Got myself a factory turbo 2.8 rodeo. it's absolutley gutless and so I was thinking of doing a compound turbo conversion on it. Do we think this is possible?? If yeah, how would you guys suggest I go about it. Any issues I might run into?
cheers
Jack
compound turbo 4jb1-t
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dieselguy86
- Posts: 37
- Joined: Sat Jul 07, 2018 9:14 pm
Re: compound turbo 4jb1-t
Im doing this right now, its all about how much power you want. Simply adding another turbo to a diesel wont give you extra power, you need extra fuel with that extra air. You can have a very well-mannered engine with a single turbo up to around 200-220hp. After that youll either have to deal with smoke with a smaller turbo, a big single turbo that will lack low-end torque, or compounds.
On my 250hp build i need 38psi (2.6 bar) to have a smoke free air:fuel ratio of 25:1. 38psi of boost is pushing a turbo past its efficiency limits. So its easier to “split the load” to 2 turbos. The secret is getting them to each do half the work, and not have one turbo doing more work than the other.
But now you also have alot more plumbing, not only oil feed/drain lines but the exhaust and boost plumbing. Then your going to need to upgrade your intercooler because your going to have 300+°f (149+°c) air coming out of the second turbo.
Not trying to scare you away, just trying to shed some light on what all is required to not only add another turbo, but what it takes to build a PROPER system.
-Joe
On my 250hp build i need 38psi (2.6 bar) to have a smoke free air:fuel ratio of 25:1. 38psi of boost is pushing a turbo past its efficiency limits. So its easier to “split the load” to 2 turbos. The secret is getting them to each do half the work, and not have one turbo doing more work than the other.
But now you also have alot more plumbing, not only oil feed/drain lines but the exhaust and boost plumbing. Then your going to need to upgrade your intercooler because your going to have 300+°f (149+°c) air coming out of the second turbo.
Not trying to scare you away, just trying to shed some light on what all is required to not only add another turbo, but what it takes to build a PROPER system.
-Joe
Re: compound turbo 4jb1-t
Just blown away with the figures here, I can't get my head around how that is going to be applied from the engine to the wheels with out stuff breaking? I upgraded my power abit maybe 140 or 150hp max I get axle wrap u bolts keep needing to be tightened up and they look like they are weakening, my clutch is gone, my gearbox is starting to fail my downpipe keeps coming lose. its just falling apart now with the extra beans it was never deisnged for lol I can't see how rear SOA works with a lot of engine mods, the rear must wrap so badly
Re: compound turbo 4jb1-t
Build a 5 link around the rear leaves
Re: compound turbo 4jb1-t
99 rodeo has the small exhaust manifold and turbo, I run a bighorn manifold and vf8/vf10 2.8 bighorn turbo, with 3.1 bighorn dump pipe, with wound fuel pump on my rodeo and it goes awsome