Another thing- replace that old pyro probe as it might be giving inaccurate readings

 

it is in the center of the exhaust manifold about 3 inches before the turbo

 

If someone told you to get a sled puller 66 for your set up, run the other way. I don't think you have near enough fuel to spin that turbo, it would lag real bad and your egts would be worse unless you're running WOT all the time.

If you're going to get another turbo, you have to concider if you want to keep you exhaust brake or not? A hybrid 35/40 might be a better turbo for you to look at if you're going to keep the Jake.

 

Still it might have gone bad and its worth a shot replacing it.

 

Just drove the truck and unde hard acceleration i am getting 32 lbs of boost

 

Cummins did it when they rebuilt it

 

The advanced timing will produce more thermal loading of the internal components (piston crowns, cylinder heads, etc.) for a given EGT than the stock engine configuration. By advancing injection timing, we start the combustion process earlier in terms of degrees of crankshaft rotation, so the piston crown is subjected to combustion temperatures for a longer period of time (i.e., more degrees of crankshaft rotation) before the exhaust valves open than would be the case with factory injection timing. That, plus more fuel from the larger injectors, means that the oil cooling of the piston crowns may no longer be adequate at a sustained load that produces an EGT of, let's say, 1200 degF. Also, the additional boost that many of us are running may lull us into a false sense of security - the heat balance of the engine has changed with the additional fuel and timing advance, but the additional airflow makes us think everything's OK because it lowers EGTs relative to the higher power output.

Just something to consider.....

Rusty

 

so how do i saftly drive it without another meltdown ? it doesn't get beat on, slow acceleration, minimal upgrade acceleration, 3000 oil changes cruising interstate speeds of 60-70 mph.

would there be a considerable advantage to going to a larger turbo ?

 

Sure, more air is always good, but the trick is to find the right balance, cooler egts without too much lag, lag too some degree will increase egt's within a certain rpm range. I have a large turbo, but don't tow heavy, so can't help ya much. Have you thought about going with a set of towing twins? The only sure way with a stock turbo is to lock out overdrive and let it rev going up steep grades..

 

ALWAYS do and have