You're right.
-----Original Message-----
From: Adam Bradley <ambradley@yahoo.com>
To: Patrick P. Castronovo <slick1@mohaveaz.com>;
datsun-roadsters@autox.team.net <datsun-roadsters@autox.team.net>
Date: Wednesday, February 07, 2001 9:21 PM
Subject: Re: Rear End (was Re[2]: EFI / custom engine)
>You got my question backwards. By using smaller tires (which I already
>am), I am EFFECTIVELY raising the rear end ratio from the original 3.90
>to near 4.11. I want to put in the 3.70 rear end, which with smaller
>than stock tires (195/50/15 are actually smaller than stock) will
>effectively put me back near the stock 3.90.
>
>Adam
>
>--- "Patrick P. Castronovo" <slick1@mohaveaz.com> wrote:
>> What I meant is if you wanted to see what you would in essence be
>> doing, is
>> to "TRY" using 2 rear wheels in the 13" rim and tires.(Corvair will
>> fit)
>> then you will see for yourself with smaller tires, you will go
>> SLOWER, and
>> if you go to a 4.11 rearend, you will go slower still.
>> PAT
>> -----Original Message-----
>> From: Adam Bradley <ambradley@yahoo.com>
>> To: Patrick P. Castronovo <slick1@mohaveaz.com>;
>> datsun-roadsters@autox.team.net <datsun-roadsters@autox.team.net>
>> Date: Wednesday, February 07, 2001 7:10 PM
>> Subject: Re: Rear End (was Re[2]: EFI / custom engine)
>>
>>
>> >No, I want BIGGER rims, not smaller! But I could get some 13x10
>> >positive offset gold wire wheels and some really small tires - cool!
>> >
>> >But seriously, is that a YES to changing the rear end to give me a
>> >better freeway speed driveability/mileage?
>> >
>> >--- "Patrick P. Castronovo" <slick1@mohaveaz.com> wrote:
>> >> before you go into the expense of changing your rear end, try
>> >> dropping to a
>> >> 13" tire, and you will see the difference using a higher geared
>> >> rearend will
>> >> feel like.(411) You will have a faster pickup, but your top end
>> and
>> >> your
>> >> Gas Mileage will suffer. Pat
>> >>
>> >> -----Original Message-----
>> >> From: Adam Bradley <ambradley@yahoo.com>
>> >> To: datsun-roadsters@autox.team.net
>> <datsun-roadsters@autox.team.net>
>> >> Date: Wednesday, February 07, 2001 5:46 PM
>> >> Subject: Rear End (was Re[2]: EFI / custom engine)
>> >>
>> >>
>> >> >About the different rear end, I've got a '70 1600 with 195/60/14
>> >> tires.
>> >> > I plan to replace these with 195/50/15, which is actually a
>> >> fraction
>> >> >of an inch smaller in outer diameter than 195/60/14. It was
>> >> suggested
>> >> >to me that I might want to replace my 1600 rear end with a 2000
>> rear
>> >> >end, as the lower tires turn my 3.90 into more like a 4.11,
>> reducing
>> >> my
>> >> >top speed and increasing RPMs at a given speed. Any thoughts?
>> >> >
>> >> >Adam
>> >> >1970 1600
>> >> >1967 1600 (probably sold this Saturday)
>> >> >
>> >> >--- Fred_Katz@ci.sf.ca.us wrote:
>> >> >> Pat,
>> >> >>
>> >> >> You just can't compare an Altima to the roadster. Apples vs.
>> >> Oranges!
>> >> >>
>> >> >> My '66 2000 cruises between 4000 and 4500 rpm at highway
>> speeds,
>> >> and
>> >> >> I'm
>> >> >> getting about 26 mpg. I've got the 1600 rear end (3.90?). In
>> city
>> >> >> driving,
>> >> >> stop and go, the mileage drops below 20 mpg, where the tach is
>> >> often
>> >> >> at
>> >> >> 3000 (peppy!). Lower rpms do NOT guarantee consuming less
>> >> gasoline.
>> >> >> And I
>> >> >> know quite a few of the other BADROC'rs are getting similar
>> mpg,
>> >> >> about 24
>> >> >> to 28 mpg on the highway.
>> >> >>
>> >> >> Fred - So.SF
>> >> >> BADROC
>> >> >>
>> >> >> ______________________________ Reply Separator
>> >> >> _________________________________
>> >> >> Subject: Re: EFI / custom engine
>> >> >> Author: "Patrick P. Castronovo" <slick1@mohaveaz.com>
>> >> >> Date: 2/7/2001 1:20 PM
>> >> >>
>> >> >>
>> >> >> 3800 RPM on the Highway is consuming a lot of Gasoline. My '98
>> >> >> Altima gets
>> >> >> 27 on the highway and it is turning at 2200 RPM @ 60 mph. You
>> >> must
>> >> >> be at
>> >> >> about 20 MPG. I know my roadster(67.5 2000 w/Solex) gives me
>> 30
>> >> MPG
>> >> >> on the
>> >> >> highway. I don't know the Ratio.
>> >> >> Pat.
>> >> >> -----Original Message-----
>> >> >> From: Daniel Neuman <dneuman@quark.sfsu.edu>
>> >> >> To: slick1@mohaveaz.com <slick1@mohaveaz.com>
>> >> >> Cc: Erickson Philip <philip.erickson@Agouron.COM>; "ROADSTER
>> >> >> (E-mail)"
>> >> >> <datsun-roadsters@autox.team.net>
>> >> >> Date: Wednesday, February 07, 2001 12:04 PM
>> >> >> Subject: Re: EFI / custom engine
>> >> >>
>> >> >>
>> >> >> >Hello,
>> >> >> > I have the 4.11 LSD on my Solex U-20, I really don't think it
>> >> makes
>> >> >> >that much of a difference in around town gass mileage. On the
>> >> >> freeway I am
>> >> >> >turning maybe 3800rpm at the super fast CA freeway cruising
>> >> speeds.
>> >> >> > But I do think that it makes a difference in low rpm power.
>> The
>> >> >> >car really does feel more peppier.
>> >> >> > Daniel 69 2000
>> >> >> >
>> >> >> >> I would think that using a 4.11, or 4.38 Rear End would be
>> >> great
>> >> >> for the
>> >> >> >> track, but for the street application it would be revving
>> high,
>> >> >> and on
>> >> >> the
>> >> >> >> Highway it would reduce your top end and severely affect
>> your
>> >> Gas
>> >> >> Mileage.
>> >> >> >> But hey! I know all you roadster owners are Independently
>> >> Wealthy,
>> >> >> So
>> >> >> what
>> >> >> >> the hey! Go for it. Pat
>> >> >> >> -----Original Message-----
>> >> >> >> From: Erickson, Philip <philip.erickson@Agouron.COM>
>> >> >> >> To: ROADSTER (E-mail) <datsun-roadsters@autox.team.net>
>> >> >> >> Date: Wednesday, February 07, 2001 8:17 AM
>> >> >> >> Subject: EFI / custom engine
>> >> >> >>
>> >> >> >>
>> >> >> >> >Ronnie said "Looks to me like a blueprinted bottom end with
>> a
>> >> >> >> >mildly ported head with careful cam selection, around 9.5
>> or
>> >> 10
>> >> >> to 1 CR
>> >> >> >> >and EFI, along with a 4.11 or 4.38 rear end would be a
>> killer
>> >> >> combination"
>> >> >> >> >
>> >> >> >> >my sentiments exactly , I guess I should have kept my
>> fingers
>> >> >> quit.
>> >> >> <grin>
>> >> >> >> >
>> >> >> >> >Philip Erickson
>> >> >> >> >San Diego Calif. 92121
>> >> >Yahoo! Auctions - Buy the things you want at great prices.
>> >> >http://auctions.yahoo.com/
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