stock 1/4 mile?

[Guest]

OK, my bad.
Don't see any Camaros on that list.

Speaking of Camaros, if this kid(car owner) has, lets say, a 95 SS or Z28 in reasonable shape and he knows how to drive it the feller on the 850 might be in for some kinda rude awakening.
Those cars were/are quick!

 

[Allie]

OK, my bad.
Don't see any Camaros on that list.

6 was a ZL-1 Camaro.

 

[tkent02]

Doh !

 

[SqDancerLynn1]

Tire technology has change tremendously since the 70's

 

[TheCafeKid]

I had a 78 T/A that'd do 13 flat in street tires. It was NOT stock however.

If you can hook up without killing yourself your gonna have a shot. It's likely going to be easier for him to hook up cleanly unless you've got a lot of experience drag racing with a bike. It definitely takes skill to launch without blowing all your "umph" with a wheelie. A problem he's not likely to have.
I drove a 96? Camero SS or Z28 one (can't remember which) that had the LT motor in it with the 6sp tranny. They were damn fast. I was quite impressed and I've driven a lot of "very fast" cars. But what was even more amazing to me was how quick they stopped! Great brakes on that car

 

[850 Combat]

Corvettes and Cobras are not muscle cars. They are sports cars. Hemi's were so rare where I lived, in Orange County, they were virtually never seen. Most muscle cars I saw were 383 Road Runners and Chargers, 389 GTO's, etc. Not too many with the 4.1 rear ends, either. A GS850 would have taken them in a street race

A new '83 850G ran 12.72 at 103. I have a test of a '79, it was virtually the same. Barely a second quicker than a Fatboy.

If this Camaro is actually running low 13's every week, 1t is going to beat the GS850. I virtually never see any bikes equal what magazine testers get out of them.

As to a GS850 going 135 mph, only off a cliff. That is over 10000 RPM in top gear. It isn't happening.

 

[Tim Tom]

850Combat,

I checked up on the maths a bit. Tried various 'top speed calculators,' this one seemed to be one of the better ones.
http://www.cosportbikeclub.org/misc/SpeedCalc.html
At 9500 rpm, the bike would be doing 135.2 mph. I'd say that falls into the "possible while not riding off a cliff" category. Provided your motor doesn't explode first.
Just for kicks 10000 rpm would have you doing a blistering 142mph!!

(yes I realize that these discount many factors, like wind, rider weight, temperature, traction, degree of slope etc, but under ideal conditions with a skinny guy hanging on, its possible)

//End Hijack

Regardless this is all irrelevant because no way is the bike getting to top speed in the 1/4 mile. The race all depends on whether your car driving friend is actually right, and knows what he's talking about running low 13's, or he is exaggerating.

Only way to find out is to hit the drag strip. Ohh and get someone to video tape it, it and share with the class!

 

[850 Combat]

850Combat,

I checked up on the maths a bit. Tried various 'top speed calculators,' this one seemed to be one of the better ones.
http://www.cosportbikeclub.org/misc/SpeedCalc.html
At 9500 rpm, the bike would be doing 135.2 mph. I'd say that falls into the "possible while not riding off a cliff" category. Provided your motor doesn't explode first.
Just for kicks 10000 rpm would have you doing a blistering 142mph!!

(yes I realize that these discount many factors, like wind, rider weight, temperature, traction, degree of slope etc, but under ideal conditions with a skinny guy hanging on, its possible)

//End Hijack

Regardless this is all irrelevant because no way is the bike getting to top speed in the 1/4 mile. The race all depends on whether your car driving friend is actually right, and knows what he's talking about running low 13's, or he is exaggerating.

Only way to find out is to hit the drag strip. Ohh and get someone to video tape it, it and share with the class!

I used the road test data that I attached:

4460 rpm at 60 mph.

135 mph divided by 60 mph equals 2.25

2.25 times 4460 rpm equals 10035 rpm

That means 10035 rpm at 135 mph

Thanks for the correction, but I'm sticking to my story just the same.

What math did you use to figure it all out?

They red line at 9000 rpm, by the way, and they will not pull red line in top gear.

 

[Tim Tom]

What math did you use to figure it all out?
They red line at 9000 rpm, by the way, and they will not pull red line in top gear.

If you insist. Everyone not interested in long equations don't read this. I apologize.

My math...

MPH = (RPM / Overall Ratio) x (Tire Circumference x .0009469)

(The absurdly small decimal at the end is the conversion factor to get your answer in mph)

In order for this equation to work we also need the equations for Overall Ration and Tire Circumference.

Overall Ratio = Primary Drive Ratio x Gear Ratio x Final Ratio
Overall Ratio= 1.775 x 0.961 x 3.090 = 5.270

Tire Circumference = (Width/25.4 x Aspect Ratio /100 + Rim Size/2 ) x 2PI
(25.4 being conversion factor from mm to inches)
Tire Circumference = (130/25.4 x .9 +17 /2) x 2(3.14) = 82.35 inches

Now we can plug these numbers back into the mph equation and see what happens.

MPH = (RPM / Overall Ratio) x (Tire Circumference x .0009469)
MPH = (9000/ 5.270) x (82.35 x .0009469)
MPH = 133.1 mph

Using your given redline of 9000, a GS850G could mathematically achieve 133 mph.

However since 135 mph seems to be the magic number here, what RPM would be needed to achieve this? Using some Algebra to re-write the equation to solve for RPM we find that:

RPM = MPH x (1056 /Tire Circumference) x Overall Ration
(1056 being the appropriate conversion factor here)
RPM= 135 * (1056/82.35) * 5.270
RPM=9123

So therefore in order for a GS850G to achieve 135 miles per hour in ideal conditions you would only need to spin the engine a mere 123 rpm's past the redline.

Mathematically possible, and still no cliffs are needed. Given how robust the engine is I would say it could withstand this RPM for short durations, I don't suggest doing it all day.


To everyone who came here to read about a drag race for bragging rights I apologize again.
.
.
.
.
You know you go to an engineering college when that happens ^^^

 

[850 Combat]

If you insist. Everyone not interested in long equations don't read this. I apologize.

My math...

MPH = (RPM / Overall Ratio) x (Tire Circumference x .0009469)

(The absurdly small decimal at the end is the conversion factor to get your answer in mph)

In order for this equation to work we also need the equations for Overall Ration and Tire Circumference.

Overall Ratio = Primary Drive Ratio x Gear Ratio x Final Ratio
Overall Ratio= 1.775 x 0.961 x 3.090 = 5.270

Tire Circumference = (Width/25.4 x Aspect Ratio /100 + Rim Size/2 ) x 2PI
(25.4 being conversion factor from mm to inches)
Tire Circumference = (130/25.4 x .9 +17 /2) x 2(3.14) = 82.35 inches

Now we can plug these numbers back into the mph equation and see what happens.

MPH = (RPM / Overall Ratio) x (Tire Circumference x .0009469)
MPH = (9000/ 5.270) x (82.35 x .0009469)
MPH = 133.1 mph

Using your given redline of 9000, a GS850G could mathematically achieve 133 mph.

However since 135 mph seems to be the magic number here, what RPM would be needed to achieve this? Using some Algebra to re-write the equation to solve for RPM we find that:

RPM = MPH x (1056 /Tire Circumference) x Overall Ration
(1056 being the appropriate conversion factor here)
RPM= 135 * (1056/82.35) * 5.270
RPM=9123

So therefore in order for a GS850G to achieve 135 miles per hour in ideal conditions you would only need to spin the engine a mere 123 rpm's past the redline.

Mathematically possible, and still no cliffs are needed. Given how robust the engine is I would say it could withstand this RPM for short durations, I don't suggest doing it all day.


To everyone who came here to read about a drag race for bragging rights I apologize again.
.
.
.
.
You know you go to an engineering college when that happens ^^^

Try adding in the secondary reduction of 1.062 into your calculation then try it again. The number you are looking for is larger than 5.27

What school did you go to?

http://www.thegsresources.com/_forum/showthread.php?t=186181&highlight=shaft+drive+gear+ratios

 

[Guest]

Doh !

Heh, I missed it too..

 

[Guest]

I had a 78 T/A that'd do 13 flat in street tires. It was NOT stock however.

If you can hook up without killing yourself your gonna have a shot. It's likely going to be easier for him to hook up cleanly unless you've got a lot of experience drag racing with a bike. It definitely takes skill to launch without blowing all your "umph" with a wheelie. A problem he's not likely to have.
I drove a 96? Camero SS or Z28 one (can't remember which) that had the LT motor in it with the 6sp tranny. They were damn fast. I was quite impressed and I've driven a lot of "very fast" cars. But what was even more amazing to me was how quick they stopped! Great brakes on that car

My brother in law had a 95 Z28 that I got to drive many times cause he liked to drink too much. He drank, I drove. All stock. The car was a little speed demon and too much fun to drive.
Several years ago I test drove a used 96 SS, white with orange stripes, 6 speed. I came this close to buying it but chickened out. Prolly just as well.
I still like em!

 

[Tim Tom]

Try adding in the secondary reduction of 1.062 into your calculation then try it again. The number you are looking for is larger than 5.27

Aww crap. I shoulda known I forgot something. That's what I get for studying architecture at my engineering school. Precise, but inaccurate.

Bone stock, you'd need to spin the 850G up to 9,690 rpm's to hit 135 mph.

While 'mathematically' possible, it may not be so kind to the engine.
Well played sir. Where is that cliff?

 

[tkent02]

Bone stock, you'd need to spin the 850G up to 9,690 rpm's to hit 135 mph.

While 'mathematically' possible, it may not be so kind to the engine.

Nah, it's a GS. They like that.

 

[hampshirehog]

Bone stock, you'd need to spin the 850G up to 9,690 rpm's to hit 135 mph.

While 'mathematically' possible, it may not be so kind to the engine.
Well played sir. Where is that cliff?

She'll be alright at those revs. She won't pull them in top but nothng will break.

 

[snicrep5]

funny. I cant find any web addresses in any of those ads. Like to have the 1983 buyers guide for $3.95. Wonder if they have an app for that.

 

[850 Combat]

Aww crap. I shoulda known I forgot something. That's what I get for studying architecture at my engineering school. Precise, but inaccurate.

Bone stock, you'd need to spin the 850G up to 9,690 rpm's to hit 135 mph.

While 'mathematically' possible, it may not be so kind to the engine.
Well played sir. Where is that cliff?

The problem is power. They don't have enough of it to go 135. Neither does a 1100G for that matter. Neither does a 1000G

I have owned six of them. I own two now. They will not reach red line in top gear. For what its worth, closest to standard is a 120-90 tire, not a 130.

 

[tkent02]

The problem is power. They don't have enough of it to go 135. Neither does a 1100G for that matter. Neither does a 1000G

This is probably where the loss of efficiency inherent in the driveshaft's two ninety degree changes of direction comes into play. The big chain drive bikes will do it.

 

[Tim Tom]

I use a 130 tire so I did the calculations that way.

You are correct though, it all depends on whether or not it can pull to redline in top gear. This has a huge number of factors, and is much harder to compute than the gear ratios.

Only way to do it is test it. I could have sworn that my GS has pulled up to redline in top gear before. Could be something to do with me being a skinny ass, or an optimistic memory. Who knows

 

[Allie]

I use a 130 tire so I did the calculations that way.

You are correct though, it all depends on whether or not it can pull to redline in top gear. This has a huge number of factors, and is much harder to compute than the gear ratios.

Only way to do it is test it. I could have sworn that my GS has pulled up to redline in top gear before. Could be something to do with me being a skinny ass, or an optimistic memory. Who knows

There may be a huge amount of factors but the overriding factor for me is I ain't gettin on no bike and going no 135mph nowhere on no street no how. Nope. Ain't doing it.