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Discussion Starter #1
These are stock sleds just studded.Sorry they didnt have the years of the sleds  SRX 700 YAMMY 113.8 mph     MACH 1 700 DOO 113.8 mph    MXZX 800 Doo 109.2 mph      2001 XCSP 600 POL 100.8     ZR 700 CAt 100.6 mph        ZR 800 Cat 108.4 mph        XC 800 POL 104.6 mph        XCR 800 POL 106.6 mph       XCR 600 POL 105.4 mph       MXZ 440 fan DOO 84.6 mph    MXZ 600 DOO 98.4 mph        F 3 600 DOO 104.9 mph       ZR SNO PRO 440 CAt 89.1     SRX 700 YAMMY 98.3 mph      T-CAt 900 111.9 mph         X EDGE 600 POL 101.9        MXZX 440 DOO 97.7 mph       MACH Z DOO 114.5 mph        T-CAT 1000 111.4 mph       They ran on a 2000 ft track the gun dont lie.
 

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Those would be 1000ft speeds in Minnesota  what was the temp 65 degrees fahrenheit or what. And radar guns can lie, quite a lot actually. they need to be tuned frequently, and sleds are harder to pick up on radar than cars. Was this run on snow pack and not bare ice or what?
 
 

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I'm not disputing the results, but radar guns have to be calibrated with a tuning fork (don't ask I don't know)  
I can remember reading in Hot Rod back in the late 70s or early 80s an article about radar & how the guns work. I've heard in the past how such & such a sled went so fast. It had to be right because it had been checked with radar. How well are they looked after? Between weekends are they tossed behind the seat of a pickup?

If radar is so accurate, why do most drag racing sanctioning bodies use timing lights?
 

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Ya, at the radar run I raced in this season, my buddy did 103 mph with his 98' MXZ 500.  He never made it that fast EVER.  One of the other sleds we raced that day, an open mod 400, made it's best speed that day too.  We believe the gun was off.
 

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84 mph out of a MXZ 440F
Is that possible? The magazines have always said it's the slowest of the 3 440 fans. I wonder how fast the AC & Polaris sleds are  
 

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Discussion Starter #8
The improved stocK sleds where very fast the Mach z was over 130 mph and there was a t-cat that ran 140 mph.The speeds i posted where stock sleds.I seen old forge shoot out results and a stock mach z went 107 in the quarter.Asphalt racing is totaly different everything rolls a little easier and nhra uses timming equipment just for that the time,drag racing is all about ET.I will post the link to the site later.
 

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Oh yeah! I put a cat speedo on mine and it hit 145 mph in 660ft!
 

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lol...... yeah your rite: with those speeds they are kinda close for running snow.  but i did do 119mph on ice no footage just go as long as u want and i have hit 122 mph in a 1/4 mile asphalt .......all stock machzr 2000
 

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I'd trust an uncalibrated beaten-up radar more than the speedo an any sled any day on any surface.
 

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I trust gps.  Radar has problems somtimes but 99% of the time its right.  Speedos on the machines are just for decoration once your passed 130km.
 

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Performancex is right!!  speedo's are kind of window dressing, I have been around a few radar guns and they were all very accurate,, also they CAN pick up a sled from at LEAST a 1000' away, and you can see the speed build as they fly past you
 also  if there is a groug of sleds 3 to 6 sleds or so racing, towards the gun, the gun will pick out the sled going fastest,,,
 

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Sleds can be a bit tricky to pick up on the radar gun , some people try to hold it free hand rather than resting it or having a tri-pod. We have found the results very inacurate if held free hand. Our club holds a radar run every year on a 1320 foot ( 1/4 mile ) snow track . The results are posted on my web page at  http://www.sciencehilldrifters.com/     (click on club events ). We checkthe calibration of the gun regularily with the tuning fork and even checked it out against a gps once , it was very close.  I think a lot of different speeds reported are because of different track lenghts and ground conditions , we have never seen a sled do 130mph in a 1/4 mile on our track. Hey it's all just for fun any how .
 

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You cant go as fast in Canada because the alitude is higher!

Heheheheheheh
 
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