My wife just bought a 1995 Camaro Z28.
It came with 275/40/17 Tires.
On the sidewall it says "Max Pressure 51 LBS".
All the tires were at about 35 LBS, so I put them all up to abot 40 LBS each.

I'm "Old School" and am familiar with the standard 32 PSI Max in a passenger car tire.
So when I saw 51 LBS I got a little spooked.

Any info/opinions would be welcome.
Roger

 

at DTC we put 35 in all the tires

 

would Z06 rims increase horsepower because they are so lightweight ?

 

Check for a sticker on the inside of the drivers side door, near where the locking mechanism is...the sticker should tell you what psi your tires should be at. Filling the tires any higher than the rated psi for the vehicle will cause unneeded wear on the tires, and possibly hurt your gas mileage.

For my '93, cold tire psi is 30 lbs.

 

I hope you're joking JaySan...think about what you said and tell me if it makes sense. Theoretically a lighter wheel could help acceleration and 1/4 miles times because they are lighter, but they deffinately don't "increase horsepower" That's like asking if a carbon fiber hood increases HP or if putting a "NOS" sticker on your car increases HP...sounds kinda ricer to me!

 

Damn 95slvrZ28, you telling me that after I went through all the trouble of punching holes in my NOS sticker to make it lighter, I won't see a HP increase? I am sending that sticker back right now.

 

35 PSI would be good for a street driven car.

 

power = work/time
work = force x distance
force = mass x acceleration
mass = weight/force of gravity

sorry to tell ya but a loss in weight will yeild higher horsepower

a wheel swap wouldn't be enough of a change to do much of anything, and combined with the fact that they are probably a bigger set of wheels , the smaller amount of sidewall will make your traction go down due to a loss of sidewall flex

 

ok, fine Nick, in a theoretical sense of the word, yes, a lighter weight could yeild an increase in "power." On the other hand, in the method that modern technology utilizes take the measurement of "power," what distance is being covered to attain that work? I will take this time to remind you that the "distance" in the equation for work denotes a distance from the origin of motion in a vector, therefore, as the wheel rotates once it has gotten back to it's origional rotational position, it has then done 0 work. Also, why don't we suggest that he get some 1inch wheels with a 4 series tire, because if we decrease the rotational inertia(moment of Inertia), the car will then be able to get the wheel spinning more easily, just as it would if we were to decrease the weight of the wheel to decrease inertia.

In either way, a lighter wheel may increase the horsepower of the motor in a neglegeble amount when it is measured at the wheel, but it will not change the HP the motor outputs at the flywheel or the crank.

 

this is what you just said




this is my head