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Subject: pre61-list Digest V2000 #192
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pre61-list Digest Thu, 05 Oct 2000 Volume: 2000  Issue: 192

In This Issue:
60 mph rpm
tire size calculator
Re: The tire size calculator on FTE website
power brakes?

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From: BOBWOOD536 aol.com
Date: Thu, 5 Oct 2000 05:48:03 EDT
Subject: 60 mph rpm

Randall,
My Hick's 4x4 catalog has a chart, and according to it. a V8 or strong 6
should run at 2500 rpm +/- 150. As for tire size the chart says:
   Tire size     27    27.5     28      28.5    29     29.5     30     31
     2.73       2050  2000    1950    1925   1900 1850   1825  1775
G  2.90        2175  2125    2100    2050   2025 1975   1950  1875
E  3.08        2300  2275    2225    2175   2150  2100   2075  2000
A  3.23        2400  2375    2325    2275   2250  2200   2150  2100
R  3.31        2475  2425    2375    2325   2300  2250   2225  2150

  It also has a formula for figureing out rpm at any given speed it is
MPH X Drive Ratio

                      ----------------------------  X 336 = RPM

                      Tire Diameter
 This is good also for checking your tach.
I hope this helps.
BOB WOOD
60 F100
302/C6

------------------------------

From: JNiolon uss.com
Date: Thu, 05 Oct 2000 06:51:07 -0500
Subject: tire size calculator

I'm not a 302 expert but for a 460 it works out like this
(cu. in don't matter in this)


RPM = mph x gear ratio x 336 divided by tire diameter
this gives you the engine rpm if you know the other numbers



Gear Ratio = rpm x tire diameter divided by mph x 336
this gives you the gear ratio if you know the others


and finally

tire diameter = mph x gear ratio x 336 divided by rpm
this givies you the tire diameter to use given the other numbers


that help  ????

there is a very good book on Auto Math titled  the "Auto Math Handbook" by
John Lawlor
gives you all kind of formulas from comp ratio to displacement to gForce to
Blood Alcohol Concentration
it's worth the 15 bucks

john


------------------------------

From: "O'Connell, Dennis M" <DMO1 pge.com>
Subject: Re: The tire size calculator on FTE website
Date: Thu, 5 Oct 2000 07:08:42 -0700

Randall


There is a web site WWW.ring-pinion.com has a rpm calculator and talks tire
size, etc..  Their chart says;
Small block 1800 - 2800
Big block     1600 - 2600

Informative site.  Check it out.

Dennis
55F100
> ----------
> From: Randall Colgan[SMTP:rcolgan telusplanet.net]
> Reply To: pre61-list ford-trucks.com
> Sent: Wednesday, October 04, 2000 8:47 PM
> To: pre61-list ford-trucks.com
> Subject: [pre61-list] The tire size calculator on FTE website
>
> Do any of you 302 experts know what a good RPM is to run at 60 MPH?  I'm
> trying to decide what size tires I should buy for my 52 F1.  I'm running a
> 302/C4 combo with a Granada 2.78:1 ratio diff.  The calculator (tech
> articles) on the FTE site gives me 29.5" diameter tire.  The calculator
> defaults at 2000 RPM.  Is that a good RPM?
>
>

------------------------------

From: "John Harrison" <pnltrk hotmail.com>
Subject: power brakes?
Date: Sat, 07 Oct 2000 23:30:10 GMT

Chris,
 Do you have a manual or automatic trans? Some boosters may be in the way
of the  clutch M/C. I have a 60 panel delivery with an automatic & used a
Ch**y dual diaphram booster from an early 80's 1/2 ton P/U. The mounting
flange on the booster lines up perfectly with the M/C bolt holes in the
firewall & the push rod cover/seal is an exact fit with the hole in the
firewall. All you need to do is drill the booster flange to locate the 4
bolt holes. The push rod coming out of the booster is  2 pieces. Unscrew the
rear piece & discard. Install a female heim joint on the remaining part &
mount to brake pedal with a GRADE 8 BOLT!! The master cyl is a dual piston
but it shouldn't be too hard to adapt to your truck. Hope this helps.

John Harrison
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------------------------------

End of pre61-list Digest V2000 #192
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