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TDI Motorsports This section is dedicated to the folks who push the TDI to the absolute limit racing. Topics should include articles about TDIs in the SCCA ProRally Series, Drag Racing, AutoCross and any other events that include TDIs.

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Old May 9th, 2017, 08:47   #31
Petra's cousin
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More or less. It kinda depended on if it was during a set of runs or if it was after a long break. This year I now have a pyrometer and I'm going to try adjusting pressure based on that feedback.
Stephen
Thanks. Looking forward to getting the wagon out (although it looks like a rainy weekend right now).

John
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Old May 10th, 2017, 19:35   #32
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Do High Performance Driving Experiences (HPDE) count? If they do, I've done one so far and looking to do more this summer. I attend the HPDE that is offered through http://www.mvptracktime.com/index.html the one I went to was at Road America and had a great time even though I was the passenger. I was able to get some video from the track too, so I'll add a link for that.
I ran my Jetta for that event and for the upcoming ones, I'll be using the RTDI that I picked up a couple of years ago and will finally have ready this summer.
Here's a link to that build.http://forums.tdiclub.com/showthread.php?t=442967

The Jetta "build thread" http://forums.tdiclub.com/showthread.php?t=265112

The videos. https://www.youtube.com/watch?v=ujc-FFUiyXs

https://www.youtube.com/watch?v=ZiztH8626og

If you're in the Mid West I'm planning on being at the July 16th track day for those that may be interested in also attending.
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Old May 13th, 2017, 17:35   #33
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Thanks. Looking forward to getting the wagon out (although it looks like a rainy weekend right now).
John
Two autocross sessions today with 4 runs in each session - started with the tires at 43 front/41 rear (cold) and did the first four runs to get the feel for the car. Bumped them up after lunch, found them running around 45 hot for three of the tires (driver's rear was around 43 and cooler than the other tires), need to run more pressure in the fronts based on the chalking I did, rears were fine.
Loved how well the car rotated with just a rear GTI bar and trail braking, also loved the torque coming out of the corners - it was easy enough to hammer the throttle as soon as I saw my line open up and have the car pull me through.
Had lots of hooting and hollering from the course workers in one section, guess I was lifting the inside tire off the ground (hence the cold driver's rear tire, lots of fast left-handers in today's course). I hope the photographer got some good shots of me with the back wheel in the air, I may just have to pay for one or two of his shots!
Overall, I improved ~3 seconds over the first set, then another 3 seconds on the second set (but there was a minor course change for the second set which made the left-handers much much faster), but still slow as molasses (near the bottom of the RAW times before the novices joined in the afternoon) and there's no point in comparing PAX times as my 235's pushed me into FSP with the 911 near the top of the standings.
All in all, it was great fun. Tomorrow, back in the Miata with my wife where we are only slightly more competitive in STS with a mostly unprepared car. If they end up running autocross into October/November after we put the Miata away, I'll definitely drag my wagon back out again for some more fun.
John
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Old May 14th, 2017, 07:51   #34
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The wheel lift comment above reminded me that a corner worker got a video of me doing that.
On a related note, and if anyone cares to watch, Ive been recording video of my races and posting the best runs on YouTube. I like to think Im improving.
Its interesting how much difference speed and track surface makes for understeer. In the parking lot stuff, the best I can hope for is to make the back end rotate. But with HSAX, the rear doesnt slide all and the front can aggressively turn. That was a tad disconcerting the first time it happened. On the plus side, it got me to stop breaking hard in a turn
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Old May 15th, 2017, 06:30   #35
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The wheel lift comment above reminded me that a corner worker got a video of me doing that.
On a related note, and if anyone cares to watch, Ive been recording video of my races and posting the best runs on YouTube. I like to think Im improving.
Its interesting how much difference speed and track surface makes for understeer. In the parking lot stuff, the best I can hope for is to make the back end rotate. But with HSAX, the rear doesnt slide all and the front can aggressively turn. That was a tad disconcerting the first time it happened. On the plus side, it got me to stop breaking hard in a turn
stephen
Thanks for the video - now think wagon instead of hatch with the back wheel in the air!

Yesterday, there was a civic and a mini doing the three wheel dance - the mini wasn't as consistent with lifting but the old civic hatch on bridgestones was easily lifting all the way around my corner then he actually got the inside wheel to stop rotating during braking into the next fast corner.

First thing i noticed on Saturday was how quiet it was auto crossing our TDI - there is no engine noise feedback like there is in our Miata when you rev it up in second gear. Then yesterday, there was a TDI hatch running in the first run group (while I was working one of the corners) and it was near silent as it went by (one guy asked if it was an electric car!).
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Old May 23rd, 2017, 17:36   #36
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Just registered for the remainder of the year with our local club, TSCC. I've no idea what class I'll be in (guessing street touring or modified) with my '15 Golf.
It's got VWR lowering springs on stock size wheels/tires (but Enkei PF01s), and running a Peloquin LSD with turbo-back exhaust and tune.
Looking forward to my first attempt, I'm sure it will be interesting!
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Old May 23rd, 2017, 17:58   #37
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Quote:
First thing i noticed on Saturday was how quiet it was auto crossing our TDI - there is no engine noise feedback like there is in our Miata when you rev it up in second gear. Then yesterday, there was a TDI hatch running in the first run group (while I was working one of the corners) and it was near silent as it went by (one guy asked if it was an electric car!).
The TDI's are too quiet! I can't hear my engine when at the track with the windows down, which makes shifting a little trickier. I find myself quickly glancing at the tachometer more than I would like.

Adjat84th,
You will have a blast! Don't worry about classes or lap times, just focus on your driving lines and being smooth. You will have a blast!
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Old May 24th, 2017, 07:28   #38
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The TDI's are too quiet! I can't hear my engine when at the track with the windows down, which makes shifting a little trickier. I find myself quickly glancing at the tachometer more than I would like.
I've been using Harry's Lap Timer and an OBD2 reader. That combo can flash the screen as an upshift indicator among other things. However over time I find I don't really need that so much anymore and mostly go by feel. Tho the notice was nice on long straightaways so I could judge if I was going to run out of RPMs before needing the brakes

Stephen
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Old May 24th, 2017, 10:02   #39
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I've been using Harry's Lap Timer and an OBD2 reader. That combo can flash the screen as an upshift indicator among other things. However over time I find I don't really need that so much anymore and mostly go by feel. Tho the notice was nice on long straightaways so I could judge if I was going to run out of RPMs before needing the brakes
Stephen
Agreed, if I don't hit the rev limiter (unlikely on Autocross, but I definitely hit it a couple times during our winter driving course on lake ice), I usually shift when I run out of acceleration jam.

John
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Old May 30th, 2017, 19:11   #40
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So here is one for the group: Yesterday was my first HSAX event. It started off with 3 20min HPDX sessions followed by 5 HSAX runs in the afternoon. The morning was fine but in the afternoon, I noticed that my times were getting consistently getting around .5sec slower each run. Aside from the first timed lap which I screwed up, I felt I was otherwise fairly consistent in my driving. Could the intercooler getting too hot account for this? The brakes were also steadily fading throughout the day. Would the increased stopping distance cause it? Something else?

stephen
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Old June 1st, 2017, 18:12   #41
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So here is one for the group: Yesterday was my first HSAX event. It started off with 3 20min HPDX sessions followed by 5 HSAX runs in the afternoon. The morning was fine but in the afternoon, I noticed that my times were getting consistently getting around .5sec slower each run. Aside from the first timed lap which I screwed up, I felt I was otherwise fairly consistent in my driving. Could the intercooler getting too hot account for this? The brakes were also steadily fading throughout the day. Would the increased stopping distance cause it? Something else?

stephen
Depending on how long you had between runs, then heat soak is a definite possibility. Have you upgraded to a better brake fluid? That can make a difference like you mentioned how your brakes were fading as the day went on. If you haven't upgraded to a better brake pad, that would be another thing to look into. Sometimes it's the little things that make a big difference.
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Old June 2nd, 2017, 06:24   #42
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I run ATE Type 200. It's not as good as the Motul RBf 660 but it's a fraction of the cost. More likely the fade was from OEM rotors/pads and really aggressive braking on a track that is known for being rough on the brakes. This weekend I'll see if there's anything left.

I was doing some comparison of the data I captured. Unfortunately the high speed GPS chose to not talk to the phone for the afternoon so it was a bit difficult to directly compare all of the turns. But I think it was a pile of little things. Braking appear to be a bit less, acceleration was a bit less, and more importantly driver errors were generally getting worse. So most likely it's because I was getting tired

Stephen
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Old June 9th, 2017, 05:55   #43
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I race hillclimbs with my '82 rabbit with a 1Z tdi swap. I run a malone tune, Holset turbo, and a pile of other stuff. Car does pretty well for what it is. In a sea of gassers, I've placed 2nd in class for the year twice

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Old June 10th, 2017, 07:28   #44
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Have you been to the track up here in Thornburg(right off I95} lots of turns 2.5 mile track maybe 100-150mph straight. Had dub delievence here that year.
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Old June 20th, 2017, 05:53   #45
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What ya running for a holset? find it boost quick enough?

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I race hillclimbs with my '82 rabbit with a 1Z tdi swap. I run a malone tune, Holset turbo, and a pile of other stuff. Car does pretty well for what it is. In a sea of gassers, I've placed 2nd in class for the year twice

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