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camarofan

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#1   2015-06-30 05:14          
Well guys, it's been awhile. Times of doing nothing but janky wiring and basic mods were done to the Explorer, another drop was done, and the final is on the way. Now it's time to do the serious shit. I got a turbo off my buddies Talon TSI for cheap with full intention to put it on the truck, and hopefully not need to tune it, because i'm cheap, broke, and the truck is haggard. Now, my main problem is..I know nothing, i know exhaust gas goes in, magic, air goes into the intake, boom; power. Oil supply and return is already planned out, but i still have two extra ports, a buddy told me that's for overflow, but i looked at the Talon and it has some funky lines running to the head, and one that goes behind and under the turbo, so i'm guessing the block.

I'm sure i can flip the factory manifolds and run it as a front mount turbo, not a sketchy fender/low mount. I also have no idea what flange it is, how i'm going to run exhaust because i didn't take into account the built in wastegate(separate pipe? BOV maybe?) It's going to be a learning experience, and i want this to happen.






The last recent picture with the American Racing rims since the camber ate the front tires


Any help would be greatly appreciated guys!

gt3076r

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#2   2015-06-30 05:20          
What engine does your truck have?What exactly do you intend on doing?Going NA-T with it?if so, it's more than just slapping a turbo onto a sketchy manifold and running the exhaust. Going NA-T on any engine is a lot of work to do,especially when it comes to getting a proper manifold done for an uncommon engine,internal work, drilling oil return lines, running a proper management system (Yes,why the fuck would you go NA-T if your management is off) amongst many other things. It isn't exactly a cheap process either. Cut corners and you'll have to spend more cash than you thought you'd ever need to. If I were you, I wouldn't even go around flipping a manifold upside down,especially where it doesn't line up with the gasket. Big problems there. All in all, the least I could say is that you should be prepared to spend quite a bit of cash on what you're planning to do. I was planning to go turbo on my SR16VE but it simply does not make any sense. Getting a turbocharged engine will save the headache in the long run.
STANCE ARMY
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camarofan

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#3   2015-06-30 05:42          
The 4.0 OHV V6. I just to have fun with it, it's already kind of quick when it's decent out, but i want more. I don't plan on running more than 5 psi. I've done my research, it can run around 5 psi all day no problem with the factory specs. I've seen plenty of DIY builds with some sketchy work that lasts. Wastegate pressure on the turbo shouldn't run a bunch of PSI, and if it does i'll buy a controller and run it lower. I'm on a budget, and i'm going to talk to a local shop on a price-tag to get the truck looked over and running right after i get it turbo'd.

And by flipping manifolds, i mean both. drive to passenger and vice-versa, i kinda of want the exhaust out the bumper, but it all depends.

If all fails, I have a back-up car to drive until i can either rebuild the 4.0, or get a swap ready.

I know it does have some slight play back and forth, but like i said, it's not going to be working very hard, and rebuild kits are fairly inexpensive.

Edit-- There's a lot of turbo builds with these motors, In Georgia there's a shop that will build and tune the motor to withstand 20+ psi, even twin turbo anywhere from $4,000 to $6,500..I can't save that much soon enough to get it done before i die.

dxg1997

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#4   2015-06-30 16:21          
that vid is for the 5.0, or rather, the V8. from a mustang. He's got the 4.0, which is sohc. the 5.0 is pushrod ohv. I ran into the same problem with the legacy. wanted to do some headwork on it, but its sohc, and the vid i found was for the 2.5L which is dohc.

camarofan

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#5   2015-06-30 18:54          
No, it's the OHV 4.0. the SOHC is shit, and the cassettes fall apart. What video are talking about? I've seen video's of turbo V6 Explorers, still the shitbox auto, and still holding together.


I'd gladly rip my truck apart and do a roller rocker setup on the heads, do the cam aswell, new intake bigger injectors, fuel cell, ect ect, bolt on shit.. Except the price tag for something as small as an intake for the motor is beyond crazy.. $800 for a twin t/b intake, $880 for the roller rocker kit, the cheapest set of heads is $700, and they go up to $1,700. ARP studs are $220.. You get the point, some of the smallest shit is crazy ass prices.

kkilla305

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#6   2015-06-30 21:10          
The hard line on the turbo is for watercooling. Just a heads up, your 4.0 is gonna be displacing a whole lot more air than that little 16g was designed for, so eventually you'll just wear out the journal bearings and puke oil.

To make it short, to turbo a car and make it last is an investment. Not even just in internals.

A list of parts essential for a turbo car right off the top of my head are:

-Fuel pump (Walboro 255lph recommended)
-Fuel pressure regulator
-Injectors
-Air-Fuel ratio management (something like an apex-i safc or greddy e-manage)
-Wideband AFR sensor and gauge
-1 or 2 bar MAP sensor
-Oil feed line (for turbo)
-Oil drain line (you're also going to have to tap a hole in your oilpan for a fitting)
-Blow off valve

And then you have your obvious essentials like your exhuast manifold to mount the turbo, a downpipe with a bung welded in for your AFR sensor, your hotside chargepiping, intercooler, and coldside chargepiping with a flange for your blow off valve. Also couplers and clamps for all your piping connections.

It would also be a good idea to do a compression test before doing anything and then looking up the factory compression just to see if it's any shape to even have a turbo strapped to it.

There are probably some other little things I'm not remembering right now. Regardless this gives you a good idea of what it takes to turbocharge anything.

camarofan

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#7   2015-06-30 22:50          
With the hard line? the only line on the turbo right now? And i get all of that, but is a BOV actually necessary? the fuel i figured, the MAP? Isn't that different than a MAF? i'm already looking at a 70 or 90MM, as for the air/fuel management- a tuner could control that right? i have an AEM wideband, i'm just waiting on the funds to get the sensor and the harnesses. and i know about the oil supply and return.

And must i run an intercooler? or could i just pipe it straight to the intake since it's a low boost setup.

And i know the 4.0 takes in more air than the 4G63, but after i get everything setup, i can look for a better suited turbo.

I still don't have confirmation on what the other two ports are for.


And just for clarification-
Hot side charge piping goes to the intercooler, and the cold side goes from intercooler to intake, right?

I've contacted a guy who's running 18PSI reliably on his 4.0 OHV Explorer, i'm waiting on a reply to see exactly what needs to be done to the motor other than the air/fuel delivery.

dxg1997

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#8   2015-06-30 23:00          
# camarofan : No, it's the OHV 4.0. the SOHC is shit, and the cassettes fall apart. What video are talking about? I've seen video's of turbo V6 Explorers, still the shitbox auto, and still holding together.

Someone had posted a vid about replacing heads on a 5.0 explorer.

camarofan

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#9   2015-06-30 23:46          
Oh.
The guy responded.. Kkilla, you're right. the turbo is way too small, i guess a GN turbo can work, but the way my budget is, it'll be a while until i can afford that. But, i found out all i need is injectors, i already have a MAF off a V8 Lincoln. I can flip the manifolds, and i can run the return line to the pan.

kkilla305

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#10   2015-07-01 20:44          
# camarofan : With the hard line? the only line on the turbo right now? And i get all of that, but is a BOV actually necessary? the fuel i figured, the MAP? Isn't that different than a MAF? i'm already looking at a 70 or 90MM, as for the air/fuel management- a tuner could control that right? i have an AEM wideband, i'm just waiting on the funds to get the sensor and the harnesses. and i know about the oil supply and return.

And must i run an intercooler? or could i just pipe it straight to the intake since it's a low boost setup.

And i know the 4.0 takes in more air than the 4G63, but after i get everything setup, i can look for a better suited turbo.

I still don't have confirmation on what the other two ports are for.


And just for clarification-
Hot side charge piping goes to the intercooler, and the cold side goes from intercooler to intake, right?

I've contacted a guy who's running 18PSI reliably on his 4.0 OHV Explorer, i'm waiting on a reply to see exactly what needs to be done to the motor other than the air/fuel delivery.

Yeah, the hardline already on the turbo is for coolant feed and the port on the opposite side is for coolant return and same goes for the other two ports, one is your oil feed and the other is your oil return.

Technically you can run without a bov, but that will just shorten the life of your turbo because once you let off the pedal and the throttlebody is shut all that extra boost pressure has no where to escape, so it backs straight out the compressor side of the turbo, which makes that choppy "sususu" noise people like.

The MAP sensor is necessary for a piggyback AFR controller. It senses boost pressure so it can enrich the mixture with more fuel to avoid running lean and detonating. There's no way to control your AFR without either some form of piggyback or an ecu with a daughter board and a port for tuning, which I'm not entirely convinced is available for a 4.0 explorer.

An intercooler is a good idea. Running hot air straight back into the intake is just going to induce detonation and just cause general heat soak meaning less and less horsepower on consecutive pulls or after a long drive.

camarofan

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#11   2015-07-02 20:29          
But the opposite end is for the oil return. And that's shitty. Is there a way to bypass the water cooling? How would i even run that, the radiator? I may end up going to a GT35(Ebay, i know, but i can't afford a $500 turbo for/off a Buick GN right now) I love the turbo flutter sound, but i'm trying to go for reliability so i guess i'll have to find a BOV i like. And i already have a tuner picked out. It's more a piggy back, adjusting and shutting shit off on the factory computer, but i believe it reflashes. The factory ECU would adjust AFR's, and timing, so i'm sure it would be fine. And i'll probably look for a smaller intercooler, or a cheap one anyway.

Thanks for the help. I didn't realize that they had water-cooled turbos in '95.

kkilla305

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#12   2015-07-02 21:58          
You could potentially just block it off, but I'm not sure what that would do for the turbo's longevity. I believe on 4G63's the coolant comes from and returns to the thermostat housing. On the Ebay side of things, I would look toward CXRacing or Godspeed. They make reasonable quality bolt on turbo upgrades.

No problem, and yeah, watercooled turbos have been around a long time. My 87 Supra even came with a watercooled turbo.

camarofan

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#13   2015-07-02 23:03          
Awesome, and i've read some forum posts, and i notice they get warm, or they stay decently cool. it depends on the setup i guess. I was looking at a CXRacing turbo, It seems more in price range of things, a buddy has an ebay one he says is balanced, but i wasn't going to risk it, not when theres a I.D plate on the chargepipe outlet.
And i've noticed in my search for just oil cooled that they're pretty scarce unless you go big.