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#1 | ||
Regular Member
Join Date: Dec 2004
Posts: 228
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What tyre pressure should I run in my street tyres when I go the track?
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#2 | ||
DPC PERFORMANCE Race prep
Join Date: May 2005
Location: Bundoora Victoria
Posts: 3,379
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Depends on what tyres you have, on a street tyre you would be safe with 36 psi as a base pressure do a couple of laps then come in and check pressure again while hot staying close to or under 40 psi this is for circuit racing
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#3 | ||
NO CARBON TAX
Join Date: Feb 2005
Location: st clair NSW
Posts: 624
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take cheap pump with ya and drop to 20psi max. ideal about 15 imo
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#4 | ||
FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Pit Lane
Posts: 11,867
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It depends on whether your talking strip or track
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#5 | ||
DPC PERFORMANCE Race prep
Join Date: May 2005
Location: Bundoora Victoria
Posts: 3,379
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also dont you spell tire as tyre
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#6 | |||
Boosted TQE FTW
Join Date: Jan 2005
Location: Perth
Posts: 254
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Quote:
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#7 | |||
FF.Com.Au Hardcore
Join Date: Feb 2005
Location: Pit Lane
Posts: 11,867
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Quote:
Good point. but I found it under new posts, not the drag racing section that's my excuse and i'm sticking to it ![]() |
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#8 | ||
Regular Member
Join Date: Dec 2004
Posts: 228
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Um strip
![]() Couple of laps? ![]() They are not great tyres (very hard compound) 235/60/15 hankook dynamic ![]()
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#9 | ||
.
Join Date: Dec 2004
Location: Bundoora
Posts: 7,199
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Everyone I've talked to has kept their street tyres at normal pressures...ie with 18's 38psi or so will be fine
Some people have tried lower psi's into the low 20's but it slows down mph and the harder sidewalls of street tyres wont expand out enough as per drag tyres to get the grip without losing roll |
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#10 | ||
Who's your Daddy now
Join Date: May 2005
Posts: 385
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If your going to run street tyers 25 is good if your wheel spinning drop them a bit more. wouldn't go lower than 20 though.
If they are a hard compound as u say do a nice burn out get them hot and sticky.
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#11 | |||
Now a FG XR8 in Nitro
Join Date: Dec 2004
Location: Sydney
Posts: 550
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Quote:
I reckon you're right legend, the low pressures could be preventing these powerful cars getting higher speeds although they get a decent launch. I was with Chris and Wade last Wednesday night the WSID. Chris just had no grip where Wade did have. Wade got a great time in the end due to a good launch, his mph was down though. His tyre pressures were very low, if this was the reason for his lowish mph it would have also hindered his ET to a point. When I was karting we would run low pressures but was told that if they were too low it would prevent a higher speed at the end of the straight, thus more time was spent reaching that point. I suppose a little test would be to try and push you car yourself with different pressures, come to a compromise between pressure and effort to push. If you're finding it hard to push you car I'm thinking your engine would suffer as well somewhere in the equation.
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#12 | ||
Its yellow, NOT green!
Join Date: Feb 2005
Location: Hunter Valley
Posts: 1,219
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I think it also depends how likely your car is to loose traction. With my stock EL XR8 its not worth lowering tyre pressures because I don't have enough power to have traction problems.
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#13 | ||
Regular Member
Join Date: Dec 2004
Posts: 228
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Normal tyre pressure it is! :eclipsee_
Thanks
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#14 | |||
Now a FG XR8 in Nitro
Join Date: Dec 2004
Location: Sydney
Posts: 550
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Quote:
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#15 | ||
.
Join Date: Dec 2004
Location: Bundoora
Posts: 7,199
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Definately have high pressures in the front too, the less rolling resistance the better
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#16 | ||
X-Series Club Moderator
Join Date: Jan 2005
Location: Melbourne, VIC
Posts: 1,952
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Surely the type of tyre would have a large bearing on the most appropriate pressure, along with power output etc.
I was recommended 18psi in 235/60/14's, and maybe lower! Seemed low to me, around 25 is what I would've expected as a good starting point. If I run my normal wheels (17's) on the strip, i would just use normal pressure!
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