Duramax Diesels Forum Truck of the Week
  #886  
Old 09-04-2018, 03:29 PM
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Originally Posted by Mike L. View Post
Now I see why you melt gears.
i wasnt joking when i told what this bitch sees when i tow
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  #887  
Old 09-04-2018, 03:44 PM
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8* would be too much for 1000us at 160mpa especially with 40lbs or boost at 2100rpm wouldn’t it? I don’t have my laptop around me today.
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  #888  
Old 09-04-2018, 04:01 PM
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Found my laptop

I would have it at 4.5* to 5* at 2000 rpm and 7* at 2800rpm with 1000us.
Have you tried dropping it down another gear and giving it some rpm. I would think you would want rpm about 3600rpm and see how much air that fan can pull.
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  #889  
Old 09-04-2018, 04:15 PM
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Off topic here but you guys pulling grades made me think of one I encountered over on this side of the country a couple weeks ago.

Adam might know the hill I am talking about outside Portsmouth, Ohio. Short hill but it’s a 19* grade both ways. Freaking insane.
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  #890  
Old 09-04-2018, 04:47 PM
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Originally Posted by gmduramax View Post
Found my laptop

I would have it at 4.5* to 5* at 2000 rpm and 7* at 2800rpm with 1000us.
Have you tried dropping it down another gear and giving it some rpm. I would think you would want rpm about 3600rpm and see how much air that fan can pull.
2000/20 works with stock doesn't work with bigger injectors..

For debate sakes... 100 over shoots double the volume with same rail...
Stock 2000uS at 20*
100 over 1000 @20°
Would be same.. on paper.. problem with bigger injectors is you can cool the cylinder off too much... due to how fast you can put fuel into it...

My guess ~75% of what stock would be would be sweet spot for the 100 overs. Fuel still has to burn in a close chamber

Which would probably change the area it's hitting on the table as well...


Joe on what road?
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  #891  
Old 09-04-2018, 04:58 PM
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Quote:
Originally Posted by malibu795 View Post
2000/20 works with stock doesn't work with bigger injectors..

For debate sakes... 100 over shoots double the volume with same rail...
Stock 2000uS at 20*
100 over 1000 @20°
Would be same.. on paper.. problem with bigger injectors is you can cool the cylinder off too much... due to how fast you can put fuel into it...

My guess ~75% of what stock would be would be sweet spot for the 100 overs. Fuel still has to burn in a close chamber

Which would probably change the area it's hitting on the table as well...


Joe on what road?
Rosemount road.

In between 23 and 139 just north of Portsmouth
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  #892  
Old 09-04-2018, 05:05 PM
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Originally Posted by lutzjk913 View Post
Rosemount road.

In between 23 and 139 just north of Portsmouth
Haven't been on that stretch. Usually run 23 all the way down either to 52/7 or jump across into KY pending where I'm heading
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  #893  
Old 09-04-2018, 05:12 PM
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Originally Posted by malibu795 View Post
Haven't been on that stretch. Usually run 23 all the way down either to 52/7 or jump across into KY pending where I'm heading
the sole reason I took it was to avoid traffic on 52 going into Portsmouth.

Followed a roll back and didn’t think he was going to make it.
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  #894  
Old 09-04-2018, 05:17 PM
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Quote:
Originally Posted by malibu795 View Post
2000/20 works with stock doesn't work with bigger injectors..

For debate sakes... 100 over shoots double the volume with same rail...
Stock 2000uS at 20*
100 over 1000 @20°
Would be same.. on paper.. problem with bigger injectors is you can cool the cylinder off too much... due to how fast you can put fuel into it...

My guess ~75% of what stock would be would be sweet spot for the 100 overs. Fuel still has to burn in a close chamber

Which would probably change the area it's hitting on the table as well...


Joe on what road?

I may have it all wrong, but if you cut pulse in half you also cut timing roughly in half to maintain the percent of the duration being sprayed before top dead center.
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  #895  
Old 09-04-2018, 05:48 PM
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If you're Injecting 10cc of fuel.. just because you can shove it in in 1/2 the original time... doesn't mean it burn twice as fast.
Exaggerated... But gets the point..
Using said 10cc volume say burn time is 3sec.. and stock injection time is 3sec.. we double our injector size which allows us to inject in 1.5sec same 10cc volume..
Burn time is still the same because volume is constant..
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mispeeling wrods n a thraed nere u
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  #896  
Old 09-04-2018, 05:50 PM
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Quote:
Originally Posted by malibu795 View Post
If you're Injecting 10cc of fuel.. just because you can shove it in in 1/2 the original time... doesn't mean it burn twice as fast.
Exaggerated... But gets the point..
Using said 10cc volume say burn time is 3sec.. and stock injection time is 3sec.. we double our injector size which allows us to inject in 1.5sec same 10cc volume..
Burn time is still the same because volume is constant..
Makes perfect sense, something I never thought of
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  #897  
Old 09-04-2018, 06:06 PM
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Do you really expect a newer truck to do the same as yours and then some while keeping everything in check like your asking from your current truck? I just don't see it happening I guess but maybe.

I feel if you buy a new truck, youll lift it, put big tires on it and tune it expecting it to put pull what you already have and I don't think it will keep everything in check like your already dealing with. You literally have all odds against you I feel like lol

From what I know, don't twins really heat the oil up pretty good any ways? Lol try a big single or just a 68stg 2 r or something. Hell idk, it just doesn't make sense to me why your making so much heat, do you have that clutch fan that kicks on sooner? Maybe that would be a helper.
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  #898  
Old 09-04-2018, 06:29 PM
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Quote:
Originally Posted by Yngdmax92 View Post
Do you really expect a newer truck to do the same as yours and then some while keeping everything in check like your asking from your current truck? I just don't see it happening I guess but maybe.

I feel if you buy a new truck, youll lift it, put big tires on it and tune it expecting it to put pull what you already have and I don't think it will keep everything in check like your already dealing with. You literally have all odds against you I feel like lol

From what I know, don't twins really heat the oil up pretty good any ways? Lol try a big single or just a 68stg 2 r or something. Hell idk, it just doesn't make sense to me why your making so much heat, do you have that clutch fan that kicks on sooner? Maybe that would be a helper.
He’s done everything to keep it cool. The cooling systems on the newer trucks are a lot better. If I get the L5P up that way James you’re more than welcome to hook up to it and try it out on some hills before you make the purchase.
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Thanks to Mike L, SoCal Diesel, and Abel Chevorlet.

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  #899  
Old 09-04-2018, 06:34 PM
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Quote:
Originally Posted by gmduramax View Post
Makes perfect sense, something I never thought of
Generally speaking that's the jist of it... I highly doubt the hard parts would last long with fuel shoot in 1/2 the time at the same injection point..

I'm sure there's guys that can and have posted in extreme detail the difference.. and most would ha e their eyes gloss over reading it..
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mispeeling wrods n a thraed nere u
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  #900  
Old 09-04-2018, 06:39 PM
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Quote:
Originally Posted by gmduramax View Post
He’s done everything to keep it cool. The cooling systems on the newer trucks are a lot better. If I get the L5P up that way James you’re more than welcome to hook up to it and try it out on some hills before you make the purchase.

Right ,but the l5P is not making 600hp towing and has alot more Management systems to pull things back where as James is literally just sending it with hsi right foot.
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