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kkilla305

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#77174   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.