|
07-23-2011, 08:15 PM | #1 |
Senior Member
Join Date: Oct 2002
Location: Mahopac, NY
Posts: 666
Likes: 48
Liked 114 Times in 9 Posts
|
Weight and the converter
Does the weight of a car change the stall of the converter? For example if a converter stallls at 4800 in a 3400 lbs car and you remove 200lbs does it change or stay the same?
__________________
Joe DeMarzo 1317 STK |
07-23-2011, 08:56 PM | #2 |
Senior Member
Join Date: Mar 2007
Location: Canyon, Tx
Posts: 535
Likes: 117
Liked 281 Times in 88 Posts
|
Re: Weight and the converter
The stall of the converter has to do with the horsepower supplied by the engine to the converter and nothing to do with the weight of the car until the car is launched when the converter starts to do its work.
My 2 Cents Rick Cates |
07-23-2011, 09:19 PM | #3 |
VIP Member
Join Date: Oct 2002
Location: On a hilltop in Pa.
Posts: 4,223
Likes: 3,103
Liked 6,791 Times in 1,524 Posts
|
Re: Weight and the converter
Yes, but even though the flash rpm would stay the same, once the car is moving the converter would "act" tighter in the lighter car.
__________________
Billy Nees 1188 STK, SS World's greatest Under-Achiever! |
07-23-2011, 09:33 PM | #4 |
Veteran Member
Join Date: Mar 2005
Location: Sand Springs, OK
Posts: 8,132
Likes: 896
Liked 389 Times in 168 Posts
|
Re: Weight and the converter
Sho 'nuff!
__________________
Ed Wright 4156 SS/JA |
07-23-2011, 10:07 PM | #5 |
VIP Member
Join Date: Jan 2009
Location: Maryland
Posts: 1,712
Likes: 1,404
Liked 372 Times in 80 Posts
|
Re: Weight and the converter
x2
__________________
Bob Bender 144 O/SA 2010-2012 National Record Holder |
07-24-2011, 12:00 PM | #6 |
VIP Member
Join Date: Dec 2001
Location: Texarkana Ark/TX
Posts: 2,351
Likes: 435
Liked 678 Times in 262 Posts
|
Re: Weight and the converter
Billy, Well said!
It will also change the way it works if you change gear ratios. A deeper low gear will make it act like it is tighter.
__________________
Adger Smith (Former SS) |
07-25-2011, 05:10 PM | #7 |
Senior Member
Join Date: Feb 2004
Location: Saint John NB Canada
Posts: 560
Likes: 27
Liked 6 Times in 5 Posts
|
Re: Weight and the converter
Is this because the weight of the car affects the 'force' the converter 'sees'? Or that if the car is heavier, the converter is 'forced' to work harder and will therefore be looser?
|
07-25-2011, 05:43 PM | #8 |
VIP Member
Join Date: Oct 2002
Location: On a hilltop in Pa.
Posts: 4,223
Likes: 3,103
Liked 6,791 Times in 1,524 Posts
|
Re: Weight and the converter
The converter would be loaded for a slightly longer period of time in the heavier car. (200 lbs heavier, same car)
__________________
Billy Nees 1188 STK, SS World's greatest Under-Achiever! |
07-25-2011, 06:33 PM | #9 | |
Veteran Member
Join Date: Mar 2002
Location: Miles From Nowhere
Posts: 7,418
Likes: 2,582
Liked 4,453 Times in 1,694 Posts
|
Re: Weight and the converter
Quote:
A good running Powerglide car does so, in spite of having such a high 1st gear ratio, because the converter is forced to "work harder". As another example pertaining to weight; A street and strip car with a high stall converter,cruising along on the freeway, comes to a hill or rise in the road. The effect of the hill is that the car thinks it's "heavier" and the RPMs will rise, while maintaining the same MPH. You've got to remember,unless it's got a lock up clutch it it, it is a fluid coupling
__________________
We are lucky we don't get as much Government as we pay for..... Will Rogers |
|
07-27-2011, 04:33 PM | #10 | |
Senior Member
Join Date: Jan 2002
Posts: 653
Likes: 8
Liked 238 Times in 25 Posts
|
Re: Weight and the converter
Quote:
At least in our cars, the engine goes past the torque peak then settles down at a lower torque value for flash/stall. And keeping everything equal with gearing and weight, in good air it will flash at a higher rpm with increased torque. |
|
|
|