TRN4L

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

gkull

that link does not work for me

TRN4L

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

billla

Not sure exactly what you're asking for. I would agree that those results look VERY optimistic to me...

TRN4L

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

billla

I'll run a sim this evening with my DDA and post for comparison.

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.

gkull

To make DD2000 more accurate you have to plug in a custom head flow chart giving CFM flows at .050 lift increments. you have to plug in the cam event numbers from the cam card. you have to put the exhaust with mufflers

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

TRN4L

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.

gkull

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

billla

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

TRN4L

Amazing! Thanks for your help and info. I'm still impressed by the numbers. I'm happy with 250 at the wheels! Especially with my shoestring budget!

billla

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...