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Topic: Sporty Cars

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Cincydawg

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Re: Sporty Cars
« Reply #518 on: June 03, 2020, 08:20:18 AM »
The tires are a giveaway, cars in the 60s didn't have tires like that, profile and width.

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FearlessF

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Re: Sporty Cars
« Reply #519 on: June 03, 2020, 10:16:37 AM »
well IMO, tires can be upgraded on original cars w/o causing a problem with the originality

trying to find a set of tires from the 60s that are still road worthy is near impossible
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Cincydawg

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Re: Sporty Cars
« Reply #520 on: June 03, 2020, 10:18:45 AM »
To be  truly original, you need the original wheels, and that means trouble fitting modern tires.  And they do make tires for older vehicles, they are expensive.  It's a way to spot a resto-mod versus a numbers matching true original.

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FearlessF

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Re: Sporty Cars
« Reply #521 on: June 03, 2020, 10:19:11 AM »
speaking of tires.............

https://www.corvetteblogger.com/2020/06/02/video-2020-corvette-stingray-with-drag-radials-runs-10-922-in-the-quarter-mile/

Prior to the arrival of the mid-engine Corvette Stingray, previous owners had to rely on huge horsepower aka the 2019 ZR1 or the C7 Z06 to claim it’s a 10-second car. According to this video from Andrew at Complete Street Performance, now all you need is a C8 Corvette Stingray Z51 Coupe and a set of drag radials.


Andrew was at Cecil County Dragway in Rising Sun, Maryland where a Sebring Orange 2020 Corvette Stingray was waiting for a day of fast passes. The Stingray’s only modification is said to be a set of drag tires. On his first pass, he runs 10.922 at 125.95 mph! How’s that for a boost in confidence!


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FearlessF

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Re: Sporty Cars
« Reply #522 on: June 03, 2020, 10:20:48 AM »
Quote from: Cincydawg on June 03, 2020, 10:18:45 AM
To be  truly original, you need the original wheels, and that means trouble fitting modern tires.  And they do make tires for older vehicles, they are expensive.  It's a way to spot a resto-mod versus a numbers matching true original.


agreed, I've seen this on the barrett-jackson auctions
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Cincydawg

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Re: Sporty Cars
« Reply #523 on: June 03, 2020, 10:21:08 AM »
Yeah, drag radials, or "slicks" are wonderments, but not street legal of course, no tread.

He probably had a sticky surface as well and did a preburnout.
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FearlessF

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Re: Sporty Cars
« Reply #524 on: June 03, 2020, 10:23:41 AM »
well, Andrew was at the Cecil County Dragway
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CWSooner

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Re: Sporty Cars
« Reply #525 on: June 03, 2020, 10:30:41 AM »
Well those are certainly modern tires.  But how much wider they are than the originals, I don't know.  Here's an original in the pits.  Those front tires don't look much, if any, skinnier than the ones on the replica.  But it is tough to tell for sure.





The back tires are obviously wider than the fronts, but that was the case on the original too, just as it was the case on the 289 Cobra roadster, to which the Daytona Coupe was mechanically identical.

Here's an original at a show in 2010.


The rear tires don't look quite as wide.

In any event, though, if one of the originals were being driven at speed, I imagine it would have modern tires on it rather than 1965 Goodyears.
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Cincydawg

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Re: Sporty Cars
« Reply #526 on: June 03, 2020, 10:32:49 AM »
It's not the width I spotted, it was the profile.  That is clearly different.

Standard tire size for 1964 Ford GT40 Mk I (prototype):
(in case of different tires in front and rear the dimensional data are valid for driving or rear wheels)

Standard tire size:9.75 - 15 (F); 12.8 - 15 (R)
Tire width (mm):325
Tire sidewall factor:60
Rim size (in):15
Total wheel diameter (mm / in):771 / 30.4


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Cincydawg

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Re: Sporty Cars
« Reply #527 on: June 03, 2020, 10:38:11 AM »
Those were ultra sporty tires in 1964.

I know a Corvette in not in that class, but this is its tire size in 1964:

1964 Chevrolet Corvette Coupe

The notable change is in wheel diameter and accompanying drop in profile.  The actual rolling diameter stays about the same (not too far off).

You just have less "rubber" showing.


Tires By Vehicle By Size By Diameter
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CWSooner

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Re: Sporty Cars
« Reply #528 on: June 03, 2020, 10:41:04 AM »
The GT40's specs say a 60 profile on the rear tires.  What do you think the modern tires look like--a 50 profile?

Here's a Daytona racing at the "HSR Historicals" in 2009.  I think it's an original, but it definitely has modern tires.

[img width=500 height=332.997]https://upload.wikimedia.org/wikipedia/commons/thumb/8/81/Shelbydaytonacoupe.JPG/1280px-Shelbydaytonacoupe.JPG[/img]
« Last Edit: June 03, 2020, 10:48:53 AM by CWSooner »
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FearlessF

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Re: Sporty Cars
« Reply #529 on: June 03, 2020, 10:41:08 AM »
less sidewall to fold in a corner
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Cincydawg

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Re: Sporty Cars
« Reply #530 on: June 03, 2020, 10:58:10 AM »
The wife's Cadillac had 35 profile tires on it.  A four door sedan with a 4 cylinder engine.  35.

They were a real problem, one reason I traded the car.

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CWSooner

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Re: Sporty Cars
« Reply #531 on: June 03, 2020, 11:28:25 AM »
My Boss 302 Mustang has fat tires.  Front: P255/40R19; rear: P285/35R19.
The factory tires for my 1967 289-4V Mustang were not fat.  Or low-profile.  195/75x14.
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