Hi guys, iv been dabbling in turbo stuff for a little while, still yet to actually complete a turbo project, but have a fair idea of whats involved to get one setup, but my question today, is how do the stock 4.0 high output motors respond to a little bit of boost? like say, 5-10psi out of a variable vane turbo off a 3.3 diesel patrol ??
i know it would be small, but the jeep isnt exactly a race car, so would be ideally chasing quick spool off idle and low rev type response.
what do ya reckon? worth trying or should i just not bother?
stock headers are cracked in the usual spot. so they need to be welded up or replaced.
i figure i could cut them back from the flange and add some length to it and rejoin it slightly further down. or, completely remake it to suit a low mount turbo sitting just off the block.
or, while ive got that part of the engine apart, i could throw on the little turbo i have sitting around thats doing nothing and see how it goes.
im already fabbing up a 2.5 inch catback system, so a downpipe wouldnt be any harder to add.
my main reason for even contemplating the idea, is ive heard that once bigger tires go on it becomes a bit of a slug/pig unless geared down, right there could be where id be having boost and overcome the lack of power, well, with more power.
as was stated, its not something thats set in stone. but i do already have 90% of the bits required to set it up in my possession so wouldnt cost me a heap to get setup.
if its really that bad of an idea then fair enough. just wanted to get some feedback on it.
ive already jacked the rear of the bonnet, and plan on doing a thermo fan conversion anyway. ive already switched the a/c fan over to manual override.
yea, so already had an overheat experience. i got stuck in the mud up to the sills and the bay couldnt breathe. had to pop the bonnet to let it cool before trying again.
also, another thing im planning (summer it will hurt me...) but to remove the aircon and use the condenser on the front as one massive transcooler to keep trans heat out of the radiator. i could then use the existing transcooler within the radiator to cool the turbo oil feed???
i dont know guys, this was litterally a spur of the moment idea, i just wanted to put it out there to get some constructive feedback.
so far all im getting is that there is going to be complications.
if i told you that lifting your jeep meant that your panhard rod would be too short would you still go ahead? yea, its called a longer panhard rod.
besides the complications, of which im well aware there will be, what i wanted to know, was how well do the stock motors respond to boost. if its well, then ill more than likely go ahead with it. if the answer is not so good, as in like, "i threw 25psi at it and she only made 150kw atw" then, i know not to even bother.
do you know what i mean guys? im not trying to re-invent the wheel. i just want a touch more power without spending a near empty bank account.
things like, extractors/exhaust, later model intake, etc cost money that i just dont have at the moment. but, i do own a mig welder, a dremel, you know, diy tools and a fair bit of stuffs left over from my drift car build that i certainly dont mind playing with.
Well, from what I understand, researching the interwebs, the I6 in the XJ was an after thought. The XJs body just wasn't designed for an I6. Even with a stock car, a sub par cooling system will give trouble. There is no built in safety margin.
Turbos are, by their very nature, a hot bit of gear. The XJs engine bay cant really deal with this extra heat. Hence why a blower was suggested.
But, in saying all that, I have seen yanks slip jap turbo 6s into XJs. Dunno how they fair heat wise though.
And in answer to your original question, yeah, the HO 6 doesn't mind a bit of blow..... from what I've read....
Intentions are good but gotta agree with the heat issue.That will be your biggest killer especilly in the warmer months.After marker radiators and bonnet vents and even lifting the rear bonnet only help get under bonnet temps were they should be.Adding a turbo will be a big ask not just for engine cooling side of things but also the electricals under there would also suffer.
tbh, i havent really thought much, if any of it, out as to where things would go/layout of the whole shebang.
so, basically im thinking the turbo would live either directly next to the intake and throw boost straight into the TB, or, low mount it underneath the plenum (heat shielded of course) and run some sort of FMIC but, that creates lag. so... its all thoughts and ideas at the moment.
Okay, well as space and heat (reduced airflow) are your opposition I'd be suggesting you say goodbye to the A/C system entirely, that'd free up space around the manifold for the turbo assembly whilst reducing the radiator's airflow obstruction
Where were you thinking of fitting the inter-cooler?
__________________ "Facts do not cease to exist because they are ignored..." - Aldous Huxley
Hi guys, iv been dabbling in turbo stuff for a little while, still yet to actually complete a turbo project, but have a fair idea of whats involved to get one setup, but my question today, is how do the stock 4.0 high output motors respond to a little bit of boost? like say, 5-10psi out of a variable vane turbo off a 3.3 diesel patrol ??
i know it would be small, but the jeep isnt exactly a race car, so would be ideally chasing quick spool off idle and low rev type response.
what do ya reckon? worth trying or should i just not bother?
Its a different engine but the ford 4.0L XR6 Turbo only uses around 5 psi of boost in stock form and works great
I think this is mainly due to the straight 6 torque although the ford 4.0 does flow much much better than a Jeep engine
To the post super vs turbo it is all down to how both systems are set up, a smaller turbo that spools up fast will give low down grunt and with the jeep not reving much the loss in top end HP is not a big concern
Having said all that I keep looking at the super charged commodore and think they would make a great donor and apart from plenum which would have to be custom 90% of parts would be from the donor
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A Crowded lift will always smell different to a midget
my main reason for even contemplating the idea, is ive heard that once bigger tires go on it becomes a bit of a slug/pig unless geared down, right there could be where id be having boost and overcome the lack of power, well, with more power.
this wiill be another heat source
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Proud member of the "She'll Be Right" Gang
yes LEZ is my brother
Intercooler & oil cooler are a must if you are serious.
Every one says 5# will be the limit. Once its going it becomes 6 , then lets try 7 , then 8 & eventually a melted piston or a rod through the side.
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2001 XJ turbo dsl
I no longer question authority, I annoy authority. More effect, less effort.
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XJ turbo idea
XJ Sport - finally some mods - still long wish list
