Track - TWS

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Sunday, October 21, 2007  

 Evo X for track use: 5-speed or SST 6-speed?
 

One of the biggest topics of discussion about the new Evo X is the question of which transmission to get. Setting aside the fiunancial aspect, the most important question is what will the owner do with the car? In my case, if I were to get one, it's be used for open track events.

But here's the challenge with this (or older) Evos. On my particular track (shown below), a mid-pack performance car should be hitting ~145 MPH at the end of the straight... and then continue accelerating while coming off the high-degree banking and turning down & left into the inner track. You use the straight to pass the slower cars... and while you are looking for an edge over the faster cars - many of which can do 160-175 there - it would take a heckuva lot of extra HP to get this "aero brick" of a sedan up to that kind of speed. So you won't have an edge here over those faster cars, but you absolutely cannot afford to fall very far behind. You have to keep up your cadence so that so that you can look to play your AWD and torque-vectoring advantage in the numerous tight turns in the inside portion of the course.

Now here's the problem in stock 5-speed Evos on this main straight. You'll start to notice this part way down the straight (and it's even worse when running the track in reverse direction, because of the layout, when entering the straight). I have seen this many times in earlier Evos when driving flat-out (and well)... I believe it will be the same problem in the 5-speed Evo X and have the drive-time experience and numbers to prove it. Although I may not be explaining it well here... normally I'd have a large map of the track and chalk-talk it.

  • Shift into 5th - RPM drops big time (economy gear).
  • Get up to 100-115 in 5th - engine starts dialing back boost. Worse.

*Stock* Evo VIII/IX 5-speed:

The acceleration *noticeably* drops off in this situation. 4th gear doesn't leave enough RPM to get to the necessary speed so you are stuck with 5th gear and a very seriously reduced rate of acceleration. In fact, in the reverse direction you notice this as you enter the main straight! Shifting into 5th very quickly turns into a slow crawl to HP peak in 5th - but the problem is you won't get there given the length of the straight because the acceleration will be so slow.

Overall gearing isn't radically different in the Evo X 5-speed. In 4th it will only do 93 at HP peak... shift into 5th and it could do 134 at HP peak. Except - again - you'll never get there because you are out of straight.

This is one way the Evo VIII/IX and X 5-speeds are all much the same car with the same issue for high speed work.

Keep in mind that at this high speed drag is a problem so you are starting to have to work harder anyway. Making it even worse, any shifting costs serious acceleration time, too. Going 4th to 5th is very noticeable. You can count the seconds you've just added to your lap time.

Evo X

What I've left out so far is the RPM you'd be at while coming thru a pair of 90-degrees turns with just before the main straight. The SST is better geared overall here as well, so the RPM thru these twisties would be higher in 3rd and then and I'd get to and thru 4th gear earlier on the main straight rather than later. And therefore on to a higher top speed.

With the SST, we'd shift at 6500 RPM in 5th (@ 117 MPH - my guess is about 1/3rd of the way down the length of the straight) into 6th gear and then we'd only have to get to 6000 RPM for 140 MPH (and we'd have had have more room on the straight to do so). And you will pass that many more people by being able to show that kind of over-taking speed. Over-taking speed is what counts here.

Because of the extra gear, there is an extra shift. However, the shifting is extra-human fast, and the revs are perfectly matched so the boost will return that much faster as well. Given the better gearing of the SST for this work, the car will be in a better RPM range to continue boost. While it will also (like the old Evos) start to drop off of max boost at high RPM, at least the RPM is in the right place here to keep closer to the HP peak.

I'm sitting here contemplating drawing a track map of likely shift points for this car, compared to some of my other cars. I'm out of time to go this far, but clearly the 6-speed is far better geared for these particular circumstances (as it would have been w/ the previous 6-speed).

Notice again I said clearly *stock*. Mods can help make up for this, there are mods to keep the boost up to max RPM, but the gearing problem is inherent.

Looking at the Evo X, here's the speed-in-gear for each tranny:


Here's the course... with the normal direction indicated (I should be using a GPS chart but I don;t have one here). The parts I'm talking about above are between the two red dots, and the direction is indicated with an arrow. This graphic (from the track site) isn't very good... the first two turns (starting with the left red dot) are actually more or less 90 degrees, first a left and then an immediate right - although it doesn't look at all like that angle on this lousy graphic. After those, you need to accelerate as much as possible and with the SST you will be well into 4th when you come out onto on the main straight (the "straight" is also straighter than it appears here, and it's well banked).

By the end of the straight, I want an X to be doing ~145. Due solely to the gearing, it's not possible in a stock 5-speed Evo. At the end of the straight (Turn 1) you turn towards the left, go thru the transition from the banking to the flat inside section of the track while continuing to accelerate just a bit, then brake for all you have. You need to brake down to about ~80 for the left-hand Turn 2 (just past the right-most red dot). This is where the 2-piece rotors will be invaluable, as well as aftermarket pads. The in Turn 2, the torque-vectoring rear diff will really come into play.

Back to the question of time lost while shifting. Here's a video from the Evo X press introduction in Japan, showing an Evo IX manual and an Evo X SST side-by-side:

This is exactly what I'm talking about time lost while manually shifting. The video also demonstrates the superiority of AWC in both the wet and dry.

Finally, a couple of additional facts. Remember that the X is only 100 pounds heavier than the previous car. The SST tranny is 49 pounds heavier than the 5-speed, and the engine is 27 pounds lighter than the old iron-block engine. This is an extraordinary achievement on the part of Mitsubishi; newly designed cars are gaining rate at a tremendous rate. The X meets far more advanced crash regulations than the prior car and it will be crash rated considerably better. Even more important to us, structurally it's light years better than ye olde VII-IX. The old one was good structurally, this one is much better, and that's another one of those inherent things that you can't really make up with band-aids.

So for this particular track (and even faster ones like Watkins Glen), in an X, it's a 6-speed SST or nothing. Even if it might require an add-on tranny cooler (pump and cooler will probably cost $1500) - which would be a good choice eventually, anyway.


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Saturday, May 19, 2007  

 My SHO never did the Nurburgring :-(
 

But this one did, and thanks to very creative use of a custom editor for Gran Turismo 4 (courtesy of HunterVF via YouTube) we get to find out what it would be like.

This is a really nice peice of work. If you want to quibble on the details... the V-8 SHO wouldn't actually sound like this unless you spun it up to 9000 RPM (and hopefully the cams are welded!), and of course the tranny that is envisioned here is about 10,000% better than the terrible production 4-speed auto. So I like it!

Production SHOs are rarely seen on tracks. My '97 SHO did do Texas World Speedway - just once. My new '99 Cobra hadn't been delivered by Ford to my dealer yet (it was the first one in Central Texas, and we believe the entire state - and Ford delayed production for several months while some - but not all - of the bugs were worked out). So my daily driver SHO was all there was to drive (it's lease would run out a month later), and when I had the opportunity (I was an instructor in the LSRPCA Porsche club before they got too snotty to put up with) I took a few laps.

Clearly the SHO wasn't the worlds greatest track car, but it did stay unruffled. 

What's the ultimate SHO? About ten years ago, I was lucky to have several laps as a passenger at Bondurant in their early V-6 SHO instructor car. With a opened-up engine, unrestricted exhaust, a Quaife limited slip diff, a fuel cell, and of course a great driver - the difference was astounding and the tremendous flexibility inherent in the SHO V-6 really came out. I wonder whatever happened to those cars... and I wonder what it would be like having one now for fun. It'd be easy to duplicate it. Anybody out there have a limited slip diff in their Gen 1/2 SHO?

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Sunday, April 08, 2007  

 What ever became of your old cars?
 

Have you ever wondered what ever became of your old cars? Did the kid who bought it wreck it? Did the old lady who bought it drive it only on Sundays? Did the new owners ever find out about the all the mods you did - and then removed?

A good way to find out is with CARFAX. Membership is inexpensive http://www.carfax.com, and the results are detailed. Using the VIN numbers, I recently looked up several of the cars I've owned during the past 20 years.

My '94 Cobra:


This one is the exception to the usual rule. I traded it in to a dealer on a '96 Cobra. The dealer whole-saled it to another Ford dealer, who sold it to a person who later became a friend. I was sitting in my office at IBM one day when the phone rang and a person asked "are you the person who used to own a '94 Cobra?". I figured it had blown up and was hesitating to to answer... until he said it was fine and wanted to know some of the dertails about the car. Things naturally went in the direction of track events (as they do in any conversation with me), and a month later he was at his first event at Texas World Speedway, and shortly afterwards was doing mid-130s thru turn one! Later, when a twin-turpo Supra enticed him (as they do with everybody), he sold it to a friend of his who also took up the same events, and is still doing them to this day. That person also became a friend.

The '94 Cobra was the most successful track car I've ever owned. I put 22,000 very hard miles on it, and it only had a very few issues (loss of a MAF, front control arm bushings). Currenlty, it had over 80k miles on it and it is still running strong, although there have been a few T-5 transmission issues (all solved). With Ford motorsport headers, an exhaust system, a larger MAF, a complete suspension replacement (the V-6 based SVT suspension was terrible when stock) including a much-needed panhard bar, and a set of racing seats, the car is dependable and predictable. It isn't particularly fast (the market for performance cars has moved well beyond what a pushrod 5 liter V-8 can compete against) but it is dead reliable. I drove it about 4 years ago and fondly remembered it's predictablility and dependability.

CARFAX - shows the change of registrations from me to the 2 other owners in succession. No issues shown.

My '97 SHO:

My '97 SHO was a lease, serving the purpose of daily driver when I was in Redmond with Microsoft. I had it about a month when I came back to Austin before I had to turn it in (coinciding with the arrival of my '99 Cobra) and in that time I took it out on the track at Texas World Speedway just to confirm my high-speed impressions of it. It was flawless there, although of course not particularly fast.

When I turned it in, it was in perfect condition. It did have one distinctive mark on it from a scrape on a peice of cement in a parking lot, under the front left bumper.

After I turned it in, I spotted the car up the road in Elgin TX in front of the City Cafe. It was clearly my car, as evdenced by the same mark under the bumper. Soon after I saw the car several times again and came to the conclusion that the new owner lived somewhere near my house. I even saw it at the neighborhood 7-11 and almost stopped to talk. No point in that, though.

CARFAX - unbelievable: the new owner kept it to the 122,000 mile mark and has moved to San Antonio. A year ago, the car was sold at dealer auction and hasn't been re-registered since. I'm disapointed at that, but not surprised. The SHO engine had it's reliability problems and I'm surprised it lasted this long. RIP, SHO.

My '99 Cobra:

 

The '99 Cobra was my first big build-up after my return to Texas from Redmond WA. The increased power and the new independent rear suspension made this car work very well. Modifications (see link above) mad eit work even better.

I kept the '99 for two years, then sold it to a friend who in turn turn sold it almost immediately when it didn't work out as a track car for him.

CARFAX - the '99 is in it's 4th owner, but still in Texas. As of last Fall, it has 59k miles on it. At one point in 2004, it was sold thru a dealer to it's current owner outside of Houston. I do wonder if it stil has it's Recaro seats and the othe rmods I made to it.

==============

Several years ago, I looked up some of my more infamous cars on CARFAX.

  • The hated 1983 Mustang GT ended up wrecked at the same dealer I traded it into for my Mustang SVO. That's a fitting end for a car that was an absolute piece of junk.
  • My '96 Cobra, complete with Yellow KONI DAs, was still in the state of Washington - but is in it's 3rd owner. The 2nd owner, no doubt had to spend all of their money on back surgery due to the KONIs and the thousand-pound front springs. That was one great car on the track, but a bone-crusher on public roads. All-around, you couldn't live with it.

==============

So CARFAX will give you the mileage at major milestones such as registration renewal, major dealer service, or austion sale. It will also indicate whether the car has been crashed and received major body damage. Flood, fire, and lemon buybacks are also indicated. Junk and salvage tieles are also shown. An estimate of yearly mileage is computed. Any potential odometer rollback is indicated.

That's the extent of the information CARFAX can provide... if you want to know more you could take the VIN to a dealer and ask them to run a service history on the car. They won't of course tell you the name of the current owner, bvut you could see what kind of servicing and parts replacement it's had.

==============

But there is more to this research going on in my mind... like most of the cars I've had, these three were originally love/hate relationships. I drove them ruthlessly on the track, or left them carelessly in whatever open parking spot could be found. They had a single purpose to me and I drove them to within an inch of their lives in achieving that purpose. The Mustangs were driven at 10/10ths for most of their lives. The SHO was left in any open spot that could be found on the Microsofct campus - that was after all it's purpose - and it was even driven near flat-out on dirt roads in the Olympic National Forest in Washington State while spectating at a SCCA Pro Rally. It ended up stuck in a ditch, but it served the purpose of getting me to some great spectating locations.

When I was done with these cars, I left them behind, very rarely giving them a second thought. I was already on to the next one at that point, ruthlessly driving yet another car to 10/10ths of it's life while plotting another round of mods or planning it's disposal for yet another track car. 

And after many years of this I've come to one conclusion: that this is the problem with this hobby. It's very difficult to "love them as they are". You lust after them until you finally own them, and then inevitably find there is always something dead wrong or something that needs major (and expensive) improvement. Finally in the end you hate them and move on to something else. After several of these, you realize you never even liked them for what they were.

There are very few of them you look back fondly at - and never until years later when you have exhausted the hobby and then find new dimensions to it such as restoring old cars. For example, I'd love to find and restore an original 240Z - even though the car would be useless as a track car, is dead slow by modern standards, and has the chassis integrity of a wet noddle, there is something timeless in it's appeal. Even thirty-seven laters later, it's got stunning looks. This is a car that could be a keeper, one that I'd preserve, protect, and even cherish.  And if there are some fellow hobbyists who also see the value of certain classic cars like I do, then chances are they've also exhausted the love/hate beat/abuse track hobby.

Next month will be the 27th anniversary of track events for me. My first event was, I believe, in May of 1980 at a Corvette Club of Cleveland event at Nelson Ledges. The car was a '79 Indy Pace Car Mustang, and it had it's faults. Nevertheless, I ditched the car for an '83 Mustang GT which turned out to be an absolute piece of junk and was a major mistake. That was the beginning of my love/hate phase of track events - and particularly of Fords for track events.

If I've found love since then, and perhaps even reformed (recovered?), it's with the S2000. It's not the fastest thing around the track (although it is within the top 15%), but it is the most fun and the most visceral car I've ever driven (and as an instructor I've driven nearly everything made in the past ~20 years). It's a car you like from the first drive and to the last. It's taught me far more about driving than any of the Mustangs ever did. Instead of relying on brute (and unreliable) power, it relies on finesse. Instead of the loosing power while trying to figure out how to get the power down to the ground you are challenged to keep the engine in it's power band (a stratospheric 6-9k RPM), really leverage the full abilities of the independent rear suspension, and focus the razor-sharp steering on finding and keeping the perfect line. All of this makes for a car that will run circles around most others, while constantly and repeatedly endearing itself to you. I have no doubt I'll someday be restoring one of these for concours events, while at the same time explaining to folks what I've done with them over the years - both on track and on back-roads driving (something no Mustang ever had any capabilities for). And that's what true love is all about - a lifetime of stories, perhaps even love lost - but above all having and remembering good times without excuse or regret.


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