December All Topic
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
5 bills and a 1 1/2 hour round trip.
Last edited by SteveBricks; Dec 12, 2010 at 01:52 PM.
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
No lugs, no center caps...though I wouldn't have used the caps on the front anyway because I like to manually engage the hubs when racing. Should be able to pick up some lugnuts pretty easily if I have to.
I'll be out to Irwindale a couple times before the season opens to get a feel for things...shouldn't be too tough to make the necessary adjustments. No tougher than before, anyways.
I'll be out to Irwindale a couple times before the season opens to get a feel for things...shouldn't be too tough to make the necessary adjustments. No tougher than before, anyways.
FTE Leadership Emeritus
Joined: Jul 2008
Posts: 111,873
Likes: 153
From: Wharton, NJ
Whats the weight to time ratio, 100lbs=.10sec?
Post Fiend
Joined: Dec 2007
Posts: 19,460
Likes: 0
From: carter lake ia.
should be alittle quicker.
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FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
For rotating mass vs. dead weight I've heard figures ranging from 1lb = 7.5lbs to 1 lb = 10 lbs. I don't know if 100 lbs of dead weight equals .1 sec or not.
So theoretically if I'm saving say, 72 pounds of rotating weight that could equal up to the equivalent of 720 pounds of dead weight over the old tire/wheel combo. There's no way that'll make the truck .72 faster in the quarter, but I think between that and it's being a shorter tire (30.5" instead of 34.5") it's realistic to expect 2 or 3 tenths.
I suppose if I really wanted to try to figure it out this might help: http://www.mcasco.com/p1rdy.html
But that stuff makes my brain hurt
So theoretically if I'm saving say, 72 pounds of rotating weight that could equal up to the equivalent of 720 pounds of dead weight over the old tire/wheel combo. There's no way that'll make the truck .72 faster in the quarter, but I think between that and it's being a shorter tire (30.5" instead of 34.5") it's realistic to expect 2 or 3 tenths.
I suppose if I really wanted to try to figure it out this might help: http://www.mcasco.com/p1rdy.html
But that stuff makes my brain hurt
Last edited by SteveBricks; Dec 12, 2010 at 03:40 PM.
FTE Leadership Emeritus
Joined: Jul 2008
Posts: 111,873
Likes: 153
From: Wharton, NJ
Yea, I can see the tire making more of a difference due to size than weight.
If you lighten up the total weight, lets say 400lbs, is there a formula for speed in a consistent run at the higher weight?
If you lighten up the total weight, lets say 400lbs, is there a formula for speed in a consistent run at the higher weight?
Post Fiend
Joined: Dec 2007
Posts: 19,460
Likes: 0
From: carter lake ia.
you know i was told a while ago that a shorter tire will lower you gear ratio slightly. i don't know if its true or not. they have one for stock car racing i have a couple of books with that formula in it. for drag racing i have no idea.
Last edited by SteveBricks; Dec 12, 2010 at 03:50 PM.
FTE Leadership Emeritus
Joined: Aug 2007
Posts: 42,085
Likes: 6
From: Lakewood, Ca.
You can plug numbers in to the mph/weight calculator and fiddle around: Automotive Calculators offer to you by Ford Trucks Enthusiasts
They're pretty accurate, but there's so many variables that nothing's gonna give you dead nuts figures. Kinda fun to play around with though.
I don't think the calculator here on FTE takes drive train loss into consideration, so the HP figures are probably high by about 20%.
They're pretty accurate, but there's so many variables that nothing's gonna give you dead nuts figures. Kinda fun to play around with though.
I don't think the calculator here on FTE takes drive train loss into consideration, so the HP figures are probably high by about 20%.
Last edited by SteveBricks; Dec 12, 2010 at 03:53 PM.
