Can I install a supercharger on a stock 4.0?
- Thread starter Haroon
- Start date
CMTJ
TJ Enthusiast
Tj04
TJ Enthusiast
Im interested in it now after reading some about it too, Cant justify the cost. I could get an XJ for that price! but i hope you get one and report back.
No problem. $2500 is insanely cheap for a complete supercharger setup. A similar setup for almost any other vehicle would be at least $5000 plus.
Certainly cheaper than a V8 swap, right?
Yes, it is...IF, and this is a biggie, your engine is in good shape. Adding forced air is a pretty good way to pop a NA engine that has some things worn...
jeepXcore
TJ Enthusiast
Oh wow, I didn't realize the went for the low a price. I thought it would be like 5K. Deff going to look into one of these in the future. Always dreamed of owning a vehicle with a little supercharger whine
Not too much you have to worry about with an iron block, iron head, tractor engine haha.
Maybe if you had 300k miles on your Jeep, but even then, it's not really engine internals I worry about with these engines.
Forced air induction engines tend to eat the pistons, cranks and rods when things go sideways. Valves as well. Something to keep in mind.
Its not so much the pressure, but the issue of going lean. You start pumping a bunch more air, that isn't being managed properly, and as @StG58 said, you'll start to melt pistons. Low compression with a bigger air fuel charge means more unburned fuel in the exhaust...which can stick a valve stem or burn a valve seat. Too much compression from a carboned up piston will cause pre-ignition...and that can bend a rod, etc.
Its just something else to think about. There really isn't any thing "free" There is always a tradeoff.
Very true, most people end up popping their engine because of going lean, I agree. I guess all you can do is hope that you've got everything dialed in right.
I'm a bit of a risk taker though. Going on several years with the supercharger and no issues at all. Time will tell I suppose! I'll report back in 5+ years and we'll see if my engine is still healthy then.
So, I'm sitting here drinking my morning coffee, attempting to get my shit together and nursing a brand new root canal. I reread this whole thread, because I like supercharged engines a lot.
I don't think I like you guys a whole lot right now. You're going to cost me a grip o'cash unless I immediately go check my bank account. Visions of a 2003-4 TJR are floating around in my drug addled mind. All the various bits and peices for a nice blown 4.0 with a tasteful suspension. Why-o-why do I hang out here.
Oh, l misspoke earlier. It was a screaming Jimmy 4-71 blower not a 4-53. Doesn't really matter, but the details should be correct.
I don't think I like you guys a whole lot right now. You're going to cost me a grip o'cash unless I immediately go check my bank account. Visions of a 2003-4 TJR are floating around in my drug addled mind. All the various bits and peices for a nice blown 4.0 with a tasteful suspension. Why-o-why do I hang out here.
Oh, l misspoke earlier. It was a screaming Jimmy 4-71 blower not a 4-53. Doesn't really matter, but the details should be correct.
Come on, @Chris, you know you want to start messing with drive pully sizes. I can feel it!
Only problem with a stroker and a blower would be relatively uncharted territory. You'd have to know what you were doing (or pay a WHOLE BIG WAD of cash to a tuner) to get the fuel map correct. The bolt-on kit that @Chris linked is probably the easiest, and cheapest way to genuinely increase power on a 4.0L. But you'd want to start with a stock engine I think. Maybe the company making the kits would know how to tune it for greater displacement...
I will say one of my wheeling buddies has a XJ with a stroker. That build really adds some low end grunt. He's running 35's with 4.88 gears and the AW4 transmission. Never seems to lack for power, unless we're already doing 75 on the highway. Its almost boring to wheel. Its VERY capable.
I will say one of my wheeling buddies has a XJ with a stroker. That build really adds some low end grunt. He's running 35's with 4.88 gears and the AW4 transmission. Never seems to lack for power, unless we're already doing 75 on the highway. Its almost boring to wheel. Its VERY capable.
I've already got the TJR...You supply the supercharger and I'll let you live vicariously through me!
Wish I could see the tj turbo in person from banks . I’m sure that’ll be my solution because why not.
Still considering chris’s supercharger tho.
. I’m sure that’ll be my solution because why not.Still considering chris’s supercharger tho.
Supercharger > Turbocharger (in our application) Superchargers can be set up to provide boost (and power) from right off idle all the way up. The power is very linear as well. The downside is that a supercharger takes a certain amount of power to spin, and that power is used no matter what. A well done supercharger is simpler in the grand scheme of things than a well done Turbo setup.
Then there's the centrifugal superchargers...
Then there's the centrifugal superchargers...
My interest in it is I’ve met a ton of jeepers who have superchargers on their jeeps, but I haven’t met anyone running a non ebay turbo. More curious than practical at this point. Turbo company makes some bold claims and don’t see any true dyno charts unlike chris’s supercharger
.Edit: this is about as good as I’ve been able to find.
Honestly, he bought it from someone he worked with, and I doubt he even knows much about that part. It just plain works...