Re: Fw: [Chrysler300] Rear End 300F-fUN WITH NUMBERS

[Edward Mills Antique Tractors <millserat@xxxxxxxxxxxxx>]

Top Gear always 1:1 until Overdrives of the 80's or there about.

2300 RPM at 60 sounds about right - say 4600 RPM at 120 MPH typical Top 
End and most of the cars of that day ran out of HP before they ran out 
of RPM in Top Gear.

And if you stepped down hard on an Automatic, it down shifted into 
"Passing Gear" and it stayed there at higher RPM till about 90 if you 
kept your foot down. - probably in the 3xxx range at 50 MPH and close to 
5000 RPM at 90 before it shifted back to top gear.

If you are turning a real 3000 RPM at 60 MPH, that sounds like an 
unusually high numerical ratio - probably would put engine at 5000 RPM 
at 100 MPH. Don't really think that would be right from early 60's - 
don't know about 50's.

On 8/28/2011 10:16 AM, The Richardson Family wrote:
>
> The math seems to make sense but, that's assuming the final drive 
> through the transmission is a 1:1 ratio. I don't think that's right, 
> is it?
>
> On a limited slip - turn the drive shaft 1 complete rotation and count 
> the revolutions of the wheel - that should give you the correct rear 
> end ratio - or is it the other way around? I don't recall exactly but, 
> I do remember getting 3.55:1 on my "Letter L", which is the pumpkin 
> that was installed by my Stepfather. That's as much as I can 
> contribute to confuse things.....
>
> Dan Richardson
> 300L Family Heirloom
>
> ----- Original Message -----
> From: Rich Barber
> To: 'jean-yves chouinard' ; chrysler300@xxxxxxxxxxxxxxx 
> <mailto:chrysler300%40yahoogroups.com> ; 'Thomas Cox'
> Sent: Sunday, August 28, 2011 1:31 AM
> Subject: RE: [Chrysler300] Rear End 300F-fUN WITH NUMBERS
>
> I've spotted a reference for the 9.00 X 14 tire on the 300F as having 
> an OD
> of 28.68".
>
> Assuming no slippage:
>
> MPH=(3,000*Pi*28.68*60)/(3.23*12*5280)=79.2 MPH.
>
> RPM @ 60 mph=2,273 RPM
>
> Axle Ratio to give 60 MPH @ 3,000 RPM: 4.26 One reference says the
> available ratios ranged from 2.73 to 3.91.
>
> From: Chrysler300@xxxxxxxxxxxxxxx 
> <mailto:Chrysler300%40yahoogroups.com> 
> [mailto:Chrysler300@xxxxxxxxxxxxxxx 
> <mailto:Chrysler300%40yahoogroups.com>] On
> Behalf Of jean-yves chouinard
> Sent: Saturday, August 27, 2011 4:27 PM
> To: chrysler300@xxxxxxxxxxxxxxx 
> <mailto:chrysler300%40yahoogroups.com>; Thomas Cox
> Subject: Re: [Chrysler300] Rear End 300F
>
> I could be wrong here, but isn't the 300F rear end ratio 3:31 to 1 ?
> And the 300G ratio 3:23 to 1??
> I know , not a huge difference...and I agree with Don , 3000 rpm seems 
> high
> at just 60mph...
> Jean-Yves
>
> ----- Original Message -----
> From: Thomas Cox
> To: chrysler300@xxxxxxxxxxxxxxx <mailto:chrysler300%40yahoogroups.com> 
> <mailto:chrysler300%40yahoogroups.com>
> Sent: Thursday, August 25, 2011 8:48 PM
> Subject: [Chrysler300] Rear End 300F
>
> At 60 mph, I am running about 3,000 rpm. Is this to be expected with a 
> 3.23
> rear
> end? I wonder if I have the correct "chunk" in the F rear end.
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
> [Non-text portions of this message have been removed]
>
> 


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