Duramax Diesels Forum Truck of the Week
  #16  
Old 09-01-2017, 07:39 AM
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So pin holes are a real thing! Was your engine bored over and was it a daily driver or high performance? Did they have to sleeve it or just fix the spots? Thanks.
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  #17  
Old 09-01-2017, 08:50 AM
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So pin holes are a real thing! Was your engine bored over and was it a daily driver or high performance? Did they have to sleeve it or just fix the spots? Thanks.
Stock bore, stock engine in a 4500. Sleeved both

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  #18  
Old 09-07-2017, 07:12 AM
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Stock bore, stock engine in a 4500. Sleeved both

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Sleeved cyl

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  #19  
Old 09-07-2017, 08:35 AM
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if you are going a max of 800hp, there is no need for main studs but if you want to run them, line hone/bore the mains. it would be a good idea to have it done anyhow to open up oil clearance a smidge and make sure you have 0 issues with out-of-round and taper from the bores. if the machine shop knows what they are doing, they will know there is no over sized bearings for the engine and to be very careful not to take too much out.

personally, i would run fingers pistons as well. the extra cost is worth the piece of mind. if you are not willing to switch, make sure you run a turbo setup that will get you to the 800hp mark with a fueling pulse width that is not very high. this will help the pistons live longer. that 4088 wont be enough, you will need a twin on top of it or something else all together.

i would have the block/crank fluxed and checked over but if it was not burning coolant before or gave signs of it, i wouldnt worry about having it pressure checked. they heads should be pressure checked and gone over well though.

make sure you have the 42160 ring set for the pistons, the 41909 do not use the correct metals to be used in a truck looking for longevity out of them.

Run Clevite H bearings, they will be plenty for you. you can get away with stock or P bearings for the cam if the cam is stock or mild. be sure to key the cam and crank shafts.

who will be assembling it?
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Old 09-07-2017, 09:49 AM
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Sleeved cyl

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What did they change for that


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  #21  
Old 09-07-2017, 09:53 AM
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$130 for the 2 sleeves and $300 for the specific machine work and then an additional $200 to torque plate finish hone all 8

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  #22  
Old 09-07-2017, 10:24 AM
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$130 for the 2 sleeves and $300 for the specific machine work and then an additional $200 to torque plate finish hone all 8

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whats piston to wall clearance now? ive always been concerned with pressing old sleeves out, pressing new ones in and not distorting the cyl next to it to teh point even with a hone, PTW clearance becomes too large. if it needs a sleeve, i usually have the block bored over so everything comes out nice.
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BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

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  #23  
Old 09-07-2017, 10:58 AM
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Originally Posted by Chevy1925 View Post
whats piston to wall clearance now? ive always been concerned with pressing old sleeves out, pressing new ones in and not distorting the cyl next to it to teh point even with a hone, PTW clearance becomes too large. if it needs a sleeve, i usually have the block bored over so everything comes out nice.
.0048

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  #24  
Old 09-07-2017, 12:02 PM
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I see
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BIG THANKS TO: Mike L, Steve, Trent, Guy, Dan, Ruben, Josh H, Scott, Brian and everyone else who has put a hand in to help me.

best time to date: 12.39

motor died/bent rods = 3/11/11
back from the dead 7:04pm 4/9/2012

Limo is back in the garage, now driving a built chevy tracker
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  #25  
Old 09-07-2017, 01:20 PM
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Are there downsides to fingers pistons besides sound and fuel economy or are those both myths as well? Hasn't Mark Broviak pushed them past 1,500HP or something like that?
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  #26  
Old 09-07-2017, 01:44 PM
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Are there downsides to fingers pistons besides sound and fuel economy or are those both myths as well? Hasn't Mark Broviak pushed them past 1,500HP or something like that?
We're going on 2 seasons on our forgd fingers. We run at either 1250 or 1510, depending on which org we pull with.

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  #27  
Old 09-07-2017, 02:46 PM
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Cast for daily driving correct Forged for dedicated race or pulling truck?


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  #28  
Old 09-07-2017, 02:50 PM
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Cast for daily driving correct Forged for dedicated race or pulling truck?


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Yes. Although both could do either. Cast will hold up very well in most applications

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  #29  
Old 09-07-2017, 03:29 PM
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Quote:
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Are there downsides to fingers pistons besides sound and fuel economy or are those both myths as well? Hasn't Mark Broviak pushed them past 1,500HP or something like that?


There is a slight difference in sound, not much... you will notice a drop in fuel economy..... I don't know if you'll notice it as much if your trucks a DD, I've only ever pulled trailer with mine...


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  #30  
Old 09-09-2017, 05:42 PM
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They also smoke more.... good tuning does take care of most of it though. I'm happy I went with cast ovals.
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