mike@haller's
New member
True but your total boost isn't where his is. Your really comparing apples to oranges.
Update on my rig
- Thread starter Erikclaw
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True but your total boost isn't where his is. Your really comparing apples to oranges.
jdgleason
Active member
That's true, but his total boost is 30psi higher than Mal's and Shone's old truck...
Not really comparing, just don't think turbos are my power issue.
Meniacal_Mark
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You should definetly be close to a grand with those turbos.
2good2Btru
Member
What is his total boost?
Your back pressure is way high compared to your boost, and one thing your not looking at is back pressure between stages. With 40 psi from the atmo i would be willing to be that your back pressure is 50 or 60 psi between stages and say with 80 psi total that doesnt leave much room for your high pressure to make much boost. Its air in and air out if there isnt much room for air out the turbine slows way down hince why your total boost is low. You might stick a pressure gauge between stages and check that. Im betting its high.
I thought you said it it made 910 in tadds little truck? didnt that truck also have a different cam?
You really thought you were going to make 1000 hp on fuel?
not speaking for jd but i think around 65 psi... seams like high powers. max powers ect all get stuck at that amount of boost. Open up the turbine side and all of a sudden you are up to 70+ psi.
My honest opinion is 850-900 is all they will do with that little 82mm turbine.
jdgleason
Active member
My Bp to boost is too high? 70 psi boost to 72 psi bp? I don't follow that. If back pressure in between stages was ridiculous high, that's going to in overall back pressure since its flow...
Peak power was 4 digits IIRC. I know they picked up 150+ hp with gating into the atmosphere....
Turbine is an 84. 1mm smaller than the turbine in the max powers.
So what are you getting at? How come yours never made 1000 with a big ass turbine then? More fuel and 15 psi more boost than mine makes and it was right with Mal's. I remember initially your set up made 850 in your black truck, and you worked some sh1t out and it broke 900. I guess I just don't get what you're after with me. Regardless of a 4 digit number, it doesn't make the power it should, and hasn't made the power those turbos have already made.
I was under the impression your boost on the Dyno was lower than that?
My set up only ever made 73 psi of boost with 70 psi back pressure in my white truck. I never expected anything over 850 and was never upset it didn't make more. This was all with a waste gate shut off. Mike is the one that is making 85 psi. This was all with only 33 psi from the low pressure. I never wanted a 1000 horse I just happened to pick up a big ass turbo for 300 bucks and made it work. That's all it amounted too. 4 of my atomos were designed for a 12 cylinder engine and 1700 hp total I never expected 1 turbo to support 1000 on its own.
I'm not knocking you but I think your numbers match the turbos imho
ncollins64
Well-known member
I'm just curious and not trying to argue with anybody. But if all this info is correct how or why did shones and Mals trucks make more than JDs if JDs has more air than there's did. I'm just trying to understand
ncollins64
Well-known member
So 1mm could make that much differance?
ncollins64
Well-known member
I'm just trying to learn about all the stuff that can effect things. Not trying to argue with anyone.
jdgleason
Active member
No sir, mine made 70 total and 47 out of the atmosphere... We actually backed the gate off to bring the atmosphere boost down just a bit. It seems that we could have driven the atmosphere a few psi harder, but it didn't seem to gain power.
My bad, I thought your truck was making 85 with the bigger nozzles... Thought I read that about the stock IC somewhere. Regardless, my truck has really never seemed to make sense when it came to fuel only power - by that I mean it's never made what I or anyone else really thought it should. To me it seems like that has carried over into this setup...
jdgleason
Active member
Mines a .96 housing and Mal's is 1.12 I believe
ncollins64
Well-known member
So I take it mine is a 1.12 also with an 85mm wheel?
What I'm getting at is yoj don't have all the facts. I would check pressure between the low and high pressure on the hot side. When you make 47 psi of boost is the back pressure 57? Or is it 47? To me it makes sense that back pressure is high there. Without comparing that to eriks or mals we won't reallg know. I'll be honest I never checked on mine because it always worked fine I thought. And it lived.
I wouldn't worry about your fuel only numbers you live at 6000 feet it's never going to fully add up.
I wouldn't worry about your fuel only numbers you live at 6000 feet it's never going to fully add up.
