This was a DDEC III, an early 98 GK model, there is no waste gate. It is now is DDEC IV. This is actually in a bus...I have Kevin Rutherford's scan gauge hooked up, it is telling me my max boost is only 20 PSI. I've seen the later models with waste gate perform much better off the line, and in general acceleration from going to idle on the throttle at lets say 20 mph, to mashing the throttle because that red light just turned green again. There are only three settings, 370, 400, and 430, and I have it set to 430.
I want to make sure I spec the right turbo, the max HP I will get is 500-550. I know the 171702 is for higher horse power, but if I don't have the horse power, I want to make sure I'm not lagging.
If I update the manifold, what is the typical labor rate on that? My other concern was having exhaust stud's snap off.
What are the advantages to not having a waste gate? I'm under the impression, the waste gate gives you better spool. But, you're saying the 171701 is similar, but has no waste but manages to spool faster? Lastly, no the highway it's my understanding a non waste gate flows freely for better fuel economy. I'm not too concerned about fuel economy, the difference is probably nominal.
Thanks.
BW 171702 VS BW 172743 waste gated in 12.7 Series 60 Detroit
Discussion in 'Trucks [ Eighteen Wheelers ]' started by allisonisatranny, Apr 2, 2017.
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