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A friend of mine and i have an ongoing arguement! What is the TRUE actual top speed of the Fastest STOCK Thunder cat made?

My buddy told me they went 127 on radar DEAD STOCK!

Thanks
 

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Originally posted by Kevin/T-Cat1000@Oct 19 2005, 12:06 AM
That is possible.
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under the absolute most perfect snow/ice conditions and factory assy work combined

edit: and i do mean perfect!
 

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Stock 24-39 gearing limits top speed. I have run as high as 22-33 for lake
runs in mine. Run 25-38 most of the time. The 24-39 are short of 120..
At 9000 the track is nearing 118...The new MACHs are fast on top as 118
is what they go stock. Dont worry all that TANK will see is tail lights just
like the RX-1TONS. 86lbs verses 130lbs of torque....Same weight 644
at the dirt drag scales...
 

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Originally posted by user2@Oct 19 2005, 10:17 AM
Stock 24-39 gearing limits top speed.  The 24-39 are short of 120..

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got news for ya', gunned a 95' zrt 8 at better than 126 ''outta' the box'' with just properly aligned clutches and 168 studs, took .6 miles(little over 3000 feet), but it did do this, the t-cats will pull it sooner though :cn:
 

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Originally posted by user2@Oct 19 2005, 09:17 AM
Stock 24-39 gearing limits top speed. I have run as high as 22-33 for lake
runs in mine. Run 25-38 most of the time. The 24-39 are short of 120..
At 9000 the track is nearing 118...The new MACHs are fast on top as 118
is what they go stock. Dont worry all that TANK will see is tail lights just
like the RX-1TONS. 86lbs verses 130lbs of torque....Same weight 644
at the dirt drag scales...
<div align="right">index.php?act=findpost&pid=940084
[/quote]

your forgeting either the larger drivers or overdrive .24-39 gearing.615 x .0192x9000 RPM =106.27x1.12 for the drivers=119.02 x 1.12 overdrive=133.30

8400 RPM is good for 124.4
 

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Well, I don't know where the 9000 rpm came from but a stock T-Cat with hot pipes is rated at 8300 rpm. So 8300 rpm with 24/39 (1.63) gears and a .90 overdrive = around 121 mph. We ran a stock 1997 ZRT 800 in the asphault drags and went 10.53/122.2 mph with 24/39 (1.63) gears. Kinda bears out the math.

Auggie
 

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mph=0.0192x9000x.615=106.3x1.12=119.056 before belt slip and track
slip. All ZRTs had 9 tooth drivers. Most tuners work on secondary cover
to get all of the 1.12 or a little more. With the 25x38 went 122 at 9000
on the digatron and radar gun on HOUGTON LAKE MI on hard pack. 1999.
The stock pipes peak in the high 8000s with crank key. The speed is limited
as the engine over revs and falls off the pipe.
From ARCTIC CAT MANUAL 2256-088 page 6-6 chain case performance.
This is the 1999 PERFORMANCE MANUAL I bought with the T-CAT.
 

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Sorry guys, but the calculations mean squat for top speed.

Guys run 24-39 and go 135mph at 8500 rpm. and faster...my buddy with a PS1000 radars at 145mph, but he is not online to ask what gear he runs, pretty sure it's 24-39.
 

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Originally posted by 87gtNOS@Oct 19 2005, 09:30 PM
Sorry guys, but the calculations mean squat for top speed. 

Guys run 24-39 and go 135mph at 8500 rpm.  and faster...my buddy with a PS1000 radars at 145mph, but he is not online to ask what gear he runs, pretty sure it's 24-39.
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I bet he is running 10 tooth drivers>>?? I have do disagree that the formulae means squat. The formulae (if correct) is based on factual diameters / speed / rpm / etc. What the formulae can not account for is resistance / wind / conditions and lug height.
 

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Originally posted by user2@Oct 19 2005, 10:12 PM
mph=0.0192x9000x.615=106.3x1.12=119.056 before belt slip and track
slip.                                                                                                                                 


All ZRTs had 9 tooth drivers.
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looks like you forgot the 12% additional for the 9 tooth drivers,,,,.0192 x 1.12 = .021504 :frech32:

all zr's and zrt's, not to mention t/cats had them starting in 1993 :dohdoh:
 

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the formula can't count for TRUE overdrive ratios. Stock clutches won't do much overdrive....

he runs 9t drives..


edit..these formulas are good refernce to see ratio changes....
 

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Originally posted by user2@Oct 19 2005, 09:12 PM
mph=0.0192x9000x.615=106.3x1.12=119.056 before belt slip and track
slip. All ZRTs had 9 tooth drivers.
From ARCTIC CAT MANUAL 2256-088 page 6-6 chain case performance.
This is the 1999 PERFORMANCE MANUAL I bought with the T-CAT.
<div align="right">index.php?act=findpost&pid=941944
[/quote]

read the fine print arctic gear charts are based on the 8 tooth drivers you have to add 1.12 for 9 tooth
 

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Originally posted by 87gtNOS@Oct 19 2005, 09:30 PM
Sorry guys, but the calculations mean squat for top speed. 

Guys run 24-39 and go 135mph at 8500 rpm.  and faster...my buddy with a PS1000 radars at 145mph, but he is not online to ask what gear he runs, pretty sure it's 24-39.
<div align="right">index.php?act=findpost&pid=942021
[/quote]


I bet those running those speeds are running 10 tooth drivers>>?? That adds 10% to the gear ratio. I have do disagree that the formulae means squat. If the formulae is based on factual diameters / speed / rpm / etc than it should be accurate excluding conditions or other variables. What the formulae can not account for is resistance / wind / conditions.

On ice WITH 25/39 gear in 2000 feet I ran 124.7 (on 2 guns, 1-Stalker 124.7 & 1-Speedcheck read 124) . The same day I ran a 123.8 with the stock gear. If you do the math 24/39 =.61 x .0192 x 8500 X 1.24 = 124.5 MPH. It makes sense to me. If I had the power to pull the 25/39 GEAR to the full shift in that distance I should have been 129 mph.

The fastest STOCK T-Cat (clutched) I have seen was 121.7 mph in 2000 feet. That was on a Stalker Gun. :beerchug:
 
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