Last update: Oct 21, 1994

The idea of this data base came from Peter Tong, however his original data base got lost when he graduated.
This is also an amateur way to finally measure performance changes, and for me personally, a way to check whether something went wrong with my cars over time.

How it works: Measure how long it takes to reach the following speeds from a coasting start on a flat road in the following gears:

3rd: 40-60 mph
4th: 40-60 mph
3rd: 50-70 mph
4th: 50-70 mph

Repeat these test several times after you perform your upgrades on the same road under similar conditions (same ambient temp, car warmed up, same tire inflation, same gas tank level).
Obviously, the higher speeds must be performed where it is legal to do so, and out of the way of general traffic ;->

I have found that there is about a 10% error in these measurements. I have also collected other data.
As Peter explains below, these tests are "healthier" than a 0-60 mph spurt as it stresses your car components less. Furthermore, 0-60 times also depend on the quality of your tires, while the above don't and are therefore more repeatable.

Jan Vandenbrande

Induction: 79 Rabbit Manifold, match p&p w/larger Golf Throttle Body Injection: Stock 82 CIS-Lambda, 82 Jetta 80mm meter plate, fuel enrichment Head: Stock 84 Scirocco (decked), modified combustion chambers, G-grind cam Block: 90 Audi 80 3A block, piston oil squirters, hydr. style oil pump, stock Audi 80 oil pan, Audi 80 windage tray Ignition: 87 GTI Knock sensing ignition, set to 8 BTDC Exhaust: Stock 82 manifold, downpipe, flexpipe to cat, 2" pipe to supertrapp Transmission: 82 FN Wide ratio tranny, 210mm GTI clutch, pressure plate, 86 GTI flywheel
Suspension: stock, except for 87 Scirocco 16V lower stress bar Other: 89 GLI 16V Radiator, 88 Oil water intercooler

Estimated hp: 130       Estimated curb weight: 2180-2200 lbs.
40-60 (3rd) 4.6 sec     40-60 (4th) n/a
50-70 (3rd) n/a         50-70 (4th) 7.9 sec

0-60: n/a

With TT exhaust

40-60 (3rd) 4.3 sec     40-60 (4th) n/a
50-70 (3rd) n/a         50-70 (4th) 7.5 sec

0-60: n/a

90 G60 Stock + K&N + Syntec + MTL
--------------------------------- [JHV] 3rd: 40-60 mph 4.42 - 4.73 secs
5th: 50-80 mph 9.9 secs

90 G60 AT S II + K&N + Syntec + MTL
----------------------------------- [JHV] 3rd: 40-60 mph 4.04 - 4.11 secs
5th: 50-80 mph 8.5 secs

90 G60 AT S II + 260 CAM + K&N + Syntec + MTL --------------------------------------------- [JHV] 3rd: 40-60 mph 3.7 secs [NOT ENOUGH DATA TO BE SIGNIFICANT]

90 G60 AT S III + K&N + Syntec + MTL
------------------------------------ [JHV] 3rd: 40-60 mph 3.4 secs [NOT ENOUGH DATA TO BE SIGNIFICANT]

92 SLC + K&N + Syntec
--------------------- [JHV]
2nd: 20-40 mph 3.07 - 3.40 secs
3rd: 40-60 mph 4.60 - 4.80 secs
3rd: 60-70 mph 2.89 secs
4th: 50-70 mph 5.64 secs

92 SLC + TBody + K&N + Syntec
------------------------------ [JHV]
2nd: 20-40 mph 3.42 secs
3rd: 40-60 mph 4.20 - 4.60 secs

4th: 40-60 6.8 stock, and 5.5 with std tricks (?)

5th: 50-70s 7.1 seconds

>From lynx.unm.edu!umn.edu!news-feed-1.peachnet.edu!gatech!swrinde!cs.utexas.edu! wupost!gumby!calvin!ursa!jtong73 Wed Jul 28 08:41:06 PDT 1993 Article: 18048 of rec.autos.vw
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>From: jtong73@ursa.calvin.edu (Joanna Tong) Subject: Re: [w] Forming a performance database Message-ID: <CAoK3M.pJ@calvin.edu>
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References: <CAMqFs.7Ex@calvin.edu> <CAMssG.902@dove.nist.gov> Date: Sat, 24 Jul 1993 17:47:45 GMT
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I pretty much just find myself as flat a freeway stretch as possible, then try to get onto it between the "waves" of cars that come so that I have room. I get into the gear I want to test, pull out my trusty casio, flick it to stopwatch, get up to the speed I want to test from (40 or 50) and while holding that speed absolutely punch the gas while at the same instant hitting my stopwatch, then the moment the car goes through the target mph I hit the watch and then let off. I usually do runs in both directions just to make sure the times are accurate (depends on the flatness factor). This is pretty much how I measured progress on my previous car an '83 GTI and how I currently test my 82. I used to do 0-60 but found traction problems usually skewed the times depending on the quality of the launch. This is not to mention the stress a "drop the clutch" launch does to the downpipe studs - esp if you don't have the techtonics front mount - and to the CV joints, (the whole drive train). On my 83 GTI I usually did 40-60 in 4th (6.8 stock, and 5.5 with std tricks) and occasionally 30-50 in 3rd. On the 82 I do 40-60 in 3rd and 50-70 in 4th. I got the 50-70 in 4th from reading David Kennedy's response to Neil Martin's critical letter concerning the Lurching towards Success II article in VW & Porsche - there Kennedy quotes a time of 7.2 seconds from 50-70 in 5th (.91) which in my car is the same thing in 4th since my 4th is .91. Since I modeled my car after his, I can see I have a ways to go. Our cars are pretty much the same except that this guy has a ported and polished head and Schrick 280 last time I heard. My convertible (thanks to the 80 kg top) weighs in at 250 lbs more than his lightweight 84 GTI though. Recently I heard from Mecca Coolant company that he was using their Mecca Coolant along with an Oettinger modified head gasket to run his 84 GTI with 11.5:1 or some higher than normal compression ratio. Supposedly he is writing an article about it that should come out soon in EC.

Regarding your car being "stock", stock for you means modified for me, since most all the mods I've done have just brought my car's engine up to your 1990 "stock" level. In fact, your 2.0 16V in stock trim may put out slightly more hp than my 2.0 8V (134>130). I liked the rpm range for the 40-60 test in 3rd because it tests from 3000 to 4500 rpm on even the wide ratio trannies. I think this is a balance between high rpm power (highway) and low end grunt (for in-town throttle response). Oh well, just my $.02 hope it answered your question.

Pete Tong

Jan, your SLC should do around 3.7-3.9 seconds or so - based on 2 other SLC owner's figures (sample =2 isn't that reliable but still). Those are in 3rd gear also = 1.30 ratio. Not sure if the timing is even adjustable on those cars due to the motronic - On the Audi 80s it isn't hardly adjustable at all. I'd just make sure that whatever the computer uses to measure the vacuum (load) is feeding the correct signal to the black box. I also test both ways to average out the times....

peter tong
'82 2.0 8v Cabriolet

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