Anyone doing this during the weekend??
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June Sprint Trap Speeds
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 Clark Lincoln |
June Sprint Trap Speeds |
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Registered User
Posts: 835 06/23/09 10:27:51 |
Last Edited By: Clark Lincoln 06/28/09 20:51:35.
Edited 1 time.
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Ren |
#1 | |||
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Registered User
Posts: 579 06/23/09 17:33:21 |
Arnie Loyning was ensconsed up at the entry to Turn 1 capturing front straight speeds - in CSR the fast guys were hitting 149-150 at the end of the straight
(the French boys), in DSR the speeds were a bit more distributed (Garry Crook skewed the curve...
 ), but in general were a few MPH off the top CSR speeds. Top speeds
in FA were a bit over the map as well - 147-148 for Mirl Swan and me, but everybody else was around 144-145. Don't know about any of the other classes...
Cheers, Rennie |
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D T Benner |
Rennie DNS? | #2 | ||
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Registered User
Posts: 116 06/23/09 17:55:37 |
I don't mean to Hy-Jack this thred but what happened? Saw you Qualified 5th.
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Ren |
#3 | |||
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Registered User
Posts: 580 06/23/09 19:10:25 |
Darrell,
I gave a pretty good synopsis on the ApexSpeed Sprints FA thread. Long story short, we had a hydraulic failure in the gearbox in morning qualifying, and ran out of clock to fix the problem. Pressure line to the clutch slave cylinder burst in the bellhousing after being abraded on an exposed edge, and the only way to get at the offending part is to break the car in half... it was a heartbreaking way to end the weekend, as we were making 2+ second improvements to the car (and my sloppy / rusty driving) every session, and I believe we had a realistic shot by Sunday afternoon to sniff at the podium. For me, our Sprints results were completely UNSAT, but we will be installing a bulkhead fitting to avoid this issue in the future. Much work to do in the next few months to get the Ralt ready for the big show... Cheers, Rennie |
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George Dean |
Trap Speed? | #4 | ||
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Registered User
Posts: 222 06/24/09 15:55:03 |
Does anyone know Garry's trap speed?
George |
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LDOGGYDIZZLE |
#5 | |||
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Registered User
Posts: 244 06/24/09 16:09:59 |
We were taking trap speeds also and did not see anyone skewing the curve, I'd love to see the data.
Myself, Bootz, Crook were in the 146-148 range going into 1. Most WF1's were in the 139-144 range. My data shows the top speed of 151 entering 12 after going through kink at 142mph with carosel speeds of 111mph. And 149 into 5. We also played with aero quite a bit to try to increase top speeds but surprisingly saw no change. But we'll continue to play with this at the CAT National. I saw data of JR's speeds from last year, 153 into 1, 155 into 5 and the same for 12. 
C'mon Gary (and everyone else), share some data, I'm sure you're running some type of data system.
BTW, my wheel circumference I have entered is 70.057 for rears and 62.832 for fronts.
Lawrence Loshak
#02 DSR Stohr WF1 R.I.P. Tom Thrash, a true Champion... On AND off the track.
Last Edited By: LDOGGYDIZZLE 06/24/09 16:28:37.
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David Ferguson |
To correct speeds -- normalize to lap distance | #6 | ||
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Posts: 1307 06/24/09 18:11:10 |
To equalize the data, tell us what your data system thinks the track length is (in feet). We can then develop correction factors for various data systems.
Last Edited By: David Ferguson 06/29/09 10:00:37.
Edited 1 time.
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Travis Duder |
North Side of 160! | #7 | ||
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Registered User
Posts: 266 07/07/09 13:05:06 |
Have to give credit to Tom Robertson for the quote.
That was way back at the turn of the century. Saw 148-149 then and it's the same today. Bought a radar gun way back then (bullstuff stops) and it must have been broke as it never ever registered any C/DSR above 150, everywhere including downhill out of T4 at Daytona. (Can't say Igo them all but have sat and clocked the fastest of them over the years... I'd bet French has been really fast over the years but never caught him on hte gun.) But, My data said the "North side of 160" and 154.5 upside down and backwards and my propeller diameter was 81.680726531498... But then that's what the forum is for...
Travis
DSR 82 |
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Jeff Shafer.socalpeeps |
#8 | |||
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Registered User
Posts: 27 08/03/09 14:46:31 |
How accurate does everyone feel the GPS speed is? We run the AIM Pista w/ GPS.
Don's best top speed was 152.9 but averaged more like 150. I noticed the wind made a good difference for which straight was the quickest. |
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Bill Lomenick |
GPS speed | #9 | ||
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Registered User
Posts: 532 08/03/09 16:15:20 |
I use a Motec and the GPS speed is with in 1 MPH of wheel speed and most of the time it is within .5 MPH
Bill Lomenick |
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Add Reply
- 2009 Races
- General Discussion
- IMSA Lites
- Vintage: H Modified
- Getting Started
- Driving Techniques
- Aerodynamics
- Car Building
- Engine, Carburation, EFI, Oiling
- Rules Discussion
- Suspension, Tires, Wheels
- Other Technical Discussion
- For Sale: Cars
- For Sale: Engines & engine parts
- For Sale: Misc. Parts, Trailers, . . .
- Wanted: Cars & Parts
- Links, HOW TOs?, Reference info.
- Sold Items, (kept for reference)
- 2008 Races
- 2007 Races
- 2006 Races
- 2005 Races
- 2000 - 2004 Race Results (read only)
- Weight Debate
