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Nathan, if I remember correctly, you have a friend with a dyno? You probably have had some time on it to get your tune the way it is. I'm not saying the Hot cam isn't good, but I still don't know if I will say that it is better. Would you share your torque figures with us?
I believe that there are alot of camaro guys running that cam. Those guys are very experimental. You can find info (good or bad) on some of those boards if you do not find what you need here!
266 at .550 and 269 at .600 IS a stall in flow. If its not making any significant gains at the next higher lift, thats where it stalls.
As far as this cam goes I'd like to see if anyone has had any luck with the GM 846 cam which is very similar to the 224/230
You've got a far different terminology. A stall is when your airflow greatly decreases. If it levels off or drops very slightly you can easily still make good horsepower by going with higher lift. Some heads actually flow like 100 CFM less when you reach a certain point, THAT is a stall.
I don't have my absolute latest dyno graph where I slipped up and got 358 torque and 382 hp, but here's my previous one which is darn close.
If you compare this to LT4 Bud's cam you'll notice the same basic shape but a lot more mid range torque. Now granted, like you say, his tune isn't quite right, there is still some power to be had there. My point is though that if you can get the same power numbers out of a smaller duration cam you'd be well advised to do it and you'll have better driveability.
That graph sure is purrdy! If you say that your numbers are legit, I'll buy it, but that is the best running 350 Hot cam that I'm aware of. Maybe your heads just kick azz or you have one of those "freaks". If that is on pump gas with no "tricks", then pat yourself on the back. Bet that is a a fun car to drive!!!!
Nathan, it is amazing just how close our torque and horsepower curves follow each other except yours is of course higher. What you say about midrange is true, but more significant is that you just make more torque right across the board. What I am saying is your drop in torque and midrange is pretty darn close to mine except your values are all above mine.
I was looking at your A/F curves at notice that the green one seems quite different from the other two. Notice how on mine the three varied especially between 6000-6500 rpm. I am trying to understand what goes on when A/F curves don't repeat????
You sure do have a real killer engine there. To be honest tho, I don't understand why my cam doesn't make at least more peak power than yours? The 503 and hotcam don't seem to be that different.
I am thinking your long tube headers really make a big difference over my stock exhaust manifold??? Also looks like you have eliminated your cats???
Seems like your higher hp is coming from your exhaust and some killer tuning on the dyno rather than from the cam..
Again you have definately got one rocking setup!!!!!!
Looked at the dyno sheets from my 350 with the ZZ9 cam and same options as Nathans with the hot cam. Pretty close. The ZZ9 has better torque down low,3200 RPM's, 10HP less Peak and drops off more above 6000 RPM's. Ran 11.9's at 115-117 MPH with this cam. TPIS heads 254 CFM at 550.
LT4BUD, I guess I don't know your full combo. If you don't really have exhaust, then your HP figures are pretty DAMM good. There is some power there and if you get the A/F ratio smoothed out, you WILL find it. Good luck, hope I get to the dyno soon so that I can make you all feel better about your combo. hehe
Nathan, will you share your timing events with me? The combo is different, but not that different. Just looking for some reassurance that mine is close.
Cat back I have 3", B&B resonator, H-pipe right after resonator and no mufflers. I have factory manifold and cats, did some port matching on the manifold at the heads.
On the intake side I have the SLP triple snorkle.
What would long tubes and either no or better cats get me??? Not sure which intake would be better??
My point is that all things being equal, the longer duration, higher lift CompCams 503 has to make at least more PEAK torque & hp than the hotcam. Also based on my dyno it is not a real peaky kind of cam.
Nathan clearly has put together a great PACKAGE!!!!
I finally got my car on the dyno so I thought I'd dig up this post if anybody is interested. I'm using the 224/230 cam in a 383, and the results are from a Mustang dyno, not a Dynojet. I saw 390 rwhp @ 5600, and 390 ft lb @ 4100. I was happy with the results. 50 hp more than a stock Z06 that just ran on the same dyno.