Suggestions on building an LQ4 tow rig
09-11-2018, 07:13 PM
#11
If you really look into it, almost every recommendation for towing + boost is supercharger. There have been a few people who went outside the usual here and built turbo trucks for towing duty with success but not many examples that I have come across.
09-11-2018, 07:17 PM
#12
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That's pretty much the opposite of what I have read. You want a supercharger for the instant torque, which is beneficial for towing applications. You get your load up to speed faster and with any hills or extra power needs you have the power on tap, but generally you aren't in boost and shouldn't be, as then you are sucking down the fuel. Heat can be a problem with either (turbo/supercharger) but there are ways to mitigate it. Turbos work differently in a diesel application where they can work in high boost conditions pretty much all the time.
If you really look into it, almost every recommendation for towing + boost is supercharger. There have been a few people who went outside the usual here and built turbo trucks for towing duty with success but not many examples that I have come across.
If you really look into it, almost every recommendation for towing + boost is supercharger. There have been a few people who went outside the usual here and built turbo trucks for towing duty with success but not many examples that I have come across.
Also, centrifugal or roots style supercharger?
09-12-2018, 08:44 AM
#13
Roots, with an intercooler
<10psi and you'll be fine provided you have the fuel system and tuning to accommodate.
Ive towed a bunch with a P1, and with the 5.3 it was fine because lil girl needed some RPM anyway, but 10/10 suggest a roots. I too am putting together an LSA setup. Was saving it for my 408, but I think its destined for my 5.3 and my 408 may have a price tag on it.
<10psi and you'll be fine provided you have the fuel system and tuning to accommodate.
Ive towed a bunch with a P1, and with the 5.3 it was fine because lil girl needed some RPM anyway, but 10/10 suggest a roots. I too am putting together an LSA setup. Was saving it for my 408, but I think its destined for my 5.3 and my 408 may have a price tag on it.
09-12-2018, 08:54 AM
#14
That's pretty much the opposite of what I have read. You want a supercharger for the instant torque, which is beneficial for towing applications. You get your load up to speed faster and with any hills or extra power needs you have the power on tap, but generally you aren't in boost and shouldn't be, as then you are sucking down the fuel. Heat can be a problem with either (turbo/supercharger) but there are ways to mitigate it. Turbos work differently in a diesel application where they can work in high boost conditions pretty much all the time.
If you really look into it, almost every recommendation for towing + boost is supercharger. There have been a few people who went outside the usual here and built turbo trucks for towing duty with success but not many examples that I have come across.
If you really look into it, almost every recommendation for towing + boost is supercharger. There have been a few people who went outside the usual here and built turbo trucks for towing duty with success but not many examples that I have come across.
09-12-2018, 09:26 AM
#16
That said I'm still getting a LSA blower ;-) though I'll miss the turbo noises.
09-12-2018, 11:50 AM
#17
So, what you said about RPM dependent isnt 100% true.
Roots blowers make (for example) 10psi off idle and 10psi at redline. Generally speaking, boost generally falls off a little bit up top.
The reason for this is they move 500cfm at 650rpm, and they move 5000cfm at 6500rpm. The engine is only ingesting 50cfm at 650rpm WOT, and 4000cfm at 6500. So that air accumulates in the manifold, aka boost. Disclaimer, those numbers are straight outta my *** without toilet paper. But roots blowers move a TON of air. And the extra air the engine cant consume turns into boost.
There is no blower of any type on the face of this planet that can beat a roots for air delivery at low RPM, aka towing speeds.
Diesels use turbos for a variety of reasons, mainly they move more exhaust per stroke, so they boost up turbos fasters. Dont forget tho, a 2 stroke diesel uses a roots blower to feed itself air, and it considered naturally aspirated. Most 2 stroke diesels redline sub 2k rpm. In ships, most of them redline 500rpm.
Those facts are not out of my butt.
Roots blowers make (for example) 10psi off idle and 10psi at redline. Generally speaking, boost generally falls off a little bit up top.
The reason for this is they move 500cfm at 650rpm, and they move 5000cfm at 6500rpm. The engine is only ingesting 50cfm at 650rpm WOT, and 4000cfm at 6500. So that air accumulates in the manifold, aka boost. Disclaimer, those numbers are straight outta my *** without toilet paper. But roots blowers move a TON of air. And the extra air the engine cant consume turns into boost.
There is no blower of any type on the face of this planet that can beat a roots for air delivery at low RPM, aka towing speeds.
Diesels use turbos for a variety of reasons, mainly they move more exhaust per stroke, so they boost up turbos fasters. Dont forget tho, a 2 stroke diesel uses a roots blower to feed itself air, and it considered naturally aspirated. Most 2 stroke diesels redline sub 2k rpm. In ships, most of them redline 500rpm.
Those facts are not out of my butt.
09-12-2018, 12:10 PM
#18
So, what you said about RPM dependent isnt 100% true.
Roots blowers make (for example) 10psi off idle and 10psi at redline. Generally speaking, boost generally falls off a little bit up top.
The reason for this is they move 500cfm at 650rpm, and they move 5000cfm at 6500rpm. The engine is only ingesting 50cfm at 650rpm WOT, and 4000cfm at 6500. So that air accumulates in the manifold, aka boost. Disclaimer, those numbers are straight outta my *** without toilet paper. But roots blowers move a TON of air. And the extra air the engine cant consume turns into boost.
There is no blower of any type on the face of this planet that can beat a roots for air delivery at low RPM, aka towing speeds.
Diesels use turbos for a variety of reasons, mainly they move more exhaust per stroke, so they boost up turbos fasters. Dont forget tho, a 2 stroke diesel uses a roots blower to feed itself air, and it considered naturally aspirated. Most 2 stroke diesels redline sub 2k rpm. In ships, most of them redline 500rpm.
Those facts are not out of my butt.
Roots blowers make (for example) 10psi off idle and 10psi at redline. Generally speaking, boost generally falls off a little bit up top.
The reason for this is they move 500cfm at 650rpm, and they move 5000cfm at 6500rpm. The engine is only ingesting 50cfm at 650rpm WOT, and 4000cfm at 6500. So that air accumulates in the manifold, aka boost. Disclaimer, those numbers are straight outta my *** without toilet paper. But roots blowers move a TON of air. And the extra air the engine cant consume turns into boost.
There is no blower of any type on the face of this planet that can beat a roots for air delivery at low RPM, aka towing speeds.
Diesels use turbos for a variety of reasons, mainly they move more exhaust per stroke, so they boost up turbos fasters. Dont forget tho, a 2 stroke diesel uses a roots blower to feed itself air, and it considered naturally aspirated. Most 2 stroke diesels redline sub 2k rpm. In ships, most of them redline 500rpm.
Those facts are not out of my butt.
Good info, thanks
09-12-2018, 01:07 PM
#20