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Zombie Survivalist
Joined: Feb 2009
Posts: 14,809
Likes: 3
From: Rock Springs, WY, USA
Well I have seen a 4WD ranger with a paxton supercharger, not a turbo but boost is boost. It was sometime in the mid 90s it was brand new and was in and out of our dealership with vacuum problems which were obviously not covered under warranty. IMHO the 4.0 is a good motor but not really something I would choose to throw PSI at. For prob the same amount of money you could put a 5.0 in that thing and have a really fun ride, I've seen many rangers and the swap is bolt in easy except for modifying the ac case a little. But to stay on forum topic I'm must recommend u put a straight 6 in your xploder lol. ALSO>>>sorry...but also I have seen 4.6 dohc motors in rangers from mark 8 donor cars, great engines! I bought my 93 mark 8 for 500 bucks like 4 years ago and drive it 100 miles a day to work and back! Buy my 4.6 engine and I'll put my 4.9 six in my Mark 8 and I'll put the 460 out of my 69 continental in my F150 hahhaha
Junior User
Joined: May 2010
Posts: 69
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From: FORT GIBSON
well thatd be all well and good, but theres no way i can do a swap for $200 or less. (yes, thats 200, not 2000) or even do a swap for that matter. i dont have the stuff to do one. but slappin a turbo on, thats somethin i CAN do. lol. when the ol 4.0 gives up the ghost, ill drop a cummins 4BT and a six speed in.
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Zombie Survivalist
Joined: Feb 2009
Posts: 14,809
Likes: 3
From: Rock Springs, WY, USA
lol. will do. if the 4.0 can handle the boost. know if it would handle 10 to 15 PSI? itd have to be a twin turbo setup cause the turbos are too small for the motor. they are made for 2.0s...
Junior User
Joined: May 2010
Posts: 69
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From: FORT GIBSON
I seem to remember that 4.0 in the ranger had like 6psi...not sure how it ran tho or if it could take more. The guy was handicapped and had levers for gas and brakes on the column, was a neat truck. If you do it get a blow off valve or what ever they use to control boost and turn that sucka down to like 5 and go up from there...also invest in a air/fuel meter and boost guage you dont want to get lean and blow the motor too quick. Those guages will run you 200 bucks lol so idk still I'd like to see whatever ya do
Senior User
Joined: Apr 2005
Posts: 357
Likes: 0
From: Anchorage, Alaska
Its not about "can it handle it". Its all about, "how well did you tune it to handle it". And how much pre-detonation have you ensued upon the engine before you even get it to run like it should with a turbo.
Right now, I'm running 7-8 psi boost with 90 octane on my ARP head studded 300 EFI and T04B turbo. I'm running hyper-eutectic pistons and ARP rod studs. So far so good...I run 5 psi on 87 octane all the time with no problems. I think I have about 1500 miles on this engine so far.
Slapping a turbo on is not as easy as it sounds...Boost pressure changes how the engine consumes air, and a turbo changes how it exhausts it. It's anything but plug-and-play.
I will say this, if you pick your right engine combo and fuel management system, with lower boost pressures, you can minimally and somewhat easily turbocharge and engine.
The 4.9 has a solid lower end. The head gasket is the weakest link.
Right now, I'm running 7-8 psi boost with 90 octane on my ARP head studded 300 EFI and T04B turbo. I'm running hyper-eutectic pistons and ARP rod studs. So far so good...I run 5 psi on 87 octane all the time with no problems. I think I have about 1500 miles on this engine so far.
Slapping a turbo on is not as easy as it sounds...Boost pressure changes how the engine consumes air, and a turbo changes how it exhausts it. It's anything but plug-and-play.
I will say this, if you pick your right engine combo and fuel management system, with lower boost pressures, you can minimally and somewhat easily turbocharge and engine.
The 4.9 has a solid lower end. The head gasket is the weakest link.
Senior User
Joined: Apr 2005
Posts: 357
Likes: 0
From: Anchorage, Alaska
The MAF will help out a bit. Your stock injectors/ECM will only give it so much fuel, definitely not 30 PSI boost worth! It may work up to 5 psi alright. The factory fuel pressure regulator won't compensate for boost pressure above atmospheric.
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Elder User
Joined: Jan 2009
Posts: 774
Likes: 1
From: East Tennessee
You are going to need some sort of tuner and upgraded fuel pump and injectors probably once you pass 5psi.
Turbos are no laughing matter, and engines that were designed without turbos in mind don't really have the right compression ratio for high boost. Boost doesn't mean ****. If you are 8:1 @ 14psi or 10:1 @ 8psi, as long as you are making the power you want should be all that matters.
20 PSI will blow these things apart on the stock internals, IMO. 300, 302, 351w, or 460. They just weren't built for this. Sure, stick some 7:1 pistons in there and run 15psi or something. If you want to run 20 psi... I'm thinking the rods will be one of the first weak points on your trip to that boost level. And I've owned 2 highly modded twin turbo vehicles, with one pushing 500 horsepower out of a 3.0 V6. One of those actually was pushing 20psi. I blew it up three times. I'm not directly comparing a Mitsubishi 3.0 DOHC 24 valve V6 (with aftermarket forged pistons and forged steel crank) to a bone stock 300-6. Not in any way, shape, or fashion. Just throwing it out there.
Turbos are no laughing matter, and engines that were designed without turbos in mind don't really have the right compression ratio for high boost. Boost doesn't mean ****. If you are 8:1 @ 14psi or 10:1 @ 8psi, as long as you are making the power you want should be all that matters.
20 PSI will blow these things apart on the stock internals, IMO. 300, 302, 351w, or 460. They just weren't built for this. Sure, stick some 7:1 pistons in there and run 15psi or something. If you want to run 20 psi... I'm thinking the rods will be one of the first weak points on your trip to that boost level. And I've owned 2 highly modded twin turbo vehicles, with one pushing 500 horsepower out of a 3.0 V6. One of those actually was pushing 20psi. I blew it up three times. I'm not directly comparing a Mitsubishi 3.0 DOHC 24 valve V6 (with aftermarket forged pistons and forged steel crank) to a bone stock 300-6. Not in any way, shape, or fashion. Just throwing it out there.
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