Unexpected Dyno Results

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Unexpected Dyno Results

Postby Underpsi » Sat Nov 03, 2007 4:47 pm

Truck sits exactly as signature states and I never didn't anything else to it. My best run was 343hp and 879 torque. I was expecting something like 225-250hp and around 600 torque. I think my numbers are pretty impressive for a stock turbo with a 16cm and injectors almost the same as stock.
Heres the graph
http://s25.photobucket.com/albums/c75/b ... t=Dyno.jpg
Last edited by Underpsi on Sun Nov 04, 2007 7:35 pm, edited 1 time in total.
1989 D250 5spd w/SB3250DD, .020 over head gasket, O-rings, Extensive port/polish, ARP head studs, 62/71/14, 6x.018 sticks. First Dyno stock turbo and pods: 343/879
2nd with 62 & big sticks: 393/813
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Underpsi
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Postby KTA » Sat Nov 03, 2007 8:51 pm

On the stock 89 turbo and no ic or water or water meth or any kind of intake cooling?? Either your head job really paid off or the dyno had a pretty hefty SAE correction factor on it. I would have expected around 280-300 max especially with no gov spring.
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Postby Underpsi » Sat Nov 03, 2007 10:33 pm

Actually I do have the 3200 spring guess I don't have it in my sig though and the only other thing I have is a 1/2 line from the lift pump to the IP and its a high psi piston pump. No cooling of any kind. The head was done quite extensively and my egts aren't even close to as high as they were before but I didn't think even the best head job would make a big difference over stock. The correction factor was set to standard
1989 D250 5spd w/SB3250DD, .020 over head gasket, O-rings, Extensive port/polish, ARP head studs, 62/71/14, 6x.018 sticks. First Dyno stock turbo and pods: 343/879
2nd with 62 & big sticks: 393/813
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Underpsi
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Postby TWorline » Sun Nov 04, 2007 5:33 am

Those are some very good numbers! There is some serious HP hiding in our heads for sure. :grin: Just curious, what kind of boost/pyro numbers do you see?
Tim Worline
1992 W250 Club Cab LE, S300 62/71, 5" stainless intake, 4" into 5" exhaust, ATS exhaust manifold, SDX 5X18 Injectors, AirDog 150, Borgeson shaft, Coolingmist Vari-cool, Con OFEK, 3" Stainless CoolerTubz, 354/749.

http://www.CoolerTubz.com/
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Postby wannadiesel » Sun Nov 04, 2007 7:35 am

Those are awesome numbers! What kind of dyno was it?

I know POD's and no AFC lever can put an awful lot of fuel through the motor. :twisted:
'93 D350 LE Club Cab dually, Getrag, 3.54 Pow-R-Lok with: DPS EDM's, HTT Stage IV/14wg, Con-FE, Snow Stage 2 water/meth, custom fuel pin, Walbro secondary fuel system.

Best dyno: 408/844
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Postby Underpsi » Sun Nov 04, 2007 8:22 am

Thanks, Not sure what the actual type was... first time on the dyno for me, its made by DYNOmite and its an inground one. im gonna call tommorrow and ask. Should have the dyno sheet posted little later today
1989 D250 5spd w/SB3250DD, .020 over head gasket, O-rings, Extensive port/polish, ARP head studs, 62/71/14, 6x.018 sticks. First Dyno stock turbo and pods: 343/879
2nd with 62 & big sticks: 393/813
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Underpsi
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Postby GLHS » Sun Nov 04, 2007 8:51 am

Your elevation is probably around 1000' or less correct? If this is true, your correction factor should not be much.
Yes, a properly ported head could help a bunch!
92 W250 ext cab, 5spd, SPS 62/71/14, ATS 3 piece, Banks 3G intake, Icebox CAI, DDP #4+, timing 1.95 mm, SB 4 puck FE, PDR fuel pin, Hellmann intercooler, Snow water/meth, 60# springs, stock long block, D80 3.54 w/disks, 455+/1005 uncorrected, 13.34@102 7-06; 472 fuel/520 water/meth uncorrected 5-08
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Postby Underpsi » Sun Nov 04, 2007 10:13 am

I only saw about 30lbs of boost on the dyno and 1250deg. On the street I can get over 35 and around 1500deg. Before the head I could get 40lbs and peg my 1500 gauge in seconds, even in third!
My elevation is less then 1000ft. The shop I had do my head seemed to do pretty good workd and I got a good deal too!
1989 D250 5spd w/SB3250DD, .020 over head gasket, O-rings, Extensive port/polish, ARP head studs, 62/71/14, 6x.018 sticks. First Dyno stock turbo and pods: 343/879
2nd with 62 & big sticks: 393/813
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Underpsi
fuel screw!!!!
 
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Postby PToombs » Sun Nov 04, 2007 11:42 am

I'm surprised at the torque! My HP was higher, but the torque lower. It's interesting the different readings you get with different mods that are close. 8)
pete

Just enough power to break everything behind the crankshaft.
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Postby Underpsi » Sun Nov 04, 2007 7:37 pm

PToombs wrote:I'm surprised at the torque! My HP was higher, but the torque lower. It's interesting the different readings you get with different mods that are close. 8)

What all do you have done to your truck? Is your head ported?

Posted the graph up top
1989 D250 5spd w/SB3250DD, .020 over head gasket, O-rings, Extensive port/polish, ARP head studs, 62/71/14, 6x.018 sticks. First Dyno stock turbo and pods: 343/879
2nd with 62 & big sticks: 393/813
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Underpsi
fuel screw!!!!
 
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Location: Ont, Can
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Postby bgilbert » Sun Nov 04, 2007 7:41 pm

Something wasn't right or lack of something, fueled only to 2700rpm. Was there anymore left past 2700rpm or did they let off?
Bill Gilbert
85 D350 crew with 90 6BT intercooled Getrag 3.07's
93 D350 single cab Getrag 3.54's.
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Postby Underpsi » Sun Nov 04, 2007 9:15 pm

I drove on the dyno, I just let off when they told me too
1989 D250 5spd w/SB3250DD, .020 over head gasket, O-rings, Extensive port/polish, ARP head studs, 62/71/14, 6x.018 sticks. First Dyno stock turbo and pods: 343/879
2nd with 62 & big sticks: 393/813
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Underpsi
fuel screw!!!!
 
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Joined: Fri Feb 02, 2007 9:48 pm
Location: Ont, Can
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Postby KTA » Mon Nov 05, 2007 8:36 am

Standard is a higher correction than SAE. I often times see standard corrections of 6-8% when SAE will be 4%. It would be interesting to know what the actual correction value was that day, usually it is on the dyno sheet, but not on that one. I always insist that all of my sheets are done with the correction factor set to NONE. I know that isn't as good for comparison because it usually hurts the numbers, but that is how much power it actually made that day at that place and that is what I am interested in, not what it might make under ideal conditions. 8)
Fleet of Junk: 1989 D350 627rwhp 1300 tq B-1/Hx60 twins, KTA pump/injectors, ported head, BIG fuel supply. 13.75@ 109.5mph 1/4: 1992 W350 Cab-chasis, 1993 W350 ext cab cust.370 inj Hx40/16cm 290rwhp hydroboost brakes,1984 D350 crew-cab another project.
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Postby Underpsi » Mon Nov 05, 2007 11:30 am

I could always call and ask what they have it set at, im sure its still set the same

**Edit: I just called and confirmed the dyno is set a 0% correction. He said thats the only way they run it so they get true RWHP readings. Also I asked about the graph and how the rpm drops off like that. Its just the program makes the graph like that where ever the peak power is. It doesn't actually defuel then just looks like that so its neater**
1989 D250 5spd w/SB3250DD, .020 over head gasket, O-rings, Extensive port/polish, ARP head studs, 62/71/14, 6x.018 sticks. First Dyno stock turbo and pods: 343/879
2nd with 62 & big sticks: 393/813
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Underpsi
fuel screw!!!!
 
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Joined: Fri Feb 02, 2007 9:48 pm
Location: Ont, Can
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Postby cummins king » Mon Nov 05, 2007 4:09 pm

hey kevien
i wonder if it was because they dont have an rpm gage for diesel
93 4X4 auto
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