Skip to main content

Posts

HOME   |   ABOUT   |   NEWS   |   TECH ARTICLES   |   AT THE TRACK   |   REVIEWS   |   VIDEOS   |   CONTACT ME

How Limited Slip Diffs Make You Faster on Track

SADOKIST's (eSports Host) E46 BMW M3 GT3 Race Car - Kevin Doubleday © Over the years, I've found that limited slip diffs (LSD's) are some of the least appreciated performance parts you could get (or upgrade) for a car. LSD's make a big difference, though, because they can vastly improve how early you can get back on the power and, therefore, how good your corner exit is. That last bit is very important if you're driving on track and want to get a good lap. You don't have to just take my word for it, though. F1 royalty Sir Jackie Stewart puts an emphasis on the importance of corner exit. When Captain Slow was sent to him to cut 20 seconds off his lap time (Top Gear Season 8 - Episode 5), Sir Jackie told him: "the exit of the corner is FAR more important than the entry of the corner, with regards to smoothness." Sir Jackie Stewart coaching James May in a TVR Tuscan - Top Gear Season 8 Episode 5 You really need to nail the exit. And to get a

Why an Open Differential Doesn't Work on Track

C7 Corvette Grand Sport... doing a burnout with a proper diff - Graham MacNeil  © I wrote a tech post comparing various open and limited slip diffs for a comparison and I found that a lot of people were asking questions. To simplify and make it easier to read, I decide to break them up for a future tech article about handling. Make sure to stay tuned for two posts on limited slip diffs this week!. WHY DO YOU EVEN NEED A DIFFERENTIAL? A differential's job is to allow two wheels on the same axle (or two axles in a 4WD drivetrain) to spin at different speeds so a car could smoothly go around a corner. Why do the wheels need to spin at different speeds? Each wheel on a car has to travel a different path to reach the end of the turn. You can see that for yourself every time you drive on snow covered roads or muddy trails. Four different tracks by four wheels/tires on one car going around a turn - Rams Eye The Track Guy  © If you take a turn, you'll see that each whee

Ford Finally Announces HP figure for 2020 GT500

Ford has been teasing the new GT500 for months now and many details are already known about it like specs and even top speed and downforce figures . But the one thing that remained a mystery is the exact horsepower figure. We knew it was going to be over 700 hp, but exactly how much wasn't known. But we FINALLY have an answer now in the form of a video. And what more appropriate way to announce a mad 700+ horsepower figure than a burnout video? This figure puts it WELL above its primary rivals, namely the Challenger Hellcat with 707 hp and the Camaro ZL1 with 650 hp, but it is still shy of the new Hellcat Redeye with 797 hp, but it should be much lighter, to the tune of 200-300 lb. And while the Challenger Hellcat is a massively capable grand tourer for its size and weight, the GT500 should be in a different league on track, especially with the Track Pack. Getting that much horsepower makes it the most powerful production Ford ever and the most power and torque dense V

2020 G80 BMW M3 to bring more than 500 hp and AWD

The current (and outgoing) BMW M3 upset quite a few purists when it switched to turbocharging to boost power from a long line of naturally aspirated engines. It looks like the upcoming G80 M3 based on the new G20 3-series is looking to buck the tradition again by being the first ever M3 to offer AWD/4WD. That's right, it looks like the next M3 will send power to all four wheels according to a report by Auto Express. Of course, it won't be the first ever M-car to offer AWD. That honour goes to the current M5 which was the first M sedan/saloon car, so perhaps that should have been a sign of things to come. It makes a lot of sense, given the competition. Fast Audi have been AWD for several generations and recently, AMG announced that the future of AMG is four-wheel drive. Tough Competition Audi is nearly synonymous with AWD and with AMG now switching to AWD, a RWD M3 would (unfortunately) be quite handicapped in terms of traction and objective performance. Competition

The $1.4 Million Porsche 911 That You've Probably Never Heard Of

I'm sure there are some out there who would think that messing with the iconic 911 shape is blasphemy. But for the rest of us, this 911 may just be the prettiest 911 ever made. The reason you probably have never heard of it is because only one was ever made and it was built over 50 years ago. Back in the early 911 days (i.e. 1960's-1970's), Porsche didn't make a 911 Cabriolet. The engineers in Stuttgart didn't think they could design a convertible version (or perhaps feasibly build one) that would meet the American National Highway Traffic Safety Administration (NHTSA) rollover safety regulations, which is part of the reason the 911 Targa exists. Since the American market was quite important to Porsche as far as sales and profitability of the 911, a convertible wasn't built back then. It wasn't until 1981 that Porsche showed the world a concept 911 Cabriolet at the Frankfurt Motor Show and a production version didn't come out until late 1982 as

This Lanzante Porsche 930 is powered by a GP-winning F1 Engine

Whenever I hear of an outlandish 911 build, I always wonder what hardcore 911 would think. In my experience, they tend to love tradition and preserving the 911 legacy. This car breaks two of the holy trinity of classic 911's; rear engined, flat-six, and air-cooled. It is still rear engined but it uses a V6, water-cooled engine. But I can't imagine a single 911 fan being upset about this. You see, this isn't just any water-cooled V6 engine. It is a Formula 1 twin-turbocharged 1.5 litre V6 out of a McLaren MP4/3 F1 car. Further preserving the Porsche-ness of this build, the engine was built by a partnership formed between Porsche and TAG to provide engines for McLaren F1 team. Porsche was responsible for the technical burden of design and engineering and TAG financed the effort and stuck its name on the engine as "TAG turbo" since McLaren didn't want Porsche's name on their F1 car. Lanzante first revealed the car in October last year shortly after the






Does An Aftermarket Grille Really Increase Airflow?
I put a Saleen S281 grille to the test to answer that question.

Stock Suspension S197 Mustang With Square 305/30/19's
What you need to fit a proper size square tire setup.

How Limited Slip Diffs Make You Faster on Track
What you need to know about how they put power down and pros and cons.

Can Telemetry Explain Schumacher's Talent?
A comparison between Schumacher's and then team mate Herbert's data.






Cayman GT4 Track Review
The first Cayman with proper (911-challenging) power.

Is an EcoBoost Mustang any good on Track?
Two days at the track in a Mustang short 4 cylinders.

2016 BMW M4 DCT Track Review
It's quick (properly quick). But is it fun?

Can a stock Golf Diesel handle a Track Day?
Not your every day track beater.




🔥 Most Visited This Week

2004 Audi TT 3.2 Quattro DSG Track Review

Before getting into this, I have to confess something... I had never driven an Audi TT before. Not until this one, anyway. But that hasn't stopped me from forming an opinion about it from the comforts of my own couch while reading and watching reviews online. After all, if you've never done that, do you even know what the point of the internet is? Now, we all interpret reviews differently. Call it confirmation bias if you will, but if you like a car, you'll read a review and look at the positives as what makes the car great and the negatives are but a few quibbles you have to live with. If you don't like a car, the positives are a few things the manufacturer got right while screwing up everything else. It's a bit harsh to put the TT in the latter category, but that's where it ended up for me... I never took the TT seriously. The problem with the TT for me isn't that it's a Golf underneath, per se. There is nothing wrong with a performance car sharing a

Falken Azenis RT615k+ Street and Track Review

Last year, I picked up a 2009 Lancer Ralliart to do a long term test with it as a dual duty track/daily. One of the first things I knew I was going to do was put a decent set of tires on it. The car came without OEM wheels which was actually good because I didn't have to hesitate about getting a good set of aftermarket wheels to support going wider. Thankfully, my friends at YST Auto Halifax  set me up with a great set of Superspeed RF03RR wheels. The Wheels I had never even heard of Superspeed but I trusted the good folk at YST Auto who mentioned some customer cars running on track with them. These wheels are rotary forged which is basically a prerequisite to be taken seriously in this market populated by companies like TSW and Fast Wheels. The wheels looked like a high quality, well finished wheel and each had a "QC" check sticker on. Just for appearances? Maybe, but I found no defects. The wheels seemed easy to balance (didn't need many weights) and at 18.1 lb. f

GTR vs Evo X vs STI: which has the best AWD system?

A few weeks ago, I made a post explaining  mainstream AWD system types and how they compare , pros and cons, etc. including some simple diagrams to show where the power goes and how much. As promised, this post will focus on specific cars and what AWD systems they use, especially ones that that have more or less been defined by their AWD systems, and the best place to start may be with a bombshell; the Nissan GT-R. Nissan GT-R (R35) The GT-R has built a reputation around having monster traction and very approachable performance, thanks to its AWD system - Advanced Total Traction Engineering System for All-Terrain (ATTESA) - and what it can do for you. But the GT-R doesn't actually use the most mechanically sophisticated type of AWD systems discussed in the previous article, namely a "true" AWD with a centre differential. Instead, it uses a clutch pack to transfer power. RWD-based clutch-type AWD schematic - Rams Eye The Track Guy © The R32, R33, and R34 Sky

Limited Slip Differential Types Compared

BMW M2 equipped with an eLSD - BMW © A few weeks ago, I posted about traditional clutch-type limited slip diffs (LSD's) and how they work. You can read about those in the previous post: How Limited Slip Diffs Make You Faster on Track . But as you might know or have learned from reading the article, they aren't without their faults, which means engineers are always working to get around those limitations. You may not be surprised to learn that something like the Ferrari 488 GTB doesn't use a traditional limited slip diff, but it's not limited to super cars, far from it. Cars like the Golf GTI, the Civic Type R, various Mustangs, Corvettes, and BMW M cars, and even the Lexus RC F and GS F, all avoid a traditional limited slip diff in favour of one of these technologies. To keep things simple, I'll focus on two wheel drive vehicles. The vast (vast) majority of principles apply to all and 4 wheel drive vehicles, but there are some subtle differences that I'll