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Goodyear Slick PSI ?
#1633982
06/15/14 02:18 PM
06/15/14 02:18 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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I am running the Goodyear 14-31-15 slicks on 15X15 rims. The car is about 2950 with driver. I called Goodyear and they said to run 6.5 to 7 psi. in the tires. I have run them as low as 8 psi and they handle OK on top end. It just sounds a little low @ 6.5 to 7 lbs. Anyone else run them that low at a comparrible weight? We are trying to improve the 60 ft. times. Mark 
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1633983
06/15/14 02:21 PM
06/15/14 02:21 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Re: Goodyear Slick PSI ?
[Re: Quicktree]
#1633984
06/15/14 03:01 PM
06/15/14 03:01 PM
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Joined: Sep 2003
Posts: 2,008
Sweet Home Alabama
MRMOPAR622
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Sweet Home Alabama
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If it dead hooks @ 8 lbs no need to go lower.The only reason to go lower is if its spinning the tires.As for 60' times they will always be better with as high of air pressure as you can run with out spinning the tires.
"To Be The Man'You Have Got To Beat The Man"
"T/D and Pro-Bracket Racer"
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Re: Goodyear Slick PSI ?
[Re: MRMOPAR622]
#1633986
06/15/14 03:12 PM
06/15/14 03:12 PM
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Joined: Aug 2003
Posts: 43,097
Bend,OR USA
Cab_Burge
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Bend,OR USA
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Quote:
If it dead hooks @ 8 lbs no need to go lower.The only reason to go lower is if its spinning the tires.As for 60' times they will always be better with as high of air pressure as you can run with out spinning the tires.
 I had a set of goodyear 16x33x15 on a set of 15 inch wide wheels, it would hook from 9.0 (I never tried higher) to 7.0 and o straight. I pulled them off, they where on the car before I bought it for over 6 yrs so I switch to a set of M/T 14x3`x15 stiff walls, I started of running them at 9.0 to 8.5 lbs, I have tried 12 lbs at the loacl track and it spun, I run 10.0 in them now on a bad track  I advise new racers to pump the tires up until it stars to spin and the 60 fts. slow down and then go the other way on lower pressure until it slows down, make your decsion on what you like 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: Goodyear Slick PSI ?
[Re: Quicktree]
#1633989
06/15/14 03:33 PM
06/15/14 03:33 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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Is this a converter and gearing issue, rather than tires? The converter is 3500 to 4,000 and the gear is 4.11. This is a street strip compromise. Mark
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Re: Goodyear Slick PSI ?
[Re: Cab_Burge]
#1633990
06/15/14 04:05 PM
06/15/14 04:05 PM
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Joined: Dec 2006
Posts: 2,102
Byron, NY
W.I.N. Racing
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Byron, NY
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Quote:
Quote:
I advise new racers to pump the tires up until it stars to spin and the 60 fts. slow down and then go the other way on lower pressure until it slows down, make your decsion on what you like
'01 P1500, Blown/Inj BAE,/Veney ,Bruno/CS2,Dana 60
'01 Dodge 3500 S Cummins Auto, Fresh air kit, 4" Exhaust,
'05 Dodge Magnum R/T - Too Much to list
'60 Willys CJ5
'01 International LPX - Project,DT466, Allison
'64 Plymouth Valiant, Inj 528 Hemi, 2spd
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Re: Goodyear Slick PSI ?
[Re: W.I.N. Racing]
#1633991
06/15/14 04:22 PM
06/15/14 04:22 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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This is pretty much what I have done. I started at 10 psi. It was spinning a lot. I had the car scaled because it was pulling right. First pass after scaling was at 9 psi was 1.40 60 ft. We went to 8 psi, after I talked to Goodyear last week and the 60 ft. dropped to 1.38. It doesn't seem to be spinning now, but I don't have the video in my possession yet to evaluate it. A minor jet change picked up the mph. I am not a chassis tuner at all. I am trying to get into the 5 second ET range. I guess I can just keep tuning the engine for more power? Mark
Last edited by Hemi Allstate; 06/15/14 04:47 PM.
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1633992
06/15/14 07:07 PM
06/15/14 07:07 PM
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Joined: Nov 2009
Posts: 3,410
Belpre,Ohio
CHAPPER
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Quote:
Well it seemed to hook the best it has so far, in the way it carried the front wheels up further down the track. But the 60 ft. is still not that good?
Tuning the engine is picking up the MPH but the 60 ft. doesn't seem to improve much.
Just a heads up,,,make SURE you are getting in the "tracks" or the "groove" at the starting line. Knowing your car from pics here, I imagine the rear is pretty narrow. You may be getting one wheel alittle bit off from run to run, causing the 60' to vary. DAMHIK
If you like drag racing, support your local track.
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1633993
06/15/14 07:51 PM
06/15/14 07:51 PM
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Joined: Jul 2006
Posts: 9,366
Lehigh Acres, Florida
rickstershemi
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Lehigh Acres, Florida
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Quote:
Is this a converter and gearing issue, rather than tires?
The converter is 3500 to 4,000 and the gear is 4.11. This is a street strip compromise.
Mark
IMO you need more stall 5k-6k and maybe 4.30's
Rickster
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Re: Goodyear Slick PSI ?
[Re: rickstershemi]
#1633994
06/15/14 08:10 PM
06/15/14 08:10 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Joined: Jan 2003
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Quote:
Quote:
Is this a converter and gearing issue, rather than tires?
The converter is 3500 to 4,000 and the gear is 4.11. This is a street strip compromise.
Mark
IMO you need more stall 5k-6k and maybe 4.30's
Rickster
stall way to low for a good 60'
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Re: Goodyear Slick PSI ?
[Re: CHAPPER]
#1633996
06/15/14 09:33 PM
06/15/14 09:33 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
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Mt. Vernon, Ohio
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Quote:
Quote:
Well it seemed to hook the best it has so far, in the way it carried the front wheels up further down the track. But the 60 ft. is still not that good?
Tuning the engine is picking up the MPH but the 60 ft. doesn't seem to improve much.
Just a heads up,,,make SURE you are getting in the "tracks" or the "groove" at the starting line. Knowing your car from pics here, I imagine the rear is pretty narrow. You may be getting one wheel alittle bit off from run to run, causing the 60' to vary. DAMHIK
I second that.
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Goodyear Slick PSI ?
[Re: dartman366]
#1633997
06/15/14 10:19 PM
06/15/14 10:19 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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Mt. Eden Ky.
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Quote:
Quote:
Quote:
Well it seemed to hook the best it has so far, in the way it carried the front wheels up further down the track. But the 60 ft. is still not that good?
Tuning the engine is picking up the MPH but the 60 ft. doesn't seem to improve much.
Just a heads up,,,make SURE you are getting in the "tracks" or the "groove" at the starting line. Knowing your car from pics here, I imagine the rear is pretty narrow. You may be getting one wheel alittle bit off from run to run, causing the 60' to vary. DAMHIK
I second that.
I know this is true, as it has already happened. The guy in the starting line booth has helped me the last two times out!  It is very much appreciated, as I seem to place the car poorly on my own!  
Thanks!!
Mark
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1633998
06/15/14 10:36 PM
06/15/14 10:36 PM
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Joined: Jan 2004
Posts: 13,247
Mt. Vernon, Ohio
dartman366
I Live Here
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Mt. Vernon, Ohio
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Quote:
Quote:
Quote:
Quote:
Well it seemed to hook the best it has so far, in the way it carried the front wheels up further down the track. But the 60 ft. is still not that good?
Tuning the engine is picking up the MPH but the 60 ft. doesn't seem to improve much.
Just a heads up,,,make SURE you are getting in the "tracks" or the "groove" at the starting line. Knowing your car from pics here, I imagine the rear is pretty narrow. You may be getting one wheel alittle bit off from run to run, causing the 60' to vary. DAMHIK
I second that.
I know this is true, as it has already happened. The guy in the starting line booth has helped me the last two times out! It is very much appreciated, as I seem to place the car poorly on my own!
Thanks!!
Mark
I run exactly the same slick and pretty equal weight and I found that on a well prepped track mine likes 12.5 psi but on a not so well prepped I have to reduce the pressure, I was at my home track and they usually aren't as well prepped especially on T@T night and my first pass @12.5 it spun some, my second I reduce pressure to 12.0 and that helped but needed to go down a little more, but I broke a tranny and wasn't able to accomplish that. 
Light travels faster than the speed of sound,,,this is why some people seem bright untill you hear them speak.
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Re: Goodyear Slick PSI ?
[Re: dartman366]
#1633999
06/15/14 11:28 PM
06/15/14 11:28 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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Sorry to hear about your tranny. I only run on T&T nights for now as the car is not dialed in and the driver is worse!  I guess right now I am just an "ET chaser". If I stay at these speeds I will of course have to get my license. From what you are telling me , it sounds like if my shocks were dialed in better, I could possibly run more air in the slicks? It really doesn't drive bad at all now. I am just happy that it is going straight ! Thanks! Mark
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Re: Goodyear Slick PSI ?
[Re: Quicktree]
#1634002
06/16/14 02:27 PM
06/16/14 02:27 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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So longer wouldn't have helped? I guess I need some tutoring!?!?!? I am glad this is just for fun! Mark
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1634003
06/16/14 06:20 PM
06/16/14 06:20 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Quote:
So longer wouldn't have helped?
I guess I need some tutoring!?!?!?
I am glad this is just for fun!
Mark
I doubt it, looked like it hooked to me. get a close up video of the right rear tire at launch.
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1634005
06/16/14 08:05 PM
06/16/14 08:05 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
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North, Alabama
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To get a better 60ft I think you need a lower gear and or more stall.
My D50 weights the same as yours with a pump gas small block and my best 60 has been a 1.33. It is 1.34 most of the time. Mine is stock leaf springs and home made caltrak bars, 4.56 gears , 5400 8 in.PTC convertor and 315/60 M/T Drag Radials.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1634006
06/16/14 08:09 PM
06/16/14 08:09 PM
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Joined: Jan 2003
Posts: 32,394
Quicktree
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Quote:
Mark
I doubt it, looked like it hooked to me. get a close up video of the right rear tire at launch.
Hmmmm........ I will try. Getting good video has been a problem.
I guess I was looking for the 60 ft time to be lower, given the ET and MPH ? So I guess it is making the ET we have, from the MPH, and not so much the 60 ft time?  It doesn't match the estimating programs, very well.
Mark
thats because your combo is off, start with the converter. thats what i would do
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Re: Goodyear Slick PSI ?
[Re: D-50]
#1634008
06/16/14 10:28 PM
06/16/14 10:28 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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Quote:
To get a better 60ft I think you need a lower gear and or more stall.
My D50 weights the same as yours with a pump gas small block and my best 60 has been a 1.33. It is 1.34 most of the time. Mine is stock leaf springs and home made caltrak bars, 4.56 gears , 5400 8 in.PTC convertor and 315/60 M/T Drag Radials.
I had PTC build the converter for the car. They had all the specs. I guess either they set it up for 1/4 mile, or the fact that I said street/ strip changed the plan. I thought it was a 4500 converter until I called them last week for a recommendation on launch RPM. When he looked at my order he said 3500-4000. I agree it could use more gear probably higher stall, but the engine is "mild" and probably making good torque at 4,000!?!?
Does your D50 have a trans brake? Do you spray it at launch?
Mark
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Re: Goodyear Slick PSI ?
[Re: Hemi Allstate]
#1634010
06/16/14 10:38 PM
06/16/14 10:38 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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Quote:
Quote:
To get a better 60ft I think you need a lower gear and or more stall.
My D50 weights the same as yours with a pump gas small block and my best 60 has been a 1.33. It is 1.34 most of the time. Mine is stock leaf springs and home made caltrak bars, 4.56 gears , 5400 8 in.PTC convertor and 315/60 M/T Drag Radials.
I had PTC build the converter for the car. They had all the specs. I guess either they set it up for 1/4 mile, or the fact that I said street/ strip changed the plan. I thought it was a 4500 converter until I called them last week for a recommendation on launch RPM. When he looked at my order he said 3500-4000. I agree it could use more gear probably higher stall, but the engine is "mild" and probably making good torque at 4,000!?!?
Does your D50 have a trans brake? Do you spray it at launch?
Mark
I am foot braking it and it is NA. I am thinking of spraying it in the near future.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Goodyear Slick PSI ?
[Re: Quicktree]
#1634011
06/16/14 10:56 PM
06/16/14 10:56 PM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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Quote:
I bet you put a 5600 8" converter in that thing and pick up at least a .10
That would be nice! Are you taking into consideration it is a 727 trans and not a Power Glide?
I just thought of something. When I ordered the converter I thought the car was going to be a lot lighter. I scewed the program!
Mark
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Re: Goodyear Slick PSI ?
[Re: Quicktree]
#1634013
06/17/14 09:50 AM
06/17/14 09:50 AM
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Joined: Mar 2006
Posts: 2,675
Mt. Eden Ky.
Hemi Allstate
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Quote:
I bet you put a 5600 8" converter in that thing and pick up at least a .10
I know that this is probably true, but I am not willing to put the time and money into a converter swap right now. I have some carb and intake combos I want to experiment with, to try and extract more power.
Changing the converter means laying on the floor. Changing the carbs and intake I can do standing!
I don't do the floor work so well these days. 
Mark
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And as you probably guessed no trans brake.
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