Evadman
Administrator Emeritus<br>Elite Member
- Feb 18, 2001
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Ok! Stupid Math time. Here is the Process for the G's of acceleration at 4000 RPM
4000 RPM.
1000 firings per minute.
8000 Reversals ( Top and bottom. Actually, it would be 7998, but for ruond #'s it is close enough. )
Assume the engine has a 3.88 Stroke. ( That is for my V-10. chevy 350 is 3.48 )
Ok, assuming that acceleration is lineal ( which it is not, but for mathmatical reasons and simplicity, that is what I am going to do this with ) then the pistion accelerates 1/2 time, and decel the other 1/2. So, 4000 ( 8000/2 ) times a second that piston is accelerationg to top speed, and it is doing that in 3.88in /2 ( the other half it is accelerating ) so, at 4000 RPM ( 4000/60 = 66.6 ) 66.6 times a second that piston is covering 3.88/2 inches. ( can you tell this is gonna be fast yet? ) thet means that the average speed that the piston is moving in a straight line ( average in an engine is actully zero since it reverses ) is 258*2 inches per second. ( (66.6 x 3.88)*2 inches ) which equates to 15480*2 inches per minute. ( The times 2 is because the piston moves up once and down once per revolution )
That is 1258 feet per minute ( 5280 Feet per minute is 60 MPH ) 1258 is just short of 1.4 mile, which means that at average speed the piston is moving at about 15 MPH.
Remember, that is average spped in the cyl. Here is a diagram of a cyl to help with the rest of my math.
stopped (Bottom dead center) -- Medium speed -- top speed -- Medium speed -- Stopped (top dead center)
So the average spped (medium) is exactly 1/2 of top speed, whcih means top speed of the piston at 4000 RPM is about 30MPH. Now remeber, the stroke is 3.88 inches, so that piston is accelerationg to 30 MPH in about 1.94 INCHES. That is about the distance from the #1 key to the #4 key on your keyboard. That is insane. A top fuel dragster might hit 30MPH in about 15 feet.
So now we need the time that the piston is accelerating in that 1.94 inches. at 4000 RPM ( 8000 reversals remember ) tha means that it takes that piston 8000/60 = 133 times a second ( remember we devided by 2 above to get 66.6 ) that the piston is accelerating to top speed which means it takes 1/133 of a second to acelerate to that speed.
Ok, now for the physics. we must Convert to Metrics ( how annoying ) So 1.33 inches = .033782 meters. 30 MPH = 48 KMH = 48000 Meters/minute = 48000/60/60 =
That means that the piston is accelerating to 13.3 meters per second in .033783 meters.
Plug that into our acceleration forumula. Acceleration = change in velocity / time taken for change.
change in velocity = 13.3 m/s
Time taken = 1/133 second
13.3 / (1/133) = 17728.9 m/s^2 acceleration.
one G is = to 9.81 m/s^2 17728.9 / 9.81 =
1807 G's of acceleration ( my last post was in error as you can see )
That means that the 2 lb piston has 3600 LB's of force on it when it is spinning at 4000 RPM. That is about the same as a Lincon town car.
Not only can you see how much force is on that piston, but you can see how monumentily in-efficent the engine is. If 100% of the force was transfered to the wheels that 3600 LBs of force would be equal to about 1800 Horsepower. And that is only one cyl.
4000 RPM.
1000 firings per minute.
8000 Reversals ( Top and bottom. Actually, it would be 7998, but for ruond #'s it is close enough. )
Assume the engine has a 3.88 Stroke. ( That is for my V-10. chevy 350 is 3.48 )
Ok, assuming that acceleration is lineal ( which it is not, but for mathmatical reasons and simplicity, that is what I am going to do this with ) then the pistion accelerates 1/2 time, and decel the other 1/2. So, 4000 ( 8000/2 ) times a second that piston is accelerationg to top speed, and it is doing that in 3.88in /2 ( the other half it is accelerating ) so, at 4000 RPM ( 4000/60 = 66.6 ) 66.6 times a second that piston is covering 3.88/2 inches. ( can you tell this is gonna be fast yet? ) thet means that the average speed that the piston is moving in a straight line ( average in an engine is actully zero since it reverses ) is 258*2 inches per second. ( (66.6 x 3.88)*2 inches ) which equates to 15480*2 inches per minute. ( The times 2 is because the piston moves up once and down once per revolution )
That is 1258 feet per minute ( 5280 Feet per minute is 60 MPH ) 1258 is just short of 1.4 mile, which means that at average speed the piston is moving at about 15 MPH.
Remember, that is average spped in the cyl. Here is a diagram of a cyl to help with the rest of my math.
stopped (Bottom dead center) -- Medium speed -- top speed -- Medium speed -- Stopped (top dead center)
So the average spped (medium) is exactly 1/2 of top speed, whcih means top speed of the piston at 4000 RPM is about 30MPH. Now remeber, the stroke is 3.88 inches, so that piston is accelerationg to 30 MPH in about 1.94 INCHES. That is about the distance from the #1 key to the #4 key on your keyboard. That is insane. A top fuel dragster might hit 30MPH in about 15 feet.
So now we need the time that the piston is accelerating in that 1.94 inches. at 4000 RPM ( 8000 reversals remember ) tha means that it takes that piston 8000/60 = 133 times a second ( remember we devided by 2 above to get 66.6 ) that the piston is accelerating to top speed which means it takes 1/133 of a second to acelerate to that speed.
Ok, now for the physics. we must Convert to Metrics ( how annoying ) So 1.33 inches = .033782 meters. 30 MPH = 48 KMH = 48000 Meters/minute = 48000/60/60 =
That means that the piston is accelerating to 13.3 meters per second in .033783 meters.
Plug that into our acceleration forumula. Acceleration = change in velocity / time taken for change.
change in velocity = 13.3 m/s
Time taken = 1/133 second
13.3 / (1/133) = 17728.9 m/s^2 acceleration.
one G is = to 9.81 m/s^2 17728.9 / 9.81 =
1807 G's of acceleration ( my last post was in error as you can see )
That means that the 2 lb piston has 3600 LB's of force on it when it is spinning at 4000 RPM. That is about the same as a Lincon town car.
Not only can you see how much force is on that piston, but you can see how monumentily in-efficent the engine is. If 100% of the force was transfered to the wheels that 3600 LBs of force would be equal to about 1800 Horsepower. And that is only one cyl.
What I paid for my Tuscan: £ 47,500
What a Corvette Z06 cost: £ 44,000
actually a corvette does not cost 44,000 pounds. it cost around 40 grand american making it cost around 20,000 pounds
and i would think it would be very hard finding a tuscan for 80 grand american after the imported fees, markup and such
1 pound = around 2 dollars american
TVR Tuscan is not similar to a corvette in hardly any way
its a exotic car from britian
What a Corvette Z06 cost: £ 44,000
actually a corvette does not cost 44,000 pounds. it cost around 40 grand american making it cost around 20,000 pounds
and i would think it would be very hard finding a tuscan for 80 grand american after the imported fees, markup and such
1 pound = around 2 dollars american
TVR Tuscan is not similar to a corvette in hardly any way
its a exotic car from britian
Most of the bikes that I've had can do 60 in under 3 seconds. One of my cars (modified VW GTI) does 60 in about 7 seconds and my stock Audi A4 Quattro does it in about 8 (Stock stats).
I don't know what it is though, but cars feel faster to me than bikes. You'd think the opposite was true. I think it's being pushed back in the seat vs. hanging on? I've been in several cars that can get to 60 in about 5 seconds and they feel faster than the bikes that do it in 3.
Sal
I don't know what it is though, but cars feel faster to me than bikes. You'd think the opposite was true. I think it's being pushed back in the seat vs. hanging on? I've been in several cars that can get to 60 in about 5 seconds and they feel faster than the bikes that do it in 3.
Sal
you also need a forced induction 6cyl in there
that was one bad ass buick... don't screw with that
that was one bad ass buick... don't screw with that
Right on par with the 2001 lightning... 0-60 in about 5.4... Supercharged LM7 (5.3 litre) truck weighs 5300lbs
Evadman
Administrator Emeritus<br>Elite Member
- Feb 18, 2001
- 30,990
- 5
- 81
I have a '81 Honda CBX that I am too scared of to drive I took it around the block once and almost killed myself. I am now working with the guys at the local motorcycle shop to turn it into a shifter-cart. If I shifter cart can do 125 MPH with a 125cc engine, what can one do with this motor? I am unsure of the cc's, but it is a straight air-cooled 6 cyl. The sad thing ( for you, not me )is that the bike only had 3.2 miles on it ( my trip around the block ) before disasembly
I took it around the block once and almost killed myself. I am now working with the guys at the local motorcycle shop to turn it into a shifter-cart. If I shifter cart can do 125 MPH with a 125cc engine, what can one do with this motor? I am unsure of the cc's, but it is a straight air-cooled 6 cyl. The sad thing ( for you, not me )is that the bike only had 3.2 miles on it ( my trip around the block ) before disasembly << Loust!! Welcome to our discusion
how much does your truck weigh anyway? >>
5300lbs with me in it, The Supercharger is a Twin Screw type and added 50lbs more to the truck, plus I put on much bigger tires then stock but they hook much better (285/70/R16's) They are Yokahama AVS's, the only way I could get a H-rated tire that size on a 16" wheel.
The Time looks slow but this track is at 5800FT making it the highest altitude NHRA track in the world, thats a Z28 beside me... check out my E/T compared to my MPH, I LOVE my Low-End torque
My truck just hops out of the hole (I race in Auto-Trac)Here is my truck beating a Z28 he had traction problems to explain his bad E/T but as you can tell by his MPH it's not the V6
Hayabusa Rider
Admin Emeritus & Elite Member
- Jan 26, 2000
- 50,879
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Evadman
Administrator Emeritus<br>Elite Member
- Feb 18, 2001
- 30,990
- 5
- 81
Wow, he must have had traction problems right off the line if he could hit that MPH. at 94 MPH, it can not be stock either.
Isn't the look you get when you pull to the line great when the opponent looks at your truck? I had one guy actually laugh at my dial-in in the window. He actually laughed at me Too bad I didn't race him
Is that track where the "mile High Nationals" are held? that your hometown area? I am gonna have to drive my butt out there and race ya. Only problem is the 5-6 MPG I get I think shipping my truck UPS would be less than gas
Isn't the look you get when you pull to the line great when the opponent looks at your truck? I had one guy actually laugh at my dial-in in the window. He actually laughed at me
Too bad I didn't race him Is that track where the "mile High Nationals" are held? that your hometown area? I am gonna have to drive my butt out there and race ya. Only problem is the 5-6 MPG I get
I think shipping my truck UPS would be less than gas << Wow, he must have had traction problems right off the line if he could hit that MPH. at 94 MPH, it can not be stock either.
Isn't the look you get when you pull to the line great when the opponent looks at your truck? I had one guy actually laugh at my dial-in in the window. He actually laughed at me
Too bad I didn't race him Is that track where the "mile High Nationals" are held? that your hometown area? I am gonna have to drive my butt out there and race ya. Only problem is the 5-6 MPG I get
I think shipping my truck UPS would be less than gas >>Yep Cummins actually holds Truckfest there too "Rocky Mountian Thundermountain Truckfest" But yep and this year was the 1st year ever that the top fuelers broke into the 4's up here at Mile High Nationals.
yep
I've had a bunch of people do that crap, the guys at the gates always asked me if I was a spectator 1st even tho I had my Bandimere registered sticker right there in the window, finally I just told em the thing has 480HP and runs high 14's this is why I'm giving you $25 and not the spectator fee, he gave me a dirty look but it was fun to say LOL @ UPS
, Ouch that milage hurts :/ I get a large variation, I have 2 booster injectors now both are 24lbs so when I put on my smaller pulley (8psi) and bump up the timing and add some fuel I only get low teens, right now in the winter I put on my big pulley (5psi) and go back to basically stock programming I hit about 18-19.
go BOXER engine!!!!
SUBARU POWER!!!!!!
uh high 7s is my 0-60
don't know 1/4 time.....
but ill take ya'll on a slalom come on.....
SUBARU POWER!!!!!!
uh high 7s is my 0-60
don't know 1/4 time.....
but ill take ya'll on a slalom come on.....
Did you toss those heavy ol Iron heads and get some from the Viper ones or aftermarket?
Last edited:
[qi got 2.8 seconds Yamaha YZFR1 1.0L engine, 2 cylinder[/i] >>
Heads up Motorcycle peeps.
I do 3.5 on a Kawasaki Dual Sport.
Heads up Motorcycle peeps.
I do 3.5 on a Kawasaki Dual Sport.
Hayabusa Rider
Admin Emeritus & Elite Member
- Jan 26, 2000
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Oh yeah, the R1 is an inline 4 like all other sportbikes (of course with the exceptions of the RC51 and Ducks) Not sure of my 0-60 times, but I have done the quarter in 9.79 Tested speed via radar gun (friend cop literally- no ticket involved) Top speed 198- no wind. I must have gotten one of the better bikes. Some can only do 187. Of course I have a '99 so it isnt restricted.
Hayabusa Rider
Admin Emeritus & Elite Member
- Jan 26, 2000
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Lol BigDude, if you get to use NOS, I get to install the Mr. Turbo
Seriously, I know someone who did just that, but I would worry about tire integrity at 240 mph. Lil spooky even for me.
Seriously, I know someone who did just that, but I would worry about tire integrity at 240 mph. Lil spooky even for me.
Hayabusa Rider
Admin Emeritus & Elite Member
- Jan 26, 2000
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<< Speed exhibition is illegal in all states and concidered reckless and foolish behavior by all law enforcement professionals and is a moving violation thus effecting insurance and driver license eligibility. zoomzoomzoom???:Q >>
Not on a closed track.
<< What I paid for my Tuscan: £ 47,500
What a Corvette Z06 cost: £ 44,000
actually a corvette does not cost 44,000 pounds. it cost around 40 grand american making it cost around 20,000 pounds
and i would think it would be very hard finding a tuscan for 80 grand american after the imported fees, markup and such
1 pound = around 2 dollars american
TVR Tuscan is not similar to a corvette in hardly any way
its a exotic car from britian >>
Uhhh Bigshot, Flat is from the UK... Making a TVR much easier to afford, and I don't think they make the 'vette in England.
<< <<
As soon as it is convient for me to have some pictures or me in my car, Anandtechers will be the first to know. I have a track day coming up January 5th, I am sure someone will be willing to snap a pic of me & the car. >>
And make sure YOU'RE clearly visible in the photo. We'll compare it against your reference photo(the one with you holding a pumpkin up) to verify its authenticity. >>
And make sure you're holding a big sign saying : HAHA Jerboy, let's see mommy and daddy buy you this!!! Add a middle finger if possible.
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