Detroit DDEC-IV EGTs

I am in the process of picking up an 07 century with a DD S60 in it. Going to have them do what they can with the stock DDEC and in the mean time save the pennies.

If I am understanding you and the rest.

I delete the EGR and have the ECM re-flashed.
Install a BW 171702 (470-500 hp)
Have the engine tuned to max torque for the drive-line. In my case, 1750 lb/ft. I think if I understand the DDEC specs, that's actually at 470 hp.


Where is the best place to pick up the BW?

 

Just call around and see who has the best prices on NEW not reman

 

i have a wastegated turbo on my '03 430/470,i truly think that it is the previous owner's fix,idk,but anyway,the turbo heat shield dropped on top of the waste gate plunger,the blue line goes into it,and rubbed a #### hole in it.


my remedy to bypass the waste gate was to drop a metal ball into the blue line,thereby bypassing the plunger and wastegate entirely.seemed to work fine for a long while but now i am hearing the swoooshing or air noise fron turbo side of engine while under pull and at times when not loaded.it seems as if my temporary fix was just that.


what can i do to truly bypass the wastegate/plunger but keep it all hooked up as if it is all intact? or can i just plug it forever somehow ? the wastegate/plunger is like $350.00 if i recall.I am not going to buy one and plan on going to the bw turbo soon,but in the meantime-

many thanks

 

I would wonder why you wouldn't just go with a better non waste gated turbo and forget all that nonsense. It is not the best thing to bypass the waste gate and have it non functioning. With the small turbo housing, you could have more problems and maybe even blow a turbo in the future. Going with a non waste gate turbo with larger housing will solve all those problems, and your engine will appreciate it also.

 

Sorry to also bring this thread back to life. Looks like there is no answer to this question on the web. Figured I'd ask it while I'm here before I call someone. I have the DDEC V VNT style turbo. Why can I not find a blanket for it on the web?

 

I would not put a blanket on a vnt. The vanes in the vnt are sensitive to temps and I would be afraid of having them bind.

 

Sorry, not totally on subject here but I saw Cowpie and Rebel in this thread and you two seem to know your Detroit engines. Just bought 2 Columbia gliders - 1 from Fitzgerald and 1 built by a local Detroit shop (both with the '98 12.7). The Fitzgerald came built with a ported and polished manifold and a BW turbo. This truck has great power and gets close to 7 mpg (70 - 80k weight) running across PA and OH on I-80. Wish I had been on this forum before using my local Detroit shop. That truck on the same routes with the same drivers can't break 6 mpg and the drivers say that it doesn't have near the power of the Fitz glider. Both have lp 22.5 tires at 3.42 with 13 speeds. Both engines set to 500 hp and 1650 tq. Something else must be going on with these 2 trucks. Can I really gain a full mpg and 100 horsepower (guessing) to the ground just by changing the manifold and turbo? Do these 2 items go hand in hand or can I just throw on the BW turbo and see an improvement?? I'm not excited about spending another $3k to change the manifold and turbo - the local shop was already $5k over Fitz's pricing.

 

I would not worry about the manifold for now. I do get mixed reviews but the way i look at it is if your manifold is not broke then leave it if it is cracked then I would look at the upgrade. As for the turbo if you do not have a BW171702 then that is a great upgrade. The tunes in the ECM could be totally different as could the inj cam and so on you may have to look at the parts in each engine for a fair comparison.

 

Thanks for the help Rebel. I'll change out the turbo and see what happens. I sent both of these trucks into a shop to get top speed adjusted and they confirmed that both engines are set to 1650 and 500. Only difference was the injector settings. Fitz had all of the injectors at .75 whatever that means and the other engine is set per Detroit Diesel specs according to the shop.

 

There are many different calibrations that are 500hp 1650TQ. Do you know the model # of each engine? The 75 code is the way that you even out your injectors. Setting them all to 75 was a way to get a little extra out of them If it runs smooth then it probably OK.