replacement turbo?
Postmaster
Joined: Jan 2004
Posts: 3,207
Likes: 0
From: Kearney, Nebr
TJ, you'd suggest that the D66 would run 40 pounds? I don't know. If I'm correct the drive pressure for the stocker are around 2:1? Thats a lot when your talking 35+.
Secondary, it sounds like the D66 is right up your alley.
Secondary, it sounds like the D66 is right up your alley.
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
I don't know the exact ration but I just mean that the pressures are more equal than the stocker. One a stock turbo with a 2:1 ration it will require 30 psi exhuast drive pressure to create 15 psi boost pressure. The D66 closes that gap. Just number pulled from thin air but if the d66 is 1.5:1 it would take 22 psi exhuast drive pressure to create 15 psi boost pressure. I would guess that the d66 is closer to 1.5:1 than 1:1
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
I will try to get some numbers for the stocker today. I am sure this has already been done but I don't want to search around to find them. Now that I think about it Neal might have done the drive pressure work once he got his BP gauge hooked up....
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
Rezvani's Latest Post-Apocalytic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
2026 Shelby F-150 Off-Road: Better Than a Raptor R?
Brett Foote
Postmaster
Joined: Jan 2004
Posts: 3,207
Likes: 0
From: Kearney, Nebr
I know in our K-Whopper, you can peg the manifold pressure gauge out at 70. It looks pretty cool to see that needle fly to the right when you spool it up.
Neal probably does, I think I remember him talking about it.
Neal probably does, I think I remember him talking about it.
Post Fiend
Joined: Mar 2007
Posts: 9,010
Likes: 5
From: Johnson City, TN.
Hey Hey Hey I am here guys. I did have a BP gauge on and it seems to fill up with carbon quickly so I disconnected it. I got some info first though. I get almost the same BP as I get boost when pouring the gas to it. I have not done the comparison with the new stage II's though. I would think since the #'s are almost the same stock it is 1:1. Am I thinking right. I am learning with this thread though. It seems odd that BP and boost are almost the same.
Sorry if I got excited but I am on vacation at the beach on the front porch drink in hand and enjoying life as it should be.
Sorry if I got excited but I am on vacation at the beach on the front porch drink in hand and enjoying life as it should be.
Thread Starter
|
Posting Guru
Joined: Feb 2008
Posts: 1,526
Likes: 1
From: Grass Valley, CA
Originally Posted by www.dieselsite.com
Exhaust backpressures or "drive pressures" as they are called in the turbocharger business plays a huge role in how much boost an engine can produce before stress on engine components fail. Drive pressure is the amount of pressure required to "drive" a certain amount of boost with a particular turbo. These numbers can usually be derived into a mathematical equation. For instance, a stock 7.3L turbo has a drive pressure approximately of a 2/1 ratio. This means for every 1 lb of boost, it takes 2 lbs of drive pressure to produce this. So, a stock turbo producing 35 lbs of boost can easily produce 70 lbs of drive pressure. The ballbearing turbos on the market estimate about a 1.75/1 ratio. That same truck with 35 lbs of boost will generate about 61.25 lbs of drive pressure.
so what if you were trying to incorporate a second turbo later? would the d66 fail with a second turbo downstream?
Originally Posted by www.dieselsite.com
Now, this turbo kit has a drive pressure close to 1/1. That means the same boost levels of 35lbs only produce approximately 35lbs of drive pressure. Your head gaskets and rods are greatly relieved of excess pressure. So, for high boost levels and high HP applications, this turbo is a must for long life of engine components
Senior User
Joined: Mar 2007
Posts: 186
Likes: 0
From: Lebanon MO
My question is the d66 reliable enough if i was wanting to make a semi high horsepower engine over time.all i read on here is bad mouthing it because of the thrust bearing. you think it will hold up. say i wanted to pull a sled with it sometime?
Post Fiend
Joined: Apr 2004
Posts: 12,835
Likes: 3
From: Silver Lake Dunes, MI
The D66 has been proven thus far to do what it is advertised to do. There are a few guys running it with stage 3 injectors and it still holding up as well. I will be using a different turbo mainly based on I can build a H2E/HX50 kit cheaper than I can buy a D66.