doing it in 9,3 sec.

The B5 probably has 400+ ft/lb's of torque though compared to your OEM 313, it does help a lot.

[SR71]

Bloody hell guys, the speedo is out by a huge amount on some cars...mine always reads about 8kph low whatever speed I'm doing.

Using the speedo to time anything is a waste of time. You might be 15kph short on the true interval if you're not accurate with the lap timer activation...

Plug VAGCOM in and let it do its work.

Now would be a good time here in S. Wales...pressure is 1040mb and 0C!

[ArthurPE]

Bloody hell guys, the speedo is out by a huge amount on some cars...mine always reads about 8kph low whatever speed I'm doing.

Using the speedo to time anything is a waste of time. You might be 15kph short on the true interval if you're not accurate with the lap timer activation...

Plug VAGCOM in and let it do its work.

Now would be a good time here in S. Wales...pressure is 1040mb and 0C!

that's why the 3000-8000 is better, the tach is pretty much dead on

my speedo is +4 at 70 and +7 at 120, GPS verified
so I just take that into account
but that is why I chose rpm vs mph as the baseline

[aidanjaye]

Ok Aurthur - got some more times for you.

Standard saloon car (apart from K&n filter), 34K miles, heads not cleaned:

No passengers (fattish driver), 1/4 fuel, level road, 7.5 degrees C, dry.

First run from 3000-8000 , 7.8 secs
Second run from 3000-8000 7.8 secs

Emm, average 7.8 secs.

[ArthurPE]

Ok Aurthur - got some more times for you.

Standard saloon car (apart from K&n filter), 34K miles, heads not cleaned:

No passengers (fattish driver), 1/4 fuel, level road, 7.5 degrees C, dry.

First run from 3000-8000 , 7.8 secs
Second run from 3000-8000 7.8 secs

Emm, average 7.8 secs.

good runs, sounds like you are getting consistent...
I did 1 today...guess what time? 7.8...1/2 tank, 19F, driver only

guys, if you would please review the attached spread sheet and post in this thread any any blanks or corrections that pertain to you... or any guys I have missed....thanks much

[aidanjaye]

Ok Aurthur - got some more times for you.

Standard saloon car (apart from K&n filter), 34K miles, heads not cleaned:

No passengers (fattish driver), 1/4 fuel, level road, 7.5 degrees C, dry.

First run from 3000-8000 , 7.8 secs
Second run from 3000-8000 7.8 secs

Emm, average 7.8 secs.

good runs, sounds like you are getting consistent...
I did 1 today...guess what time? 7.8...1/2 tank, 19F, driver only

Yep - I'm pretty happy with that (7.8s) considering car is standard.

[ArthurPE]

3 more runs
~40F, high humid, low atm P, correction factor ~0
full tank of fuel
on at <3000 ~2900
off at >8000 ~8100 ~ rev limiter

8.2, 8.2, 8.2...how's that for consistency, lol
stock ~ 8.4
4 magazines 8 flat using all gears

[ArthurPE]

I've added a sheet with a graph...

a couple of things stand out:
avg 7.8 (vs rated 8.4 and 8 flat using all gears)
only 1 point (2%) exceeds the rated 8.4, and it by only 0.1 sec
the same guy also did a 7.9
the guys who did 8.4's also did faster runs ~8.2
no ones average >8.3

from basic estimation/extrapolation techniques for HP/wt
if some one was down 15% HP (~60 HP or 350 crank) their times should be >9.2 sec vs 8.4...there are none...
the closest is 8.5...vs 9.2+
and some have claimed even higher for deposits, as low as 330 HP

can't find any advantage for cleaned cars (although the sample is small)
it would seem modded cars may have a 0.1 -0.2 advantage against some cars, but not against others...

[Billy]

I was out early this morning bedding in some new pads and discs and after I decided to do some more runs.

Now I picked the car up from MRC yesterday, the intake valves had been cleaned and the oil and filter changed.

Also the Sachs clutch and flywheel kit had been installed.

2.5ºC, Saloon, Driver only - 95KG, Less than 1/4 tank V-Power, level road, dryish surface.

1st run - 7.0s
2nd run - 7.0s
3rd run - 7.1s

I was quite surprised with these times considering I was getting 7.7s last time. But I repeated the runs the same way as last time. The Sachs clutch kit definitely revs faster thats for sure.

The pictures from before the intake valves were cleaned weren't that bad actually, even Doug said so. I'll post them up once I receive them.

[ArthurPE]

I was out early this morning bedding in some new pads and discs and after I decided to do some more runs.

Now I picked the car up from MRC yesterday, the intake valves had been cleaned and the oil and filter changed.

Also the Sachs clutch and flywheel kit had been installed.

2.5ºC, Saloon, Driver only - 95KG, Less than 1/4 tank V-Power, level road, dryish surface.

1st run - 7.0s
2nd run - 7.0s
3rd run - 7.1s

I was quite surprised with these times considering I was getting 7.7s last time. But I repeated the runs the same way as last time. The Sachs clutch kit definitely revs faster thats for sure.

The pictures from before the intake valves were cleaned weren't that bad actually, even Doug said so. I'll post them up once I receive them.

last runs ~7.7
with a full tank, valves cleaned

these ~7 flat, 1/4 tank, LW clutch, and it was cooler...

big difference in times!

are you saying the valves were cleaned once, and just cleaned again ~5k miles later? is there any mods to the crankcase breather system?