RE: Tire's pressure ? - 2/3/2008 7:46:42 PM
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DeeVeeEight
Posts: 471
Joined: 10/24/2007
From: South Jersey
Status: offline
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 quote:
ORIGINAL: aldous
Hi ,
doubts about tires' pressure
bought these goodyear eagle GT+4 255/60/15 . OK , there's better stuff on the market, but the availability of tires with white letters here is quite difficult ( and price was fair for my tires)
can't find any spec about correct pressure ( nothing written on the tire itself and nothing on the Goodyear website). So I'm referring to my car's specs on the door. But I suppose that I'm making mistakes with the pressure choice.
Help please
Aldo
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Thumbnail Image
44 PSI
Performance Category:
High Performance All-Season
Size
Service Description
Load Rating
UTQG
Max
Load
Max.
Inflation
Press.
Tread
Depth
Tire
Weight
Rim
Width
Range
Meas.
Rim
Width
Sect.
Width
Tread
Width
Overall
Diam.
Revs
Per
Mile
Size
Service Description
Load Rating
UTQG
Max
Load
Max.
Inflation
Press.
Tread
Depth
Tire
Weight
Rim
Width
Range
Meas.
Rim
Width
Sect.
Width
Tread
Width
Overall
Diam.
Revs
Per
Mile
225/55VR16
Load Index 94 = 1477lbs (670kg) per tire
Speed Rating “V” = 149mph (240kph) 94V SL
Treadwear: 240
Traction: A
Temperature: A240 A A
1477 lbs.
44 psi
11/32"
24 lbs.
6-9"
7"
9.2"
8.2"
25.8"
807
NOTE: Specifications shown are as accurate as possible based on the information provided to us by the tire manufacturers. The dimensions reflect average values for tires measured on the specified measuring rim width. Individual tires may vary from data shown.
All tires are subject to continuous development. The tire manufacturers and The Tire Rack reserve the right to change product specifications at any time without notice or obligation.
If you have a specific concern please email sales@tirerack.com.
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RE: Tire's pressure ? - 2/3/2008 7:53:36 PM
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DeeVeeEight
Posts: 471
Joined: 10/24/2007
From: South Jersey
Status: offline
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quote:
ORIGINAL: aldous
Hi Texas Jim,
yesterday my mechanic put in place the new spark plugs. The old sparks were OK , the problem was : 2-3 were slightly loose ( those that are more difficult to reach ). Infact I supposed that something was wrong with sparks.
Oh my god , what a difference with new sparks! Above all at low-mid rpm. now my engine runs so smooth...It desn't smoke anymore and I'm sure that the gas consumption will be improved ( good). less noise too. Instead I don't see a great difference at high RPM : but I must probably go for a larger air cleaner ( now mine is 10"), to have more air flow when the carb demands .
before replacing the last spark plug , my mech measured the compression ratio. He had some difficulties in keeping firmly the meter in the spark's hole ( due to high pressure) so we supposed that the actual compression ratio is slightly more than the value measured : we have measured 9:1 . But we think it should be about 9,2:1 . Does this value tell something to you about my engine HP?
power steering . I hear a hissing noise in the play position ( with engine OFF) coming from the control valve. No noise if I go over the play position.
I have checked the gear box watching it through the engine bay( from above) : I see the shafts and levers moving without any play there
Set all the 4 tires at high pressure too
thanks
Aldo
383 Crate motor - origin unknown - I think it is safe to assume a 9.5:1 compression ratio, that's pretty standard for a crate 383 that runs on pump gas.
_____________________________
If you don't ask, you get the same answer as no.
1979 L-82, 383 Stroker, Edelbrock RPM Air Gap intake, Holley 750, Headers, Flowmasters, VB&P 400# rear monospring, Richmond 5 speed. American Racing Vector Wheels, Firestone Indy 500's
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RE: Tire's pressure ? - 2/3/2008 7:56:35 PM
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73shark
Posts: 1057
Joined: 4/18/2006
Status: offline
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44 psi is the max pressure rating for the tire.
_____________________________
So many toys, so little time
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RE: Tire's pressure ? - 2/3/2008 8:04:50 PM
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C3 Starship
Posts: 4696
Joined: 7/25/2006
Status: offline
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So, DV8. Ya got any tire info? 
Great post. 
_____________________________
1980 L-82 Fastback (forward too)
Mono composite front and rear.
Full adjust ride height and
response.
400+ hp, 454, M-22, 3.07
http://i121.photobucket.com/albums/o225/C3Starship/Patch.jpg
2007 H. D. Sportster, XL 883 EFI
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RE: Tire's pressure ? - 2/9/2008 5:59:33 PM
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Texas Jim
Posts: 422
Joined: 12/15/2005
Status: offline
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DeeVee,
Is the Max pressure for the GTplus4 44psi for the 225/55VR16 only or for all GTplus4s reguardless of the size?
If it's 44psi for the 60/15, I'll be calling Shine Bros. and blowing out the guy who gave me the "wack" info.
I went to "Tire Rack" which I'm familiar with but only see the 225/55VR16, like you posted. When I clicked on "specs" I got only the one size. Aldo's tire is a 255/60/15.
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RE: Tire's pressure ? - 2/9/2008 6:14:21 PM
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DeeVeeEight
Posts: 471
Joined: 10/24/2007
From: South Jersey
Status: offline
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My Goodyear GT II's were 44 PSI as are my Firestone Firehawk Indy 500's - both are 255/60/15's. I agree with Texas Jim's comment on that being the only size posted on Tire Rack, so I did make an "assumption" based on that information as well as my experience with my own tires.
Now I fully expect that you guys will give me the Benny Hill version of what an assumption is.....
_____________________________
If you don't ask, you get the same answer as no.
1979 L-82, 383 Stroker, Edelbrock RPM Air Gap intake, Holley 750, Headers, Flowmasters, VB&P 400# rear monospring, Richmond 5 speed. American Racing Vector Wheels, Firestone Indy 500's
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Printable Version
Didn't know that it originated w/ Benny Hill tho. Learn something new everyday. 
