What psi are you guys running your tires at? - The 1947 - Present Chevrolet & GMC Truck Message Board Network

TIMSPEED · 11-30-2003, 07:05 AM

On my 255/55 17's, I'm currently running them at 25psi (cold) all around...should I raise it to 30psi? 35psi? The entire weight of my truck with a FULL tank of gas is 3620 and the load rating for each TIRE is 1875lbs...so..

apstguy · 11-30-2003, 05:00 PM

32-34 is standard. Running it at 25 can cause loss of fuel economy and can cause the tire to overheat.

TIMSPEED · 11-30-2003, 06:15 PM

I shall raise them up to 32psi then...see if I can't score 12mpg...of course, at that higher tire pressure it's gonna be HARD to get traction AT ALL!

MylilBowTie · 12-01-2003, 05:38 AM

Its called "feathering" Tim

TIMSPEED · 12-01-2003, 06:56 AM

Quote:

Originally posted by MylilBowTie
Its called "feathering" Tim

With 4.10's and a tight carb setting, it's called "VHT"

bigblock73 · 12-01-2003, 08:53 AM

Quote:

Originally posted by Riptide's 78p/u
go with whats imprinted on the side wall, usually around 30 psi. thats where I got my 295 50's and 245 60's

every auto teacher, tire shop employee, and auto enthuisast I have met have always told me to go by the vehicle reccomendations, NOT the tire specs. With that being said, I usually stay between 30-35 psi no matter what the weather is.

low 84 · 12-01-2003, 01:13 PM

the pressure inprinted on the side wall is the maximum pressure for the tire. i wouldn't use this pressure unless you are at the maximum load rating of the tire also

87 STEPPER · 12-01-2003, 03:31 PM

I have allways run mine @ 35 psi.

**old Rusty C10** · 12-01-2003, 10:55 PM

i run regular 15 inch tires on my truck and i keep em at 35lbs as per the sidewall guidelines

BaggedC10 · 12-01-2003, 11:16 PM

33-psi here.

TIMSPEED · 12-01-2003, 11:29 PM

Quote:

Originally posted by BaggedC10
33-psi here.

DAYUM! LoL, this is gonna be funny...When my tires are at full 33psi, I'm gonna be smokin em' for a mile!

ItsNotABlazer · 12-01-2003, 11:52 PM

Right around 32-35 for me most of the time. I know what you mean about traction........my 94 Z28 has pretty much every bolt on that can be done to it, 6 speed trans, radial tires and 4.10 gears......my best 60' was a 2.2 lol. My 87 GN I had had a best 60' of 1.79 on ET Streets and about 5-7 lbs of boost at launch.

Brad

crackajacka · 12-02-2003, 06:28 PM

is that 35psi hot or cold?

*1FaastC10* · 12-02-2003, 07:43 PM

Quote:

Originally posted by ItsNotABlazer
Right around 32-35 for me most of the time. I know what you mean about traction........my 94 Z28 has pretty much every bolt on that can be done to it, 6 speed trans, radial tires and 4.10 gears......my best 60' was a 2.2 lol. My 87 GN I had had a best 60' of 1.79 on ET Streets and about 5-7 lbs of boost at launch.

Brad

drop the pressure at the track, i'll bet you money that your 60' improves.

ItsNotABlazer · 12-03-2003, 11:24 AM

I would kinda doubt it with radials and that much power and 4.10 gears. I thought about putting some et streets on it but the weak link (rear end) would show up then I am sure and I do not have the money for a good 12 bolt right now lol. The car ran a 13.2 witha 60' of 2.2 but the MPH was 107 so it was coming on strong once it did hook. This was also on a 100+ degree day. It should be a solid mid 12 car with some decent tires. If I ever get the money for the 12 bolt it will definitely get a little giggle gas.

Brad

LOHRTBT · 12-03-2003, 11:46 AM

Non Driver!!

j/k
lol.. I used to cut high 1.8's and constant 1.9's and 2.0's on stock rubber on my 95 Formula(M6) and all the other guys cars in the club hehe.
5-7 lbs of boost only?? you scared??? hahahaha I used to leave the line in our GN at 25 lbs of boost LOL. cut 1.5's hehehe

LOHRTBT · 12-03-2003, 11:58 AM

Oh yeah.... I run right at the tire max pressure
not the seating pressure...but max running pressure..to protect the wheels in case of holes in the road!

arveetek · 12-03-2003, 12:48 PM

I run 65 psi in the front and rear when unloaded, 75 psi in front and 80 psi in the rear when hauling my trailer.

Oh yeah, I'm running 16" 10 ply TRUCK

tires!!

jimfulco · 12-05-2003, 02:22 AM

79 Sub, 255/70-15 TA's @ 36# all around.

ItsNotABlazer · 12-05-2003, 10:37 AM

Actually Dave I have only had the Z28 to the track once so far. I went to SLP customer appreciation day back in March (I think it was) held at Texas Motorplex. Lets just say track conditions were not optimum that day. Pretty chilly and windy........I think with some practice launching it I could get some 1.9's anyway on radials. The GN would not hold any more than 5-6 lbs of boost off the line. Previous owner of it had went a 7.7 in the 1/8th......my best with a leaky header was a 8.5ish......plus I outweighed previous owner by 100 lbs probably so theres a .10 loss right there.

It used to belong to a guy who worked for Bennett Racing in Alabama. I bought it from the guy who got it from him. I thought it was kinda odd someone like Bennett racing employee having something besides a Mudstain.

Brad

LOHRTBT · 12-05-2003, 10:59 AM

Quote:

Originally posted by ItsNotABlazer
Actually Dave I have only had the Z28 to the track once so far. I went to SLP customer appreciation day back in March (I think it was) held at Texas Motorplex. Lets just say track conditions were not optimum that day. Pretty chilly and windy........I think with some practice launching it I could get some 1.9's anyway on radials. The GN would not hold any more than 5-6 lbs of boost off the line. Previous owner of it had went a 7.7 in the 1/8th......my best with a leaky header was a 8.5ish......plus I outweighed previous owner by 100 lbs probably so theres a .10 loss right there. It used to belong to a guy who worked for Bennett Racing in Alabama. I bought it from the guy who got it from him. I thought it was kinda odd someone like Bennett racing employee having something besides a Mudstain.

Brad

Cool!!

Post up some new #'s when you get em.

11-30-2003, 07:05 AM	#1
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	What psi are you guys running your tires at? On my 255/55 17's, I'm currently running them at 25psi (cold) all around...should I raise it to 30psi? 35psi? The entire weight of my truck with a FULL tank of gas is 3620 and the load rating for each TIRE is 1875lbs...so.. __________________ I have a few cars... See Them Here

11-30-2003, 05:00 PM	#2
apstguy LED King Join Date: Jan 2003 Location: Sacramento, CA Posts: 2,088	32-34 is standard. Running it at 25 can cause loss of fuel economy and can cause the tire to overheat. __________________ Tyler 1985 C10 305 w/ Bowtie OD TH700R4 3.42 LSD 202,000 miles 2006 Ford Focus ZX3 5-speed Stick 2016 Chevy Spark EV Gone: 2002.5 VW GTI 24v VR6 Gone: 2008 VW R32

11-30-2003, 06:15 PM	#3
TIMSPEED Join Date: Jan 2003 Location: Modesto, CA Posts: 1,321	I shall raise them up to 32psi then...see if I can't score 12mpg...of course, at that higher tire pressure it's gonna be HARD to get traction AT ALL! __________________ I have a few cars... See Them Here

12-01-2003, 05:38 AM	#4
MylilBowTie Right turn Clyde Join Date: Nov 2002 Location: Cincinnati, Ohio Posts: 2,911	Its called "feathering" Tim __________________ 1974 C25 LWB: 454 4bbl Carb / TH400 / 3.73 1992 Camaro RS 305 TBI

12-01-2003, 01:13 PM	#7
low 84 Registered User Join Date: Jan 2002 Location: Houston, TX Posts: 2,144	the pressure inprinted on the side wall is the maximum pressure for the tire. i wouldn't use this pressure unless you are at the maximum load rating of the tire also __________________ '51 F100, backhalf with a narrowed 9 and coil overs, 18.5" mickeys, monte front clip, +400" sbc in the works '05 1500 Crew Cab RIP '84 swb 5/7 drop, solid cammed 408 w/ fully ported dart heads, th350 w/ 10 inch hughes, 12 bolt w/ 3.73 richmonds and a locker '80 swb 4x4 in progress: 7" lift, 350 th350/np205, d44 and 1.5" ORD tie rod, 14BFF w/discs , armored diff covers, 40" MTR's

12-01-2003, 03:31 PM	#8
87 STEPPER STILL PLAYS WITH TRUX Join Date: Nov 2002 Location: Melbourne, Fla. Posts: 2,764	I have allways run mine @ 35 psi. __________________ ~~Bruce~~ MY 87 STEPPER MY 99 2D/WD TAHOE

12-01-2003, 10:55 PM	#9
old Rusty C10 Robert Olson Transport Join Date: Oct 2002 Location: recent transplant to NC USA Posts: 20,280	i run regular 15 inch tires on my truck and i keep em at 35lbs as per the sidewall guidelines __________________ Bob 1951 International running on a squarebody chassis "If a man's worth is judged by the people he associates himself with, then i am the richest man in the world knowing some of the fine people of this board" http://67-72chevytrucks.com/vboard/a...t.php?f=25&a=9 (you can review the site rules here!) PM Me for your vehicle/parts hauling needs in the North East US or see my Facebook page Robert Olson Transport Live each day to the fullest.. you never know when fate is going to pull the rug out from under you... I hate cancer!!

12-01-2003, 11:16 PM	#10
BaggedC10 Under construction! Join Date: Aug 2002 Location: NorCal Posts: 1,065	33-psi here. __________________ 2001 Silverado bagged on 22's. Sold

12-01-2003, 11:52 PM	#12
ItsNotABlazer The full convertible guy Join Date: Jul 2001 Location: Paris Texas Posts: 728	Right around 32-35 for me most of the time. I know what you mean about traction........my 94 Z28 has pretty much every bolt on that can be done to it, 6 speed trans, radial tires and 4.10 gears......my best 60' was a 2.2 lol. My 87 GN I had had a best 60' of 1.79 on ET Streets and about 5-7 lbs of boost at launch. Brad __________________ 2012 Kawasaki Vaquero (Lime Green) 2000 BMW 740iL 1995 Chevy ECSB riding on air 1975 GMC Jimmy 2WD lowered 4/6 1972 Chevy Trazer soon to be roadster 1965 Mustang 289/3 speed (friends dad bought it new) 1964 Chevy C10 (dad bought it new)

12-02-2003, 06:28 PM	#13
crackajacka Stylin Join Date: Sep 2001 Location: Tuttle, OK Posts: 620	is that 35psi hot or cold? __________________ Ive been traveling for some time, with my fishin pole and my bottle of shyne. Most Girls like finished products and just dont understand what a good addiction does for you http://www.paulwall.us/

12-03-2003, 11:24 AM	#15
ItsNotABlazer The full convertible guy Join Date: Jul 2001 Location: Paris Texas Posts: 728	I would kinda doubt it with radials and that much power and 4.10 gears. I thought about putting some et streets on it but the weak link (rear end) would show up then I am sure and I do not have the money for a good 12 bolt right now lol. The car ran a 13.2 witha 60' of 2.2 but the MPH was 107 so it was coming on strong once it did hook. This was also on a 100+ degree day. It should be a solid mid 12 car with some decent tires. If I ever get the money for the 12 bolt it will definitely get a little giggle gas. Brad __________________ 2012 Kawasaki Vaquero (Lime Green) 2000 BMW 740iL 1995 Chevy ECSB riding on air 1975 GMC Jimmy 2WD lowered 4/6 1972 Chevy Trazer soon to be roadster 1965 Mustang 289/3 speed (friends dad bought it new) 1964 Chevy C10 (dad bought it new)

12-03-2003, 11:46 AM	#16
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	Non Driver!! j/k lol.. I used to cut high 1.8's and constant 1.9's and 2.0's on stock rubber on my 95 Formula(M6) and all the other guys cars in the club hehe. 5-7 lbs of boost only?? you scared??? hahahaha I used to leave the line in our GN at 25 lbs of boost LOL. cut 1.5's hehehe __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

12-03-2003, 11:58 AM	#17
LOHRTBT BeWarE tHe eViL CrAnkTOe! Join Date: Oct 2002 Location: Yukon, OK Posts: 3,605	Oh yeah.... I run right at the tire max pressure not the seating pressure...but max running pressure..to protect the wheels in case of holes in the road! __________________ ~Dave~ You can call me Mike, Mike Oxlong - 1986 Chevy SWB - Stock for now - *1986 Chevy Custom SWB* *Stolen 6/26/05* - 1985 Chevy SWB SOLD - 1999 T/A Some mods www.cardomain.com/id/ramairdave AIM Screenname - Jester84

12-03-2003, 12:48 PM	#18
arveetek Ultimate Diesel Dude Join Date: Oct 2002 Location: Southwest Missouri Posts: 328	I run 65 psi in the front and rear when unloaded, 75 psi in front and 80 psi in the rear when hauling my trailer. Oh yeah, I'm running 16" 10 ply TRUCK tires!! __________________ Project truck: '81 C/20 converted to 6.2L TURBO DIESEL bored .040", gear drive, 6.5L injectors/pump, custom pistons, custom 4" exhaust, 700R4, 4.10's Daily Driver: '95 K1500 Tahoe, 6.5L TURBO DIESEL, NP241, 4L80E, 3.42's Last edited by arveetek; 12-03-2003 at 12:50 PM.

12-05-2003, 02:22 AM	#19
jimfulco Registered User Join Date: May 2003 Location: Shreveport LA Posts: 3,170	79 Sub, 255/70-15 TA's @ 36# all around.



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12-05-2003, 10:37 AM	#20
ItsNotABlazer The full convertible guy Join Date: Jul 2001 Location: Paris Texas Posts: 728	Actually Dave I have only had the Z28 to the track once so far. I went to SLP customer appreciation day back in March (I think it was) held at Texas Motorplex. Lets just say track conditions were not optimum that day. Pretty chilly and windy........I think with some practice launching it I could get some 1.9's anyway on radials. The GN would not hold any more than 5-6 lbs of boost off the line. Previous owner of it had went a 7.7 in the 1/8th......my best with a leaky header was a 8.5ish......plus I outweighed previous owner by 100 lbs probably so theres a .10 loss right there. It used to belong to a guy who worked for Bennett Racing in Alabama. I bought it from the guy who got it from him. I thought it was kinda odd someone like Bennett racing employee having something besides a Mudstain. Brad __________________ 2012 Kawasaki Vaquero (Lime Green) 2000 BMW 740iL 1995 Chevy ECSB riding on air 1975 GMC Jimmy 2WD lowered 4/6 1972 Chevy Trazer soon to be roadster 1965 Mustang 289/3 speed (friends dad bought it new) 1964 Chevy C10 (dad bought it new)

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