mabe forged crank.
low static compression (mabe 6:1 for 87 octane)
larger injectors based on the hp
possibly remap the computer for proper fuel inrichment
how will you bleed off boost?
are you going to rework the heads?
Best bang for the buck this is! Turbo Diesels are the most effiecint theing we have got going right now with the limit to boose bieng breaking stuff adn diesel is almost raw kerosene form the oil field but because it has more btus it now cost more than gasoline so they have really grabbed a hold of us and it sucks becuse if I did not run old relaible 6 I would want to run a heavy 1200 lb diesel and get 17 mpg.
I would read books on it first-books on engine management systems too because it won't be easy. It is a great idea because I like turbos however suprechargers are nice too. If you can control the pulse width to shorten the pulse width while the supercharger is not blowing and save some gas because you do not need the torque cruising and it is alot more fun when you do not always have it and can double your torque on a buton!
You could run stock compresson or evne higher with a big cam and have the midrange 5000+ rpm and with the turbo can boost the low end and have a huge flat torque curve! A guy did this on his 1970s ford F-250 390 he built a TPI for it and turboed it and he loved it and got decent gas mileage too!
[QUOTE=Huntersbo]I would read books on it first-books on engine management systems too because it won't be easy. It is a great idea because I like turbos however suprechargers are nice too. If you can control the pulse width to shorten the pulse width while the supercharger is not blowing and save some gas because you do not need the torque cruising and it is alot more fun when you do not always have it and can double your torque on a buton![/QUOT
torque on a button? what?
[SIZE="2"]'87 YJ, 4.2L, MC2100, HEI, RE 4.5", 2" body lift, ford 8.8 locked, 36" Swampers, homemade discos, Superwinch x9[/SIZE]
A turbo would be extremely easy in a jeep.
Get a small turbo like a Mitsubishi 14b (I have one Ill sell if ya need one )
Flanges can be bought from here www.jgstools.com
Run an adjustable fmu for the fuel
Get a water injection system so you dont have to run intercooler piping
Atleast get a narrowband Air/Fuel gauge but a wideband would work better
Running about 5-6 psi should be safe for everyday on stock internals. everything can be had for under $1000.
I would like it boosting between 10 and 14 pound. Could you imagine holw cool a jeep would sound with a bov
if your deciding to boost that much, you better be counting on replacing ALL internal engine components and doing some serious beefing up of the ignition and fuel systems!!!!!
it's not just a bolt on system, you need to modify other things to make RELIABLE horsepower. if you boost that much on a stock motor, you blowing it up.....hands down.
the stock motor can handle maybe 6lbs MAX, before you start serious overheating and damage to internals. a turbo is not an easy thing, or cheap horsepower....
it's a big thing to plan out, and know what your doing. if you don't know about turbo's, or engine performance. have someone else who knows how to, do it.
i've had a subaru wrx turbo for about 4 years now, and i STILL wouldn't know how do mess w/ fuel trim, spark curves, boost, and timing all together to produce good reliable horsepower. and i'm a mechanic, and know a good deal about engine performance and turbo operation.
do your research, it's the BIGGEST money saver for you.
95 yj sahara green w/ spice hard and soft top, bikini top,full steel doors, and 2 piece bestop soft doors,tnt customs front tube fenders w/ 6" flare,warn gas tank skid, skidrow oil pan skid,4.0HO,rear 31 spline 8.8 w/ disc brakes,4.10's and lsd,front HP d30 w/ 4.10's and aussie front locker,ax15,np231j w/ jb conversions ss sye, tom woods custom cv d/s,RE 4.5xd,35" toyo open country m/t's, 1" daystar body lift, warn 9.5ti
Don't invest that much money into a 2.5 4banger. You would be better getting a 170hp ish toyota or nissan motor. Which would already have decent power. Good luck getting it to mate with the ax5 or 15 transmission though.
why not in the 2.5 i had one and drove the living **** out of it and it never let me down once and a turbo would be bad *** on one
93 yj lifted locked and ready to rock
6.5"soa 35's lockers beadlocks,8.8
and some other junk here and there www.krawltex.com
if your in austin look them up best guys to deal with hands down
you guys are throwing minsinformation out like crazy. did i really read 6:1 static cr???!!! lol and 6 psi max on the stock cast iron block? guys, seriously, don't spread misinformation. it's totally misleading to the people reading this thread who have no idea about this tuff and are trying to learn.
do some research... i wouldn't do it in a hundred years... it will never be as reliable as a stock engine, the power band will not be linear which will SUCK off road, and you will end up with a hack job manifold, piping, etc unless you happen to have the big bucks or skills to actually fabricate quality parts. your jeep already has enough crap to break, why would you want to add more to that list??
if you want more power than swap in a 4.0 or a small block. you could do a small block swap for less than $500 if you looked hard enough for a deal on a used motor and you have the tools and fabrication skills necessary for little stuff like mounts and such.
-Erik <--- laughing about how much everyone here "knows" about turbo's
'89 Wrangler, 4.0/AW4, 106" Wheelbase, SOA, custom XJ packs, 2" Body. Front High Pinion Dana 44 w/yukon super-joints, chromo inners and outers, and a Lincoln Locker. Rear Dana 60 w/Yukon 1.5" 35 Spline chomo shafts and detroit locker. 5.38 Yukon Gears. Hydro-Assist, 39.5x18" Boggers on 15x12 RockKrawler's w/ 2.75" of backspacing. Comp cut, tube fenders, custom bumpers and rock sliders, fuel cell, CB, Stewart Warner Gauges, SmittyBilt XRC8 Winch, 140 Amp CS-144 Alternator, Electric Fan, and a cooler of beer. 3897 lbs
you cold never swap a small block for 500 bucks...thats just not possible. yes you could get a motor and trans for under 500 bucks if your lucky. but dont forget that for it to drive you'll need new driveshafts, cooling, at least a rear axle and have to do something with the transfer case whether get an adapter or get a different one. and those little things like mounts and wire add up alot more than you would think.
a turbo on the 4 cyl is feasible if you have some mechanical skill. i'm no expert on turbos but the 4 cyl has a 9.1:1 compression ratio. optimal compression for a turbo is 8.5:1 so its not that far off. i would say 7psi on stock internals isn't gonna hurt anything. in the late 80's dodge made a turbo caravan with the same 2.5 motor that the jeeps have. if you could find one (hard to find i'm sure) you could take the turbo, exhaust manifold, you could run larger injectors or a 5th injector for more fuel for the extra air being pushed in the motor. and with all the space that the 4cyl leaves in the engine compartment an intercooler would be very easy to pipe. go to an exhaust shop and get some custom pipes bent so you can mate the stock exhaust to the turbo. its not unreasonable to consider for more power in the 4 banger. a full drivetrain swap is more intimidating than tryin to work a turbo into the motor and all i would want it for is a lil extra omfff on the highway. the 4 has plenty of power offroad