tire pressure

dayaftertomorro · 11-01-2009, 12:22 AM

what is the proper tires pressures for the front and the rear? I have 36psi front and 35 psi rear

griffojm · 11-01-2009, 12:24 AM

I think the door jamb calls for 30 psi front and 32 psi rear.

amadeus303 · 11-01-2009, 12:35 AM

As griffojm pointed out, you can get the factory recommended specs in the door jamb. You can run a bigger difference between front and rear than the 1 psi you're currently using. Personally, I also run higher psi in the front... there's more weight over the front wheels. I tried different settings, and I've found that i like 35/32 (f/r) on my summer setup, and 34/32 in my winter setup.

dayaftertomorro · 11-01-2009, 12:52 AM

Before I have them manufacture setting, I can only get 29miles per gal and after I change to 36F,35R, I get 33 miles/gal

TSX_WS · 11-01-2009, 01:34 AM

Higher pressure reduces rolling resistance and raises MPG. I remember I brought my stock tires to ~45 PSI and mpg grew by 2-4. I now run really soft tires and MPG plummeted

I had to raise the pressure to 40 psi in the front and 35 in the back. It seemed to help a bit.

808havok_tsx · 11-01-2009, 02:37 AM

manufacturer's recommended psi is 32F/30R.

i like to put mine at 37F/35R. i found the recommended psi too soft and turning the steering wheel at slow speeds was a chore.

once i upgrade the suspension, i'll probably lower the psi...

griffojm · 11-01-2009, 12:57 PM

Raising the tire pressure too much reduces the amount of tread hitting the road (contact patch). This reduces your car's handling ability, so its not recommended. It does increase fuel economy by reducing rolling resistance like TSX WS said.

IMHO, 3 mpg < safety.

cYn · 11-01-2009, 04:13 PM

Yea I think Acura's recommendation is really low. So I pump it to 36 all around and I also get better MPG out of it also. Also, increasing the tire pressure just 3-4 more psi does not make a major difference in handling. Of course, if it's over 40 psi then that is too much. Keep it in the 30-38 range and you'll be fine.

dayaftertomorro · 11-02-2009, 01:11 AM

My car has a shorter brake distance with higher psi than the recommended psi

newapocalypse · 11-02-2009, 08:19 AM

Quote:

Originally Posted by griffojm

Raising the tire pressure too much reduces the amount of tread hitting the road (contact patch). This reduces your car's handling ability, so its not recommended. It does increase fuel economy by reducing rolling resistance like TSX WS said.

IMHO, 3 mpg < safety.

+1, the manufacturer didnt just set a random psi for the car. They take into consideration the safety above all, contact with the road, and MPG, and even treadwear. Sporting higher tire pressure causes less contact with the road as mentioned before, which causes bad tire wear. Out of all things you should not be setting tire pressures just for MPG...

losothefatso · 11-02-2009, 06:11 PM

I agree with safety > mpg. I personally didn't even notice a huge MPG difference when I had it 38F/36R compare to my summer 34F/32R, at most 1mpg and that's being really optimistic. Since it's getting extremely cold in Seattle I have mine at 36F 35/34R depending on how cold it is outside.