Right right right- ricer pansy crap. Ok, one of us said it, we can move on.
So a friend of mine is giving me a turbo for free. Currently my only vehicle is my SE Wrangler which I use from time to time to tow things. If you think the SE is anemic entering the highway without a trailer, you wouldn't believe what it's like WITH a trailer. The turbo is starting to look like a better idea for me right? I'm told by a local car guy that I can get the turbo in there for about $500 including an air ram intake, fabricating something for the exhaust to hook up the turbo, then running a connection from the turbo to the intake. I don't plan to worry about an intercooler or upgrade my fuel system so I'd only be running 7lbs of boost. Does anyone have any advice on how to do this? Can you refer me to someone who might be able to answer questions? Does anything sound glaringly wrong?
Depends on the turbo. A small turbo to kick in around 2500rpm's would be ideal it seems. Which would be roughly a mitsu 13g. I personally think that 7psi would be pushing it with the 2.5l, but won't know until it's all set. You would probably be looking at fuel issues once the thing is on as well.
Do a quick search, it has been talked about before and the information would definitely help.
actually it would be a tdo5 14g mitsu turbo. but you can turn the boost down if its to much i would think 5 psi would be enough. as far as the motor im not to sure about it but i know you can put a turbo on the honda 1.5l motors with no problem.
there is more to it than just the DISPLACEMENT on turbos....you need STRONG engine first. So tue hondas with small engines have turbos, but doesn't mean ALL the engines can have Turbos. You need a lot of things too...enough fuel to add to more air, and colder spark plug range , adjustable Fuel Pressure Regulator, Possible piggy back computer or reflash of stock computer if its possibleintercooler(maybe not for low boost), piping, custom turbo manifold and god only knows if the 4cyl jeep engine would hold up to any type of forced induction. if it's not meant for it, something's gonna break and installation would cost you a fortune.
Turbocharging a jeep, because it doesn't use a mass air flow sensor, can be very difficult. The fuel delivery will be the biggest problem. You'll need to increase the fuel pump size to flow more fuel, injectors to put out more fuel and somehow reflash the computer to allow for these changes. In other words it would be cheaper and easier to swap in a chev v6 or v8 and the necessary driveline components. JMO.
14b And as far as the boost goes, with the standard 14b's wastgate spring set to anywhere between 8-12psi. So it's not going to boost any less than that unless you get a lighter spring.
a turbo would not correspond with the powerband of the Jeep's cam at all. It would be an incredibly worthless mod. On the other hand, check out my review (or thread) I started yesterday on the Avenger Supercharger. I was lucky enough to get a "test ride" in the company owners vehicle. It is a roots blower with instantaneous boost. This is what you want on a Jeep for any kind of forced induction. This guy has a legit 350hp I-6 with only 5 lbs of boost and drives it everyday.
O2 sensor readings and another type of air metering system that isn't quite as good as MAF, the name is escaping me at the moment, but do a search on turbos or superchargers and it should come up somewhere.
Volumetric air metering is vaguely familiar, but I don't think that is the one that they use, do a search on it??
Edit: they use speed density tables stored in the pcm. refer to the other post near the top of the tj forum about riding in a supercharged jeep.
Listen, it can be done and the naysayers are ignorant as to how turbos work.
I am just VERY tired of outlining everything in forum posts when in reality the chances of the user actually going through with it are slim to none.
The fuel issues are not a big deal though, and YOU DON'T need a new pump as one poster said. the 2.5L and 4.0L use the SAME pump, it can supply enough fuel for a modified 4.0L it can easily handle a turboed 2.5L. You will howver need to redo the topside of the pump housing to accept a remote filter and regulator.
TJ's use a MAP sensor to determine fuel metering while in open loop, otherwise if they depended on the O2s they wouldn't run until they are warmed up. You would need to reroute your MAP to upstream of the turbo so it won't register boost and only vacuum.
6psi is about the realistic limit for the stock 2.5L, it has PLENTY of bottom end strength.
I don't know enough about the turbo you were given to give you much help, but that is the most critical part of the equation. The smaller turbos from 2.0L sports cars should provide boost off idle like a supercharger and not significantly interfere with the cam profile.
sure it can be done, just like you can put nitrous on a Jeep, or lower one and put 20" wheels with spinners on it... fact of the matter is, its not practical in any way shape or form.
And to the person that says they have some "left over" turbos from a vr-4, ahhahaha-ehehehe-hohohohhohhhoh....good luck :thumbsup:
I dont know the difference between a turbo and a supercharger but they is a guy out of Greenville, NC who runs a supercharger in his Tj and its nasty. The cool thing is that you can hear it when he is rock climbing... I say go for it
The fuel issues are not a big deal though, and YOU DON'T need a new pump as one poster said. the 2.5L and 4.0L use the SAME pump, it can supply enough fuel for a modified 4.0L it can easily handle a turboed 2.5L. You will howver need to redo the topside of the pump housing to accept a remote filter and regulator.
I 100% agree if you plan on running a "small" turbo with minimal boost.
otherwise if they depended on the O2s they wouldn't run until they are warmed up. You would need to reroute your MAP to upstream of the turbo so it won't register boost and only vacuum.
True to an extent. A new O2 will kick in and start sending proper voltage seconds after the start up. Once it starts getting carbon build up it'll take longer and longer to start sending voltage.
I don't know enough about the turbo you were given to give you much help, but that is the most critical part of the equation. The smaller turbos from 2.0L sports cars should provide boost off idle like a supercharger and not significantly interfere with the cam profile.
The smaller turbos will work. But careful, I really think that the Evo's 16g or even possibly the 90-94 DSM's 14b might be a little too big. But it depends on the compression of the 2.5L which I have no clue what it is.
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