How Much PSI?
Moderator: John_Heard
- hugger73hatch
- Posts: 360
- Joined: Sun Oct 21, 2007 10:42 pm
How Much PSI?
Just wondering what everyone's thought is on psi in bias ply slicks. This past weekend was first time out this year and first time with Caltracs and split monos. I ran 18psi in a 28/9/15 MT ET drag. Never ran that much before. Just curious to see what everyone is running. Before the caltracs at this track I would normally have about 12 in them and still spin.
73 Nova Hatchback, 408 Small Block 13-1, Iron Heads, 6.972 @ 98.362, 1.468 60', 3450 lbs, still tuning
28 x 9 Slick, N/A
http://www.esquireservices.net
28 x 9 Slick, N/A
http://www.esquireservices.net
Re: How Much PSI?
In my car with 32/14/15 I run 9 psi. In the other car with 34.5/17/16 we run 5-3/4 to 6 psi.
- hugger73hatch
- Posts: 360
- Joined: Sun Oct 21, 2007 10:42 pm
Re: How Much PSI?
What do you find the benefit in running it that low? More consistency, better et, etc...just curious.
73 Nova Hatchback, 408 Small Block 13-1, Iron Heads, 6.972 @ 98.362, 1.468 60', 3450 lbs, still tuning
28 x 9 Slick, N/A
http://www.esquireservices.net
28 x 9 Slick, N/A
http://www.esquireservices.net
Re: How Much PSI?
With that size slick I would try 11-13 psi
Re: How Much PSI?
If I go any higher in pressure the slick just spins. I have no idea why we run so little in the big tires.
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- Posts: 238
- Joined: Thu Oct 12, 2006 1:12 pm
- Location: Colonial Beach VA If I am not at home or the track then I am probably at HOOTERS
Re: How Much PSI?
Hugger, I saw you at the beach sunday but didnt get a chance to ctach up with you and shoot the breeze. I usually have the best luck with my psi @ 11-11.5 psi. You may just have to keep fooling with it untill you find the sweet spot. Maybe on a friday night. Also the track wasnt very good sunday either. all my guys 60ft times were off by about 2-5. Your best bet is to hit MIR on a sunday for TnT that track is dead on on snday after friday nights and all day saturday racing.
74 chevy luv 355 sbc bracket car
70 Nova SS bracket / t.n.t car.
(Yes REAL SS 396 DISCS 12B0LT ETC)
WANTED DEAD OR ALIVE 68-74 NOVAS
TOO MUCH IS NOT ENOUGH!!!!!!!!!!!!!!!!
70 Nova SS bracket / t.n.t car.
(Yes REAL SS 396 DISCS 12B0LT ETC)
WANTED DEAD OR ALIVE 68-74 NOVAS
TOO MUCH IS NOT ENOUGH!!!!!!!!!!!!!!!!
Re: How Much PSI?
With 28x10.5 I ran 12.5-13 on my S10 with 1.38 60s. I have 2 passes on my 29.5x10.5 and I have been running 13 psi so far.
'87 S10 stock suspension, Caltracs, 9" rearend, 1.82 Glide, 383 SBC,
Brodix Track1 Heads, 14:1 compression, 180 shot plate,
2" tube Hussler Headers, 1.38 60ft., 6.20 ET 1/8th, 109 MPH,
Still Tuning, more to come.
Brodix Track1 Heads, 14:1 compression, 180 shot plate,
2" tube Hussler Headers, 1.38 60ft., 6.20 ET 1/8th, 109 MPH,
Still Tuning, more to come.
- hugger73hatch
- Posts: 360
- Joined: Sun Oct 21, 2007 10:42 pm
Re: How Much PSI?
Yeah I normally run pretty good at MIR, but I think they got bikes this weekend and I am planning on running in the all out qualifier the following weekend. Anybody ever been to a Super Chevy Show Test N Tune? They have one at VMP Friday, but I'm figuring a waste of time with the crowds.drummondracing wrote:Hugger, I saw you at the beach sunday but didnt get a chance to ctach up with you and shoot the breeze. I usually have the best luck with my psi @ 11-11.5 psi. You may just have to keep fooling with it untill you find the sweet spot. Maybe on a friday night. Also the track wasnt very good sunday either. all my guys 60ft times were off by about 2-5. Your best bet is to hit MIR on a sunday for TnT that track is dead on on snday after friday nights and all day saturday racing.
73 Nova Hatchback, 408 Small Block 13-1, Iron Heads, 6.972 @ 98.362, 1.468 60', 3450 lbs, still tuning
28 x 9 Slick, N/A
http://www.esquireservices.net
28 x 9 Slick, N/A
http://www.esquireservices.net
Re: How Much PSI?
i agree 11-11.5 is what i use i have the 10.5 w's tho
best to date N/A 8.91@153
psca westcoast heads up racing open comp
67 Camaro RS/SS
BBC Powerglide 4800 stall 4.11 29.5x10.5W
http://www.chpdragracing.com
psca westcoast heads up racing open comp
67 Camaro RS/SS
BBC Powerglide 4800 stall 4.11 29.5x10.5W
http://www.chpdragracing.com
Re: How Much PSI?
I run the same size @14psi.Run1.38-1.40 60ft and 9.86-9.90 in 1/4
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