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 Post subject:
PostPosted: Wed May 03, 2006 9:27 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
13 x 4.5"

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


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 Post subject:
PostPosted: Wed May 03, 2006 10:12 pm 
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Turbo Slant 6
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Joined: Tue May 02, 2006 12:16 am
Posts: 708
Location: Ooltewah, Tennessee
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Quote:
13 x 4.5"
Thanks. Where in the world do you get stuff like that??


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 Post subject:
PostPosted: Thu May 04, 2006 12:10 am 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
Quote:
Quote:
13 x 4.5"
Thanks. Where in the world do you get stuff like that??

Old magazine articles, here, various forums, stamped on the wheel............

Incidently, there are 14x4.5" small bolt pattern wheels, so make sure they're 14x5.5"

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Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


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PostPosted: Thu May 04, 2006 6:15 am 
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Turbo EFI
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Joined: Tue Feb 18, 2003 7:34 am
Posts: 2479
Location: Lubbock, Texas
Car Model: 1964 Plymouth Valiant V200 Sedan
Quote:
I think I need to either increase my tire diameter or get overdrive, considering where gas prices are going
Be careful with going taller. Taller tires give do change the effective gear ratio, but there are compromises. Some designs (say, significantly wider tires) have higher rolling resistance.
A tire and rim combination that is heavier or has a higher polar moment will take more oomph to accelerate or decelerate. At a steady speed, this may not mean much, but in the real world of daily driving, it adds up.

_________________
"When you find a big kettle of crazy, it's best not to stir it." - Pointy-haired Boss

1964 Valiant V200, 225/Pushbutton 904
BBD, CAI, HEI, LBP, AC, AM/FM/USB, EIEIO


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 Post subject:
PostPosted: Thu May 04, 2006 7:13 am 
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Turbo Slant 6
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Joined: Tue May 02, 2006 12:16 am
Posts: 708
Location: Ooltewah, Tennessee
Car Model:
Quote:
Quote:
Quote:
13 x 4.5"
Thanks. Where in the world do you get stuff like that??

Old magazine articles, here, various forums, stamped on the wheel............

Incidently, there are 14x4.5" small bolt pattern wheels, so make sure they're 14x5.5"
Gee whiz! Thanks


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 Post subject:
PostPosted: Thu May 04, 2006 7:18 am 
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Turbo Slant 6
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Joined: Tue May 02, 2006 12:16 am
Posts: 708
Location: Ooltewah, Tennessee
Car Model:
Quote:
Quote:
I think I need to either increase my tire diameter or get overdrive, considering where gas prices are going
Be careful with going taller. Taller tires give do change the effective gear ratio, but there are compromises. Some designs (say, significantly wider tires) have higher rolling resistance.
A tire and rim combination that is heavier or has a higher polar moment will take more oomph to accelerate or decelerate. At a steady speed, this may not mean much, but in the real world of daily driving, it adds up.
It's looking suspiciously like this forum is a gold mine. Thanks.


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 Post subject:
PostPosted: Thu May 04, 2006 11:24 am 
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Board Sponsor
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Joined: Thu Oct 24, 2002 3:54 pm
Posts: 191
Location: Atlanta, Ga
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The best handling I ever got with the stock 13x4.5" wheels on my Valiants was with 175/70-13 tires. Anything wider on that skinny rim will just bulge the sidewall out and make the handling mushy. You are somewhat limited as to performance tires these days in that size but it will make you car steer pretty well as anything on the market now is superior to what we had 30 years ago.

_________________
"Former Owner" of '65 Barracuda, 225, Auto, MP 2bbl intake, MP cam, Dutra Duals. Presently Moparless.


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 Post subject:
PostPosted: Thu May 04, 2006 2:34 pm 
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Turbo Slant 6
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Joined: Tue May 02, 2006 12:16 am
Posts: 708
Location: Ooltewah, Tennessee
Car Model:
Quote:
The best handling I ever got with the stock 13x4.5" wheels on my Valiants was with 175/70-13 tires. Anything wider on that skinny rim will just bulge the sidewall out and make the handling mushy. You are somewhat limited as to performance tires these days in that size but it will make you car steer pretty well as anything on the market now is superior to what we had 30 years ago.
Again considering gas prices, it might be as cheap to put in an overdrive (assuming it's possible to find one) as to find and buy 5 rims. Thanks


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 Post subject:
PostPosted: Thu May 04, 2006 2:46 pm 
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Supercharged

Joined: Thu May 12, 2005 11:50 pm
Posts: 6291
Location: So California
Car Model: 64 Plymouth Valiant
Larger tires may hurt.......

There's the previously mentioned higher weight....

But with the lower gearing you may end up putting the carb into the power (rich) circuit when accelerating and burn up more fuel............

_________________
Ed
64 Valiant 225 / 904 / 42:1 manual steering / 9" drum brakes

8)


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 Post subject:
PostPosted: Fri May 05, 2006 4:27 am 
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Joined: Fri Nov 01, 2002 8:20 pm
Posts: 1603
Location: Oxford, Georgia
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Quote:
Again considering gas prices, it might be as cheap to put in an overdrive (assuming it's possible to find one) as to find and buy 5 rims. Thanks
The only factory overdrive paired with a slant six was a '70s era version of the A-833. If you don't have a factory 4-speed, you will need to modify your transmission tunnel to install one.

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"Mad Scientist" Matt Cramer
'66 Dart - turbocharged 225
My blog - Mad Scientist Matt's Lair


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 Post subject:
PostPosted: Fri May 05, 2006 7:36 am 
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Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24556
Location: North America
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Quote:
What you describe sounds more like understeer than oversteer.
I've never seemed to get that right. Every time I think I have it, I have it wrong.
It's easy: Understeer is when you hit the wall with the front of the car. Oversteer is when you hit the wall with the back of the car. :shock:

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Too many people who were born on third base actually believe they've hit a triple.

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 Post subject:
PostPosted: Fri May 05, 2006 9:09 am 
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Turbo Slant 6
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Joined: Tue May 02, 2006 12:16 am
Posts: 708
Location: Ooltewah, Tennessee
Car Model:
Quote:
Larger tires may hurt.......

There's the previously mentioned higher weight....

But with the lower gearing you may end up putting the carb into the power (rich) circuit when accelerating and burn up more fuel............
Hmm, I have no urban driving and I may have more interstate driving coming up. I guess to be certain I should perhaps double check the rear end ratio? Do you happen to know the bottom ratio on my 3 speed? Thanks.


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 Post subject:
PostPosted: Fri May 05, 2006 9:15 am 
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Turbo Slant 6
User avatar

Joined: Tue May 02, 2006 12:16 am
Posts: 708
Location: Ooltewah, Tennessee
Car Model:
Quote:
Quote:
Again considering gas prices, it might be as cheap to put in an overdrive (assuming it's possible to find one) as to find and buy 5 rims. Thanks
The only factory overdrive paired with a slant six was a '70s era version of the A-833. If you don't have a factory 4-speed, you will need to modify your transmission tunnel to install one.
The tunnels on the later A-bodies were larger? Giving room for either? Hmmm. I have one word for that. GACK!! Thanks for the heads up.


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 Post subject:
PostPosted: Fri May 05, 2006 9:25 am 
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Board Sponsor & Contributor

Joined: Thu Oct 31, 2002 5:39 pm
Posts: 24556
Location: North America
Car Model:
Quote:
The tunnels on the later A-bodies were larger?
Naw, the difference in the tunnel is floor shift vs. column shift. You have to add the floor shift "hump" if you're going from an automatic or a 3-on-the-tree to a 4-speed, because the 4-speeds are all floor-shifted. This isn't all that tough since there exist brand new shifter hump panels. They're intended for later cars, but can very easily be adapted to the earlier cars.

_________________
一期一会
Too many people who were born on third base actually believe they've hit a triple.

Image


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 Post subject:
PostPosted: Fri May 05, 2006 9:27 am 
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Turbo Slant 6
User avatar

Joined: Tue May 02, 2006 12:16 am
Posts: 708
Location: Ooltewah, Tennessee
Car Model:
Quote:
Quote:
Quote:
What you describe sounds more like understeer than oversteer.
I've never seemed to get that right. Every time I think I have it, I have it wrong.
It's easy: Understeer is when you hit the wall with the front of the car. Oversteer is when you hit the wall with the back of the car. :shock:
Then I had it right. The radials seem to pull me into a sharper and sharper turn quicker compared to bias. With the bias plies it tended to stay on radius easier.

Mind you, I'm not talking race conditions. Just hills and curves. Thanks.


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