Turbo lag ??
Laughing Gas
Joined: Apr 2002
Posts: 1,007
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From: Newport News
Turbo lag is the delay in time that it takes for the turbo to spool up and start pushing boost. I don't know about the 6.0's but my 7.3 takes a quick second to spool up and get the boost pushin through. Usually it will hover around 2-3 PSI on the guage until the exhuast builds up enough force to get the compressor wheel to spin and suck some air in. Not the most technical explaination, but it makes sense to me. 
Terry
Terry
Post Fiend
Joined: Aug 2002
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From: Denton,TX
The 7.3 PSD's without an intercooler don't have turbo lag. The 7.3 PSD's with an intercooler do have a tubo lag. The main reason for the new turbo in the 6.0 PSD is to help eliminate turbo lag and allow it to spool up faster.
Postmaster
Joined: Aug 2003
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From: Central Texas
Turbo Lag is the term used to describe the amount of time it takes from when you push on the accelerator and when the engine produces the expected output. Because of various technology this time is greatly reduced. Turbo lag is also a matter of perception. All turbo systems have lag, just some more than others. There are a bunch of technical factors that will affect it as well.
Post Fiend
Joined: Aug 2002
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From: Denton,TX
Originally Posted by Tim Lamkin
Driving a 6.0 is very different than a 7.3, IMO.
The 6.0 is a higher RPM motor and therefore...............is usually said to have more TL
The 6.0 is a higher RPM motor and therefore...............is usually said to have more TL
FTE Leadership Emeritus
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From: 3rd Rock
Originally Posted by johnsdiesel
I'm not sure I agree with you. High RPM doesn't really have much to do with it. Turbo lag has to do with the "delay" before the turbo spools up. Items such as an intercooler increase turbo lag. My "old" 7.3, for example, has no noticeable turbo lag because it doesn't have an intercooler. The "new" 7.3's do have a noticeable turbo lag because there is an intercooler. The turbo designe on the new 6.0 is designed to help reduce turbo lag and allow the turbo to spool up quicker with less fuel, thus the variable design. So yes, the 6.0 has turbo lag, but it should be less noticeable than the "new" style 7.3 engines. Obviously the turbo spins faster when more fuel is being used, but this should not be confused with turbo lag.
Higher RPM does have some to do with it and, physical distance has to do with it also. i.e. the length of piping on system.
That is a misunderstood term….. Turbo lag
I wrote "is usually said to have more TL" I did not write it.. I only repeted it.
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Post Fiend
Joined: Aug 2002
Posts: 5,324
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From: Denton,TX
Originally Posted by Tim Lamkin
Higher RPM does have some to do with it and, physical distance has to do with it also. i.e. the length of piping on system.
That is a misunderstood term….. Turbo lag
I wrote "is usually said to have more TL" I did not write it.. I only repeted it.
That is a misunderstood term….. Turbo lag
I wrote "is usually said to have more TL" I did not write it.. I only repeted it.
Theretically the 6.0 should have less turbo lag than the 7.3 did though. You are correct, turbo lag is often misunderstood and a lot of people think it means when the engine starts to take off at higher RPM. That's not what it means though.
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From: 3rd Rock
Originally Posted by johnsdiesel
Point taken.
Theretically the 6.0 should have less turbo lag than the 7.3 did though. You are correct, turbo lag is often misunderstood and a lot of people think it means when the engine starts to take off at higher RPM. That's not what it means though.
Theretically the 6.0 should have less turbo lag than the 7.3 did though. You are correct, turbo lag is often misunderstood and a lot of people think it means when the engine starts to take off at higher RPM. That's not what it means though.
In theory the 6.0 is supposed to have less; I actually think that is a very debatable issue.
Post Fiend
Joined: Aug 2002
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From: Denton,TX
Originally Posted by Tim Lamkin
You are absolutely correct this issue is a big one with the 6.0.
In theory the 6.0 is supposed to have less; I actually think that is a very debatable issue.
In theory the 6.0 is supposed to have less; I actually think that is a very debatable issue.
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From: 3rd Rock
One of the interesting items to deal with on the 6.0 is its drivability.
It could almost use a manual to read and then drive…… with a special section on the 1/2” travel and 2/4 seconds before anything gets going with the motor…..after 1650 rpm.
It could almost use a manual to read and then drive…… with a special section on the 1/2” travel and 2/4 seconds before anything gets going with the motor…..after 1650 rpm.
Postmaster
Joined: Aug 2003
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From: Central Texas
Unfortunately, perception is reality. Turbo lag to some people is the difference between when their brain thinks they need the power and when the brain perceives the power showed up. If that time is too great, it is the trucks fault. 
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From: 3rd Rock
Originally Posted by SBV45
Unfortunately, perception is reality. Turbo lag to some people is the difference between when their brain thinks they need the power and when the brain perceives the power showed up. If that time is too great, it is the trucks fault.
so my brain says now, -TL / - PSU = 2/4 seconds <>Pr
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From: 3rd Rock
Originally Posted by International Tech
the 6.0 should have little to no turbo lag. Reason being is because its an EVRT turbocharger.