Dynocom dyno
Car in sig. Ran stock intake tube instead of the CAI. Not sure if that hurt me. The tune is my personal Tunercat tune. I never have had a wideband/pro tune.

Heads are LE. Not sure if stage 2 or 3. I bought them before he was "staging" them. They do have larger valves though. Springs are cc987. Car has 74k miles on stock short block.

My question is: does this cam run out of power at 5800rpm? I was thinking about changing it out. I am looking for 25 more hp. Possible?

 

This cam is known for low dyno numbers. It has been seen more than once. As many have said... the dyno is only a measuring tool and shouldn't be used to judge ultimate performance. Take it to the track before you decide to change it.

 

Those numbers look pretty good to me. Great torque curve!! You could probably get at least a couple hundred more rpm with the CAI. What did your A/F ratio look lke?

 

1.65 rockers and cc987 springs is something I would take a hard look at. That dyno has smoothing enabled like I have never seen before looks like somebody drew the graph with a ruler and put a radius on the corners. If the valve train was setup a little better you should be able to peak hp at 6200. Stock intake tube can be a very big restriction even on a stock engine, you move alot more air than a stock engine... so its much worse.

 

On good ported heads a CC503 should make power over 6K RPM. Most shift around 6.2K - 6.4K RPM or so. My 224/230 cam is shifting at 6.3K
http://i140.photobucket.com/albums/r...972/GRAPH2.jpg

Something is wrong with where you power is peaking IMHO.

 

If I'm reading that right and it says 385ish rwhp with that flat of a torque curve looks pretty good to me for a heads/cam 350 cubed motor with a street cam such as the cc503. Also folks have gotten great nitrous times out of this cam as well as great track times. So yes take it to the track. Power under the curve and low rpm torque is where this cam shines and that's what gives you good track numbers.

If you do have better results with a different set of springs let me know. I'll be installing a cc503 into my brother's 350 with ported heads and LE intake this summer and we are running the CC987 springs as well.

 

Thank you for taking the time to reply guys.
It says 365hp/360tq btw.

I looked at other peoples curves that same day. It was a dyno day. Noone had a tq curve like mine (a straight line across). Back when I had the heads ported none of the beehive or patroit springs were even made. The 987 was considered the best for my setup back then. About my 503 cam; I went with 1.65rr because of the low lift of that cam and my head showed they flowed great at higher lift. Never had a problem with them.

I am looking at changing the springs, cam, and RR's to get another 25hp. Maybe I should just call llyod up and see what he offers nowadays and if my goal is even reachable.

 

That looks about right. I made 371rwhp 6300 rpm, and the tq was a little smother not straight across, with my set up in sig.

 

I have read where the cc503 should not be used with ported heads some kinda bs. That it runs out but you my friend give me a at ease filling with those numbers.

 

My 1-2 shift is 6100. 2-3 5900 with the stock cam. My buddy ran the 503 on stock heads with a rev kit and shifted at 6600, it netted him many 11.9x slips.
But then again bolt-on cars have done better.

 

I didn't get a a/f ratio even though I had a bung for a wideband. It was a dyno day just to see what you made.

 

This is my take on your question. The cam is fine, it's the springs that are letting you down. If I where you, I would send the heads back to Lloyd for his latest port work (stage2) and a set of Patriot Golds. I can see you picking up that extra 25 hp your looking for with that done. Call Lloyd, as we have talked about that kind of gain with my heads, as they too were ported some years ago and he's mentioned some decent room for improvement.

 

 

There is something really wrong with this graph. HP is a function of torque. Which is why ALL dyno graphs TQ and HP cross @ 5250 RPM. Its a mathmatical equation. In this graph, the cuves cross @ 4600 / 4700. Take this car to another dyno and get another reading. If you shift the curves over to where the TQ and HP should cross, then the graph makes sense the the power levels look good and show a peak around 6400rpm.

 

Yup he is right. Good eye
Either that graph has been simply drawn to misrepresent, or the dyno numbers have been tweaked to misrepresent. Or the dyno itself is total stinky shat.

The two lines will ALWAYS cross at 5250 RPM unless your using the "NEW" math.