Anything about racing and racing technology
RSS icon Email icon Home icon
  • Hard work pays @ 5th Lions Vredendal Gymkhana

    Posted on September 15th, 2011 Herman No comments

    5th VredendalThe weeks preceding the event was very busy, especially in the home of the two Mathee brothers, we basically spend all our time between work, the garage, bed and Selina made sure we had enough coffee to keep us going. Mike played with a combination of different gearboxes, cams, etc. in the Fox. He either had way too much time on his hands or was determined to make the Fox a more competitive vehicle, I ran out of fingers counting the past 12 evenings he spend underneath that car.

    After the Piketberg event, Mike and I decided that “Lil Datto” either needs a lot more rpm or a different differential ratio, as 1st gear was way too short for the straights and 2nd to dead. Between building my new race car “Datto LINK” I managed to source a very special ratio BMW E36 open differential. Luckily for me all the talk on the forums was correct when they stated that the E30 and E36 Medium case differentials use the same internals, this made building a custom ratio E30 Limited slip differential quite easy, poor “Datto” had to sacrifice his differential for the custom unit. Ruan and I spend time under the rear suspension of “Lil Datto” to get this new unit installed, the results was better than we expected, there is a big difference between theory and principle. “Lil Datto” was so abused at the Piketberg gymkhana that we just had to double check every single suspension bolt, gave it a good rub with polishing cream and polish, at least the little car now looks as if it is only one colour.

    A big thanks must go out to Johan Spies from Bergsig Motors 023 3412826 @ Worcester who extended an invitation to Pietie, Mike and myself to transport our vehicles to Vredendal and back, this meant we could drive thru to Vredendal without the worries of towing a vehicle and could have a nice and relaxing drive to Vredendal, the only drawback to this was the fact that everything had to be ready Wednesday evening as we had to take the Fox and Datsun to Worcester Thursday evening were they were loaded the Friday morning for their journey to Vredendal.

    Saturday morning started with the usual, 6am wake up, get everything ready for the day. On arrival at the venue we were greeted with quite a surprising fog cover, something one of the locals told us is very uncommon this time of the year, well this was not going to stop us from getting everything ready for the fun to follow later in the day. Selina and Natasha was in charged off the gazebos while the boys kept themselves busy with preparing the vehicles. The usual documentation was finished and the weapon was put to good use learning the track. The use of the bicycle really aids in getting the route faster in your head.

    Herman Mathee and Mike Mathee in Class F Datsun 1200 – 2nd in Class F and 9th Overall

    Herman and Mike Class F Datsun 1200Being on an Airfield, we were allowed to warm our tyres and drive train before a run, an opportunity I grasped with open arms as this would’ve been the first opportunity to get a feeling for the new differential with tight turns and hard acceleration. On the start line, looking at the first corner, it really looked very far and I knew we will be sitting on the limiter to the breaking point, we launched, what a surprise, it was must faster and the acceleration was much better than with the previous differential, but this was short leaved as we hit the limiter, which felt like just after the start, we went thru the 1st figure of 8 and on the entry changed to 2nd, this felt very nice as ‘Lil’ really accelerated hard to the next figure of 8, back to 1st and on the entry shifted to 2nd. Drifted the car into the slalom, once at the bottom, Mike quickly realised that I was way too busy keeping the car on the racing line, he quickly changed the car back to 1st, all I had to do was time the clutch pedal. Entering the slalom, changed to 2nd, thru it and then a hard acceleration thru the last kink to the finish. This being Vredendal and the one course that I really like to test a cars handling and my own abilities, I had a nerves lift going thru the kink. At that point I forgot about the competition and set my own goals for the day as trying to flat foot “Lil” thru the kink.

    Herman and Mike Class F Datsun 1200-1We ended the round with a 1:04.95. With the goal set, the 2nd round was all about flat footing “Lil” thru the kink, moving thru the route went as previous, only with me trying to change back to 1st coming out of the slalom, which was to slow, on our way back to the finish i almost got the feeling Mike was getting ready for the fact that his little brother is really going to tackle the kink and flat foot it, well he was quite right, I had my mind set at flying thru the kink on the limiter at 78km/h, and that was exactly what we did. Goal achieved for the weekend. Round 3 was almost exactly the same thing, how fast can we enter the kink and sit on the limiter to the end. We flow thru that thing, surprising more than one person with the superb handling and braking capabilities of “Lil Datto”. Only then I realised that the day was at an end, I must admit, Kobus Wilson was untouchable on this specific route, if only I started concentrating at driving the complete route and not only the kink, maybe just maybe I could have tried chasing him. The day ended with a 2nd in class position and 9th overall.

    I even managed to get “Lil Datto” as the photo on an article on Motorsport South Africa’s website, follow the link to the article: http://www.motorsport.co.za/News/DisplayNewsItem.aspx?niid=11105

    Mike Mathee and Pietie Erasmus in Class D VW Fox 1.4i – 1st in Class D and 5th Overall

    43D Mike Mathee and Pietie Erasmus_0

    Bjorn Venter and Jan van der Vyver in Class D VW Fox 1.4i – 2nd in Class D and 7th Overall

    3D Björn Venter and Jan van der Vyver_0

    Pietie Erasmus and Mike Mathee in Class D VW Fox 1.4i – 3rd in Class D and 10th Overall

    29D%20Pietie%20Erasmus%20and%20Mike%20Mathee_0

    Jan van der Vyver and Bjorn Venter in Class D VW Fox 1.4i – 4th in Class D and 16th Overall

    44D Jan van der Vyver and Björn Venter_0

    Ruan Reynders and Herman Mathee in Class F Datsun 1200 – 4th in Class F and 17th Overall

    54F%20Ruan%20Reynders%20and%20Herman%20Mathee_3

    Ruan Reynders and Herman Mathee in Class G Ford Focus ST– 3rd in Class G and 34th Overall

    65G%20Ruan%20Reynders%20and%20Herman%20Mathee_0

    Pietie Erasmus and Mike Mathee in Class F Mazda F1000 – 5th in Class F and 36th Overall

    20F%20Pietie%20Erasmus%20and%20Mike%20Mathee_0

    Selina Botes and Herman Mathee in Class D VW Fox 1.4i – 7th in Class D and 43rd Overall

    40D Selina Botes and Herman Mathee_0

    Thanks to all the sponsors, marshals for making this event the highlight on the calendar.

  • Slippery on Tarmac @ 10th Flamingo’s Langebaan Gymkhana

    Posted on July 28th, 2011 Herman No comments

    10th Flamingos Gymkhana 2011 RouteWork was frantic on the VW front within the camp. Power steering on the Golf and Fox was the only topic discussed, luckily for me Ruan returned back from his absent due to work commitments in Zambia, at least now I have someone to talk about building our two big project cars, but later more about that. Mike and Jan toyed with the idea of power steering on a VW Golf MK1 shell for a long time and finally decided that they had enough of trying to turn 7″ and 8″ slicks in anger, the time has come for power steering, Jan volunteered to take his motor and gearbox out to help the design process for the modifications, after allot of measurements they could start. Mike spend endless hours in front of the computer designing all the mounting brackets and hardware for the kit to work, after the positive feedback Jan provided after the 5th Fairbridge Mall Brackenfell Gymkhana where he used his newly installed power steering for the first time, Mike started with the Fox, having to make a few changes due to different donor racks, everything looked on track to have the Fox turning with ease at the Piketberg Gymkhana.

    Since Ruan’s returned the two of us tried at every possible occasion to catch up on all the car and life related discussions that we missed out on the last two years. Seeing as his car is the one that started this whole idea of racing was standing on blocks half way stripped, there was no possibility for him to use it to compete, Mike was generous enough to allow him to use “Lil Datto” to have some fun with us. Having a set of extra rims and slicks he no longer was going to use on the new and improved Escort, he had there PCD changed for use on “Lil Datto”, this however meant the two off us had some work to do to use these wheels on the “Lil”. The amount I extended the track on the car makes it difficult to use wheels with almost no offset. At the end of the day we had to cut a little more out of the front part of the fenders to get them turning to the maximum at full down travel.

    Selina unfortunately injured her back on Friday and was unable to compete, every time I got to the gazebo I could see the pure frustration on her face, sitting and watching everyone else compete was getting the better of her. A few physio sessions later and she will be able to compete at the next event.

    Herman Mathee and Mike Mathee in Class F Datsun 1200 – 2nd in Class F and 15th Overall

    23F Herman and Mike Mathee (2)_0.jpgMy track record at all the events that I participated at Flamingo’s speak for themselves, this isn’t my favourite venue and for some or other reason I just can’t do to good here, maybe it is the surface, slicks not working or just pure driver errors like hurting my arm and then driving over tyres, route errors, I don’t know. This particular route had in everything that I love in a route, fast flowing sections into slow and technical corners etc., a little bit of slow and fast sections is always nice. The route was covered with a new layer of asphalt, something we all looked forward to, as the old asphalt was prone to very high tyre wear. The first few cars onto the route posted some very good times, but from about the 5th car we started seeing the asphalt breaking up and getting the characteristics of a gravel road. As Pietie was only coming thru later on the day I had to navigate for Mike, his starting position is 10 and right from the get go, we noticed that the route had no whatsoever grip. This had me going for a while as “Lil Datto” is quite tail happy exiting a corner when stepping on the gas to much, with the gravel conditions this was either going to be a lot of fun or a huge frustration.

    The 1st round went well considering the grip levels, the time was in line with the other fast class F runners, knowing there is huge potential for improvement as the run was very conservative to get a feel for it. Ruan went out with me next to him for his first time this year and also his first time with “Lil”, I must say with a little encouragement from my side he really started driving the car as a RWD should be driven, tight lines with the rear on the border of stepping out. Standing in the line for the start, me and Mike had a discussion around keeping the lines tight to get the times lower. Pulling away and on the route everything went well with Mike keeping me in line very nicely, the rear shifting only marginally from time to time, keeping everything under control and what felt quite fast, then all of a sudden I made a mistake entering a left hander to wide and all hell broke loose when I shifted to second not realising I was off the clear line starting to form. Once the clutch pedal was completely released and my right foot totally down on the fuel pedal the rear stepped out at which was around 60km/h, Mike shouting all sorts of things at me that sounded quite strange, as he was sitting in the suicide seat it probably looked rather bad from his viewing point as we were approaching a tyre barrier on the right. Luckily I just kept my foot planted in a desperate effort to get the “Lil” under control, once this was done we over shot the braking point by at least 2m, with a combination of a poor man’s ABS braking, Mike on the handbrake we made it, a little wide but safe, the video footage was going to be interesting.

    IMG_0228_0.JPGSeeing that the route was cleaning and a racing line was forming on the gravel, times started coming down, as we posted a time 2seconds faster than the first run. We were allowed a fourth run on the day, I was lying in fourth at the end of round 3. We went out not really trying to post a even better time, just wanted to drive the car to its limits as fast as we and the route would allow; and this is exactly what happened, we posted the second fastest time for class F for the day and brought “Lil Datto” home in 2nd position for the day with Ruan marginally behind me in 3rd. I must say he really adopted quit fast to the lesser power levels of “Lil” compared to his Escort. This was the best day of racing this year, hopefully the rest of the events can also compare to this memorable event.

    Jan van der Vyver’s view:
    Jan van der Vyver and Herman Mathee in Class D VW Golf 1.4i – 1st in Class D and 10th Overall

    33D Jan van der Vyver - Herman Mathee (1)_1.jpg

    Mike Mathee and Herman Mathee in Class D VW Fox 1.4i – 2nd in Class D and 11th Overall

    IMG_0498_0.JPG

    Ruan Reynders and Herman Mathee in Class F Datsun 1200 – 3rd in Class F and 16th Overall

    43F Ruan Reynders - Herman Mathee (1)_0.jpg

    Pietie Erasmus and Mike Mathee in Class D VW Fox 1.4i – 3rd in Class D and 21st Overall

    Pietie Erasmus_0.jpg

    Rudolf Marais and Mike Mathee in Class F Mazda 616 – 6th in Class F

    14F Rudolf Marais - Mike Mathee (2)_0.jpg

  • LinkECU Engine Mangement

    Posted on March 15th, 2011 Herman 2 comments

    LinkECU G4 - SoftwareThese products is designed and build in New Zealand and locally distributed by RAW – Rezlo Auto Works
    I purchased my G4 Xtreme a month ago for the “Datto” and is blown away by the craftsmanship and quality.

    From LinkECU.com
    Link provides a range of fully programmable Engine Management Systems covering almost all applications and budgets. Whether your application requires a simple ignition or fuel management system or an advanced full-featured engine management system, Link can offer a cost effective solution.

    Datto8Feb13G4 Xtreme – Top End Engine Management
    Our most powerful engine management system ever, equals or betters any ECU on the market. Whatever the application, the G4 Xtreme’s advanced configurability enables today’s complex engines to be optimised.

    Link G4 - StormG4 Storm – Comprehensive Engine Management
    The G4 Storm delivers performance that rivals any engine management system on the market. This ECU is more than capable of running sequential injection, ignition and variable valve timing on most of today’s engines. The Storm offers all of the advanced G4 tuning features at an extremely competitive price.

    Link G4 - Plug-InG4 Plug-In – Quick Fit Engine Management
    Free yourself from the constraints of the factory ECU. Link’s G4 Plug-Ins fit discretely inside the original enclosure. Installation is a breeze, no alteration of the factory wiring loom required. An XS connector provides additional inputs and outputs such as oil pressure inputs or anti-lag / logging switches (the number available depends on the application)

    Link G4 - AtomG4 Atom – Entry Level Engine Management
    The G4 Atom is Link’s entry level ECU that blows the opposition away – half the size, all the technology!

    LinkECU G4 Xtreme
    Overview:

    Our most powerful engine management system ever, equals or betters any ECU on the market. Whatever the application, the G4 Xtreme’s advanced configurability enables today’s complex engines to be optimised.

    The G4 Xtreme offers the ultimate in engine management.

    Designed and built to be the best, the G4 Xtreme delivers the results, with more functions than normally demanded by both tuner and driver -

    eight saturated injection drives
    eight ignition outputs
    eight analog inputs
    four temperature inputs
    eight digital inputs
    eight auxiliary outputs
    two, thirty four pin, waterproof connectors
    external, 2.5 bar or 5 bar, MAP sensor (sold separately)

    Go to LinkECU for a full list of features and Specifications on the G4 Extreme.
    Download a G4 Xtreme Brochure here: G4 Xtreme Brochure