Each cummins generator has a model spec number description which is shown on the serial number tag attached to the generator.
Cummins j hook.
Here is a representation of the tag on onan qg 4000.
I have the tst and the j hook on mine just watch every once and a while mine seems to come loose and when i romp on it it acts like it has a miss.
This is a great product.
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The j hook regulates the waste gate facilitating greater boost numbers which rise even higher as performance modifications are added.
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.
The j hook uses a spring connected to the wastegate lever which controls the max boost pressure at which the wastegate opens.
Its also easier to take off the intake horn.
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.
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5 fatal flaws of the b series cummins.
A forum community dedicated to dodge cummins diesel truck owners and enthusiasts.
If you own a 2001 2002 model year with the 24v cummins upgrading your j hook is a cheap and easy way to boost power.
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.
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Im very happy with it now peaking at 35psi now just need injectors to help heat the egts up haha.
Awesome bang for your buck.
Despite all the performance potential and well documented durability the b series cummins is known for a lot of folks tend to overlook its shortcomings.
The higher volume of air will also help keep exhaust temperatures down.
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I just installed my j hook today.
Available for the 2001 2002 24 valve cummins engine equipped with the 47re automatic transmission.
An aftermarket hook will keep the wastegate closed longer which allows for higher boost.
Installs much easier than the bully dog j hook and you dont need to pre tension the spring.
