I'd settle for a semi-complete parts list of the major parts and some slightly out of focus pictures!
Me too! Everyone's "How can I get more power out of my 4 cylinder?" threads could be answered with one link.
I suspect with a turbo you'd be able to get it close to stock 4.0 power levels, which would be enough for most of us.
I wonder if this is the controller he is talking about?
http://www.aemelectronics.com/produ...gement-systems/fuel-ignition-controller/fic-6
http://www.aemelectronics.com/produ...gement-systems/fuel-ignition-controller/fic-6
Interesting, I'm going to assume it is.
I don't see why it wouldn't work either. It's just a piggyback fuel controller. All you really need to be concerned about when adding a turbo would be the extra fuel necessary when under boost.
You'd probably also want some larger injectors as well.
I have to send those guys an e-mail and see if their controller will work with a Roots or Paxton style supercharger. For a TJ, it would be nice to get increased HP and torque from right off idle.
There's always the Bosch 4 hole injectors. We may have finally found a use for that mod.
I guarantee it would, no reason it wouldn't.
It's only job is to control the fuel.
You just have to find a way to mount the supercharger, which really wouldn't be that hard with some welding skills (you could fab a bracket). Then you just have to make sure all the vacuum lines on the existing manifold are moved above the supercharger, that way you aren't pushing boost into the vacuum lines, haha!
crackedcornish
TJ Enthusiast
the best way I've found to make the 4cyl feel peppier, besides gearing, is to lose weight...but admittedly I've not done any kind of forced induction
on my 2.5L YJ, I run a 5spd, soft top, half doors, no A/C, aluminum front bumper, aluminum skid plate, synthetic winch line on a light winch, alloy wheels, no rear bumper, and no back seat..been thinking about a 'glass/plastic hood, speedglass for the windshield, aluminum drop down tailgate, and full soft doors to lighten it even more
another added benefit to going lighter is less strain/breakage on the drivetrain, unlike a turbo or supercharger
on my 2.5L YJ, I run a 5spd, soft top, half doors, no A/C, aluminum front bumper, aluminum skid plate, synthetic winch line on a light winch, alloy wheels, no rear bumper, and no back seat..been thinking about a 'glass/plastic hood, speedglass for the windshield, aluminum drop down tailgate, and full soft doors to lighten it even more
another added benefit to going lighter is less strain/breakage on the drivetrain, unlike a turbo or supercharger
Last edited:
...and spark timing.
Pressurizing the vacuum systems would be all kinds of special, wouldn't it?
Paxton's are pretty easy, Roots are a little tougher (and bulkier).
Yup, you are totally correct. Gears and weight reduction are the only ways to get more performance out of the 2.5 equipped Jeeps. Unless you spend a ton of money. An $800 turbo setup is interesting though. That's less than a Super35 with new gears or a decent suspension system.
As a side note, the performance guys in Europe were getting 400+ HP from a 2.0 liter Saab 9.3 engine. With pretty good reliability. The wife had a Saab 9.3 and the engine wasn't a whole lot stronger than the 2.5 Jeep engine internally.
I wouldn't worry about engine longevity or reliability as long as you're running a reasonable amount of boost (no more than 8 psi).
If you want higher boost levels, you'd need to rebuild the engine with lower compression and forged internals (obviously).
But 6 psi or so on the stock engine would be just fine I think.
If you want higher boost levels, you'd need to rebuild the engine with lower compression and forged internals (obviously).
But 6 psi or so on the stock engine would be just fine I think.
Going from a vacuum to 6 - 8 psi is a lot of additional air / fuel mixture.
hmmm....I love me some turbos! I have an Audi with a 2.0TSFI and an F150 with an Ecoboost. The engine control has gotten VERY good on modern engines...to the point where turbo lag is nearly a thing of the past. I still notice it in the Audi (Its a Q5) because its so big, but the 3.5L in the truck gets me enough that I barely notice lag...until the turbos both spool, and I lay two stripes on the pavement!
Would be very interested in a wrangler turbo project. I'm sure most of the 2.5L stuff would apply to the 4.0 too...Nice thing about the 4 is that it makes enough torque that you would be good on low end and with a nice 30mm turbo or so, you have a decent bump for high speed cruising.
Would be very interested in a wrangler turbo project. I'm sure most of the 2.5L stuff would apply to the 4.0 too...Nice thing about the 4 is that it makes enough torque that you would be good on low end and with a nice 30mm turbo or so, you have a decent bump for high speed cruising.
Neumeyer
New Member
Ok I will take Pics tonight and post them.
Neumeyer
New Member
Turbo build price and parts.
Here are the parts and cost from ebay, t3/t4 turbo compressor trim 55, inducer 50.5, exducer is 76, a/r 0.5 cost $125.00. Header $145
Turbo oil lines return and feed $35, Silicone Couplers $50, Intercooler $88, Aem FIC module $350. I used 2.5" exhaust pipe for very thing.
Here are the parts and cost from ebay, t3/t4 turbo compressor trim 55, inducer 50.5, exducer is 76, a/r 0.5 cost $125.00. Header $145
Turbo oil lines return and feed $35, Silicone Couplers $50, Intercooler $88, Aem FIC module $350. I used 2.5" exhaust pipe for very thing.
Nice! Thank you!
Where did you tap the oil lines into? Did you use the stock mapping on the AEM FIC module, or did you get their software and do a custom tune?
JWjeepSask
TJ Enthusiast