The j hook uses a spring connected to the wastegate lever which controls the max boost pressure at which the wastegate opens.
Cummins j hook.
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Each cummins generator has a model spec number description which is shown on the serial number tag attached to the generator.
The j hook regulates the waste gate facilitating greater boost numbers which rise even higher as performance modifications are added.
I just installed my j hook today.
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This is a great product.
Awesome bang for your buck.
The higher volume of air will also help keep exhaust temperatures down.
Its also easier to take off the intake horn.
5 fatal flaws of the b series cummins.
I think the vibration of the engine and the crappy roads around here jiggle mine loose because i have to go out and push on the hook and pierce the wire again.
Note the highlighted letter code in this case p which denotes the specification type of the particular generator which can then be referred to as spec p.
An aftermarket hook will keep the wastegate closed longer which allows for higher boost.
Here is a representation of the tag on onan qg 4000.
Mine is from the top probably easiest.
Installs much easier than the bully dog j hook and you dont need to pre tension the spring.
Before the j hook on stage 3 i would reach 21psi of boost 1200 degrees egts.
Come join the discussion about reviews drivetrain swaps turbos.
I have a 2001 ram 2500 with edge juice w attitude k n rv275 injectors from tst air dog fuel pump and now a j hook.
Im very happy with it now peaking at 35psi now just need injectors to help heat the egts up haha.
Available for the 2001 2002 24 valve cummins engine equipped with the 47re automatic transmission.
Story by mike mcglothlin.
Surges around 26psi but wide open doesnt surge at all.
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