kmfvfr
Las Vegas
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Joined: 03/06/2007
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Ordered mine 30 minutes ago...installed after it arrives in 7 days!!
NOT!!! Pretty impressive for sure...don't think it will help out with gas mileage knowing it is under the hood. I have yet to floor the truck as it is, but I doubt I could resist with that.
2008 Pacific Coachworks Tango 276 RBS
2007 Toyota Tundra TRD 5.7L 
Prodigy Brake Controller
Yamaha EF2400iS Generator
Yamaha FJR1300
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smkettner
Southern California
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Joined: 03/21/2005
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billtex wrote:$6000...OUCH! Plus dealer install labor. I still want one.
I wonder if the cooling system could handle full throttle for 15 minutes to get up a long grade on a hot day. But I suppose you would have to overload the Tundra GCWR to max out that motor.
2001 F150 SuperCrew 5.4 Lariat Offroad 4x4 Tow Package 4.10 Truetrac
2006 Keystone Springdale 249FWBHLS
12K SuperGlide, KGE3000Ti 2.3kw rated 2.6kw max
Frank's voltage booster, Prosine 1800 powered by 4 GC2 batteries
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killerbee
PHOENIX USA, Never hot
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Joined: 03/03/2006
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goodcruisin wrote:killerbee wrote:a supercharger is a parasitic accessory. How can it possibly increase mileage? Power, yes...mileage? Increasing VE is of no value if the vehicle is lean. At a 20 HP output hiway empty cruise, a supercharger is like an AC compressor you can't shut off.
I'd think the computer would quickly adjust to keep the engine at the proper air/fuel ratio.
Quoted from Superchargersonline.com "Will a supercharger affect my fuel economy?
Answer: Fuel economy depends entirely on your driving habits and in some cases you may experience an increase in gas mileage. Under normal freeway driving, for example, the supercharger is not under boost but is increasing the efficiency of the engine by forcing air through restrictions like the air filter. But let's face it, you are not interested in a supercharger to enjoy "normal driving conditions." When you are demanding additional performance from your vehicle it will require additional fuel. If you are a "lead foot" your fuel economy will decline because your car is working harder. If you are simply using the supercharger for occasional acceleration and passing performance, then your fuel economy should remain about the same. Remember that the only way to make more horsepower is to burn more fuel per unit of time, and that's exactly what a supercharger is designed to do."
This quote made my case. It is marketing doublespeak. "about the same..."?
It may not lower economy enough for you to be unhappy, but it DOES lower economy. Too many "something for nothing" wish lists out there.
Duramax Cooling System Evaluation
Intro to TURBODIESEL INDUCTION OVERHEATING
THERMAL FEEDBACK and INDUCTION OVERHEATING
GM Overheating
Engine Oil Cooling
FORUM for Duramax Performance
Tune Your Own GM Vehicle
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killerbee
PHOENIX USA, Never hot
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smkettner wrote:I wonder if the cooling system could handle full throttle for 15 minutes to get up a long grade on a hot day. But I suppose you would have to overload the Tundra GCWR to max out that motor.
assuming that there is no CAC, then it should have no problem. The cooling system will likely work better. May want to consider Water injection however, this will add significantly to the power output by reducing charge temp and knock timing retard.
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flrvman
Southeast
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Joined: 01/29/2006
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What good is it for towing if the chassis can't handle the weight of a nice 5'vr? Why dont they just build a bigger truck if they want to play in the game?
2003 Revolution 40C
Taupe/350 Cummins/
toad-2005 Chevy Malibu - Gold
Florida/full-timers
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8.1 Van
Millstone NJ
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Joined: 03/20/2008
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I think it's time for Supercharged to trade his supercharged Chevy pickup for this. Or maybe get a 2009 Chevy 4500 pickup with 8.1 and put a supercharger on it.
FKA PSDExcursion
2002 Chevy Express LS 3500 8.1 155" WB passenger van 3.73 posi (GT4/G80)
41 Ft 2003 Thor Citation 41-ZBSR TT w/ Hensley Arrow
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BenK
SF BayArea
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Joined: 04/18/2002
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There is no free lunch in these types of things...
Stuffing in the volume that a much larger displacement engine into a
smaller displacement engine is what this does. There are 'some'
efficiencies but not what most think.
'Roots-type compressor' is 'on' all the time, so if the dampener/crank
is spinning and the serpentine belt hooked up, the compressor is 'on'
and compressing air into the intake manifold. This type is positive
displacement, so if it stops spinning, it will block the intake and
'no' air allowed in. That is how this type works.
381HP to 504HP and 401 ft/lbs torque to 550 ft/lbs is impressive indeed,
but what about the rest of the drive train? Do you suppose Toyota had
that much safety margin before and still has 'enough' safety margin left?
I'd like to see the fine print, but think they really don't need that
as the GVWR and GCWR are most likely unchanged. If changed, bet lowered
by that fine print.
Boy racer stuff and I'd bet a Costco Dog lunch not going to hold up
towing at the limits. Fun stuff anyway, but for me, not a good thing
for towing/hauling close or at the limits.
-Ben Picture of my rig
1996 GMC SLT Suburban 3/4 ton K3500/7.4L/4:1/+150Kmiles orig owner...
1980 Chevy Silverado C10/long bed/"BUILT" 5.7L/3:73/1 ton helper springs/+329Kmiles, bought it from dad...
1998 Mazda B2500 (1/2 ton) pickup, 2nd owner...
Praise Dyno Brake equiped and all have "nose bleed" braking!
Previous trucks/offroaders: 40's Jeep restored in mid 60's / 69 DuneBuggy (approx +1K lb: VW pan/200hpCorvair: eng, cam, dual carb'w velocity stacks'n 18" runners, 4spd transaxle) made myself from ground up / 1970 Toyota FJ40 / 1973 K5 Blazer (2dr Tahoe, 1 ton axles front/rear, +255K miles when sold it)...
Sold the boat (looking for another): Trophy with twin 150's...
51 cylinders in household, what's yours?...
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BillyW
North ID
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Joined: 10/08/2003
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I added a positive displacement supercharger and cams to my 4.6. I believe the cams have hurt my mileage, not the supercharger (as long as I stay off the right pedal). My supercharger (as most do) has a bypass valve allowing the pressure to bleed off when not on the throttle, and I know for a fact it will still allow free flowing air into the engine without the belt attached.
I am finding that my mileage (especially towing) is improving as I learn the system. There is parasitic loss, but I think it's off set by the mere fact that you don't down shift nearly as often to pull those hills or even pass slower traffic. And MAN, can you pass that traffic!
'97 F150 4X4
'04 Pioneer 18T6
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killerbee
PHOENIX USA, Never hot
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Joined: 03/03/2006
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Also, food for thought...by upping the power this much for towing, you will likely uncover the next weakest link. Prepare to spend more $$. Maybe not right away, but it will come.
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pronstar
The LBC
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Joined: 11/20/2007
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Modern blowers have bypass valves that significantly reduce parasitic losses when the engine is working under vacuum....which is most of the time when running empty.
But when you're towing, you'll be into the boost most of the time. Boost = more air = more fuel is needed.
I got 5mpg when towing with my blown Expedition. And about 14mpg combined while running empty.
I would expect this blown 5.7 to return better MPG than what I got, while towing...but not dramatically better.
2007 Dodge Ram 2500 CTD 4x4/QC/LB
2008 Stellar 23' Toy Hauler
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