Tire Pressure - Honda Prelude Forum

Shukuchi_SH · 02-10-2002, 06:57 PM

What's the perfect tire pressure you should have?
Currently all four of my tires are at 35psi. Is that normal?
How many psi you have on yours?
What's the right amount of air for good gas mileage? Ideal for racing and Casual driving?

Thanks!

5Gen_Prelude · 02-10-2002, 08:55 PM

It all depends on the tire size - stock is 32, my 215/40-17's are 35.

DaRawkus8 · 02-10-2002, 09:12 PM

Well, on my stock honda tires (Bridgestone 205's) I run 35 psi all around ..

EviLPenEviL · 02-11-2002, 01:13 AM

Quote:

Originally posted by DaRawkus8
Well, on my stock honda tires (Bridgestone 205's) I run 35 psi all around ..

Darth Luder · 02-11-2002, 06:41 AM

Please do not quote only post.

I ususally run 35 all around for just driving around town. Autoxing is a different story..

KentRagay · 02-11-2002, 06:52 AM

what would the ideal psi be for 225/40/zr18 tires (falken)?

Prelude1897 · 02-11-2002, 09:06 AM

Look in your door jam..It tells you everything on your car from the tire pressure to the color code of your car

shock · 02-11-2002, 02:04 PM

i recommend at least 1 or 2 psi over 32...the stock tires are a little too floppy for city driving at 32

Mz3silver · 02-11-2002, 02:42 PM

Quote:

Originally posted by shock
i recommend at least 1 or 2 psi over 32...the stock tires are a little too floppy for city driving at 32

Interesting.. I always wondered. I used to run 34-35psi and noticed uneven wear... Wore out more in the center than sides.. so back to 32 psi for now.

Anyone notice the same?

2kPreludeSH · 02-11-2002, 04:49 PM

I run about 33-35psi.

Mr Ludecrs · 02-11-2002, 04:59 PM

We've been running 32-35 depending on how stiff we want the ride. For everyday driving, we'll keep it at 32. If we know more enthusiastic driving is on the menu, then we up it. I've only autocrossed it once, but I believe I put the tire pressure up to near 40 all around for that.

I've noticed very slight uneven wear due to negative camber. We use to have the car REALLY low, but have raised it up a bit. Don't ask me how low it is, I have no idea. http://members.aol.com/onesi2nv/ludetracks2.jpeg for a pic

5Gen_Prelude · 02-11-2002, 10:17 PM

Quote:

Originally posted by Mz3silver

Interesting.. I always wondered. I used to run 34-35psi and noticed uneven wear... Wore out more in the center than sides.. so back to 32 psi for now.

Anyone notice the same?

Yup - and that's the exact sign of over-inflation. Wish I had taken a picture of my stocks - but suffice it to say, the last guy obviously overinflated the tires thinking that it would provide better all round grip. Truth is, overinflation decreases the contact patch - sure your sidewall is stiff - but you got less rubber on the road.

kenchan · 02-11-2002, 10:58 PM

215/45/17's 32 lbs. all around summer time. 34lbs winter.

dohcpower v2.0 · 02-11-2002, 11:05 PM

33-34 front, 34-36 rear.

TCB007 · 02-12-2002, 04:56 AM

..I'm running on 215/45ZR17 Dunlop SP Sport W-10s. I've been keeping them at 35-38psi cold! is that too high?

Darth Luder · 02-12-2002, 06:49 AM

Quote:

Originally posted by 5Gen_Prelude

Yup - and that's the exact sign of over-inflation. Wish I had taken a picture of my stocks - but suffice it to say, the last guy obviously overinflated the tires thinking that it would provide better all round grip. Truth is, overinflation decreases the contact patch - sure your sidewall is stiff - but you got less rubber on the road.

Actually, you flatten out your contact patch first. In order to really get the patch smaller, you have to be going into the upper 40's and 50's in tire pressure. If you drive faster than say highway speeds at all, then you are supposed to increase pressure for safety concerns.

16vdohc · 02-12-2002, 11:17 AM

I run my Yokohama parada 205/45-16 at 40 PSI because when you go to a lower profile tire (i.e. 45), you will need more pressure in the tire (because there is less air than say a 50 series tire) to hold the weight of the car up. Just something that I have heard.

5Gen_Prelude · 02-12-2002, 10:59 PM

Quote:

Originally posted by Darth Luder
Actually, you flatten out your contact patch first. In order to really get the patch smaller, you have to be going into the upper 40's and 50's in tire pressure. If you drive faster than say highway speeds at all, then you are supposed to increase pressure for safety concerns.

Actually no, even 5 psi will degrade your performance of your tires. And the highway deal is opposite (to a very small degree). The reason behind it is that your psi will increase if you are travelling for long distances. Why? The tires heat up and don't have time to cool down like normal. They will increase in psi by up to about 3 psi on long highway trips, thus over the recommended amount. Increase the tire presure for long highway drives simply compounds the problem.

Darth Luder · 02-13-2002, 11:31 AM

Quote:

Originally posted by 5Gen_Prelude

Actually no, even 5 psi will degrade your performance of your tires. And the highway deal is opposite (to a very small degree). The reason behind it is that your psi will increase if you are travelling for long distances. Why? The tires heat up and don't have time to cool down like normal. They will increase in psi by up to about 3 psi on long highway trips, thus over the recommended amount. Increase the tire presure for long highway drives simply compounds the problem.

Performance DOES go up when you increase tire pressure. It will flatten out the tire and change the slip angle of the tire. That is why when you are autoxing or road racing, you want higher pressures up front to get better grip up front than the rear to get some oversteer. I know about the pressure increase, but it happens everywhere, not just the highway. The increase in pressure is constant however and does not keep inflating once it reaches 3-5 psi. It will not go down until it cools down. Even the sun will keep the pressure up or increase pressure when sitting for a while.

The safety concerns with increasing pressure when you drive faster have to do with unseating and rolling over the tires. Its even printed in the owners manual if you want to double check.

5Gen_Prelude · 02-13-2002, 08:18 PM

When Autocrossing your speed is so much less than highway speeds, that's why it can help with cornering and such. For daily use, stick to the recommendations of the car manufacturer and in the case of after market tires/wheels, the tire manufacturer.

By the way, a higher than normal presure will increase the chance of a blow-out and decrease your braking ability as well, that to me is a big