In my opinion if you have never held a functioning turbo in your hands you really have no valid input on the matter.

Truth: you don't need to run the engine at high rpm to make boost provided the system is set up correctly.

Truth: turbo systems are WIDELY used on diesel trucks due to their ability to greatly increase torque at low to mid RPM.

There are literally hundreds of turbos out there- each housing Precision makes can house a plethora of exhaust and compression wheels, and each turbo is assembled specifically for the customer's application. You can have 2 turbos that look identical to the untrained eye for 2 completely different applications.

They know how to make the boost happen where and when you need it- it's all mathematical.

 

richxj is correct. i have a 800 hp diesel truck with a custom twin turbo set up that i built, i have a T/A with a rear mount sts turbo set up. i have built and installed no less than 10 kits of other vehicals. rich is correct a smaller turbo will almost elimiate turbo lag give you power jst off idle which is where u want it off road. wheather you climb, mud, or just trail ride it would be good. and you were also right by saying boost is built by load not engine rpm. the only problem i see with the kit pictured is that it was not intercooled.... so much potenial engery is wasted by shoving hot air into an engine. a small intercooler would prolly kick hp up 30 or 40 at the wheels. the perks of a turbo vs a supercharger is that a supercharger is always there. turbo ur you dont smash the go pedal it wont build as much boost. so you can still keep good mileage and a dependalble rig. fo something you drive on the street a turbo is an unbeatable way to make good hp numbers.

just FYI a waste gate does not change the power band of when your turbo kicks in is simiply mechanically limits the amout of overalll boost being made. I.E. if you are cable of makeing 20psi of boost and you can set your waste gate at 7 and after your turbo system produces more than 7psi it will start bleeding boost to atmosphere and out of your turbo system.

And if your buddys slowstang is only making 500whp with a 70mm turbo. it is set up horrably wrong either the motor isnt moving enuf exhaust cfm to spool that big of a turbo or you ahve other problems. my T/a has a 38mm and it is making 525 at the wheels on a stock bottom end with liek 6 psi. i built a pro touring t/a for a customer that had a 90mm rear mount turbo with a full roller 408 small bock and it made a lil over 1000whp. depending on teh set up. if he steps his turbo size down he will prolly see larger hp numbers.
hope this helps if you ahve any questions on turbo set ups feel free to pm me
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the truth shall set you free. here is something cool- cnc machined compressor covers straight from the parts cleaner. couple few more laying around in the background.




camera phone pic from my old job.

 

that is awsome! i would never want to leave taht place! lol. and yeah turbo have so many diff applications and potetental!

 

Diesel motors are exempt for this topic. the ONLY supercharger i would consider would be a positive displacement ROOTS style. A centrifical blower like the VORTECH i have on my mustang doesnt pick up till 3k+ And actually a roots blower would be the Best type of Forced induction for a trail rig due to being able to make max boost as soon as throttle is applied and has the ability to carry it to the top of the power band and still be efficient unlike a small turbo.........and i hate to say it but that 38MM is a bit small for your T/A if it were dual it would be a different story. infact i would like to see a dyno sheet for that car........i dont dought the 408 with a 90MM but you know as well as me your 350 is overpowering that single 38MM.

 

Not in the least....I am a firm believer that the ONLY replacement for displacement is forced induction. I currently own 1 500HP turbo mustang and 1 400HP supercharged mustang.

 

hmm... odd a jeep with a turbo rock climbing

 

that is at the crank but the listed hp and tq was what was dynoed.

 

please read the posts before you put in your .02 i never said it hasnt been done...........just isnt pratical/common...

 

lol i did read it, and IMO the reason you dont see it is beacuase the sepration of offraoding/trucks community from the tunner comunity, which is where the use of turbos is heavly explored. THere has never been a big disire for turbos for our industire so u wont see ppl doing research and makeing kits. Hobbiest feed almost every industrie, so if there is no ppl tinkering or a high demand for a kit, none will be made. how prefulant have turbo diesals over the years? To the best of my knowleage it is some what of a new practice repectivly to the age of the turbo. But as a practical since? You can get alot of power out of a tubo set up for less wight then a swap. And you can tune a system for great power gains in lower range seeing we dotn see high rpms driving jeeps. Would i do it? maybe, there are alot of thigns to worry about with turbos. I have hade my fear share of turbo head achs. A stroker IMO woudl be a better option. But a turbo set up will have benifits. Fuel economy vs swap/stroker, more uniqe, a good set up will open up doors for more options for us for our jeeps.

If you do decide to do a turbo set up do alot of reserch and talk to alot of ppl. There was a book on turbos i read a few years back that is liek the bible for turbos, but i cant rember the name. Try and find it and give it a read. But becuase turbos are a taboo idea to jeeps do a lot of reserch, and dont buy a cheap turbo. If you want to go the cheap route get a trubo from the JY

 

A smaller turbo is able to spool and make boost at a much lower RPM range than a huge turbo. A lot of rock crawlers out there are 4cylinder turbos. It gives the guys the horsepower they need with out the weight of a V8. Bigcountry and 98jeepjeep you guys are right about most people stroking or going to a v8 but in most peoples eyes that is the more cost effective upgrade. You two dont know a damn thing about turbos though!! For a rockcrawler i think you couldnt go wrong with a turbo.

 

i wouldn't turbo a 6cyc. would be better to just stroke. But when i still had my 4cyc yj i was planing to ether turbo or put a 4bt in

 

everyone is different I personally wouldnt put on a small turbo for a rock crawler if i was doing it would be a stroker or a roots blower that could make power low,run higher in the RPMS and still be efficient unlike a tiny turbo. the only benefit the turbo would have over the roots is COST!! spare me the lecture on turbos.

 

but besides the issue of cost how many root style sc are out there for jeep, or even any sc for that matter.

 

actaully its just about right... the heads have a mild port and valve job they flow BOUT 310cfm i buiilt this car to be a very dependable daily driver. and that is excatly what it is. any body can just throw a turbo on a car and brag about how big it is.... bigger is not always better. everyone is entitled to their own opinion but that dont make it right.... i dont know everything. but i know a thing or 2 about turbo setups.