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Re: when to put screws in the rims for slicks
[Re: cjs69mope]
#915342
01/27/11 11:20 PM
01/27/11 11:20 PM
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Joined: Jul 2004
Posts: 19,317
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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I run screws in every bias ply tire I run(havn`t tried radials yet)so as to keep the tire from slipping on the rim and to help keep the bead seated. No tubes EVER for me and they leak very little when it sits for a couple of weeks. Next step............bead locks; Can`t imagine the high hp 6-second cars NOT running screws or locks. 
Last edited by Thumperdart; 01/28/11 07:07 AM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: when to put screws in the rims for slicks
[Re: sam64]
#915344
01/27/11 11:44 PM
01/27/11 11:44 PM
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Joined: Jan 2003
Posts: 17,918
Akron, Ohio
ProSport
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 17,918
Akron, Ohio
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I quit running tubes years ago just because I had 2 valve stems rip off the tube and quickly lose air, could be dangerous. I think this happened because the hole in the wheel didn't properly line up with the valve stem on the tube.
I use Dawn dish soap and no tubes, and I use 8 screws on each side of the wheels. I saw a Mustang wreck many years ago from breaking a bead.
I've heard that running 16 screws on each side of each wheel will help stiffen the sidewall.
Also, I recently read that the screw should thread into the wheel, I didn't know that, the holes in my wheels have always been bigger than the screws so the screws just thread into the tire.
340Rick and Bobsprofab turned me onto a stainless screw that has a nice rounded head and uses a square drive bit, they look clean and can even be polished.
1970 Challenger, all aluminum 528 Hemi, HDK suspension, Tremec 5 speed manual
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Re: when to put screws in the rims for slicks
[Re: DaveRS23]
#915345
01/28/11 12:33 AM
01/28/11 12:33 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
I personally do not screw my rims since I stopped using tubes. Is there any reason anymore to screw the tires on unless you're running tubes?
If you have enough power and bite you can knock a bead out and the tire will go flat instantly. The lower the tire pressure the more likely this could happen-especially if you are "driving" the car. That's why faster NHRA cars are required to use beadlock wheels.
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Re: when to put screws in the rims for slicks
[Re: ProSport]
#915346
01/28/11 12:40 AM
01/28/11 12:40 AM
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Joined: Nov 2007
Posts: 1,600
Alberta Canada
StrokerAspen
top fuel
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top fuel
Joined: Nov 2007
Posts: 1,600
Alberta Canada
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Quote:
I've heard that running 16 screws on each side of each wheel will help stiffen the sidewall.
Also, I recently read that the screw should thread into the wheel, I didn't know that, the holes in my wheels have always been bigger than the screws so the screws just thread into the tire.
340Rick and Bobsprofab turned me onto a stainless screw that has a nice rounded head and uses a square drive bit, they look clean and can even be polished.
Running 16 screws each side probably acts like a stiffer sidewall because you are anchoring the tire to the wheel more often, and closer together. I have notices some of the higher powered small tire cars are running more screws.
That "Square bit" screw you speak of is a Canadian invention  It is called a "Robertson" Head. I really like them, much easier to use with out striping the head of the screw or the end of your bit.
-Kenny
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Re: when to put screws in the rims for slicks
[Re: ProSport]
#915348
01/28/11 12:43 AM
01/28/11 12:43 AM
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Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
rowin4
master
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master
Joined: Jun 2005
Posts: 6,257
gulfport, ms, west mi
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On new slicks I just soap them up with dawn soap and put them on, run them till the side walls are leaking air to the point that air is needed every day, then install the tubes. I prefer to screw them on. If the tubes are installed properly you won't rip out the stems. Use plenty of tire talc inside a dry clean slick, that means all the soap residue must be flushed out or your tube will stick and rip.  
it's ok to butt heads, just don't do it with a butthead
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Re: when to put screws in the rims for slicks
[Re: bigdad]
#915353
01/28/11 02:47 AM
01/28/11 02:47 AM
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Joined: Jun 2004
Posts: 2,360
Mobile Alabama
SB412DUSTER
top fuel
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top fuel
Joined: Jun 2004
Posts: 2,360
Mobile Alabama
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Quote:
Do they run screws in the rims in NASCAR ?
No they have inner-liners
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Re: when to put screws in the rims for slicks
[Re: SB412DUSTER]
#915354
01/28/11 02:52 AM
01/28/11 02:52 AM
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Joined: Feb 2004
Posts: 34,871
S.E. South Dakota !
bigdad
Still Posting A Lot
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Still Posting A Lot
Joined: Feb 2004
Posts: 34,871
S.E. South Dakota !
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Quote:
Quote:
Do they run screws in the rims in NASCAR ?
No they have inner-liners
This I know but, what keeps the tire on the bead ?
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Re: when to put screws in the rims for slicks
[Re: bigdad]
#915355
01/28/11 07:31 AM
01/28/11 07:31 AM
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Joined: Jan 2003
Posts: 32,394
Quicktree
I Win
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I Win
Joined: Jan 2003
Posts: 32,394
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Quote:
Quote:
Quote:
Do they run screws in the rims in NASCAR ?
No they have inner-liners
This I know but, what keeps the tire on the bead ?
ties are stiff sidewalls, not anywhere near what we run. they also run steel wheels.
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Re: when to put screws in the rims for slicks
[Re: Quicktree]
#915356
01/28/11 08:50 AM
01/28/11 08:50 AM
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Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY
Master
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Master
Joined: Jun 2003
Posts: 52,972
Romeo MI
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I have done it both ways... no screws and no tubes... I did mark the tire to the stem and mine moved all the time... thing was I never knew if it went a few inches or a few turns... then I switched over to running tubes and screws... this currant set up has yielded my best 60ft with a 1.19 and I think its the stiffer side wall....also I get more runs out of a set of tires... I never get rid of the tires due to being worn out (tread surface) but the side walls giving out and when they start going I see the 60 ft going away. So for me its a better set up all around with tubes and screws..... my opinion is if you have a big tire with low pressure you COULD be asking for problems 
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Re: when to put screws in the rims for slicks
[Re: DaveRS23]
#915357
01/28/11 10:37 AM
01/28/11 10:37 AM
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Joined: Dec 2004
Posts: 625
Florida-West Coast
Thor500
mopar
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mopar
Joined: Dec 2004
Posts: 625
Florida-West Coast
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Quote:
I personally do not screw my rims since I stopped using tubes. Is there any reason anymore to screw the tires on unless you're running tubes?
I agree, I have a buddy runnin 8.60's in a 2800# car and when he spent $450 a piece on new rims he sure wasn't gonna drill hole in them. We marked the wheel/rim and it moved about 1/2" after the first pass then never again.
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Re: when to put screws in the rims for slicks
[Re: Monte_Smith]
#915358
01/28/11 11:19 AM
01/28/11 11:19 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
Quote:
I run 9 x 28 M/T's with tubes on an 8 inch rim with 18 lbs of air. They aren't screwed to the rims. Been doing this for the past 6 seasons without any issues. The tubes keep the tire stiffer at launch and all the way down the track.
This is dangerous right here. If the tire ever happens to slip on the wheel, it will likely rip the stem out of the tube and you will be in for a rough ride, straight into the wall. I understand you have done it for 6 years. But all it takes is once.
Personally, I think people are nuts, not to anchor the tire to the rim in some way, but thats just me. Last year at an ADRL race, I saw a driver get after an XTF car too hard in the water and knocked both rear tires off the beads. Thats how fast it can happen
Monte
I really don't know what these guys are thinking. Maybe they just haven't seen this stuff happen themselves.
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Re: when to put screws in the rims for slicks
[Re: bigdad]
#915359
01/28/11 11:20 AM
01/28/11 11:20 AM
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Joined: Oct 2004
Posts: 8,165
Left Coast
BobR
master
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master
Joined: Oct 2004
Posts: 8,165
Left Coast
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Quote:
Do they run screws in the rims in NASCAR ?
Apples to oranges comparison.
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Re: when to put screws in the rims for slicks
[Re: StrokerAspen]
#915360
01/28/11 12:11 PM
01/28/11 12:11 PM
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Joined: Oct 2003
Posts: 7,506
Az
Crizila
master
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master
Joined: Oct 2003
Posts: 7,506
Az
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Quote:
Quote:
What is the rule of thumb of when to put screws in the rims when using slicks ? what ET or power level or always?
Also what if you don't would it cause problems with valve stem on the tubes tearing off ?
thanks
We talked about putting screws in wheels at the Dave Morgan Chassis Seminar that I attended. There are a lot of factors to consider that get over looked. Things I would have never thought of.
For starters, You want to "Index" your screws. Basically, where ever you put a screw on the front side of the wheel, make sure you put the screw on the back of the wheel directly across from the screw on the front of the wheel. If the screws are staggered , this will cause the car to "wonder". Mis-aligned (staggered) screws tend to want to "twist" the tire, as the tire is being pulled from those points at where it is screwed to the rim.
Here is the best picture I could find in my library. SORRY it isn't a Mopar. 
You can see that the wrinkle is pulling from where the screw is on the wheel.
Second, how many screws do you put in the wheel? That depends on how big or small you want the "paddle" of the tire to be. Watch some of the high horsepower cars, and the tracks they make out of the whole. you can see the tire is "paddling" the ground. If the screws are further apart, the "paddle" is bigger, the closer the screws are, the smaller the paddle it.
for example....
5 screws around the diameter of the wheel will make for large paddles, but fewer paddles (4 paddles)
10 screws around the diameter of the wheel will make for smaller paddles, but more paddles (9 paddles)
What is the right amount of screws for a car? That I don't know. I personally haven't run screws. My tires seem to hook up just fine with out them.
-Kenny
Good info. Thanks!
Fastest 300
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mike
