Tyre pressure???

[jaffa_cree]

What pressure should i set my tyres to?
They are 205/50/16.

My place i got my tyres from says 38psi, my mechanic says 32psi.
What is recommended?

[EG5[KRT]]

check ur tyre placard on ur car should b on drivers door end or on the body somewhere near the door striker on the body.should b around 36ish i reckon

[ctr kid]

i put 34!

[AMPERAGE]

I've always run 40psi in the dry and dropped it to 32psi in the wet. And 16psi at the drags. As long as you stay between 30psi - 40psi you can't really go wrong. Experiment a bit and see what feels the best for your driving style.

[tinkerbell]

Experiment a bit and see what feels the best for your driving style.

best advice,

but generally 50 series tyres need *a little* more air than the tyre placard says...

so start at around 35 psi COLD and see if it suits your style...

get you own tyre gauge and keep it in the car, as all servo tyre gauges read differently...

[Kerdze]

wot about 205/40r17? thanks in advance.

[tinkerbell]

40 profile should be closer to 40 psi COLD,

so start around 38 and work up from there...

ALSO - very important to monitor tyre WEAR if they are wearing too much on the outer edges - this means pressure too low, if it wears mroe in the middle - this means too much pressure...

ALSO - you should run a little more pressure in the fronts like 1-2 psi

[jaffa_cree]

Will give the fronts a go at 36 and the rears at 34 psi.
Thanks all

[shallot]

i use 33 psi for all the wheels

[xxxlude]

I use 50 p.s.i at the front and 38 p.s.i. in the rear, this is because i like a bit of Overstear and sharp Steering,not Recommended tho if you wont good brakeing Lol. in the wet i like to use 38 p.s.i and 28 p.s.i in the rear. but it depends on your driving style tho i like it sideway's. :p

[tinkerbell]

I use 50 p.s.i at the front and 38 p.s.i. in the rear, this is because i like a bit of Overstear and sharp Steering,not Recommended tho if you wont good brakeing Lol. in the wet i like to use 38 p.s.i and 28 p.s.i in the rear. but it depends on your driving style tho i like it sideway's. :p

are you for real?

lucky we all dont live in Newcastle then isnt it!!!

i hope you dont kill anyone... :thumbdwn:

luser.

[xxxlude]

Yes im for real Loser!!!

[TALEB TYRES]

tyre pressure can effect a car as much as the tyres you run!

normally for small cars/normal tyres you would use between 32-36 cold.
more for low profile's, at least 36.
however as others said, for every application there is different optimal pressures.
ie drag = lower psi is better
4wding = lower psi(this has been debated though, seems high pressure is good too!)

ie if someone wants to achieve a specific outcome, or are running an upsized package, then they would use such a high pressure, but this is only when you know about the effects and differences it causes on handling, traction so on...

oh last note, Dont drop your pressurres to 32-36 after a long drive, remember hot air increases pressure!

[SnoopDouggie]

Well for tyre pressues, I normally test mine when they are warm/hot, typically after comming home from work and driving for 20-30min. these pressures for my adrenlian RE001's were about 46psi which was close to 40-42 when cold, this was for the front, the rear was about 3psi less. at the track on the same tyres I had them on 50psi on the front. which was the max psi stated on the tyre
the reason I had the fronts so high was because i has getting heaps of wear on the outsides of my tyres, i 2 reasions, i like corners and my sussy is worn out and really soft.

Now with my new Nankang NS-2 tyres I have had to lower the front pressures to about 43psi because their max pressure is 44psi.

appart from that the tyres were fine. even with the front tyres at 46psi on the street, when i have locked up my tyres to avoid a stupid driver the flat spot i got did cover the whole tread face so it can't be over inflated all that much, and handling in the wet was fine.

[tinkerbell]

Now with my new Nankang NS-2 tyres I have had to lower the front pressures to about 43psi because their max pressure is 44psi.

appart from that the tyres were fine. even with the front tyres at 46psi on the street, when i have locked up my tyres to avoid a stupid driver the flat spot i got did cover the whole tread face so it can't be over inflated all that much, and handling in the wet was fine.


oh my god - anyone else wanna admit to stupid, foolish or reckless behaviour???

Snopdougie - where do you live?

EDIT - ah, surfers paridise - far far away from sydney!

[timizkool]

The mechanic I take my car to recommends 32psi but the tyre places reckon 40psi. To be on the safe side I usually pump it up to somewhere between
32-40 psi. Depending on your driving style it all comes down to trial and error. I tend to favour 36psi for normal driving and 38psi during spirited drives.
Mate.. as long as its neither under or overinflated it shouldnt make that much of a significant difference to the average joe

[SnoopDouggie]

[QUOTE=tinkerbell;1796645]oh my god - anyone else wanna admit to stupid, foolish or reckless behaviour???
QUOTE]

Why??
because it is a few psi over what is recommended on the tyre plackard?? you have to be kidding?

I slowly kept increasing the tyre pressures to try and get even wear on the tyres. I did it over period of at least a month trying each presure out.
If anything the handling would have been best at a hot temp of 44psi.
And the handling was actaully better at 46psi than 40psi which is recommended.
Bear in mind these are warm/hot readings. a 46psi reading on my pressure gauge equaited to about 42psi cold. and after 5 laps of a race track it was 50psi and still handling like a dream.

[tinkerbell]

oh my god - anyone else wanna admit to stupid, foolish or reckless behaviour???


Why??
because it is a few psi over what is recommended on the tyre plackard?? you have to be kidding?

10psi is a "few" psi?


even with the front tyres at 46psi on the street, when i have locked up my tyres to avoid a stupid driver the flat spot i got


anyone who flatspots a tyre on the street is either going WAYYY to fast or has incorrectly (and dangerously) under/over inflated tyres.


the flat spot i got did cover the whole tread face so it can't be over inflated all that much,

wow, amazing logic! cant argue with that...

[trism]

anyone who flatspots a tyre on the street is either going WAYYY to fast or has incorrectly (and dangerously) under/over inflated tyres.





umm, no.

[SnoopDouggie]

[QUOTE=tinkerbell;1796920]10psi is a "few" psi?
QUOTE]

Ok, on the 4th gen prelude the tyre plackard says for constant high speed driving inflate to about 40psi. now this is a cold pressue. my cold pressurs on the adrenlians were about 42psi, so 2psi over what honda recommends which is NOT a huge thing.
The hot tyre pressues of 50psi that I recorded at the track was from the same starting point of about 42psi. the reasion this rose so much was because of the soft compound and the fact that I was racing!. but yes this is high, but the actual wear on the tyres was good.

Alright for the lock up. I was going through a roundabout and some stupid driver did not give way and I forced jam on the breaks striaght away which resulted in a lock up. after I stopped I looked at the tyres and coud see a small wear spot/flat spot on the tyre from lockup. no this mark covered the whole tread area of tyre, thus when i locked up the whole tyre had good contact with the road, hence the pressure can't be too far off the right amount.

And for my Nankang NS2's with a max pressure rating of 44psi i actually have to have them below honda's tyre plackard rating for constant high speed driving.

Now I know that my tyres are over inflated a bit, but it is not at a dangerous or stupid level.

[[stealth]]

36 all round I use on stockies.....

[tinkerbell]

[QUOTE=tinkerbell;1796920]10psi is a "few" psi?
QUOTE]

Ok, on the 4th gen prelude the tyre plackard says for constant high speed driving inflate to about 40psi. now this is a cold pressue. my cold pressurs on the adrenlians were about 42psi, so 2psi over what honda recommends which is NOT a huge thing.
The hot tyre pressues of 50psi that I recorded at the track was from the same starting point of about 42psi. the reasion this rose so much was because of the soft compound and the fact that I was racing!. but yes this is high, but the actual wear on the tyres was good.

Alright for the lock up. I was going through a roundabout and some stupid driver did not give way and I forced jam on the breaks striaght away which resulted in a lock up. after I stopped I looked at the tyres and coud see a small wear spot/flat spot on the tyre from lockup. no this mark covered the whole tread area of tyre, thus when i locked up the whole tyre had good contact with the road, hence the pressure can't be too far off the right amount.

And for my Nankang NS2's with a max pressure rating of 44psi i actually have to have them below honda's tyre plackard rating for constant high speed driving.

Now I know that my tyres are over inflated a bit, but it is not at a dangerous or stupid level.

ok, so you are not that bad, but i still think that 46 psi on the street is too much for normal driving...

also maybe get your ABS checked if you are locking up your tyres when emergency braking...

[JDMWhore]

i only pretty much pump it to 32 psi, on occasion i'd pump it to 34 but i dont think i've ever gone over that..

[SnoopDouggie]

Well, on my Si model there is no ABS, only human abs which is sometimes faulty :)

And as I have been saying about the tyre pressure 46psi is what they heat up to, if you have never measured your hot tyre pressures I strongly advise it.
just measure the pressure before driving the car for the day, then go for a 30+min drive then measure the pressure again, now you will see that the pressure has increased quite a few psi.

[liman]

I recently lowered my car (change the springs only), still on stock rims, and keeps rubbing and scraping like mad, when I checked my tyre pressure, front 30psi, rear 32psi :zip:

So I put 40psi, much stiffer, much better handling, not as much rubbing and scraping, just need to get myself use to it.

[markoJEK1]

For cars with 50 + profile 36-38 is ideal, to increase fuel economy and tyre life, for 45 and lower profile 38-40, thats what I do at my workshop. Also remember, when you do want to check pressure / inflate tyres, dont do it after a drive, but before one, as tyres get hot, hot air expands, and it will give you a inaccurate psi when you look at it after a drive :thumbsup:

[tinkerbell]

if you have never measured your hot tyre pressures I strongly advise it.

i measured plenty of hot PSI yesterday, we did about 60 laps at Wakefield :thumbsup:

[migoreng]

5th gen prelude tyres...
i have the same size
i run 38 most of the time cause i like my handling to be more responsive.
34-36(220kpa?) is recommended on the tyre plate in the car i think.

i heard anything higher like low 40s and you will wear the middle out over time.

[markoJEK1]

^ yes, what you are referring to is over-inflation wearing, and same goes for the opposite, if the pressures are too low, you will get rounded sides - under inflation wearing, you want to try and make you tyre wear evenly

[xxxlude]

My Pop has a Toyota LandCrusher and the Tyre Recommend's 65 p.s.i. as a max.

[Terry_GT-R34]

I believe that this thread was started 2.5 years ago!
But, taking into account that the Q is still relevant to-day, I've tallied up all the recommendations and discarded all non-Preludes, and ended up with a 'cold' average of
"36.275 psi". That should fix it!
LOL

[tinkerbell]

sweet - now, can you fix global warming please?