Please help with understanding dyno simulation results.
Thread Starter
Intermediate
Joined: May 2011
Posts: 30
Likes: 0
From: Detroit Michigan
Please help with understanding dyno simulation results.
I'm currently rebuilding an L05 to go into my C3 project. I was curious to estimate what type of power I would make. I entered as much info as I could into DD2000 and this is what I got:
http://www.pdfhost.net/index.php?Act...c87e7af2fb6d28
-193 SP heads
-Edelbrock performer
-600cfm Edelbrock carb
-Unknown Long tube headers (were on a C2 vette)
-Summit K1102 cam
-Holley Red electric fuel pump
This is my first performance build. I am a novice! Im asking for help interpreting the resullts. From what I've read about the 193 Heads I think these results were more than I had expected from my work (if I'm reading the results correctly) Thanks
-Anthony
http://www.pdfhost.net/index.php?Act...c87e7af2fb6d28
-193 SP heads
-Edelbrock performer
-600cfm Edelbrock carb
-Unknown Long tube headers (were on a C2 vette)
-Summit K1102 cam
-Holley Red electric fuel pump
This is my first performance build. I am a novice! Im asking for help interpreting the resullts. From what I've read about the 193 Heads I think these results were more than I had expected from my work (if I'm reading the results correctly) Thanks
-Anthony
Thread Starter
Intermediate
Joined: May 2011
Posts: 30
Likes: 0
From: Detroit Michigan
I just tested it. It worked for me. the link on the page is just small. it says vette.pdf
Uploaded it elsewhere in-case: http://www.filehosting.org/file/deta...0756/vette.pdf
Uploaded it elsewhere in-case: http://www.filehosting.org/file/deta...0756/vette.pdf
Thread Starter
Intermediate
Joined: May 2011
Posts: 30
Likes: 0
From: Detroit Michigan
Me too, but I've been told DD2K is pretty acurate for a sim. Maybe I did something wrong in the setup or something. What would you consider to be a more realistic estimate? Also is there any advice anyone can offer based on my setup/results to get more out of this setup? I'm gathering materials for an LS swap this winter so I really don't wanna swap heads. Thanks for the help
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Me too, but I've been told DD2K is pretty acurate for a sim. Maybe I did something wrong in the setup or something. What would you consider to be a more realistic estimate? Also is there any advice anyone can offer based on my setup/results to get more out of this setup? I'm gathering materials for an LS swap this winter so I really don't wanna swap heads. Thanks for the help
The biggest impact on these things are realistic models - if the flow, cam lobe shape, etc. are goofy...then so are the results. DD in general is about 5% optimistic on torque.
Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
Me too, but I've been told DD2K is pretty acurate for a sim. Maybe I did something wrong in the setup or something. What would you consider to be a more realistic estimate? Also is there any advice anyone can offer based on my setup/results to get more out of this setup? I'm gathering materials for an LS swap this winter so I really don't wanna swap heads. Thanks for the help
I still can't see your chart but what are the peak numbers? But from a review of your parts you might make 270 hp at 4000 rpm. That cam is very wimpy. It said that it is for tow vehicles with low compression
Thread Starter
Intermediate
Joined: May 2011
Posts: 30
Likes: 0
From: Detroit Michigan
It says id make 287/376 @ 4000. The peak numbers were 321hp/337tq @ 5000. And 254hp/381tq @ 3500. I entered the head flow data in .100 incriments after the initial .050 entry. I entered the correct cam info I also did exhaust with mufflers.
Last edited by TRN4L; Apr 12, 2012 at 03:48 PM.
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Team Owner
Joined: Apr 1999
Posts: 21,953
Likes: 1,445
From: Reno Nevada
2024 C3 of the Year Finalist- Modified
I don't believe that cam is big enough to get peak hp at 5000 rpm. I would have it peaking nearer to 4000 - 4200
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
OK, had a chance to look at this today, a couple of thoughts on your model then my run.
Large tube headers - I don't think so
That model is really for racing/dyno headers...not street headers.
The manifold modeling on DD2000 vs. later versions is overly-optimistic and "dual plane" tends to act more like a low-rise, single-plane like the Torker, which skews both total power and the power curve.
I had very different numbers for the cam from the cam card.
Your cylinder head model was incomplete And...I wasn't able to find better flow numbers than "Dyno Don's"...and I frankly don't have high confidence in those numbers comparatively. But I used them to build a model for the head.
So...here's what I saw in DynoSim5. Note that all the DD's are optimistic on torque by about 5%. Not all that different, other than the peak numbers. Again, I suspect the 193 flow numbers are rounded UP and are very optimistic.
My observation is that the cam is fairly well-matched to the heads...which suck There would also be more power in a more modern cam profile...but likely not much. Turning out an honest 250HP to the rear wheels isn't bad for a budget build.
My $.02
Large tube headers - I don't think so
That model is really for racing/dyno headers...not street headers. The manifold modeling on DD2000 vs. later versions is overly-optimistic and "dual plane" tends to act more like a low-rise, single-plane like the Torker, which skews both total power and the power curve.
I had very different numbers for the cam from the cam card.
Your cylinder head model was incomplete
And...I wasn't able to find better flow numbers than "Dyno Don's"...and I frankly don't have high confidence in those numbers comparatively. But I used them to build a model for the head.So...here's what I saw in DynoSim5. Note that all the DD's are optimistic on torque by about 5%. Not all that different, other than the peak numbers. Again, I suspect the 193 flow numbers are rounded UP and are very optimistic.
My observation is that the cam is fairly well-matched to the heads...which suck
There would also be more power in a more modern cam profile...but likely not much. Turning out an honest 250HP to the rear wheels isn't bad for a budget build. My $.02
Last edited by billla; Apr 14, 2012 at 09:44 AM.
Le Mans Master
Joined: Jun 2004
Posts: 6,231
Likes: 65
From: Seattle WA
St. Jude Donor '14
Most welcome - like I said, I would take that number with a BIG grain of salt, since the flow numbers seem VERY optimistic to me...
