DD2k Solution

[Dominic]

Last night I ran desktop dyno through 223,420 possible iterations (possibilities) of lobe center, intake lift, exhaust lift, intake duration, and exhaust duration.

Here are the best cam specs I could find, it took 6.8hours of processing to find these. Keep in mind the horsepower numbers I will provide are for desktop dyno comparison only no matter how similar they might be to the real world numbers. The actual horsepower increase/decrease though I feel is significant [img]smile.gif[/img] .

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~
Stock Cam:
Max Power = 208 @ 5200RPM
Max Torque = 260 @ 3500RPM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~
CompCams Cam:
Max Power = 260 @ 6000RPM
Max Torque = 261 @ 4000RPM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~
Supersix Cam:
Max Power = 266 @ 5500RPM
Max Torque = 259 @ 4000RPM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~
Modified CompCams Cam (Int Lift = 0.430, Exh Lift = 0.590):
Max Power = 268 @ 6000RPM
Max Torque = 263 @ 4500RPM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~
Custom Cam 1:
Lobe Center = 114°
Intake Duration = 212°
Exhaust Duration = 223°
Intake Lift @ Valve = 0.430"
Exhaust Lift @ Valve = 0.550"
Max Power = 270 @ 6000RPM
Max Torque = 265 @ 4500RPM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~
Custom Cam 2:
Lobe Center = 113°
Intake Duration = 214°
Exhaust Duration = 223°
Intake Lift @ Valve = 0.420"
Exhaust Lift @ Valve = 0.600"
Max Power = 273 @ 6000RPM
Max Torque = 263 @ 4500RPM
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ ~~~~~~~~~~

The compcams cam aint bad, neither is the supersix. The iterations I did dealt with maximum horsepower to 6,000, and thats why I'm posting the max hp at 6K. These were all done with a 750cfm induction flow throttle body (basically what ours is good for according to my TB flow chart), HP Manifolds instead of headers, and stock valve sizes.

I'll leave it up to you guys to find the cam you want, I'm sure those custom cams would idle like hell since the durations are so far apart lol [img]smile.gif[/img] [img]graemlins/burnout.gif[/img]

I'm looking for comments on these cam designs, any suggestions? [img]smile.gif[/img]

------------------------------------------------

Here is a graph of the power curve differences between stock, supersix (ssm), compcams (modified), and then the custom cam #2 I designed last night. All specs are located above [img]smile.gif[/img]

[Click here to view the graph since I cannot post photos in this forum]

[ June 25, 2002: Message edited by: Dominic ]</p>

[Arctc Wolf]

Try it w/ slightly bigger valves. Since there are .020 overbore pistons being made for our cars now, maybe we can squeeze bigger vlaves in there. also, try it w/ less compression, 8.0:1. are those rwhp and rwtq numbers, or flywheel numbers?

[Dominic]

Those are flywheel horsepower numbers. Use them as realistic if you want, I just use them for comparison between cams. I have the charts and power/efficiency tables too but that gives you an idea of the power increases it predicts.

Everytime you change pistons/rebuild its a good idea to rehone the cyl walls to get good seating. Usually you want to bore 0.10 everytime for proper sealing. A slightly larger piston bore will not allow you to work with larger valves.

Changing valve size will slightly affect power, but those points I listed make all the major adjustments in power (the combinations of valve lift and duration).

[Dominic]

Please look at the new graph I added above [img]smile.gif[/img]

[ June 25, 2002: Message edited by: Dominic ]</p>

[Magnus]

I HIGHLY disagree.

DD2K Puts such a HUGE favor on exhaust when we don't need it. Our heads flow very well stock. Thats why we can pick up so much from nitrous. DD2K puts a huge favor on exhaust to make the power.. that favor is not needed..

And look how low the lift is on the intake.. PLEASE!

My intake lobe is the EXACT same as my exhaust lobe. [img]smile.gif[/img]

Try to trick DD2K into thinking that we have better flowing exhaust.. see how the #'s change. Those #'s there would make sense if our ehxaust ports flowed like crap (which they don't).

[Dominic]

Oh, I'll keep that in mind. I wasn't sure how accurate DD2k was. I just thought it was pretty accurate since the powercurve came out almost perfect when everything was entered in properly [img]smile.gif[/img]

However, you make far more than 270hp Magnus.

[ June 25, 2002: Message edited by: Dominic ]</p>

[pgriffith]

Edited by Magnus.. note my reply below.. This stuff does not belong here.

[ June 26, 2002: Message edited by: Magnus ]</p>

[Magnus]

This is not a warez forum.

We do not promote/support piracy.

[pgriffith]

<blockquote>quote:</font><hr>Originally posted by Magnus:
This is not a warez forum.

We do not promote/support piracy.<hr></blockquote>

Nobody was ever asking for pirated versions of software. I was under the impression it was a shareware program or maybe a demo he was using. Sorry.

[Magnus]

No harm done, I was just doin my job. It's all good.