4.0 ohv turbo charger

[jds3403]

Anyone looking to turbo their 4.0 ohv? I have done some research as far as calculating correct turbo sizes fuel flow air flow etc. for all kinds of power levels if you need help feel free to leave question as i am about to turbo my 4.0 w/ remote setup and use a to4b s-3 trim .63 ar hot side turbo. great turbo for this motor @260-270ish hp @ fly wheel whcih is a conservative hp est.

 

[Twizzler09]

did you build up the internals of the motor? The 4.0 OHV can only handle 3-4 lbs. of boost before shit starts breaking, so I've been told.

 

[jds3403]

the motor should be fine as long as some simple guide lines are followed, do not over boost past a certain level set by your good judgement. Lets face it these motors are not meant to be drag machines. Any one who has cracked open this motor before can tell you that just look at the shitty heads small valves extremely small ports. Getting air into this motor is difficult as set by the factory so the only route to go is other than naturally aspirated unless you are pretty rich and in this case why would you be moddin a ford 4.0? That said, use your judgement when boosting set 10 lbs max as a starting point. if you cant control detonation then drop down to 8 so on and so forth. if your motor already has 120k on the odometer and you know you need a rebuild don't boost it if you know you have a knock coming from other than the valve train dont boost it. I have found that most motors built recently can handle safely 10 lbs of boost with out adverse side affects as long as the simple guidle lines are followed. basically dont be a retard if you boost it and shit wont break. look at the sohc 4.0 it was designed with the same purposes in mind an economical cheap efficient powerplant. ford didnt use racing rods or billet cranks because its purpose did not warrant this in the design. but people every day are boosting these engines with super chargers and are routinely running 10 lbs or more with no bad side affects because they are not being stupid with these motors. ie no lugging @ WOT @ 2000 rpm max boost for example. These motors are not designed for 500hp with out any internal mods. but @ 10 lbs around 270 hp can be expected with only few mods limited to fuel mods. that is not asking a whole lot from the stock bottom end seeing as less than 1% of the motors time will be spent @ WOT. Also running almost a 4 inch bore helps to distribute some of the load dislpaced on the piston more evenly helping to further reduce stress on the rods. I would safely think that the motor can handle a whole lot more than 3-4 lbs max. who ever said that... well... damn..... ha ha ha ..... hope this helps any one who reads this feel free to chime in. thanks

 

[Twizzler09]

Ah, thanks for the explanation.

 

[63'sprint]

I actually posted a new thread on this before I saw yours, So pardon the redundancy, I am thinking of trying a holset HY35 of a cummins, Not sure of the AR's but I here they run them on 2.3T, for extreme applications. Looking to run 8-10 PSI with a air-to-air also out of a cummins(Narrowed about about a foot).

 

[rattlinram330]

You do know that HY is capable of pushing over 40 psi. Isnt it a little big.

 

[johnjohn]

Anyone looking to turbo their 4.0 ohv? I have done some research as far as calculating correct turbo sizes fuel flow air flow etc. for all kinds of power levels if you need help feel free to leave question as i am about to turbo my 4.0 w/ remote setup and use a to4b s-3 trim .63 ar hot side turbo. great turbo for this motor @260-270ish hp @ fly wheel whcih is a conservative hp est.

I'll take you up on your offer.

I'm looking at twin Garrett T0335's Dodge 4105800, 466298-7 from a 2.2L

described here
http://forum.miata.net/vb/archive/index.php/t-187999.html
OE part#: 466298-7, 466298-4
Compressor Trim: 50
Compressor housing A/R: .42
Turbine Trim: 69
Turbine housing A/R: .48
Horsepower Capabilities: ~275hp
Internal Wastegate: Yes
Water cooled: Yes
Wastegate setting: 7 psi

7 psi should be lots and anything around 275 HP will be plenty fun.

the mill is a babied 4.0 out of a 93 Explorer with 220,000 km. every oil change, and the TV cable popped off the transmission burned the transmission down.

let me know your thoughts.

 

[F-22Raptor]

I'm still in the early stages of looking for a turbo for my 4.0 ranger with 144k on it, i have no idea whether it has been rebuilt or not as i bought it used at 136k. But its looking like i will need a smaller turbo then i thought. Do any of you have any suggestions as to a quick and simple install but that seems the most logical to put in my ranger? the engine is running close to fine currently and hasn't let out on me yet. So I'm open to suggestions if anyone could help. Thanks