OK, because I feel it necessary that the stock V6 2.5L 24-valve engine deserves some boost, ive decided that i am going to save up for a custom stage 1 turbo kit. The turbo will be exporting around 5 - 7 psi boost, which should be more than enough to get the output power to 200HP, as I have already put in a cold air intake to the wheelwell, and am ordering a new muffler and free flow cat converter for it.

However, the hardest part to come by is the flippin' turbo manifold, and probably downpipe. Has anyone seen a good turbo manifold and downpipe around the web for a Dodge Avenger 2.5L V6 (1997 to be even more specific)?

If so, I will definately collect the items, take pictures of my progress, and make a good how-to for all of those who own a V6 avenger.

Another thought, because this is going to be a stage 1 kit, I shouldn't need an intercooler, and if I do, it would be a rather small one. Blowoff valve would be nice, to keep the backforce off the turbine wheel, and a good tranny oil cooler, since all the V6's have autos. Not to mention, keeping the turbo at around 6 psi would be good on the engine, AND the tranny, as its an auto. But boosting a V6 2.5L to around 220HP would give the HP that the car really deserved, instead of a wimpy 163HP...

boost controller, probably a manual, would keep the boost down, but if the user wishes higher boost after adding a few other parts, could allow for future upgrading. turbo would be internally wastegated, and small, to keep turbo lag to a minimum, new ECU would be needed, since it wouldnt calculate the new boost right, and maybe larger fuel injectors if needed.

so if anyone knows where i could get a turbo exhaust manifold and downpipe, i would greatly appreciate it!

The 2.5l is a Mitsubishi engine and has the same block and heads as the Mitsu 3.0l engines of the same year. There is a website (with associated shop) that specializes in removing the 2.5l and replacing it with a 3.0l in the Avengers and Sebrings. It is far less complicated than turboing and retains all of the factory computer and diagnostics. The 3.0l puts out about 210hp. They have done some 3.5l upgrades also.
If you still want to turbo your 2.5l, I would assume that the Mitsu 3.0l turbo setup would work for it. You probably need to buy a whole donor car from the junkyard (wrecked, but running) and move the parts over. You will need a piggyback controller to go with that. The piggyback controller allows the engine controller to run the engine as it normally would. The piggyback controller "hides" the turbo from the engine controller and then adds fuel and takes away spark timing to compensate for the Turbo.

someone correct me if im wrong but i believe the tranmission is rated at 250hp so additional transmission cooling should not be necessary

someone correct me if im wrong but i believe the tranmission is rated at 250hp so additional transmission cooling should not be necessary

my best interest would be that on rule-of-thumb, running any engine at boost that has an auto tranny, should have some sort of tranny cooler. this would merely be to play it safe, especially if one has a heavy foot. that and an increase in frequency for tranny flushes would be good as well, again, just to play it safe. i dont want a dead tranny any time soon, that would cost me big $$$.

it looks as if im going to have to find turbo manifolds and downpipes for the v6 3.0L, if anyone has these and wants to make an offer, im all ears.

ive got a 3000gt motor that im rebuilding but its over at a friends house right now but in the next day or 2 i can grab the manifold to see if will fit on the 2.5

if it does ill let ya know so that could open your options a bit more

ive got a 3000gt motor that im rebuilding but its over at a friends house right now but in the next day or 2 i can grab the manifold to see if will fit on the 2.5

if it does ill let ya know so that could open your options a bit more

yeah let me know what you find out. both my front tires gave out on me today, having the car for only about 4 days now! there goes half my paycheck.

anyway, just let me know, since that will really help me out.
thanks!

just gave out huh? so what did you hit? lol

just gave out huh? so what did you hit? lol
nothing! thats the thing! ive heard avengers are really bad on tires, they really tear the shit out of them, fast too. i just wish dodge gave the avenger a much more powerful engine, although the v6 is nice, its a wimpy v6, especially for a heavy car as the avenger. <sniff> i had the choice of either getting an '89 Nissan 300ZX z31 V6 3.0L 5-speed, or the 97 Dodge Avenger ES V6 2.5L auto... ive found that there are nearly not enough aftermarket mods for the v6 avenger, and i really would've loved to own a Z car, those things handle like no other.

my mom is a deusche though, wouldnt let me get the Z at the time, now im arguing about it to the point where we might do a trade-in.

twiceasfastasyou

i'm looking to turbo my v6 2.5l 24 valve avenger as well its an auto matic and its a 1995 and i need some ideas on what i would need to put a turbo in ....pleazze help!

helllp^^^^^^^^^

i'm looking to turbo my v6 2.5l 24 valve avenger as well its an auto matic and its a 1995 and i need some ideas on what i would need to put a turbo in ....pleazze help!

ok before I go into any details, do you even know how a turbocharger setup works, and how difficult it is to do on a V6 6G73, let alone having such a small aftermarket? If you don't, I can explain that, if you do, great! Because I'll have to start somewhere, and I want to know where I should start.

ok before I go into any details, do you even know how a turbocharger setup works, and how difficult it is to do on a V6 6G73, let alone having such a small aftermarket? If you don't, I can explain that, if you do, great! Because I'll have to start somewhere, and I want to know where I should start.

not to mention, this topic has been covered before. but here are the basics:

a/f ration alteration (re-mapped ECU or piggyback ECU)
larger injectors
possibly more powerful fuel pump
new injector lines (if applicable)
turbo (probably a simple T04E, T3/T4, or TD04-9b, depends on manifold)
turbo manifold (im in process of designing/creating one I need a TIG welder!)
02 bung sensor holes in right locations
gaskets
custom dump/downpipe
custom chargepipe w/ possible BOV emplacement
custom wastegate location (if applicable)
tranny oil cooler
turbo oil lines
intercooler/piping (if applicable)
high stall converter (if you want a long-lasting transmission!)
boost guage
cone/foam filter
fuel pressure regulator
turbo timer
exhaust piping/U-bent pipes (if your doing custom-work, best route)
TIG welder (again, if custom-work)

the list can go on if you want a quality turbo setup. i hope to God that your going to read this and realize that the 6G73 isn't much worth in turbocharging, unless you really have money to blow, and you have time on your hands. Once you get all this setup, your going to probably run at 12psi max before intercooling is needed, and internals start to wear/break down. Push any farther without proper internal work and your engine will die a horrible death. It's usually the piston rings that go first in the occasions that I've seen. Then its connecting rods, hehehe...

if you want an engine thats worth putting money into, go with the better 6G72 found in 3000GT/Stealth cars, or swap in a nice VG30ET/DET, if you can. Better yet, if you can fit a classic Z engine in there, better go with an RB25DET, re-built before swap, with custom drivetrain, differentials, etc., then you'll have yourself a sleeper 'venger.

Good luck.

i know what i'm doing but didn't know where to start.. but thnx for the help... i'll get back to you once i see how it will work out... i have most of the stuff so ya shouldn't take much longer then a week... lata

i know what i'm doing but didn't know where to start.. but thnx for the help... i'll get back to you once i see how it will work out... i have most of the stuff so ya shouldn't take much longer then a week... lata

let me know what your progress is, i know that the 6G73 engine doesnt put out much even turbo'd to 5psi. Sure, youll be running around 230HP to the crank, but translated by drivetrain/differentials, the power to wheels will be more around 200... and FWD cars dont put out much power until you get into the 400+ scene. so i'd like to see how you turbocharged your avenger, and if your really going to go through with it, because i know so many people that even own the 420A, which is much easier to deal with, and still have been claiming for years that they are in the process of turbocharging their engine. for now im just sticking to N/A upgrades until the engine has been built enough to turbo.

Mods/Replacements so far:
custom cold air intake
custom cherry bomb turbo II exhaust
breather filter
BOSCH spark plugs

Mods in the next month:
free-flow cat converter
piggyback ECU
predator downpipe
remove resonator(s)
spark plug wires

Plans:
-take complete dimensions of engine bay, and engine
-diagram out using 3D layout software (Maya 8 or HAMMER editor)
-investigate drivetrain architecture and various differentials
-research possible engine swaps

ive already seen others swap out for the 6G72 and the 420A, but i became interested in swapping out for a more potentialized engine. i've always have a fascination of Nissan sportscar engines, therefore I may look into emplacing an RB or VG type engine into the bay of the 97 avenger!

hey guys. i just signed up for this forum thing so im still learning the thricks of the trade but i have a quick question.

Does anyone know where i can find the 6cyl engine swap for a 99 avenger?

hey guys. i just signed up for this forum thing so im still learning the thricks of the trade but i have a quick question.

Does anyone know where i can find the 6cyl engine swap for a 99 avenger?

well, im just going to ignore that this post was brought up from so long ago, because some people here seem to get very upset when a "dead" post is brought up from the grave, if you will....

but for the time that i owned the Avenger ES, the work done to it proved to create small gains, and now I can tell you it wasn't worth the money... for the 2.5L V6. I have friends who own the Eclipse GT that has the 3.0L 6G72, and they say my experience with the 2.5L similarly reflects their own, which is as follows:

i had put in the following in summary:

- Custom exhaust w/ Borla turbo II muffler & no cat (test pipe)
- Piggyback ECU w/ mappings to support increased air induction
- Steel intake piping w/ dual ram air jet vents attached to front fascia
- Adjustable cam gears set to allow for quick low gear acceleration
- Custom automatic transmission cooler w/ electric fan
- Custom-made intake manifold w/ larger, shorter runners
- Increased diameter throttle body
- Slightly larger fuel injectors w/ custom stainless steel fuel lines & rails
- Thicker aftermarket spark plug wires & appropriate plugs
- Engine bay strut tower brace/bar
- Rear seat floor strut brace
- Eibach sport springs & bushings
- Brembo rotors
- Aftermarket off-brand calipers & stainless steel brake lines
- Underdrive pulley kit

Together I spent enough money to create a forced induction custom kit for most any car, and would've had change left over to do some interior work.

The results took my 2.5L V6 6G73 0-60mph time from 8+ seconds to about 7... which is still pretty slow, especially for a 2 door coupe.

I did notice the car had some pretty decent 1st to 2nd gear transitioning. From a standstill, the engine, when floored, had much better throttle response than stock specifications. A short delay of about a whole second would occur, then the engine would kick in with a power curve from around 3 to 5700 RPM redline. With the rev limiter raised to 7k, the car's dual ram air jet system really helps the car accelerate in mid gear while cruising at a decent speed. Because of the auto tranny cooler, the shift from 1st to 2nd is VERY quick, it almost makes you believe you're driving an F1 tranny setup. But after that, you start to notice where the engine and tranny cap out.

I would say the greatest moments achieved with all these parts are when you'd be cruising around 45 mph, and you take the gas pedal to the floor. The dual ram air system feeds lots of cold, rushed air into the solid (no leaks), short intake piping, which is also assisted by a larger throttle body and larger, shorter intake runners in the manifold. 45 - 90 mph feels like nothing, and I had total confidence in taking the car further, but I didn't want to risk a speeding ticket at that speed.

So, for spending around 2200 bucks to make this car go faster, it wasn't worth it. Sure, it was fun to see a very slow, small displacing V6 do what it should be capable of doing, but I should've really saved my money... for only months down the road, my sister ended up wrecking the thing, and I landed my hands on a much more responsive (and sexier, sleeer looking) 1999 BMW 323iS coupe in black...

2.5L flat six (M52B25) w/ dual VANOS at stock settings is a pain in the ass, but once you drop money on just an intake system, ECU remap, and a freer flowing exhaust (~$600), this car does 0-60 in close to 6 seconds. I've spent around 1300 on a custom forced induction setup, and this baby does 0-60 in just a hair more than 5 seconds, tops out at 150 mph, and can rev to 7500 RPM (rated at around 350 hp)...

So I would recommend simply to save your money, sell the Avenger, and get your hands on a 6-cyl (or greater) rear wheel drive car that has a decent LSD. If you don't like the idea of paying for higher insurance for a car like a BMW, Mercedes Benz, Lexus, etc., Nissan's line of Z cars, Mazda RX-7 fC, Toyota's late 1980's Supra, or the older Audi 1.8T w/ AWD system would be things I would look at...