HPR Top Speed? [Archive] - RMSolo Discussion Forums

Maxx schlick

03-09-2009, 04:10 PM

For those of you who have been using Paul's new Driving Simulator for High Plains Raceway. How fast does it look like the top speed sections are going to be?
Will we be going faster than at the longest straight away at Pueblo? :D

Unfortunantly none of my computers are up to the task of running the sim.

Does anyone in or near C. Springs have a setup that is up and running the sim? I would love to check it out.
I could bring my Logitech G25 Pedal/Wheel/. It has the clutch pedal and the gated six speed shifter.

gordon0412

03-09-2009, 04:44 PM

Keith I'm sure someone will answer this better than I, but I seem to recall seeing a sim where the car (a Z06) hit something around 150 on the longest straight. We'll see how bad my memory is, but I do recall we'll definitely be going faster than at the end of the front straight at PMI.

Can't wait for April!

jhadler

03-09-2009, 07:14 PM

Since Arie Luyendyk hit 140 on the back straight on a cold day, on a green and dirty track, in a car with shot DOT R tires (Z06), I'd say 150 is definitely a reality in higher powered cars.

-Josh2

usakubko

03-09-2009, 09:54 PM

And I'll let you know what the slowest speed up the straight away is :p

GingerGSR

03-09-2009, 10:13 PM

Since Arie Luyendyk hit 140 on the back straight on a cold day, on a green and dirty track, in a car with shot DOT R tires (Z06), I'd say 150 is definitely a reality in higher powered cars.

-Josh2

Did you factor in the 60 MHP headwinds and the drag coefficient of a giant tumbleweed imbedded into the front end? :eek:

jhadler

03-09-2009, 10:26 PM

Did you factor in the 60 MHP headwinds and the drag coefficient of a giant tumbleweed imbedded into the front end? :eek:

Why? That's standard fare fer racin' on the high plains! :D

-Josh2

LoCore

03-09-2009, 11:23 PM

So Josh, you're OK with 150+ mph Corvettes in CTT? Without safety gear?

L-ucky-S-ix

03-10-2009, 12:01 AM

If I can have articulate conversations with someone in my passenger seat at 150-mph I would think that the driver knows about the safety.... or is just eluding to the safety factors involved with impacts at around that speed.:cool: We will finally see what speeds are capable on the fast parts of this track, and I find them reasonably verifiable when the plethora of Corvette's decide to run this course as it seems that these Chevy's will be a benchmark for any track depending on what "bolt-ons' they have added since their times volunteer the most mind-bending times that can be attained by a street car with attainable power and moneis. Not to mention that there are quite a few 'Vette's that are modded to an extremely fast classifacation to where the times that they achieve are moderately acceptable.

Just wait for the CSR's and the DSR's to pave the way for fast times.

John Scheier

03-10-2009, 06:55 AM

So Josh, you're OK with 150+ mph Corvettes in CTT? Without safety gear?

... watching for a response....

Maxx schlick

03-10-2009, 08:14 AM

So Josh, you're OK with 150+ mph Corvettes in CTT? Without safety gear?

Waddya mean no safety gear...I got saftey gear...
http://i116.photobucket.com/albums/o14/maxxschlick/File0010.jpg

Note the left handed "support".

delirium45

03-10-2009, 08:33 AM

Waddya mean no safety gear...I got saftey gear...
http://i116.photobucket.com/albums/o14/maxxschlick/File0010.jpg

Note the left handed "support".

Keith that is known as a 5-point harness :D

Built-By-Bones

03-10-2009, 11:12 AM

PaulL

03-10-2009, 11:22 AM

Keith, don't you hit 140-150 at Pueblo anyway?

Top speeds at HPR will be fairly similar to PMP.

jhadler

03-10-2009, 11:36 AM

As Grant already mentioned, it's probably not going to be a dramatic change in top speeds compared with PMP. But the track configuration is different, and that will weigh on how we approach it.

-Josh2

Maxx schlick

03-10-2009, 12:11 PM

Keith, don't you hit 140-150 at Pueblo anyway?

Top speeds at HPR will be fairly similar to PMP.

The top speed I have hit at Pueblo was 142mph. That was with my car 100% stock and with street tires.

I now have upgraded the brake ducts/pads/rotors and lines , installed a roll bar, race seat and a set of six point harnesses.

Maxx schlick

03-10-2009, 12:30 PM

having been in both the left and right seats of one of our driver's Vette's at Pueblo, and seen north of 145mph, I see no issue with that speed at HPR.

I am worried about the closing speed between a car of that capability and say Kubo's Xentra. I welcome any suggestions.

Personal responsibility is a definite requirement for participating in CTT this season.

I suggest Kubo watch his mirrors, hold his line, and hang on to his doors.

I will do the same since I aslo plan on running my HS BMW318is (zero to 60 in 26 seconds) a few times this season, and me and Kubo will be running neck and neck at the back of the pack. I might just weld the doors closed so nobody blows em off.

gordon0412

03-10-2009, 12:41 PM

The top speed I have hit at Pueblo was 142mph. That was with my car 100% stock and with street tires.

I now have upgraded the brake ducts/pads/rotors and lines , installed a roll bar, race seat and a set of six point harnesses.

Ah the joys of 100 more HP! 130 is all I've managed. Of course your probably entering the straight carrying more speed because your driving better, and then have 100 more horses to push you down that straight. Plus I always brake too early for 1 at PMI. I did get to hear Grant laughing though as the car blasted through his Mini's top speed in 4th gear :D

BlueVelocity

03-10-2009, 07:32 PM

150? LOL

Jake, your thoughts?:D

Erron S.

usakubko

03-11-2009, 12:04 PM

I suggest Kubo watch his mirrors, hold his line, and hang on to his doors.

I will do the same since I aslo plan on running my HS BMW318is (zero to 60 in 26 seconds) a few times this season, and me and Kubo will be running neck and neck at the back of the pack. I might just weld the doors closed so nobody blows em off.
I'm bringing a pillow for the straight aways. And the more stuff you can "blow off" my car, the faster it should go, so BRING IT ON!! :D

47ford

03-11-2009, 01:37 PM

My STOCK A4 is speed limited to 130mph... :(

EGbeater

04-28-2009, 07:55 PM

The top speed I have hit at Pueblo was 142mph. That was with my car 100% stock and with street tires.

I now have upgraded the brake ducts/pads/rotors and lines , installed a roll bar, race seat and a set of six point harnesses.

This is obviously an old outdated thread at this point, but just for the record: During the open track day on April 24th at HPR, I saw an indicated 142-ish mph at the end of the back straight in my Evo, before braking VERY EARLY @ 4 1/2-ish by the braking signs.

This is on Dunlop Direzza Z1 street/autox tires, and with an unresolved boost problem. If I go back on 275-width R-compounds and at full power, I'd expect peak speeds over 150 mph for sure.

PaulL

04-28-2009, 08:18 PM

Wow, that's fast, Hsun.
I know both Luyendyk and Pettiford hit the low 140's in the C6 ZO6.

gordon0412

04-28-2009, 08:28 PM

Wow! :eek: The best I saw was 131. But of course I'm sure you were carrying at least 5 more mph onto the entrance, and I was braking at 5! Car can probably handle 3-1/2, but I'm not willing at this point. I've got tons of work to do on the rest of the track to carry more momentum and speed onto the straight, and the guts to push that braking point before I'll ever hope to see 150.

Maxx schlick

04-28-2009, 10:55 PM

My BMW 318is blasted down the straight at OVER 100mph! 101 to be exact. I'm in the tripple diget club...................... H Stock rocks!!
http://i116.photobucket.com/albums/o14/maxxschlick/bmw/080315-0000204031-GP5B7114.jpg

GingerGSR

04-29-2009, 12:15 AM

Traqmate data shows my best speed at the end of "Highway Straight" was during my 8th session = 111.72 MPH.

John Scheier

04-29-2009, 07:50 AM

I was getting 115 pretty regularly. I saw 118 once or twice when I was able to get a good 2/3/4 segment going (wasn't easy on Friday).

GingerGSR

04-29-2009, 07:57 AM

Traqmate data shows my best speed at the end of "Highway Straight" was during my 8th session = 111.72 MPH.

My speedometer showed 112-115 at my braking point most laps. I figure the Traqmate is more accurate.

Built-By-Bones

04-29-2009, 07:59 AM

how do those speeds compare to what you guys log at Pueblo, or La Junta

seem to be in the same ballpark?

GingerGSR

04-29-2009, 08:03 AM

how do those speeds compare to what you guys log at Pueblo, or La Junta

seem to be in the same ballpark?

Going by the speed-o-meter, I'm running exaclty the same as PMP. IIRC my fastest speed last year was 115 MPH by the speed-o-meter. If I were to remove the new air dam & wing I might go a touch faster at HPR.

Built-By-Bones

04-29-2009, 08:05 AM

cool, thanks.

I expect we will all improve our top speeds a little as we get used to turn 3, and carry more speed through there.

John Scheier

04-29-2009, 09:35 AM

I think 'overall', HPR is a faster track. I spent a lot more time at the top of a gear than at PMP.

3 & 4 can be REALLY fast. I'm thinking with fresh tires, that will be hella-fun.

10 is very fast as well... but if you look off the edge between 10 and 11... not much wiggle room if you go off.

EGbeater

04-30-2009, 04:27 PM

During the open track day on April 24th at HPR, I saw an indicated 142-ish mph at the end of the back straight in my Evo, before braking VERY EARLY @ 4 1/2-ish by the braking signs.

Traqmate data shows my best speed at the end of "Highway Straight" was during my 8th session = 111.72 MPH.

Well, I don't have data anywhere near as accurate as what Mark's got.

But according to this website:

http://www.1010tires.com/TireSizeCalculator.asp

The difference in circumference between my 245/40-17 Dunlops and the OEM 235/45-17 Advans will cause a 2.47% speedo error... that's assuming my speedo is accurate at those speeds.

So, 142-ish mph minus 2.47% = about 138.5 mph (assuming I did the math right)

And Grant: It's hard to say how much faster HPR is than PMI, since my car's changed a lot since my last outing at Pueblo. But I'd guess that HPR is about 4-5 mph faster at the end of the back straight than the front straight at PMI... in my car, if I could drive them both with the Evo in the same state, with optimal braking points/exit speed onto the straights at both venues.

Maxx schlick

05-05-2009, 08:52 AM

Now that I have been there in 3 different cars here is the result.
BMW 318is maxx speed 101 mph
AIX Camaro with a punched out LS3 130 mph
C6 Z06 Corvette on runflat street tires. Maxx is yet to be determined. I let off at 142mph (lifted way early on the straight with lots of room left) Probably can hit 155-160mph.

LoCore

05-05-2009, 09:10 AM

Data shows my top speed at the end of the straight was 121.

"Excuses" :) :
1. Street tires (Dunlops Z1 Star Specs)
2. Never did get T3 "right"
3. Braking start at the 4 marker

I'd agree with Hsun; I think its slightly faster than Pueblo. Because of the uphill at the end of the straight, will take awhile to get braking figured out.

BlueVelocity

05-05-2009, 09:12 AM

There's plenty of straight for me. Even braking way early I was seeing 150+ without much issue. Once I get the brake zone figured out along with the previous corners leading to the straight, I think 170 is rather attainable. I put an incar video up in my other thread too.

Erron S.

Jake Latham

05-05-2009, 09:38 AM

GingerGSR

05-05-2009, 11:33 AM

2. Never did get T3 "right".

Don't lift coming around through 2.:eek:

mjmauro

05-05-2009, 01:58 PM

My data shows 113, but that is pushing the braking point to inside the 200 ft mark. I need all the room I can get just to get to that speed.

John Scheier

05-05-2009, 02:37 PM

My data shows 113, but that is pushing the braking point to inside the 200 ft mark. I need all the room I can get just to get to that speed.

I had to lift at 100 in order to not 'punt' you ;)

BlueVelocity

05-05-2009, 02:44 PM

My data shows 113, but that is pushing the braking point to inside the 200 ft mark. I need all the room I can get just to get to that speed.

This surprised me actually Mark. I thought you would easily be seeing 120+?

Chris_Swearingen

05-05-2009, 03:00 PM

All this talk of time trials makes me want to put a cage in the miata, but my top speed is 69.23 mph.:(

Oh, wait, you guys get to use gears higher than second don't you?:eek:

PaulL

05-05-2009, 05:32 PM

Slightly different car type, but the Stohr's data showed a best of 138 before braking before T4, right around the "2.5" marker.

I overheard somebody saying that we were doing 170 or so...not quite! :D

-Jake

I only hit 127 in the Radical ... this is a few mph more than Pueblo (Front Range Motorsports Park?)

See vids here;
http://www.rmsolo.org/forums/showpost.php?p=43653&postcount=14

pcharles

05-06-2009, 12:58 PM

According to my rough calculations, I will hit 138.24315 mph.

-pat

mjmauro

05-06-2009, 01:10 PM

I had to lift at 100 in order to not 'punt' you ;)

It might have sped me up!

mjmauro

05-06-2009, 01:14 PM

This surprised me actually Mark. I thought you would easily be seeing 120+?

Yea I wish. Maybe its the wide tires slowing me down on straights, but they sure help in the twisties.

dandeman

05-06-2009, 01:53 PM

I talked to Jake last night, and he said he was hitting the rev limiter at 185!

BlueVelocity

05-06-2009, 02:58 PM

I talked to Jake last night, and he said he was hitting the rev limiter at 185!

Whoa! Which Jake?

Jake Lehmkuhl

05-06-2009, 05:12 PM

Whoa! Which Jake?

Wasn't me. A couple of weeks ago during a testing session I hit 181 bouncing off the limiter. I think with a little more practice I should be able to manage faster out there, but I really want to concentrate on going faster through the rest of the track, not just that straight.

GingerGSR

05-06-2009, 05:16 PM

Whoa! Which Jake?

"Darth" Latham I would assume! :D

LoCore

05-06-2009, 06:00 PM

"Darth" Latham I would assume! :D

I don't think the Sports Racers are that fast, using aero to trade straighline speed for cornering speed.

shoeish

05-07-2009, 08:27 AM

Wasn't me. A couple of weeks ago during a testing session I hit 181 bouncing off the limiter. I think with a little more practice I should be able to manage faster out there, but I really want to concentrate on going faster through the rest of the track, not just that straight.

181mph in what? I thought my indicated 130 was fast.

GingerGSR

05-07-2009, 08:56 AM

I don't think the Sports Racers are that fast, using aero to trade straighline speed for cornering speed.

Slightly different car type, but the Stohr's data showed a best of 138 before braking before T4, right around the "2.5" marker. -Jake

I guess he did state his end-o-straight speed... He slows down to my top speed for T-4... SHEESH!!! :eek:

Jake Latham

05-07-2009, 09:49 AM

Nah, I just keep adding 5mph to my top speed every time somebody asks. It's up to 190 now, since Dan asked. May break 200 by the weekend :D

Our motors only make something like 95lb-ft of torque, so we get to 110-120 in an all-fired hurry, and it takes a long time to go faster than that. I had the rear wing pegged (1st-weekend-chicken-stability), so I imagine I may see 140 or a little over later in the year.

Like David says, the aero results in a bit of drag, but the cornering speeds and g's are an absolute hoot. The key to our laptimes is that we don't have to slow down very often. :D

The other Jake has a bazillion horsepower DSM.

-Jake

Jake Lehmkuhl

05-07-2009, 09:58 AM

LoCore

05-07-2009, 10:05 AM

I'll have to post the video of one of my Friday open track sessions, as I was getting buzzed by all sorts of Wings and Things. Humbling to say the least.

It includes a rather nice, but brief shot, of Darth Latham whizzing by in the DSR. Sweet.

Hey Jake--how fast is your top speed now?

GingerGSR

05-07-2009, 11:22 AM

I'll have to post the video of one of my Friday open track sessions, as I was getting buzzed by all sorts of Wings and Things. Humbling to say the least.
Same here. I'm putting one together for Lindsey to show at PPIR on Memorial Day Weekend. It's all of the footage I managed to get recorded (1 hr. & 50 minutes which is less than 1/3 the time I spent on track that day :eek: ).
Once it's rendered I'm going to chop it up and only use the passing clips for posting on Youtube.
Why do they allow video up to 1GB in file size yet limit the duration to 10 minutes? Seems sorta silly to me.