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Message |
Greg Roberts (Eagle 20) (Gregeagle20)
Registered Member
Username: Gregeagle20
Post Number: 254
Registered: 4-2002
Posted From: 66.18.167.76
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, April 28, 2009 - 9:17 pm: | |
I have a 1989 6V92 DDEC II that was originally programmed for something below 300 HP and max RPM of 1900 with 1020 torque. I had a Detroit dealer burn in a new DDEC program to 350 HP and max RPM of 2100 and torque of 1050. That particular dealer was not too sharp on the 2 stroke engines and they "thought" that the same turbo would work for box settings. I am not too confident that this is accurate information. Her is the question: Do I actually need a different turbo for this program to actually get the full HP and torque?
A second question: What would a higher volume/pressure turbo do for me and would it work without damaging the engine (of course not allowing the engine to over heat)? |
Greg Roberts (Eagle 20) (Gregeagle20)
Registered Member
Username: Gregeagle20
Post Number: 255
Registered: 4-2002
Posted From: 66.18.167.76
Rating: N/A
Votes: 0 (Vote!) | | Posted on Tuesday, April 28, 2009 - 10:37 pm: | |
By the way, was reminded on the other board that I should include the current turbo numbers and that is Garrett A/R 75 M24 |
George M. Todd (George_mc6)
Registered Member
Username: George_mc6
Post Number: 809
Registered: 8-2006
Posted From: 64.55.111.6
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, April 29, 2009 - 12:08 am: | |
Greg,
You can probably answer your own question by looking in the mirror. Under full throttle, after two or three seconds to let the turbo catch up, and in the 1600-2000 RPM range, any appreciable amount of black smoke?
If no smoke, you're fine, a lot of continuous black smoke means you need more air.
HTH,
G |
Greg Roberts (Eagle 20) (Gregeagle20)
Registered Member
Username: Gregeagle20
Post Number: 256
Registered: 4-2002
Posted From: 66.18.167.76
Rating: N/A
Votes: 0 (Vote!) | | Posted on Wednesday, April 29, 2009 - 4:10 pm: | |
George, Would your answer be the same for a DDEC and a mechanical engine? I was under the assumption that the DDEC engine would adjust fuel delivery based on turbo pressure but I may be wrong. |
George M. Todd (George_mc6)
Registered Member
Username: George_mc6
Post Number: 810
Registered: 8-2006
Posted From: 64.55.111.6
Rating: N/A
Votes: 0 (Vote!) | | Posted on Thursday, April 30, 2009 - 2:29 pm: | |
Greg,
To assume is...
But no, you are right, fuel delivery rate is a function of intake manifold pressure.
The only thing is that as long as the brain sees close to what it needs, it will allow more fuel than the engine can burn efficiently.
Does that make sense?
G |
larry currier (Larryc)
Registered Member
Username: Larryc
Post Number: 212
Registered: 2-2007
Posted From: 205.188.116.203
Rating: N/A
Votes: 0 (Vote!) | | Posted on Friday, May 01, 2009 - 3:49 pm: | |
Greg, the turbo stays the same all the way to the 450HP setting, only the airbox gets changed on the 450 download. If you want a 450, take it to Courtwright Diesel in Tacoma, they offered me that download, but said it might run hot if I didn't change out the airbox. Don't forget to get the max droop set. If you push the big settings, keep an eye on the exhaust manifold gaskets and pipes, they need to be in good shape or they will fail. The DDEC mainly takes fuel away from the engine if the boost is to low. I notice mine when leaving a stop, before the turbo can spool up. The rest of the time, they are starving for fuel in my opinion. |
Greg Roberts (Eagle 20) (Gregeagle20)
Registered Member
Username: Gregeagle20
Post Number: 257
Registered: 4-2002
Posted From: 66.18.167.76
Rating: N/A
Votes: 0 (Vote!) | | Posted on Saturday, May 02, 2009 - 1:56 am: | |
Thanks Larry. Sounds like I am good to go with the Turbo then. I need to get a pressure gauge installed so I can actually see the boost and see if it is appropriate for the particular load. Thanks guys! |