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Unread 07-12-2011, 08:25 PM   #1
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Default S10 runs [email protected] mph & gets 27 mpg

A while back on another thread I suggest that I could get very good performance and good gas mileage too with a 5.3 V8 swap in my Jimmy. Here is a guy with a pickup that has the best of both worlds. He would have never gotten this good of gas mileage with the stock 4.3 V6



This guy is a member on a forum I frequent
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Unread 07-12-2011, 09:11 PM   #2
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The 5.3 is a very efficient workhorse, and when paired with the right gearing could pull more than that even for hwy mpg. And we are tripping over iron block 5.3's here in WI where just about every 4x4 GM vehicle made after 2000 has one, so they are cheap and available.

I am still very curious as to what kind of MPG my 240 would pull with an LS7 @ 2300lb wet curb weight. Who says displacement and fuel economy don't go hand in hand?
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Unread 07-13-2011, 10:42 AM   #3
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2300lb ! Ide love to see that!

And this is all totally believable. Its not so much what you drive, but how you drive it.

Bolting a turbo on that 5.3 will nock a sec or 2 off that 1/4 mile time, and add another couple mpg on the highway! The beauty of turbos is the power is there when you want it, otherwise the engine runs lean when putting around on the highway...

And to the video of the carrera, that little carrera was about to smoke the truck! And its only a carrera S, not even the turbo! lol He barely got on it and when he did he pulled away pretty quickly untill he let off.
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Unread 07-13-2011, 06:29 PM   #4
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104 MPG? HOLY HELL!!!


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Unread 07-13-2011, 07:41 PM   #5
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That's his trap speed not his mpg.
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Unread 07-14-2011, 09:21 AM   #6
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I'm not fond of turbos on performance vehicles personally. They give you the choice between a car that sounds like ass(Just listen to Evo Xs and current STIs, the anti-lag system sounds exactly like rods breaking!), Low boost, or half a second between throttle application and more power than a Prius.


Call me impatient but I'm fine with blowers or N/A.


Impressive little S10 though.
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Unread 07-14-2011, 07:48 PM   #7
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Quote:
Originally Posted by Kenny McCormick View Post
I'm not fond of turbos on performance vehicles personally. They give you the choice between a car that sounds like ass(Just listen to Evo Xs and current STIs, the anti-lag system sounds exactly like rods breaking!), Low boost, or half a second between throttle application and more power than a Prius.


Call me impatient but I'm fine with blowers or N/A.


Impressive little S10 though.
LOL WTH are you talking about!? I can agree only with the part about how the car sounds with an antilag/2-step, if you dont like the sound of an evo or sti... fine. But everything else is wrong. It can all be said about blown cars too, and even some n/a setups.

And yes 2 step sounds like something is going terribly wrong, or your pegging a rev limiter, but thats just how it works. Its a great system if you want/need to build boost on the starting line.

I personally choose turbo setups instead of supercharged setups because in a street application it yeilds much better fuel economy because at lower rpm, which is say below 3500rpm, your typically not in any boost daily driving conditions so fuel consumption is much lower, like that of the same motor setup N/A.
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Unread 07-14-2011, 08:57 PM   #8
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There are two sides to every coin. When the turbo isn't generating boost it is creating a large restriction in the intake system, generating large amounts of heat under the hood, and adding 30-150 (IC, piping, turbo, etc.) pounds of extra weight to accelerate and brake. I'm thinking low speed auto-X and driving around town here, where response and low end are the most beneficial.

When a large(ish)turbo does make full boost though, you had better have reinforced seat mounts or you'll be stuffed in the trunk. Great for high speed racing, the drag strip, or just hooning around town like a lunatic.
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Unread 07-14-2011, 10:00 PM   #9
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There are two sides to every coin. When the turbo isn't generating boost it is creating a large restriction in the intake system, generating large amounts of heat under the hood, and adding 30-150 (IC, piping, turbo, etc.) pounds of extra weight to accelerate and brake. I'm thinking low speed auto-X and driving around town here, where response and low end are the most beneficial.

When a large(ish)turbo does make full boost though, you had better have reinforced seat mounts or you'll be stuffed in the trunk. Great for high speed racing, the drag strip, or just hooning around town like a lunatic.
I know plenty of auto X cars that are top class and have turbos. A turbo system is like anything else, it takes skill and knowledge to tune everything right, compressor A/R, exhaust housings, ecu tunes, timing maps... it all has to do with how the turbo will spool and respond.

Yes a turbo system adds some weight, but so does a supercharger. And a supercharger sucks power from the motor directly via the belt drive system. Boost has to come from somewhere, it takes power to make power.
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Unread 07-15-2011, 02:02 AM   #10
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If the supercharger can't make up the paltry 10-15HP it takes to turn then it's too worn out to be used. Most blowers add between 50 and 250HP to an engine, far more than they actually require to turn. So I really don't get why people care about the negligible draw, the net effect is way more power.

As for turbos...skip to 45s, Clarkson quite nicely illustrates why I don't like them on streetcars.



I stand by my opinion. Turbos are great on large trucks, where the lag is moot, and track cars, which will never be caught putzing around off-boost, but keep them off my streetcar please. You have absolutely no power off-boost, which coincidentally is where you'll be on the street.
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1997 Ford Explorer XLT | 4.0L Vulcan V6 | 5-speed automatic | shift-on-the-fly 4WD | 210,000 miles | Running 95% - Needs brakes on all four corners + bald tires
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