Overtired or Not?
#214012
02/04/09 02:59 PM
02/04/09 02:59 PM
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Joined: Jan 2009
Posts: 52 Bakersfield, CA
MarkKirby
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OP
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Joined: Jan 2009
Posts: 52
Bakersfield, CA
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Ok, here's my dilemma. I have run a 14.0 x 32 for several years since we back halved the car. It is now a 4 link at 3200lbs. My question is whether or not there is something worthwhile to gain by stepping down on tire size. I rarely have tire spin but one wouldn't expect it with this much tire and this little power. Should I step down to perhaps a 29.5 or some kind of 10.5 combo? What do y'all think? Current combo: 416SB 575hp, 540lbs tq 904 w/ 2.74 low gear 5:13 Dana 4 link at 3200lbs with me in it Strange double adjustable shocks(rear) 8" 5500 converter Launch at 4800, shift at 6500, traps at 6900 Current 60' = 1.39-1.40, ET = 10.49 at 123mph
Mark & Nancy Kirby
1971 Plymouth Duster
The Grape Ape
10.20 @129mph 1.32 60'
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Re: Overtired or Not?
[Re: Quicktree]
#214015
02/04/09 04:49 PM
02/04/09 04:49 PM
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Joined: Oct 2006
Posts: 60 Sheboygan, Wi.
S/SSJOHN
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member
Joined: Oct 2006
Posts: 60
Sheboygan, Wi.
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In regard to your question ,a young guy that hangs around my shop and helps me on my race car, built a 66 Dodge Dart 2dr Post Bracket car! This car weighs 3400 # w/him in car has a 416 S/b with a 800, d/p Edelbrock heads flat tappet cam, around 12.0 comp, and no spray! Trans is a 904 w/2.75 first and a 4.30 rear, w/11.5X28.5 Slick, using Cal-Tracs and their springs and shocks! This is an all steel except for a glass hood w/rear open scoop! I think thats about it for specs, the car turns steady times of 10.15-10.20 @ 131.00 mph in average midwest air! At Union Grove Wi. 60 FTs at1.37. It flat as hauls and there is nothing real trick in it. John Lang
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Re: Overtired or Not?
[Re: topside]
#214019
02/04/09 06:48 PM
02/04/09 06:48 PM
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Joined: Jan 2009
Posts: 52 Bakersfield, CA
MarkKirby
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Posts: 52
Bakersfield, CA
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All these answers make sense. This is also an old SS/IA car. I was pretty sure we would pickup ET with a smaller tire but since we run at lots of different tracks and lots of different weather conditions it seems to make sense to stay with the bigger tire for this protection. I really don't need to drop tenths off the ET because I like running at the top of Super Pro and knocking off 170mph dragsters all day. However, one always wants to know what the optimum configuration might be for any combo.
That 2dr post car is really kicking it for what it has in it. Way to go.
Mark & Nancy Kirby
1971 Plymouth Duster
The Grape Ape
10.20 @129mph 1.32 60'
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Post deleted by Defbob
[Re: Monte_Smith]
#214021
02/04/09 08:40 PM
02/04/09 08:40 PM
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Anonymous
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Anonymous
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Re: Overtired or Not?
#214023
02/04/09 09:37 PM
02/04/09 09:37 PM
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Anonymous
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Anonymous
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Quote:
Quote:
The car would likely work better and run faster, with a 33x10.5 M/T tire.
Monte
last year Monte suggested I do the same. the results were quick to prove him right. My 60' dopped from 1.26 to 1.22 and picked up almost a tenth in the 1/4
what are you talking about. i talked you into those tires! where do you think you got them from?
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Re: Overtired or Not?
#214024
02/04/09 09:47 PM
02/04/09 09:47 PM
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Joined: Jan 2009
Posts: 52 Bakersfield, CA
MarkKirby
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Joined: Jan 2009
Posts: 52
Bakersfield, CA
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The truth is...on many days, when the weather cooperates, the car is dead on consistent. At our very last race we made 7 passes in a row within .007 and won the event. Obviously, there are days when we are not as "on" but it is usually a factor of DA or driver brain farts. As far as tire is concerned I don't think we could get more consistent. The car almost never reacts to air pressure adjustments. I have run between 9-13lbs without varying .01 on the 60'. I typically run the shocks at two clicks from full extension and midway on the rebound. No down track issues with this setting and the extension is mostly adjusted to control wheelstands. At this setting, on our first pass at the Thanksgiving event at Las Vegas the first launch was pretty exciting. I was able to watch an F-15 land at Nellis AFB between launch and the 1-2 shift.
I haven't really started to experiment with front shocks yet but that's kind of in the plan for this year. Still running non-adjustable worn out station wagon shocks.
Mark & Nancy Kirby
1971 Plymouth Duster
The Grape Ape
10.20 @129mph 1.32 60'
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Re: Overtired or Not?
[Re: S/SSJOHN]
#214025
02/04/09 10:47 PM
02/04/09 10:47 PM
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Joined: Jan 2003
Posts: 981 Way North Illinois
JandJ_Racing
super stock
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super stock
Joined: Jan 2003
Posts: 981
Way North Illinois
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Quote:
In regard to your question ,a young guy that hangs around my shop and helps me on my race car, built a 66 Dodge Dart 2dr Post Bracket car! This car weighs 3400 # w/him in car has a 416 S/b with a 800, d/p Edelbrock heads flat tappet cam, around 12.0 comp, and no spray! Trans is a 904 w/2.75 first and a 4.30 rear, w/11.5X28.5 Slick, using Cal-Tracs and their springs and shocks! This is an all steel except for a glass hood w/rear open scoop! I think thats about it for specs, the car turns steady times of 10.15-10.20 @ 131.00 mph in average midwest air! At Union Grove Wi. 60 FTs at1.37. It flat as hauls and there is nothing real trick in it. John Lang
I think I know that guy just cant remember his name, I know he know the Sheboygen Genskis And yes his car runs well, I think he told me that the bottom end had a bunch of years on it.
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Re: Overtired or Not?
[Re: MarkKirby]
#214027
02/05/09 11:15 AM
02/05/09 11:15 AM
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Joined: Feb 2009
Posts: 1,532 off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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Hello to all. I'm a new member, been following Moparts every day for about 2 months. I say keep the bigguns, enjoy the traction and knowlege that even if track prep isn't that good you'll be able to stick it! Good looking Duster; added it to my pic collection.
Last edited by 340B5; 02/05/09 11:22 AM.
Yeah, it's got a smallblock.
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Re: Overtired or Not?
[Re: 340B5]
#214028
02/05/09 11:24 AM
02/05/09 11:24 AM
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Joined: Jul 2006
Posts: 4,595 On the south side of Nowhere
S/ST 3040
master
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master
Joined: Jul 2006
Posts: 4,595
On the south side of Nowhere
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Welcome to Moparts. Big tires don't guarantee traction. I ran 14" x 32" Goodyears on a 340 powered 2830 lb. car and it took me awhile to get it to hook. Big tires were no cure-all for poor track prep either.
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Re: Overtired or Not?
[Re: S/ST 3040]
#214029
02/05/09 12:01 PM
02/05/09 12:01 PM
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Joined: Feb 2009
Posts: 1,532 off the grid
340B5
pro stock
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pro stock
Joined: Feb 2009
Posts: 1,532
off the grid
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I stand partially corrected. Big tires are no cure all. Laws of physics would state it's all about PSI to the pavement. I personally wouldn't spend $1000 for a couple mph, or a couple hundredths 60'.
Yeah, it's got a smallblock.
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Re: Overtired or Not?
[Re: 340B5]
#214030
02/05/09 12:16 PM
02/05/09 12:16 PM
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Joined: Jan 2003
Posts: 19,382 Las Vegas
Al_Alguire
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 19,382
Las Vegas
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Seems to me you are answering your own original post with your replies here.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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