BB Turbo and efficiency
Thread Starter
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Cargo Master
Joined: Jan 2005
Posts: 2,902
Likes: 2
From: Pasadena, Maryland
BB Turbo and efficiency
With the price of diesel going up more and more every day, I'm trying to come up with new ways to save fuel. I purchased a GTP-38R (BB) last year and still havent found time to install it. My question is, is it as efficient as a stock turbo? or more to the point. Will I use more fuel by installing this? I have a 99.5 CC ZF-6 that RARELY do I take above 2k rpm. In other words, I granddaddy this thing. Any insight would be greatly apprieciated.
Duncan
Duncan
Fleet Owner
Joined: Jun 2004
Posts: 25,090
Likes: 1,111
From: Rio Rico, AZ.
I think it would depend on how you use the truck.
Pulling loads all the time, yes it would help, but if you drive empty a lot, I think a smaller turbo would provide better spool-up. That would give you more boosht, putting the engine into a more efficient mode of operation.
But there is the tradeoff of reducing drive pressure as well.
Hard to say, really.
Pulling loads all the time, yes it would help, but if you drive empty a lot, I think a smaller turbo would provide better spool-up. That would give you more boosht, putting the engine into a more efficient mode of operation.
But there is the tradeoff of reducing drive pressure as well.
Hard to say, really.
Thread Starter
|
Cargo Master
Joined: Jan 2005
Posts: 2,902
Likes: 2
From: Pasadena, Maryland
I think it would depend on how you use the truck.
Pulling loads all the time, yes it would help, but if you drive empty a lot, I think a smaller turbo would provide better spool-up. That would give you more boosht, putting the engine into a more efficient mode of operation.
But there is the tradeoff of reducing drive pressure as well.
Hard to say, really.
Pulling loads all the time, yes it would help, but if you drive empty a lot, I think a smaller turbo would provide better spool-up. That would give you more boosht, putting the engine into a more efficient mode of operation.
But there is the tradeoff of reducing drive pressure as well.
Hard to say, really.
I drive it empty 90% of the time. If my stock turbo is more efficient, I'll just stay with it and sell the BB. The drive pressure, I think, will be the determining factor.
Elder User
Joined: May 2008
Posts: 860
Likes: 2
From: Liberty Lake, WA
Same here.. No change either up or down..
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FTE Leadership Emeritus
Joined: May 2001
Posts: 13,653
Likes: 6
From: Cabot, Arkansas
That is an excellent point that gets overlooked far too often. With a "90%" empty truck dropping to a 3.55 or even a 3.08 gearset would make a big difference in the fuel economy.
Of course....even if it improved by 3-4 MPG it would still take a long time to recoup the cost of the gear change.
Of course....even if it improved by 3-4 MPG it would still take a long time to recoup the cost of the gear change.
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