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Rear Mount Turbo!?

Meethead

By Meethead
in Engines & Drivetrain

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Meethead Enthusiast

Meethead

Posted
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I took the truck to get a muffler swap done the other day. I noticed how much room is up in the cavity under the bed. My mind went straight to a rear mount turbo. I just want a little more power, not land speed record power but just a little more umph! I was curious if anyone has done this kind of awesome.

 

I would most likely do something simple like a re manufactured powerstroke turbo bolted up to the 3" exhaust and run the intake piping back up to the intake with BOV on the bend into the Throttle body.

 

I know a tune will be needed, just curious if Injectors will need to be upgraded or the cam will need to be swapped.

 

Again, nothing crazy. like 6-8psi

Sierra706 Senior Enthusiast

Sierra706

Posted
Posted

I have no experience in turbo kits, but wouldn't the distance decrease the power density of both the exhaust and the compressed intake charge?

 

 

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Meethead Enthusiast

Meethead

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I have no experience in turbo kits, but wouldn't the distance decrease the power density of both the exhaust and the compressed intake charge?

 

 

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Yeah the compression to the intake charge will be decreased if the piping is not correct for the turbo size. one benefit is that the charge air from the turbo back to intake will be cooled by the ambient air under the truck, this eliminates the need for an intercooler. Also the longevity of the turbo will be better as the turbo will produce less heat than if it was under the hood. some state 260 centigrade less heat than a turbo mounted under a hood.

 

Mounting a turbo in the rear would be an easy job as you dont have to get specific turbo manifolds to bolt up and brackets.

Brant78 Enthusiast

Brant78

Posted
Posted

Following. Looks like STS is in a rebuilding phase but I'd like to see what else is out there.

 

 

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bdbake01 Senior Enthusiast

bdbake01

Posted
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My guess would be that at 6-8psi, you'd be ok with just a tune. Pump and injectors should keep up. Cam won't be perfect, you would leave some on the table, but it'd work. Mounting would be piece of cake, just add some heat shielding.

L86 All Terrain Senior Enthusiast

L86 All Terrain

Posted
Posted

Rear mount setups are typically reserved for large turbo setups where hood room is non existent. I have only ever seen them used in drag racing setups where turbo lag is not a concern. Lots of room underhood now with the electric fans. Would love to see it though, toying with the idea of boosting my 6.2L once i have another work truck.

SouthernSilveradoGuy85 Senior Enthusiast

SouthernSilveradoGuy85

Posted
Posted

Not an expert, but wouldn't the extra length of the piping also cause more lag? The only time a rear mounted turbo in my opinion would needed is if there's no room under the hood without aftermarket or modding the hood. Teh first rear mounted kit I saw was for a Corvette (C6 I believe it was), but again no room under the room. I would also still run an intercooler. I don't think it would cool off enough in that distance to not need one. At least that's my non expert opinion lol. You just may be able to run a smaller intercooler, but I wouldn't take it completely away.

truckguy82 Senior Enthusiast

truckguy82

Posted
Posted

Not an expert, but wouldn't the extra length of the piping also cause more lag? The only time a rear mounted turbo in my opinion would needed is if there's no room under the hood without aftermarket or modding the hood. Teh first rear mounted kit I saw was for a Corvette (C6 I believe it was), but again no room under the room. I would also still run an intercooler. I don't think it would cool off enough in that distance to not need one. At least that's my non expert opinion lol. You just may be able to run a smaller intercooler, but I wouldn't take it completely away.

Yeah there is no way a few extra feet of charge pipe is cooling the intake air enough to replace an intercooler.

Chris Senior Enthusiast

Chris

Posted
Posted

The rear mount setups are actually legal in CA while a normal underhood setup is not.

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