That turbo is good for 550 hp. I wouldn't worrie about the wastegate at your power level honestly. Just make sure it stays closed if you take off the canister.
Should be nice and responsive and burn clean with real low egts.
If your boost stays under 30psi with canister off then your fine.
3406b turbo upgrade???
Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by 704mover, Mar 8, 2018.
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We have always measured egt from manifold, this probe is down stream in the exhaust pipe about 6-8". -
When I had my 4mg I never like going over 1000degres. The probe was in the down pipe same place.
I bet you cant get it over 750-800SAR and spsauerland Thank this. -
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SAR Thanks this.
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Oxbow, if you adjusted your wastegate a bit for more boost you could get your egts down
A good running 4mg should be able to produce 30-32 psi with that turbo.
That's with the screws opened up.. -
On mine the max boost that I get is 24 to 27 depending on mostly ambient temperature. I honestly don't understand why it varies because pressure is pressure, but boost is measured after the CAC, so maybe that is the difference.spsauerland, SAR and 894964f Thank this. -
SAR Thanks this.
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Yes you adjust the rod for more preload against the spring. Another way you can do it is to put washers between the mounting bracket and canister on the studs. A couple washers on each stud usually good for 2-3 pounds boost and cooler egts and a stronger jake
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