Author Topic: 0 - 60 times - lets hear them...  (Read 7791 times)

Offline RTS/Daytona

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Re: 0 - 60 times - lets hear them...
« Reply #15 on: February 26, 2010, 02:17:16 PM »
The RTS is one of most Aerodynamic transit bus made

It has a drag Drag Coefficient of 0.55 and a Rolling Resistance Coefficient 0.011   see-> http://www.perthelectricvehicle.com.au/linksbus.php

Thats somewhere between an Original VW Bug at .48   and  Hummer H2 at .57   (lower egual less drag) see-> http://en.wikipedia.org/wiki/Automobile_drag_coefficient

Most trucks  +.6    -   

My last M/H  (1976 Classic GMC 26' MotorHome)  .31  (same as a current Z06 Corvette)

and

Less than 10' height

single axel rear wheels

2250 RPM equals 76 MPH - (4.10 differential - .88 to 1 finial gear geraing V731 tranny) = effective 3.60 final drive in 3rd (final gear - 3 speed tranny)

I have 24.5 tires (although that sounds a lot taller - they are not that much taller)
« Last Edit: February 26, 2010, 02:31:58 PM by RTS/Daytona »
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Offline RJ

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Re: 0 - 60 times - lets hear them...
« Reply #16 on: February 26, 2010, 02:31:52 PM »
John -

Pete snuck in with an answer before I could post mine, but here's the KISS version:


Couple of differences between your Crown and Pete's RTS easily account for the difference in fuel mileage.

First, even tho you both have 4.10 rear axles, Pete's V-730 has a 0.87 bevel gear ratio, which gives an overall final drive ratio of 3.567:1  (He's got a V-drive powertrain, compared to your T-drive.) 

Second, Pete's RTS is aerodynamically "cleaner" than your Crown.  Had you an original "twinkie" body style, chances are good that your mileage would equal what Pete's getting.  The price of progress, eh?

FWIW & HTH. . .

 ;)

RJ Long
PD4106-2784 No More
S13406 1978 MC-5C Converted 6V71/MT-644
S14947 1980 MC-5C Shell 6V92/HT-740
Cheney WA

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Re: 0 - 60 times - lets hear them...
« Reply #17 on: February 26, 2010, 05:52:22 PM »
Ed, the snow leaves at different times each year, last year summer came early, it was on a tuesday. lol

Offline Iceni John

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Re: 0 - 60 times - lets hear them...
« Reply #18 on: February 26, 2010, 06:03:08 PM »
Thanks for those explanations.   Unless I can find a 3.7 pumpkin for my axle (yeah, dream on!), I'll just have to live with my 7 to 8 MPG.   I don't and won't drive much, so it's probably not worth spending much to change ratios.

That also explains why folk with twinkie Crowns that have the overdrive Road Rangers are getting up to 12 MPG and/or up to 80 MPH!   However, a mid-engine wouldn't work for me  -  I need the underfloor space.

John
1990 Crown 2R-40N-552 (the Super II):  6V92TAC / DDEC II / Jake,  HT740.     Hecho en Chino.
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Offline jjrbus

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Re: 0 - 60 times - lets hear them...
« Reply #19 on: February 27, 2010, 06:29:43 AM »
With a 6V71 in a MCI5C with a three speed slush box it took a few minutes, even downhill.  But I did get 12 mpg!!    JIm
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Offline viento1

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Re: 0 - 60 times - lets hear them...
« Reply #20 on: February 27, 2010, 03:54:28 PM »
12 mpg... nice - I think that is the best I have heard of.
Ok, it's time to go on another road trip.
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Offline zimtok

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Re: 0 - 60 times - lets hear them...
« Reply #21 on: March 03, 2010, 07:39:17 PM »
Well after 4 runs my average 0-60 time is 70 seconds ......

I tried to pick the most level road conditions. This was at 2am on my way home from a gig. I figured it best not get caught in daily traffic.
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Offline viento1

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Re: 0 - 60 times - lets hear them...
« Reply #22 on: March 03, 2010, 08:55:19 PM »
What is your setup?
Ok, it's time to go on another road trip.
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Offline zimtok

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Re: 0 - 60 times - lets hear them...
« Reply #23 on: March 04, 2010, 07:03:21 AM »
What is your setup?

1960 4104
GVW - 23,420lbs fully loaded with fuel and gear (driver only)
Engine - 6-71, 4valve head, #65 injectors, duel 3" exhaust
Transmission - 4 speed spicer

Top speed per gear: (MPH determined using Magellan GPS)
1st - 16mph
2nd - 26mph
3rd - 42mph
4th - 63mph

Right now with gigs being slow (2-3 gigs a week) I drive about 225 - 275 miles every week. I go two weeks between fuel fill-ups. Fill-ups are averaging about 60-80 gallons diesel and 15-25 gallons generator gas.
I average 6-8mpg. With only about 50-60% of my mileage being highway I'm fairly satisfied...

.
« Last Edit: March 04, 2010, 07:22:11 AM by zimtok »
1960 PD4104-4971 - Memphis TN

Buy the new Eddie L Smith CD "STAYIN LONG" at:
http://www.eddielsmith.com
Everyone is welcome to any of our gigs listed on the website.


Offline Flyboy

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Re: 0 - 60 times - lets hear them...
« Reply #24 on: March 04, 2010, 07:23:35 AM »
I'm saddened by the discriminatory objective and tone of this post. 

As a 4104 owner (671) I feel that in the spirit of equal opportunity, there should be a 0-55 MPH category.

 ;D ;D ;D
IF IT AIN'T BOEING, I'M NOT GOING!

Offline fe2_o3

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Re: 0 - 60 times - lets hear them...
« Reply #25 on: March 04, 2010, 08:50:17 AM »
  I'll post as soon as we make it to 60  First we have to start the toad. Maybe it'll help if it pushes...Cable
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Offline Eric

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Re: 0 - 60 times - lets hear them...
« Reply #26 on: March 04, 2010, 05:14:05 PM »
0-60 in fifteen minutes :) now 0-30 i can hit like a rocket but after my 731 makes 3rd....it's a REALLY long haul!

6v92ta mechanical
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Offline zimtok

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Re: 0 - 60 times - lets hear them...
« Reply #27 on: March 05, 2010, 12:39:06 PM »
I'm saddened by the discriminatory objective and tone of this post. 

As a 4104 owner (671) I feel that in the spirit of equal opportunity, there should be a 0-55 MPH category.

 ;D ;D ;D



So what you're saying, is that your 0-60 time is NEVER..... ;D

There really isn't that much difference between 55mph and 60mph. You could see how much time it took to get from 50 to 55 and then add that time to your 0-55 time. Or just take the 0-55 time and post it with an * next to it.....












.
1960 PD4104-4971 - Memphis TN

Buy the new Eddie L Smith CD "STAYIN LONG" at:
http://www.eddielsmith.com
Everyone is welcome to any of our gigs listed on the website.


Offline Flyboy

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Re: 0 - 60 times - lets hear them...
« Reply #28 on: March 05, 2010, 12:50:34 PM »
Hey Zimtok,

'bout the only place for me to go over 60 would be the downhill side of Montgomery Pass BTW Nev and Cal! :o

60's overated anyways...just extra wind noise!! ;D  Come to think of it though, more wind noise might not be such a bad thing.  I'd have an excuse not to listen to the missus and youngins!! 6V92 TA here I come!!!! ;D
IF IT AIN'T BOEING, I'M NOT GOING!