Is J2807 worthless?
A recent thread was locked due to brand bickering. Before I got a chance to respond to the latest turn of the conversation. It was stated that J2807 a worthless standard by a few people... Primaril...
Forum Discussion
I've deleted a few, should delete a few more.
KEEP your post to why or why not you like the new specs. It snot a why is ford or gm or dodge or whatever not following them.
Also, it is not a pass or fail! if a rig can not do the min 12% grade with a 10K trailer initial start on that 12% grade, it fails per say, but if it does it with a 9K trailer, it can be rated to 9K per the remainder of the specs.
Problem I have, is some of us pull greater than 12% grades. I've had a client with a 33% grade driveway. There should be a way as part of this std if you will, to know how much you should lower this in my book "unrealistic" size of a trailer so that I can pull a 33% grade, or at least what might be a 15, 20, 25, 30, 35 etc. One can do this with Medium and Heavy duty trucks. I do not see why I should not be able to do this with a light duty truck.
I got a 3 page print out of how fast, what grade etc I would be going in all 7 gears of my navistar when I bought it. In the lowest three gears it will out do my old 05 GM dmax. Then again, the dmax was literally stalled out due to lack of low end gearing. But on the freeway at 30K lbs, on a 3% grade, it was 2 gears tall, and 20 mph faster. Then again, it had 150 more hp! but that extra HP and double the torque did not help it at 30K total on a 30% grade. The dmax did not have the balls. Did not have the balls at 20K lbs either. My old 6.5td gm did tho!
As far as speeds on a freeway. The minimum should be higher. The 35 mph does not meet many states minimums on an interstate of 40 mph. I know of a couple that are 45 mph. Not willing to go as high as 55 as shiner. I can understand why, but if we are talking minimum, then it should be a legal minimum! which is about 40-45 depending.
Gradability, I would prefer to see at least 20%, Dodge at one time was the ONLY manufacture to state that there rigs could go up a 20% grade at the gcwr. NO BODY else said anything as to performance of a given rig, as to how they came up with ratings.
To a degree, the current specs are better than nothing. I do not see them as being realistic from what many of us would can reasonable. Even an 18wheelers setup for OTR work have stiffer specs than pikcumups with this rating! We will not discuss rigs setup to potentially go off road like dump trucks, local deliver garbage trucks etc. Top end is not as good, but 60-80% grades to be pulled....40degrees for those not understanding % grades. 100% is a 45 degree angle, ie 1 unit of rise, per 1 unit of run.
Marty
KEEP your post to why or why not you like the new specs. It snot a why is ford or gm or dodge or whatever not following them.
Also, it is not a pass or fail! if a rig can not do the min 12% grade with a 10K trailer initial start on that 12% grade, it fails per say, but if it does it with a 9K trailer, it can be rated to 9K per the remainder of the specs.
Problem I have, is some of us pull greater than 12% grades. I've had a client with a 33% grade driveway. There should be a way as part of this std if you will, to know how much you should lower this in my book "unrealistic" size of a trailer so that I can pull a 33% grade, or at least what might be a 15, 20, 25, 30, 35 etc. One can do this with Medium and Heavy duty trucks. I do not see why I should not be able to do this with a light duty truck.
I got a 3 page print out of how fast, what grade etc I would be going in all 7 gears of my navistar when I bought it. In the lowest three gears it will out do my old 05 GM dmax. Then again, the dmax was literally stalled out due to lack of low end gearing. But on the freeway at 30K lbs, on a 3% grade, it was 2 gears tall, and 20 mph faster. Then again, it had 150 more hp! but that extra HP and double the torque did not help it at 30K total on a 30% grade. The dmax did not have the balls. Did not have the balls at 20K lbs either. My old 6.5td gm did tho!
As far as speeds on a freeway. The minimum should be higher. The 35 mph does not meet many states minimums on an interstate of 40 mph. I know of a couple that are 45 mph. Not willing to go as high as 55 as shiner. I can understand why, but if we are talking minimum, then it should be a legal minimum! which is about 40-45 depending.
Gradability, I would prefer to see at least 20%, Dodge at one time was the ONLY manufacture to state that there rigs could go up a 20% grade at the gcwr. NO BODY else said anything as to performance of a given rig, as to how they came up with ratings.
To a degree, the current specs are better than nothing. I do not see them as being realistic from what many of us would can reasonable. Even an 18wheelers setup for OTR work have stiffer specs than pikcumups with this rating! We will not discuss rigs setup to potentially go off road like dump trucks, local deliver garbage trucks etc. Top end is not as good, but 60-80% grades to be pulled....40degrees for those not understanding % grades. 100% is a 45 degree angle, ie 1 unit of rise, per 1 unit of run.
Marty
