62/65/14 towing questions

Cummins Driver

Cummins Driver

THE Cummins Driver
Joined
May 16, 2007
Messages
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I have heard a lot of good on the 62/65/14 chargers for towing, and that they run pretty good on the track too.

My questions are mainly for the 12v and 24v guys running them.

Im curious what RPM they really start to come on in the higher gears with a load and you are pulling up from say 1200rpm? Say you have a load and your in direct or overdrive at 1200rpm and you start to roll into it to get moving without downgearing. What kind of RPM does it take to get 20+psi out of it?

Also, what kind of #2 HP/Torque numbers are people making on them?

And lastly, what do you think of the turbo in general? Likes and dislikes?

Im not looking to buy one anytime soon. I am just curious as to how they act with a load and what a reasonable HP number to expect one to support is. Thanks

Eric
 
Thats the charger I have on my truck and it lights almost as fast as my HX35 does. I really dont know the RPM but its pretty close to stock. I dont have any problems towing heavy with this turbo.
 
i have a 62/65 s300g off of a cat on mine and it acts pretty similar to the hx35 that i had on there.

i made just over 400hp and 791tq last time i went but i still have some tweaking to do and add my intercooler.

i have been told i have enough for 500hp with this turbo.

i pulled about 5k lbs the other day and i cruised between 10 and 15 psi and took nothing to push it to 20-25 depending on how hard i wanted to lay into it. empty i have only seen a max of about 42 psi out of it.

i like it and its a good one to have for the future if you want twins so i have heard
 
how often u towin heavy at 1200?

maybe u should consider putting detroit or simular in ur truck?

'normal' operating range for the 6b is 1800-2300 rpm
 
Yeah, Im sure most pullers and racers try to run in that "normal" operating range of 1800-2300rpm.

This is COMPETITION diesel.com. We arent talking about stock trucks, and normal operating conditions. I know that its going to tow better at 1800rpm than at 1200rpm. But, living where I live. A lot of my towing is on country roads where im running 50-60mph or so in overdrive at fairly low RPM. And at other times im running 35mph or so in 3rd gear at 1200-1400rpm. My truck will pull pretty well up out of 1400rpm right now, and I dont want something that is going to be dead on the bottom end until 1800rpm.

Maybe instead of trying to hot rod your truck, you should put an N14 cummins in it that way it already has a lot of power and it will make it under normal conditions.

I appreciate the repsonses from people who give reasonable answers and information. Thanks

Eric
 
hope that wasnt directed at me i seen the question about using it for towing so i gave my .02 on that and what i thought about the turbo i have.

if i remember correctly my peak tq was at around 2200 rpms. they started my dyno run around 800 rpms and rolled into the throttle and it lit and took off around 12-1400 rpms.
 
Cummins Driver said:
Say you have a load and your in overdrive at 1200rpm and you start to roll into it to get moving without downgearing.

Eric
Click to expand...

it was directed at eric

these motors dont like that

there is a lever the steering column

and there should be a button somewheres for o.d.

trying to lug these things around just produces a bunch of heat and wear

that is all i was saying
 
DTanklage said:
it was directed at eric

these motors dont like that

there is a lever the steering column

and there should be a button somewheres for o.d.

trying to lug these things around just produces a bunch of heat and wear

that is all i was saying
Click to expand...



just because you are towing at a low rpm doesnt mean that you are producing a lot of heat. some people do know how to tow in od.:poke: i know a lot of people that tow in the 15-1700 rpm. should i advise them not to do it cause you said its a bad idea?
 
if your towing alot around those rpms i would also do a cam it will help with spool up and you could run a 62/71/12 or 13ss and get the same if not better spool up and little better air quality. another thing is you can run either the stocker or a 62/65/14 or 62/71/ 12 or 13ss over a k31 twin set up the spool up would be quick and good for towing.
 
DTanklage said:
it was directed at eric

these motors dont like that

there is a lever the steering column

and there should be a button somewheres for o.d.

trying to lug these things around just produces a bunch of heat and wear

that is all i was saying
Click to expand...


I have worn the letters off of my O/D button. Believe me. I know how and when to use it.

How does towing at lower RPM create more wear than running at say, 2200-2400rpm. I can tow 12-15k lbs in overdrive around 55mph and 1500rpm at about 1000*.

Last i checked, more RPM spun the bearings faster, and made the pistons go up and down more creating more wear?

Now if i am accelerating with 15k lbs, I dont make it a habit to pull up from 1200rpm in overdrive. But, pulling up from 1200rpm in 3rd gear is no problem if i roll into the throttle as the turbo lights. If its a light load though, pulling up from 1200rpm in overdrive is not a problem either.

I have yet to find a problem towing in the lower RPM in the 80k miles I have owned my truck.

Eric
 
there is a big difference between 1200 and 1600

i personally would not tow at either

you all know best and think i am an idiot so keep on truckin

don

ps - good thing you guys werent around for the first gen era

try to tow a getrag at 15-1700 and see how far ya get
 
SKYNYRD said:
if your towing alot around those rpms i would also do a cam it will help with spool up and you could run a 62/71/12 or 13ss and get the same if not better spool up and little better air quality. another thing is you can run either the stocker or a 62/65/14 or 62/71/ 12 or 13ss over a k31 twin set up the spool up would be quick and good for towing.
Click to expand...


I had thought about twins, but i like to pull every now and then, and i dont think i want to mess with all the piping.

I would like to do a cam at some point though. I might just tear it on apart when i do my head and stick a cam in it depending on when it is. Its definately something i would like to do down the road.

Thanks

Eric
 
DTanklage said:
there is a big difference between 1200 and 1600

i personally would not tow at either

you all know best and think i am an idiot so keep on truckin

don

ps - good thing you guys werent around for the first gen era

try to tow a getrag at 15-1700 and see how far ya get
Click to expand...



Why do you think i would be accelerating from 1200rpm? Its to get to 1500-1600rpm:bang

I was asking about a specific turbo and you came in and started telling me how i should be towing and trying to act like I am doing it all wrong. Dont get all hurt and feel sorry for yourself when i disagree with you.

What RPM do you tow at, and how do you get there? Do you wind it up to 3200rpm and ride out the clutch so that you arent lugging it?

Eric
 
Cummins Driver said:
I had thought about twins, but i like to pull every now and then, and i dont think i want to mess with all the piping.

I would like to do a cam at some point though. I might just tear it on apart when i do my head and stick a cam in it depending on when it is. Its definately something i would like to do down the road.

Thanks

Eric
Click to expand...

to be honest with you the HD cam i installed is spooling my 62/71/14 about 300 rpms faster i have a k31 and 2nd gen manifold to start building my twins.
 
I have installed and had dealings with a Helix 2 and I was really impressed with how much smoother the motor sounded.

Eric
 
i towed with a II 62/65/14 on a 97 12v for almost a year. my egts only got hot when i got impatient or when i wanted to push the issue. this was with a stock cam. spool was a bit slow, but it was a good turbo to tow and have fun with.
 
Cummins Driver said:
Dont get all hurt and feel sorry for yourself when i disagree with you.

What RPM do you tow at, and how do you get there? Do you wind it up to 3200rpm and ride out the clutch so that you arent lugging it?

Eric
Click to expand...

dont worry - i wont

when i tow i roll the scales at 22.5k#. on the highway around here i use 4th gear (nv-4500) and 2150 rpm. i put a gear vendors splitter behind the 4500 cuz of how the 5th gear is attached to its shaft, the output shaft. you can not tow that heavy in 5th or it will fall apart, even if you have the best parts avail and i do. that being said i tow in 4th. around here (LA area) i use 4th under. 4th under 2150 rpm is good for 58 mph. once i get out of town i use 4th over. 4th over 2150 is good for 79 mph. and it will pull a 6% grade in 4th over @ 22.5k# like no tomorrow. how do i get up to 2150 rpm in 4th over? granny low, 2nd under, 2nd over, 3rd under, 3rd over, 4th under, 4th over. never have to go over under 1800 except when its rollin less than 3 mph and never have to go over 2500 unless i want to go over 100 mph and i have only done that once with the trailer attached

i put 4k gov springs in it so now i really dont even need the gv....but its there so i use it, easier on the motor and besides, i like shiftin

autos are for drag racin

manuals are for drag'in stuff around

ps - the only way any of my buddies can beat me home from the track is if they go out in the early rounds. if we both leave the track at the same time they dont stand a chance! i love my truck : ) hope you have as good of luck with yours...
 
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Cummins Driver said:
I have worn the letters off of my O/D button. Believe me. I know how and when to use it.

How does towing at lower RPM create more wear than running at say, 2200-2400rpm. I can tow 12-15k lbs in overdrive around 55mph and 1500rpm at about 1000*.

Last i checked, more RPM spun the bearings faster, and made the pistons go up and down more creating more wear?

Now if i am accelerating with 15k lbs, I dont make it a habit to pull up from 1200rpm in overdrive. But, pulling up from 1200rpm in 3rd gear is no problem if i roll into the throttle as the turbo lights. If its a light load though, pulling up from 1200rpm in overdrive is not a problem either.

I have yet to find a problem towing in the lower RPM in the 80k miles I have owned my truck.

Eric
Click to expand...

1000F at 1500 RPM sounds like lugging to me. More heat into pistons with less oil flow rate cooling them because of lower RPM. More cylinder pressure per combustion event pushing harder on rings and walls, more stress on oil. I never tow in OD unless going at least 60mph, but if I need to pull much of a hill I drop right down to Drive and let 'er run at 2400-2500. IMO the engine will last longer spinning at 2300 RPM with low EGT vs 1500 and staying at 1000 all the time. At higher RPM you spread the work out over more combustion events. 2300 RPM in itself isn't going to cause a measurable increase in wear, lugging at 1500 I think will cause more rapid wear. I don't think it's good to fuel it much under about 1700 RPM.

As for accelerating, with a load I generally start around 1500 and shift at 2400-2900, depending on load and rate of acceleration.
 
Don I think youre kind of mis understanding what Eric is talking about. He is just posing a hypothetical situation to see how the turbo would behave compared to an hx35 or the current hx40 that he is running. Hes not talking about towing constantly at 1200rpm and just lugging the motor all the time. Just for those situations when you have to slow down and then accelerate again on curvy backroads or on the highway. Basically he just wants to know how well and at what RPM they begin to spool.
 
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