Showing posts with label HRE Wheels. Show all posts
Showing posts with label HRE Wheels. Show all posts

Tuesday, November 17, 2015

Drakan Cars East - Our Partners on the East Coast!

Developing, building, selling and servicing a car takes a real team of like-minded people/companies.  Much like Palatov Motorsports, Drakan Cars East (DCE) is another key partner for us with the Drakan Spyder.  Bill Thomas and Kurt Nehlig are partners in this venture and support the NorthEast region for us.  Not only will they sell and service the Drakans, they are fully capable of installing the powertrains.  DCE have proven to be more than just a dealer and have helped to make the Drakan more complete.  I've worked with Bill for nearly ten years on Lotus and knew that they would become a great asset for us.
powertrain installation at DCE
A key feature of the Drakan is that it is available as a Rolling Chassis without an engine or trans.  The engine that we recommend is the eRod LS3 from GM Performance Parts.  This is a 50 state emissions compliant engine that is availalble from your local GM dealer.  Clients can select this engine or other LS variants that may suit their needs/desires.  The transaxle choices are various Getrag gearboxes but others are available as well.  In fact sequential solutions have been run on the Palatov D2 and will be tested on our car as well.  DCE have full capability to conduct powertrain installations.






DCE took delivery of their Drakan Spyder as a Rolling Chassis for their client, Adrian.  This was the second Drakan that has been built.  They completed the full powertrain installation at their facility.  Their extensive experience with boutique cars helped us finish some incomplete features (windshield wiper).  Additionally they also suggested improvements like a rubber cap that finishes off the rear of the headlight housing (see below).  I attended their Drakan unveiling and was pleased at how well they had finished the car.  These improvements will be incorporated into all future cars.
See rubber cap on backside of headlight housing - a DCE innovation!
DCE & Adrian went to the track to put it through its paces.  The Drakan is a powerful car but the handling is predictable as the car communicates clearly.  The guys had some fun playing around with the suspension to tune it to their liking.  They have also been testing out a new paint protection coating that is working well on high impingement areas - which is an important consideration on an open wheel car with sticky tires.  They have had the car out for 2 or 3 track days so far and have been suitably impressed.  Needless to say, they can't wait for their track season next Spring!

Bill and Adrian making tweaks to the Triple Adj Fox Racing Shocks
Power to spare!
  DCE are a great partner for us and I'm confident that our collective clients will be well served by them.  

Sunday, July 26, 2015

Drakan Spyder (Project Dragon) Update #13: Street Testing

Dave and Joe heading out
 We are long overdue with an update, sorry as we have been overly busy!  We helped finish assembling the first production Drakan up at Palatov.  Joe and I have made Portland our second hometown with the ramp up of this car.  Luckily Portland is a cool town to visit - shame we are usually too busy working!  Since the car arrived to our shop in Temecula, several items were finished including side view mirrors, lights, venting, exhaust testing, suspension tuning and heat management.  We'll cover some of these in this blog.


Dave working on his tan
Dave is a happy engineer
David Thilenius came out to run the car along a street test loop that he had used while doing Ride & Handling work at Hyundai.  Dave now has his own consulting company, you can visit his website: Thilenius Group.  

This test loop is a great place to tune ride quality as it has many different conditions and road surfaces that challenge a car.  Most people believe that CA roads are smooth - in fact they can be very rough.  They can be pretty unforgiving to many cars that were not tuned for these conditions.  Dave and Joe drove together with some tools in hand and made adjustments to the Fox Racing shocks and even a slight tweak to front toe.  Street testing is done at civil speeds and lots of boring steady-state speeds.  This allows Dave to really feel what is going on with the car.  After several hours, they landed on settings that I would then get to try out. 

Some of Dave's comments about the car included that the car was not as 'buzzy' on the road as he thought it might be.  The LS3 is not hard mounted to this chassis so the car remains smooth.  He also commented about how flat the car handled as it sways very minimally with almost no perceived squat or dive.  The suspension compliance is really remarkable and makes the car very comfortable.  It does not have the stiffness you might expect in a car that is designed to be so elemental and pure.  We think this along with the flat cornering will be very much appreciated by our clients.

Naturally I needed to test out Dave's work.  So I decided to drive the car up one of my favorite mountain roads: Mt.Palomar.  This road is frequented by sport bikers and has plenty of tight turns and elevation change.  You may recall the humorous video we made years ago at Palomar.


Gas cap is in the center!
I drove the Drakan down the 15 freeway and was immediately happy with the ride quality.  The car is quiet and smooth at freeway speeds and holding a conversation with a passenger is easy.  I exited at 76 and went east to Mt.Palomar.  I filled her up at Pala and enjoyed the fact that I can park the car on either side of the pump thanks to the center mounted gas cap.

The car ran through the bumpy roads comfortably.  The suspension simply soaked up the irregularities.  This car is a torque monster and I was able to go up the 'slow' side in 3rd gear.  It had enough power to pull the car from each corner exit without necessitating a downshift.  The grip levels were very high and fully confidence inspiring.  The rear of the car could be convinced to come out under power but only if you provoke it.  Steering effort builds as the wheel is turned and provides excellent feedback.  The steering needs some effort but is so direct that you feel truly connected to the road.  We had requested that this effort get reduced and Palatov responded with a geometry change that works nicely on the road as well as track.

Dave's tuning really made for a compliant ride.  Dare I say it may be the most comfortable sports car in our stable?  This is a testament to Dave's tuning but also the basic suspension design by Palatov.  The Fox shock dampening and soft spring rates were selected by us from our track testing and I think they really work well on the street.  This chassis is essentially the same raced by Palatov this year at Pikes Peak - they took the win in the Open class.  The Palatov D2RS runs heavier springs but is basically the same chassis as our Drakan.


Sportbikers love light sports cars!
Of course, not everything went as smoothly as the ride.  We had chosen a new high temp shifter cable housing to test on the car.  The manufacturer felt it may be a better solution for us.  We had been running a good cable from them on our test mule but also used an additional insulation sheath and had great track performance.  These cables are the same construction as the ones we spec on our Lotus TRANScables.  We thought the new cables without insulation might suffice.  We were wrong.  The cables began to freeze up when I was at the top of the mountain.  So I drove home with a few less gears than normal.  We'll swap back to standard cables + insulation to insure this does not happen again.  

Other niggles that I noted included side view mirrors that vibrate a bit, the lack of a dead pedal and the need for grip tape on the clutch pedal.  The side view mirrors will soon get thicker metal on the base plate and should help stabilize the mirrors.  A dead pedal is in the works and adding grip tape is simple enough.


What's with the different spoke count on those HREs?
Overall we are happy with the car and have some additional tweaks to make to it.  Many of our clients are asking for wings.  We'll get to that later this year.  The cornering speeds of this car are already so high that we think most of our clients will be happy enough.  Slicks and wings are in our plans - but first we need to catch our breath from getting this car fine tuned...

Thursday, April 23, 2015

Project Dragon (Drakan Spyder) Update #12: More Track Testing &Improvements

We are working hard with the Drakan and a few weeks behind on our updates.  We been back to the track earlier in April for additional testing and up to Palatov/Lancair for body fitment two weeks ago.  We go back again next week to begin building the first official production car.  Keep reading to learn the latest...

More Track Testing

Joe and Dave went out to Spring Mountain once again to verify some changes that were made to the car. We had to test our new oil pan baffle, front suspension arms, and HRE wheels. 

Our previous test on SMMR's East Course 2.1 showed oil pressure dropping to 11 psi when the car was subjected to two quick successive left hand turns under hard braking. This drop in oil pressure was unacceptable to us - Dave is a pro and is driving the car hard so we know this is an extreme case. In all of our previous testing with Dave, oil pressure data was acceptable.  In fact we posted about our good performance on this blog entry.  Clearly this specific combination of left hand turns was too much for the stock pan to handle.  We got in contact with Improved Racing and had them send us an oil pan baffle and crank scraper kit. With the new baffle installed, our lowest oil pressure in the same corner was 24 psi. The Improved Racing baffle will now be standard on all Drakan Spyders with a Dailey Engineering dry sump offered as a future option.


We had a few handling related tweaks to try out as well; a new set of front wishbones and our new HRE wheels. The steering was a bit heavy on our test mule - even compared to similar cars with no power steering. Palatov redesigned the new front wishbones with different geometry that has less caster built in. These new arms are a drastic difference, the steering is now much lighter, and this should contribute to less driver fatigue both on the street and track.  Dave appreciated the reduced effort at the end of the test day!

The new HRE wheels were also slightly different. The front wheels have a bit more offset and the rears are 0.5" wider than what we were running in previous tests. Dave was pleased with the new wheels, he said the wider front track provided more grip. Admittedly, some of this improvement may have been due to fresh rubber, but the wheels definitely did not hurt the handling. 

Ultimately we turned 1:28s time on this circuit.  This compares favorably with a new Lotus V6 Cup R that is running slicks and a sequential.  This car is turning 1:27s at the hand of our good friend & Lotus Cup champ, Jack.  With slicks, we're sure we can shave a second or two off of our time.

Other updates

The new switch panel is in and operational. The backlighting looks awesome and the switch location and action is spot on. The ignition switch is locking so you can't accidentally shut off the car.  The horn and turn signals can be actuated without removing your hand from the wheel and all the rest of the switches are well within reach. The left hand panel which is home to our master kill switch and brake bias knob turned out well also.


The switch paneling is nice but the new dash from AiM has certainly stolen the show.  We posted a quick video on our Instagram page: HERE.  The MXS is now in production and it is a bolt in swap from our old MXL2. Functionally, it is almost exactly the same; visually, it is in another league. The MXS features a beautiful TFT display that not only looks gorgeous but offers more flexibility for different page displays. There is a street page with a conventional style dial tachometer, a race page with a sweeping tach, and a test page that can display 11 different parameters at once.  We are really pleased with this kit.  The Drakan will will be ready for AiM video so owners will be able to add any of AiM's cameras easily.

The other notable upgrade since our last post are the new rotors. We decided to up the braking performance of the Drakan with some 12.88" rotors from Girodisc, the same people who make our ULTRAdisc rotors for the Elise/Exige, Evora, and soon Alfa Romeo 4C (testing now). These disks are high quality, well proven pieces that add to the performance and reliability of the Drakan. Another plus of our rotor setup is that they are the same front to rear, this ultimately means that replacement rotors are going to be less expensive.  We are thinking about you guys who keep spares and are properly prepared...8^)