The reason they use a turbo with a diesel is to increase acceleration. It has nothing to do with increasing towing capacity. A diesel engine posses enough torque without a turbo. With out it, it takes diesels forever to accelerate. 1998 Volkswagen Jetta Turbo Diesel!

That one I know I had a 1981 VW Rabbit Diesel...WITHOUT a turbo....SSLLOOWW! But 56 MPG!

Sorry to bust all of the diesel bubbles...

1) Turbo's are not only on Diesels to hel with acceleration. They are they to provide power throughout the RPM range. Take a Detroit Diesel 6V-92 TA (Turbocharged/Aftercooled) it can be rated up to 400HP. The same engine N/A (with a blower) will rate up to 250HP. Both power ratings are at 2100 rpm/max. Yes the turbo engine will accelerate faster, but it will also have more power under a load.

2) The Detroit Diesels have a blower not a supercharger. A blower moves mass quantities of air without a pressure increase, a supercharger compresses the air much like a turbo. These engines that use a blower are two-stroke, and need the blower to operate. And when are only equipped with a blower are termed "Naturally aspirated". The maximum pressure attained by a blower in one of these engines is about 1.5psi.

It's too hard to manage a twin turbo set up. What engine management computer are you going to use? What are you going to do about the compression? What about the other components like the fuel pump, injectors, ignition system, exhaust. There are too many components that need to be replaced or upgraded to control such a set up.

How do you plan on offroading in a truck with turbo lag in the lower rpm? Crawling requires low end torque and smoothness. Imagine trying to crawl up a wall when the boost kicks in. The reason most trucks use superchargers is because it's power curve is usually linear. Not a good idea, too much money and you'll always have problems. Why not just replace it with the VQ and have 240 ponies? It would be a lot easier, less expensive, and more reliable than TTing your X.

The heat thing is no joke, my Supra's hood is beginning to discolor from the T04 that I put in it.

well i do appreciate all of your imputs, the only reason i am considering this is because i work around all types of mechanics IN nissan parts and i can get basically any part at a good price, and i iwll be honest, i just like to drive fast, and i know that the xterra is top heavy and i don't like taking it over 100.

I would go supercharger except for the fact that there are no aftermarket ones and putting a stock supercharger on a un-supercharged xterra would be a bitch, we considered that, and i would add new pistons, cams, intercooler and heat shields to keep it under reasonable usage, and wasn't there a frontier on here that someone talked about that had turbos put on it somewhere in florida? thanks guys, keep ideas rolling =D

Aftermarket Superchargers

If you are waiting for a bolt on kit it's not going to happen.

heh, i wasn't waiting for a bolt on, but i tried searching it must have came out pretty recently, thanks though

eh dont really find that too useful, i mean they have them for a 350z..

I think I'll just swap out to the engine the 350z uses, can't be all that hard, can it?

Oskana, if you are really interested why don't you read up on the subject?

http://www.amazon.com/exec/obidos/ASIN/0837601606/qid%3D1060910854/sr%3D11-1/ref%3Dsr%5F11%5F1/104-2228599-0998300

Many of the books under the "What other bought" section are also very good, but Corkey is widely considered the godfather of turbo's. He's also a hell of a nice guy

But there is an aftermarket bolt-on kit:

http://www.tonemonday.com

thanks for the imput, helps allot

Brad , it's interesting that that place you listed is in Texas yet on the site it says "You Will Be Notified Of Freight Charges From Zip 92821." That is in Brea , Ca. I wonder if it's a Brea company that's doing the work and the kit and these guys are drop shipping them.

Yes. Tonemonday is a reseller. I believe Alpine Developments is actually a South African company with a distributor in California.

Keep the supercharger, add the turbos. More power, no lag.

Huh? Who in their right mind would add turbos on top of a supercharger?

Actually a few people.....

Supercharged and Turbocharged Engine

HKS put out a kit for the 86-89 MR2's also. I suppose if you have money to burn it's not that bad of an idea.

Seems pretty stupid to me for an Xterra though. :rolleyes:

Well first think about what I wrote. Then you will discover that the application is a respectable solution to the problem at hand. To overcome the lag properties of turbos add a supercharger. You can even shut off the charger valve when the turbo kicks in. Or f*ck keep it flowing.

LOOK AT THIS ARTICLE:

http://www.europeancarweb.com/features/0308ec_bmwbattle/

THEN LOOK AT THIS ARTICLE:

http://www.europeancarweb.com/features/0308ec_grandprixvolvo/

And this is what a VOLVO beat out:

Eight Great Contenders for Car of the Year

(Volvo S60R)
Mercedes-Benz E500
Porsche Boxster S
BMW Z4 Roadster
Saab 9-3
Jaguar XJR
New Beetle Convertible
Audi RS6

Cool. Too bad it's still a Volvo.

HKS made a turbo charger option on the supercharged MR2 AW11 called the twin charger system. Produced in excess of 300hp in a car that weighed in at 2200lbs. Now that is power.

Is it just me, or is it completely odd that a Bettle is in that list?