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#541
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now that i think about it, running my heater hoses like i did really didnt do much for bypassing and if i put a freeze plug in the bypass, its going to cause issues as the water wont have anywhere to go in the block. hmmmm guess ill be changing that! EDIT: yup, im gunna need to swap heat hoses so that one end attaches to the upper rad hose and the other feeds off the factory port to the side of the thermostats. then block off the lower rad hose line that use to go to the heater core. that should keep water flowing through the rad even when the bypass is blocked. my reasonings are different than yours though. im trying to keep some water flowing through the radiator when thermostats are closed to keep the trans heat exchanger cooler for the long grade braking i do. apparently 315+psi line pressure and grade braking at 4k rpm likes to get things hot lol
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James 02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo" 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 ![]() Tailgate Crew Member #4 Last edited by Chevy1925; 09-21-2018 at 09:41 AM. |
#542
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I'm not sure but 130 something degrees comes to mind for the turbo thermostat. Maybe 132*
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2008 Chevrolet 3500HD DRW LTZ 285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L. 2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm |
#543
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The resivoir on 2000hp cats isn't really that big, the raw water pumps are more important, volume of flow will need to be determined to keep them in optimal range. Are you going electric or parisitic off engines?
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2010 GMC 1500 RCSB Denali Clone < lifted 22's/33's, Kooks, Magnaflow, 5.3, 6l80, TVS1900 @ 15#'s, BTR top end and boost cam, Trunion upgrade, 90mm, 10% over, 2.8 griptec, 65lb sticks, Mayhem built/tuned. 2016 LML CCSB Denali < Lifted 22's/35's, Fox 2.0 < I officially need help. ![]() |
#544
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Angle of this thermostat port tends to lean towards flowing from rad side to engine doesn't it? No temp rating on outside.
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#545
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The more i think on it, the more i think so. It will flow from the upper rad hose, to turbo, back to bypass tube at all times regardless of thermostat position.
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James 02 LB7, LLY, LBZ, LMM, LML, L5P 2500HD CC/LB dmax/alli "The Limo" 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 ![]() Tailgate Crew Member #4 |
#546
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The 1.25 feeds 40gpm into oil, transmission, and drive coolers then exit to exhaust manifolds. ![]() ![]() ![]() Sent from my SAMSUNG-SM-G890A using Tapatalk |
#547
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This one shouldn't slow things down much. But I will check in/out temps on water side at wide open to calculate efficiency of the main cooler and electric engine circ pump configuration.
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#548
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How are you drawing in raw water?
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2010 GMC 1500 RCSB Denali Clone < lifted 22's/33's, Kooks, Magnaflow, 5.3, 6l80, TVS1900 @ 15#'s, BTR top end and boost cam, Trunion upgrade, 90mm, 10% over, 2.8 griptec, 65lb sticks, Mayhem built/tuned. 2016 LML CCSB Denali < Lifted 22's/35's, Fox 2.0 < I officially need help. ![]() |
#549
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Pickup in transom, with adjustable height. Then a pressure relief valve in the sea strainer. So inlet hose to pump is pressurized at speed.
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#550
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The factory coolant path to the turbo works pretty screwy. The turbo only gets cooling after the bypass has fully closed at 212 degrees, and the turbo stat is designed to hold the turbo coolant around 225 degrees iirc. If you look at the system, it actually pulls coolant from the upper radiator hose back through the turbo t-stat, turbo, and then back to the bypass tube. Once the t-stat bypass closes, the water pump creates a vacuum on the bypass to do this. When the stats are closed you get a tiny amount of coolant flow through the turbo and back out the upper radiator hose, but it isn't but an air bleed flowing it.
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1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that, DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit. ![]() |
#551
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Thanks for that breakdown. I knew the design sucked, but now we know it's literal..
If I recall, they didn't add that thermostat to the top hose till LBZ? So just guessing, but maybe GM is trying to bring turbo temps up to stop the VNT blades from sticking. Obviously some reason they wanted it running hotter, and ya don't hear much about gummed up turbos after the LLY. I'll try and shoot some temps off those cooling lines once both thermostats are opened, and see if it's still flowing good. Since I stacked my adapter plate under the factory thermostat housing, I have room to hog out the flow area a bit. My only concern is once the back thermostat opens, it might stop the flow through the turbo lines. I can always dump it directly into the reservoir tank, once I iron out the size and placement. |
#552
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They all got it at least through the lmm. But it's a really screwy design how it flows one way when the stats are not fully open and the bypass is flowing, then reverses flow once the bypass closes.
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1995 GMC 2500 SUBURBAN powered by 01 DURAMAX/ALLISON, little of this, a little of that, DIAMONDEYE 4" exhaust, CORSA muffler, AFE stage 1 dry filter, custom tuning by me, KENNEDY single pump and pump rub kit. ![]() |
#553
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Time to play name that sensor.
I first attempted to tap an oil Galley plug but didn't work out. ![]() ![]() Sent from my SAMSUNG-SM-G890A using Tapatalk |
#554
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Looks like a liquid (coolant) temperature sensor to me
Using it to monitor oil temps?
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2008 Chevrolet 3500HD DRW LTZ 285/75/17 Nitto Dura Grapplers, 4.56 gears, Front and rear ARB lockers, Efi Live tuning by me, Raptor 160 LP, Cognito 4-6 NTB Lift, 4" Exhaust, Built Trans by Mike L. 2006 BRM Jetta TDI. Injectors, turbo, Malone custom tuning on ecm and tcm |
#555
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Hint..
It's oem Dmax, has an oring seal, but scaling is not same as ect sensor. So to match ecm tables I chose the factory unit. I've yet to find another sensor with same resistance values and tapered thread. Had to do a little recess in the oil filter housing. ![]() Sent from my SAMSUNG-SM-G890A using Tapatalk |
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