THe Next Step
Postmaster
Joined: Dec 2006
Posts: 3,603
Likes: 10
From: Spokane, WA
Not exactly a technical term...one of those things that has evolved in race speak. A trap catches something and in this case catches and measures one's ending speed and elapsed time at the end of the run...like "taking" the checkered flag at the end of other type races.
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
I was meaning more of, if I were to head out into a quiet country back road to perform this test, which test is this referring to? Quarter mile time/speed?
I'm curious how to fill all the parts of the equation on this without heading to a real track.
I'm curious how to fill all the parts of the equation on this without heading to a real track.
Cargo Master
Joined: Jan 2004
Posts: 2,512
Likes: 8
From: Cook Forest and Irwin PA
well, mark off 1/4 mile (1320 feet, 440 yards). punch it.
as you cross the line, have someone stop the stopwatch and another glance at the speedo - low tech, but its essentially what the track does.
u sure there is no raceway near by? they usually have 'run what ya brung' fridays for like $15 3 passes (based on my local experiences)
as you cross the line, have someone stop the stopwatch and another glance at the speedo - low tech, but its essentially what the track does.
u sure there is no raceway near by? they usually have 'run what ya brung' fridays for like $15 3 passes (based on my local experiences)
Elder User
Joined: May 2008
Posts: 508
Likes: 0
From: Wasilla, AK
Talking about heads and CR, I remember a long time ago reading an article in a Hot Rod Mag were someone took some 302 or 351 heads and cut them into six sections. The welded them together, machined them, installed big valves. The put it on a 300 I6 for the drags. It was a cross flow head (like the old Waynes head for Chevy sixes), carb one side exhaust on the other. It looked cool and I guess it worked pretty well. If I remember right he was getting into the 9's with it. Fordsix was supposed to come out with a new head last year for the big sixes but I haven't seen it yet. Does anyone know whats going on with that?
Tim
Tim
Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
I'd gear it past 5.00 for 36'' tires. Nothing less than 4.88, for sure. I have 4.11 with 31's and wish I was geared lower, at times. The highway speed is nice to have tho.
31x10.50 tire with 4.11 gear ratio and E40D tranny:
30 mph / 1,000 rpm
45 mph / 1,500 rpm or 2,000 rpm with OD off.
60 mph / 2,000 rpm
31x10.50 tire with 4.11 gear ratio and E40D tranny:
30 mph / 1,000 rpm
45 mph / 1,500 rpm or 2,000 rpm with OD off.
60 mph / 2,000 rpm
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
4.11s with 31s is geared pretty low by most standards... I have 3.00s with 30" tires and my truck isn't exactly slow. 4.11s would leave my paint on the street behind me. 
That being said, it does depend on what you want to do with it. If you're looking for every day driveability, 4.88s are going to take away from that. But if you mainly off-road, then they're a good bet.
Thanks for the info on the trap speed. I knew how to get a quarter-mile, but I also know there are different aspects they test at a track, and was making sure it was the right one. There is a track here, but I've never been out to it.
That being said, it does depend on what you want to do with it. If you're looking for every day driveability, 4.88s are going to take away from that. But if you mainly off-road, then they're a good bet.
Thanks for the info on the trap speed. I knew how to get a quarter-mile, but I also know there are different aspects they test at a track, and was making sure it was the right one. There is a track here, but I've never been out to it.
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Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
4.11s with 31s is geared pretty low by most standards... I have 3.00s with 30" tires and my truck isn't exactly slow. 4.11s would leave my paint on the street behind me.
That being said, it does depend on what you want to do with it. If you're looking for every day driveability, 4.88s are going to take away from that. But if you mainly off-road, then they're a good bet.
Thanks for the info on the trap speed. I knew how to get a quarter-mile, but I also know there are different aspects they test at a track, and was making sure it was the right one. There is a track here, but I've never been out to it.
That being said, it does depend on what you want to do with it. If you're looking for every day driveability, 4.88s are going to take away from that. But if you mainly off-road, then they're a good bet.
Thanks for the info on the trap speed. I knew how to get a quarter-mile, but I also know there are different aspects they test at a track, and was making sure it was the right one. There is a track here, but I've never been out to it.
I'm off to the car wash. I just don't have the energy today. I'll change my oil next weekend.
Gimme dat coffee
Elder User
Joined: May 2008
Posts: 508
Likes: 0
From: Wasilla, AK
Gears?
From your specs I'm assuming two wheel drive with a 9" rear end?
(mudding/2tracking) I doubt if your going to be rock climbing with a 2wd? If your going to use this rig for a daily driver I would suggest 3.73 gears. No lower than 4.56. (4.11's fall in the middle) These 300's were designed for low end torque not high end rpm. I'm thinking with 4.88's and the tall tires you'll be max out on the power band while driving down the highway. If you have a gear and driveline company close to home I would talk to them. They deal with this every day. Besides, if you don't have the tools (mic's and such) and have never set up a third member it would be cheaper to let them set it up. They would be the folks to talk to. They might even have one on the shelf ready to go. Anyhow, thats my two peenies worth, Good Luck!!
Tim
Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
Ryan,
From your specs I'm assuming two wheel drive with a 9" rear end? (mudding/2tracking) I doubt if your going to be rock climbing with a 2wd? If your going to use this rig for a daily driver I would suggest 3.73 gears. No lower than 4.56. (4.11's fall in the middle) These 300's were designed for low end torque not high end rpm. I'm thinking with 4.88's and the tall tires you'll be max out on the power band while driving down the highway. If you have a gear and driveline company close to home I would talk to them. They deal with this every day. Besides, if you don't have the tools (mic's and such) and have never set up a third member it would be cheaper to let them set it up. They would be the folks to talk to. They might even have one on the shelf ready to go.
Anyhow, thats my two peenies worth, Good Luck!!
Tim
From your specs I'm assuming two wheel drive with a 9" rear end?
(mudding/2tracking) I doubt if your going to be rock climbing with a 2wd? If your going to use this rig for a daily driver I would suggest 3.73 gears. No lower than 4.56. (4.11's fall in the middle) These 300's were designed for low end torque not high end rpm. I'm thinking with 4.88's and the tall tires you'll be max out on the power band while driving down the highway. If you have a gear and driveline company close to home I would talk to them. They deal with this every day. Besides, if you don't have the tools (mic's and such) and have never set up a third member it would be cheaper to let them set it up. They would be the folks to talk to. They might even have one on the shelf ready to go. Anyhow, thats my two peenies worth, Good Luck!!
Tim
Moderator
Joined: Dec 2007
Posts: 7,987
Likes: 104
From: Boise, Idaho
Again, it depends on what you want to do with it.
Off-road and off-the-line, yeah, 4.11, 4.88, maybe even some 5.38s (I think that's the ratio anyway). But for every day streetability, 3.73s, 4.11s.
The 300 makes it's peak horsepower at 3000 RPMs and stock doesn't do much above that.
If we're looking at ANY sense of highway travel, here's some numbers. This is assuming no overdrive and a 1:1 transmission ratio.
36 inch tires, 1:1 ratio @ 65mph
3.73: 2264
4.11: 2494
4.88: 2961
5.38: 3265
You would simply be pinning the engine just to maintain a decent highway speed of 65 with a 4.88 or 5.38. Granted, it will take more engine to get 36" tires to turn over decently, but not THAT much. I'd hate to be trying to go anywhere on the highway with 4.88s or 5.38s.
Off-road and off-the-line, yeah, 4.11, 4.88, maybe even some 5.38s (I think that's the ratio anyway). But for every day streetability, 3.73s, 4.11s.
The 300 makes it's peak horsepower at 3000 RPMs and stock doesn't do much above that.
If we're looking at ANY sense of highway travel, here's some numbers. This is assuming no overdrive and a 1:1 transmission ratio.
36 inch tires, 1:1 ratio @ 65mph
3.73: 2264
4.11: 2494
4.88: 2961
5.38: 3265
You would simply be pinning the engine just to maintain a decent highway speed of 65 with a 4.88 or 5.38. Granted, it will take more engine to get 36" tires to turn over decently, but not THAT much. I'd hate to be trying to go anywhere on the highway with 4.88s or 5.38s.
Elder User
Joined: May 2008
Posts: 508
Likes: 0
From: Wasilla, AK
Yep Bill your right. I was thinking of my pickup with 30" and t-18 tranny.
Had to edit after seeing abandonedbronco's post. Maybe I wasn't to far off with the 3.73's? Lets here from the gallery?
Tim
Had to edit after seeing abandonedbronco's post. Maybe I wasn't to far off with the 3.73's? Lets here from the gallery?
Tim
Elder User
Joined: Sep 2008
Posts: 563
Likes: 0
From: DeKalb, Ill.
Again, it depends on what you want to do with it.
Off-road and off-the-line, yeah, 4.11, 4.88, maybe even some 5.38s (I think that's the ratio anyway). But for every day streetability, 3.73s, 4.11s.
The 300 makes it's peak horsepower at 3000 RPMs and stock doesn't do much above that.
If we're looking at ANY sense of highway travel, here's some numbers. This is assuming no overdrive and a 1:1 transmission ratio.
36 inch tires, 1:1 ratio @ 65mph
3.73: 2264
4.11: 2494
4.88: 2961
5.38: 3265
You would simply be pinning the engine just to maintain a decent highway speed of 65 with a 4.88 or 5.38. Granted, it will take more engine to get 36" tires to turn over decently, but not THAT much. I'd hate to be trying to go anywhere on the highway with 4.88s or 5.38s.
Off-road and off-the-line, yeah, 4.11, 4.88, maybe even some 5.38s (I think that's the ratio anyway). But for every day streetability, 3.73s, 4.11s.
The 300 makes it's peak horsepower at 3000 RPMs and stock doesn't do much above that.
If we're looking at ANY sense of highway travel, here's some numbers. This is assuming no overdrive and a 1:1 transmission ratio.
36 inch tires, 1:1 ratio @ 65mph
3.73: 2264
4.11: 2494
4.88: 2961
5.38: 3265
You would simply be pinning the engine just to maintain a decent highway speed of 65 with a 4.88 or 5.38. Granted, it will take more engine to get 36" tires to turn over decently, but not THAT much. I'd hate to be trying to go anywhere on the highway with 4.88s or 5.38s.
I agree. I'm at 2500 rpm at 60 mph. No OD and 3.70s.
Post Fiend
Joined: Jan 2007
Posts: 7,021
Likes: 5
From: Almost Heaven
-shrug- It depends on the tranny, too, as previously said.
I just think 36's are too big for a 300 anyway. I'd stay in the 32'' range. Gear swap to 4.10's and be happy with it. The bigger the tire, the harder it is on EVERYTHING.
But hey, it's all about what you want and what you want to do with it. You want 36'' tires? You're going to need some deep gears, something post 5.00
I think the bigger the tire, the better looking. I'm not saying yay or nay. All I'm saying is, your 300 would handle better all the way around with 32's and a 4.10 gear ratio.
With that said, I can cruise at 70 mph, but I have no real power. I can maintain the speed but that's about it. So maybe 3.73's are indeed what you will want.
I know I'm saying a lot. I hope I haven't confuzzled anyone.
I just think 36's are too big for a 300 anyway. I'd stay in the 32'' range. Gear swap to 4.10's and be happy with it. The bigger the tire, the harder it is on EVERYTHING.
But hey, it's all about what you want and what you want to do with it. You want 36'' tires? You're going to need some deep gears, something post 5.00
I think the bigger the tire, the better looking. I'm not saying yay or nay. All I'm saying is, your 300 would handle better all the way around with 32's and a 4.10 gear ratio.
With that said, I can cruise at 70 mph, but I have no real power. I can maintain the speed but that's about it. So maybe 3.73's are indeed what you will want.
I know I'm saying a lot. I hope I haven't confuzzled anyone.