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RE: Speed Application
Nope.. The Jetta and GTI have the same box and gearing.. Now the Corrado is
different..
---PATRICK SHERMAN
patrick@eurospeed.org
http://www.eurospeed.org
97' JETTA GLX / 30K / Tornado Red
-----Original Message-----
From: owner-jettaglx@igtc.com [mailto:owner-jettaglx@igtc.com]On Behalf
Of Greg Coe
Sent: Thursday, October 15, 1998 7:39 PM
To: jettaglx@igtc.com
Subject: Re: Speed Application
No, I know that the GTI and GLX have a 3.39 final drive, and the corrado
uses a 3.65 final drive. Other than that, the O2A boxes are identical in
all the cars. I'm not stupid. I went through a tranny replacement, and
researched all the boxes. Only the Corrado's tranny differs. Look at the
specs, man, the gearing for the GTIVR6 and Jetta GLX are EXACTLY the same.
No question about it. Do the math, and you will see that 6100rpm in fifth
is about 144 mph, give or take a few tenths. That is in BOTH the GLX and
GTI. Anyone with any knowledge of the cars will confirm this. Check VW's
web site. I'm sure there are gear ratios in the specs.
Later,
Greg
----Original Message-----
From: Khan Klatt <kmk@pacificrim.net>
To: jettaglx@igtc.com <jettaglx@igtc.com>
Date: Thursday, October 15, 1998 9:30 PM
Subject: Re: Speed Application
>
>I don't see why you would say "Not true."
>
>First of all, a GTI and a GLX have *DIFFERENT* gearing.
>
>So, the 144mph, was that in the GLX, or in the GTI-- it *will* be
different.
>
>Second of all, I have no factual or experiential basis for this
>"efficiency" rating, but a rating _of_this_sort_ may explain why the top
>speed by the calculation is so far off. I think you'll agree that 179 MPH
>is *NOT* realizable by our GLX's with the current gearings.
>
>As a result, my "adjustment factor" was an attempt to adjust the
>theoretical top speed with a "realistic" top speed, and the factor I "came
>up" (pulled out of my ass) was .75 in fifth gear. I didn't imply that this
>was ABSOLUTELY TRUE, so why are you discounting it off-hand?
>
>All I said was, there should be an adjustment factor that takes into
>consideration real world conditions such as wind resistance. So if the
>factor is not .75 in fifth gear, maybe it's .81 (.81 * 178 = 144)... the
>details of the "factor" are not as important as the general idea of an
>adjustment.
>
>And, again, the gearing on a GTI and a GLX are definitely different, and
>will produce different top speeds.
>
>-Khan
>
>P.S. The speedo reading at 150 was probably not very accurate, as many
>readers have pointed out that the speedo consistently shows several miles
>faster than you are really truly going. It's about 3 mph around 40, and
>about five mph around 60-75, and could be as much as 6 mph around 144.
>
>At 6:44 PM -0400 10/15/98, Greg Coe wrote:
>>Not true. I ran my car to 6100 rpm in fifth gear. With the gearing that
>>the GTI and GLX have, 6100 rpm in fifth equates to 144mph, according to
Todd
>>@ AWE. BTW, the speedo was showing nearly 150 mph at that speed.
>>
>>Later,
>>Greg
>>-----Original Message-----
>>From: Khan Klatt <kmk@pacificrim.net>
>>To: jettaglx@igtc.com <jettaglx@igtc.com>
>>Date: Thursday, October 15, 1998 6:38 PM
>>Subject: Re: Speed Application
>>
>>
>>>At 4:43 PM -0400 10/15/98, VWDrvrsWtd@aol.com wrote:
>>>>In a message dated 10/15/98 2:26:40 PM Central Daylight Time,
>>>>piecuch@hsd.utc.com writes:
>>>>
>>>>> So, let me get this straight....
>>>>> Let's sample Top speed.
>>>>> 205/50 R15 at 6500RPM in 5th gear on a Jetta GLX
>>>>>
>>>>> TD = 23.08" (Stays the same)
>>>>> MPH = (6500 * 23.08)/(0.84 * 1000)
>>>>> MPH = 178.6 WOW!!!!
>>>>
>>>>What, yours doesn't go that fast? :)
>>>
>>>I'm sure mine would go that fast, if it were on a dyno. Add the wind
>>>resistance (our cars are no formula-1 racers) and other factors (perhaps
>>>road friction, etc.) and your road efficiency will be reduced.
>>>
>>>You could add a "efficiency" factor to this calculation, on a sliding
>>scale.
>>>
>>>At first gear, multiply your speed ratings by 0.95, to get "real world"
>>>numbers.
>>>In second gear, multiply your speed calculation by 0.9 to get real world.
>>>In third gear, multiply by .85 to get real world speed.
>>>In fourth, multiply by .80,
>>>and in fifth, by .75 to get real world speed.
>>>
>>>That would produce roughly 135 mph, at 6500 rpm in fifth gear, adjusted
for
>>>"real world efficiency" by my rough "adjustment" factor.
>>>
>>>-Khan
>>>-------------------------------------------------------------------------
--
>>-
>>>
>>>Khan Klatt <kklatt@nw.verio.net>
>>Verio
>>>Network Engineer Bellingham Branch
>>Office
>>>Tel 800.591.2757 x 13 725 N. State
>>Street
>>>Fax 360.738.8315 Bellingham, WA
>>98225
>>>
>>>-------------------------------------------------------------------------
--
>>-
>
>---------------------------------------------------------------------------
-
>
>Khan Klatt <kklatt@nw.verio.net>
Verio
>Network Engineer Bellingham Branch
Office
>Tel 800.591.2757 x 13 725 N. State
Street
>Fax 360.738.8315 Bellingham, WA
98225
>
>---------------------------------------------------------------------------
-