NMB2 build update
Fleet Owner
Joined: Jul 2006
Posts: 20,322
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From: Mi'kma'ki
don't try that at home.
no it's sure not.he didn't say,but im sure he was talking about 6 degree's BTDC.or like you say +6.the normal idi would be sluggish here.
but as you increase pressure into the cylinders,the more you need to retard the timing.stock is 8.5 BTDC.it's not surprising to see his ideal timing retarded a couple degree's giving the high boost he's running.
but as you increase pressure into the cylinders,the more you need to retard the timing.stock is 8.5 BTDC.it's not surprising to see his ideal timing retarded a couple degree's giving the high boost he's running.
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
it also has alot to do with my camshaft. The more efficient you become, the more retarded you can run the timing. It injects the diesel closer to TDC, running 8.5* like the stock setting causes my engine to burn the diesel too soon.
Senior User
Joined: May 2010
Posts: 288
Likes: 0
From: Oregon
Congrats on the near 300 rwhp!
Is 29% PL normal for a zf5? Sounds high to me but I haven't ever looked into that on our trucks
. Also unless I'm doing the math wrong wouldn't crank power be 411hp/964ftlb with 292rwhp/614ftlb and 29% loss? Good luck on the pump situation too... Maybe Ken dropped the flow to protect the shaft?
Either way thats some kick@$$ numbers you laid down
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Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
@NMB2
Congrats on the near 300 rwhp!
Is 29% PL normal for a zf5? Sounds high to me but I haven't ever looked into that on our trucks. Also unless I'm doing the math wrong wouldn't crank power be 411hp/964ftlb with 292rwhp/614ftlb and 29% loss?
Good luck on the pump situation too... Maybe Ken dropped the flow to protect the shaft?
Either way thats some kick@$$ numbers you laid down
Congrats on the near 300 rwhp!
Is 29% PL normal for a zf5? Sounds high to me but I haven't ever looked into that on our trucks
. Also unless I'm doing the math wrong wouldn't crank power be 411hp/964ftlb with 292rwhp/614ftlb and 29% loss? Good luck on the pump situation too... Maybe Ken dropped the flow to protect the shaft?
Either way thats some kick@$$ numbers you laid down
292 x 1.29 = 376.68
614 x 1.29 = 792.06
Elder User
Joined: Dec 2011
Posts: 751
Likes: 0
From: Kodiak, Alaska
Got cha'. What do you do to the cam when you grind it to make it more efficient?
Methanoholic
Joined: Mar 2009
Posts: 6,442
Likes: 8
From: Maine (NorCal Native)
Nice job Justin ... You've inspired, that in itself is a success!
Ya, I'm disappointed, Like you, I would of liked and expected to see higher numbers, but it is what it is.
Great job.
Looks like it could still use more fuel ... Sure would like to see that pump on another stand to get verification of the fuel delivery per.
-Enjoy
fh : )_~
Ya, I'm disappointed, Like you, I would of liked and expected to see higher numbers, but it is what it is.
Great job.
Looks like it could still use more fuel ... Sure would like to see that pump on another stand to get verification of the fuel delivery per.
-Enjoy
fh : )_~
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
Nice job Justin ... You've inspired, that in itself is a success!
Ya, I'm disappointed, Like you, I would of liked and expected to see higher numbers, but it is what it is.
Great job.
Looks like it could still use more fuel ... Sure would like to see that pump on another stand to get verification of the fuel delivery per.
-Enjoy
fh : )_~
Ya, I'm disappointed, Like you, I would of liked and expected to see higher numbers, but it is what it is.
Great job.
Looks like it could still use more fuel ... Sure would like to see that pump on another stand to get verification of the fuel delivery per.
-Enjoy
fh : )_~
I made 207hp/477tq over a stock 6.9 IDI.... thinking of it that way puts it into a different perspective. For me at least... I'm pretty happy with where it is at.
I am going to take this opportunity of Racin' needing a new IP, to do a free upgrade on mine that may cost me $1500 down the road.
Next time I dyno.... I should have a bigger IP, new rear end gears, some more miles.... and Ill slap it with some real methanol!
Thread Starter
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Postmaster
Joined: Nov 2008
Posts: 2,851
Likes: 3
From: Buckley, WA
Yes! New pump should be sweet. If it were me tho, I'd keep it as is! Those numbers are very respectable for an old 80's diesel motor!
and like you said man, ur not building a race car or a sled puller...for a daily driver / reliable tow rig I'd say you hit the nail on the head! Nice job with it!
But...knowing you...I know you want to get what can out of it
and like you said man, ur not building a race car or a sled puller...for a daily driver / reliable tow rig I'd say you hit the nail on the head! Nice job with it!But...knowing you...I know you want to get what can out of it
Elder User
Joined: Feb 2012
Posts: 888
Likes: 2
I'm not quite sure why it shows MPH on bottom instead of the RPM. I can call them tomorrow and see if they can send me a copy with RPM on bottom. I seen her clicking through the options but it didn't cross my mind at first what she was doing.
Anywho. the first pull started @ 1800, and I just matted it to the floor
The last 2 started @ 1500, I rolled into it till 1800 then matted it. Seemed to be smoother/make more power that way.
If you refer back to one of the dyno vids that shows the dyno screen during run, I think the cut off was around 3300
60mph is 2250, 65 is 2400, 70 is just over 2500 when I cruise.
Anywho. the first pull started @ 1800, and I just matted it to the floor
The last 2 started @ 1500, I rolled into it till 1800 then matted it. Seemed to be smoother/make more power that way.
If you refer back to one of the dyno vids that shows the dyno screen during run, I think the cut off was around 3300
60mph is 2250, 65 is 2400, 70 is just over 2500 when I cruise.