All of these issues are valid points. The trucks intended use would be mostly daily driving with the occasional (2-3 times a month) tow. I can't sacrifice mileage for some extra power unless it is from using the power either by towing or sticking the foot in it to much. We are just looking for some extra beans to pull with and make the truck more fun. Even if the truck is not set up with a race program & instead is set up with a tow program, it would still have to be quicker then it was before, I would hope it was at least. Is it worth putting on any kind of forced induction or is it going to be more headace then it is worth? Should we just throw an exhaust and tune on and call it a day? The reason I started this was because my dad doesn't like how slow his new truck is compared to his old 99 2wd ext cab with a 5.3 & 3.73 gearing. We understand there is a weight difference and they are completely different trucks. We just want more power for this new truck without sacraficing mpg. I know many turbo systems will give you usually 2mpg if you drive responsibly, twin screw I'm not sure of.

So is it worth putting a system on or not? Can it be done safely with a safe tune and the right precautions, or even with that, climbing the side of a mountain for 5 min with a 6,000lb boat on the back going to blow up the engine? We are not doing this to run the 1/4mi and do 0-60 burst, even though somehow that might happen when I get in it.

 

The turbo is not going to help your fuel economny. It is going to give you more power.. and power comes out of the gas tank.

 

From what I read on this board and on others, increased mpg is a result of a more efficient engine due to the turbo. This is only true if you drive with care and not race everything in site. The company's making the products are making the same claims. I could be wrong.

 

Well, think about it this way... the only time you use the turbo is WOT or close to it... when you're pushing the vehicle harder than you really need to because you want to go fast. During normal everyday (conservative) driving, your tubro is not used at all. Therefore, it is not an economizer. Turbo system efficiency has little/nothing to do with fuel efficiency in everyday driving. If you want to better your fuel efficiency, 1) no "jackrabbit" aggressive starts at stop signs and red lights 2) stay around the highway speed limit (65-70mph -> air resistance/drag is a b$tch) 3) keep your RPM's down when appropriate and 4) do regular tuneups and maintenance.

Your turbo is an exhaust restriction, and that will hurt your fuel mileage a little... not much, but a little.

If the turbo kit companies are making claims about increased fuel mileage, I would look at exactly what they are claiming very carefully. It is possible I could be wrong (there's always a possibility, as I don't claim to know everything) but I would like to hear one's arguement on why a turbo will increase your gas mileage during reasonable every day driving. Even when towing, I think it's going to be difficult to argue that flying up it with your turbo setup is going to be more efficient than going a little slower with your N/A setup!

 

Guys he is towing....not running a ***** to the wall 30psi setup for endurance racing...lol. Like I said, do the tuning right (ala conservative), protect the important parts and you can tow just fine. Watch the EGT's and if done right it will not perform a melt down as some suggest...lol.

For the others....If you find an incline that lasts for over 20mins that requires full throttle in a big turbocharged 6.0 liter, let me know where this is at in the US. I would like to see if I can see both coasts from up there.......ought to be one hell of a view. If the engine was a 1000+hp monster running 30psi of boost and Alky running on the edge with 1500-1600 EGT, then I would say otherwise....lol. And since you guys keep refering to Diesels and full throttle ***** to the walls applications.....the EGT's on the Diesels are WAY higher on full loads. I have diesel tractor pulling customers . Its nice to have an aluminum skirt, steel crown piston with 1700-1800 Deg EGT's.

 

FastKat, it all depends on the load and turbo. A small unit will make postitive torque adding boost/hp at even the slight touch of a pedal. Drive a 2G DSM, you'll know what I mean . I think alot of you guys are getting a small setup confused with drag setups. A small turbo on a 6.0 liter will spool VERY fast with little load and not require going WOT or close to it. And if tuned right, use the fuel to keep the EGT's down.

Jose

 

No, that's true... I did forget about that... but still, is either setup an economizer? That's my argument here... I don't think it will improve fuel efficiency on his "daily driver/3 times a month towing" application.

What's a 2G DSM? Is it diesel? I'd think such a small turbo on a gas application would be even more inefficient, building higher and more dangerous EGT's earlier in the RPM band.

 

2G is a Talon/Eclipse. As for fuel economy, no.....boost equals air, which requires fuel. So if they claim boost gives better gas mileage, then they are just sellers not testers. Adding air to and engine is like running a bigger motor...lol. 100lbs of air = 100lbs of air vs time, whether its done in a 454 N/A or 1.5 liter honda at 40psi of boost.

 

Sweet... for a minute there I thought you were going to turn my whole turbo world upside-down!!

Good thing to point out, too... turbos pump air into an engine, and more air = more fuel.

 

I think most of the OEM's use the grade coming out of Death Valley. A friend of mine does testing for Ford. He ran his diesel pickup from the bottom to the top. When he got to the top, he stopped and left the thing idling. After about five minutes the cowl screen between the engine and the hood melted into a puddle. A little bit of heat in there I guess...

-Geoff

 

That Toyota engine in the cell phone pics appears to be the 4.5L straight six that was in the Land Cruiser before the 32v 4.7L V8 came along. The turbo setup would have to be a custom job since those things weren't turboed from the factory.

 

Jeep, very good eye... It is indeed the 1FZ motor. Its much stronger then a 2JZ, though . It came in the FJ80 platform. BTW, the particular vehicle is making in excess of 700 AWHP.

Jose

 

First off the job of trying to find a grade that could create a 100% throttle senario for 20 or more minutes is quite easy, I can go outside, get on the freeway and go about 10 miles east on highway 10 AND START CLIMBING. As for the EGT's if we are talking equal torque production engines GAS/Diesel they are generally lesser on the diesels (not more than about 1400* absolute max on stock engines for any length of time, where it is easy to achieve this high with a gas engine with moderate boost/power on a traditional turbo style) up until you get to absolute meltdown on a gas engine where the diesel will continue to rise to the point you stated. Look, the point here is this guy wants some power increase and he wants to do it with as little problems/effort as possible, its not a race truck, or a tractor puller, its a daily driver and I have been specializing in street driven pump gas engines for almost 10 years and NEVER have had a problem OR a comeback. This truck will perform best with the least problems with something like the STS system due to the much lower underhood temps and cooler overall Inlet temps without a intercooler bottom line.

-Bryan

 

I liked the boat analogy jose. Putting a boat through the water with a twin 502s that are at constant load all the time goes to show what properly designed systems are cabable of. Air planes are the same way as far as engine load, as there is no other phsycics forces @ work other than a prop to get those things through their respective medium. Though I'd have to agree with Bryan that the STS system would probably be a slightly better bet IF one was that concerned about the under hood temps and EGTs.

 

specs on this thing

 

Hum, I think I read about that in Hot rod as someone was doing a little experiment with that motor for PGD. Dunno how it turned out yet and has anyone heard anything about Drag Week yet?

 

Is that the motor that's supposedly going into the new Euro Focus sport, I6, Turbo, AWD, 6spd? I hope that that thing does hit our shores cause it'll be killer for a daily driver

 

If your concerned about underhood temps then yeah. But I'm not if the turbo is blanketed. If you guys haven't tried the latest in blankets, you need to do so. Also as for an STS system and no intercooler and long steep grades....thats worse then any front mount system with high underhood temps. As for experience....we do ALOT more then daily drivers, Race trucks, tractor pullers, power boats, motorcycles,...etc...etc. As for diesel EGT's read my other posts...I already addressed heavy loads on a regular diesel.

 

Aaron, the I6 Trailblazer engine went a 9.24. Its running a custom sheetmetal intake, Large frame 80mm, BS3 tuned by John Meaney, engine was built by Self racing and Smithracecraft did the chassis I believe.

 

Kick ***. BS3 and Meaney are the ****, and that sheetmetal intake looks . Thanks for the info Jose, and I had remembered that someone was working with a NA 6 stacked 4.2, and that was supposedly the precurser to this one, and if I am not mistaken last year's winner of HotRod's PGD.