How about the 212? I am still trying to give Edouard a little thrill along with good economy. TA describes it as:
"Excellent performance cam. Gives 25 HP increase over stock cam. Substantial improvement without hurting fuel economy. Stock valve train, converter and gears ok. Good idle. 9.0:1 or more CR."
Ok bobc455...you can say "I told you so"
The RPM range is 100 RPM higher at both ends - so shouldn't be any worse for towing.Excellent performance cam. Gives 25 HP increase over stock cam. Slightly more torque than TA 212. Substantial improvement without hurting fuel economy. Stock valve train, converter, and gears ok. Good idle. 9.0:1 or more CR
I cant’ speak for the Doctor but I suspect he was focusing on camshafts that had 112 degree lobe separation and no valve overlap @ .050 lobe lift.Pulling out my now well-used TA Performance catalog, I cannot help but wonder about another "in between" cam: TA 284-88H. I scurried to see if this one had been considered on either run of Dyno2003, but I didn't see it (did I miss it?) According to the TA Performance description it seems mild enough for my needs, but a smidge more aggressive: The RPM range is 100 RPM higher at both ends - so shouldn't be any worse for towing.
I've tried to follow Paul's assessment for the TA 212 to see if I could stop any obvious "won't fly" for the TA 284-88H. However, I can't quite pull that off. So I humbly ask Paul and the good doctor for one last comparison. What do folks think about this last possible nudge toward a more aggressive cam?
Thanks also for making this correction from my reply. I edited my reply to prevent confusion.The dynamic compression ratio calculators use advertised duration to determine the intake closing point. This is when the valve is all the way closed and true compression begins. Though these cams have similar intake closing points at .050", they have about 8* difference in advertised duration intake closing points.
Now we have the 212 vs. 284-88H. I am about out of space on SVT Performance and my normal file server is having upload problems. I hope one of these is it!
I found a free Dyno2003 download several years ago. I don't remember where. It is fun to dust it off every so often to keep me in practice. I updated the cam profiles in both simulations by providing more information and letting the calculator select the lifter acceleration rate. This should help the simulations be more accurate. I think they have to be since we may be down to the final choices.
I've saved all these graphs and will give them a careful scrutiny before finalizing my cam choice. If you need the storage space, I suppose you can delete them, but I'm sure the community would appreciate keeping them around. All I can do is thank you for that!
Many, many thanks!! :finish: This project is going more slowly than I hoped, but a little extra time is well worth it to avoid choices I would regret later!
Cheers, Edouard :beers:
Intake Closing using advertised duration. 64.5 degrees
. . . . This means your intake closing point at .050" will be 37* and your advertised intake closing point will be 60.5*. I would re-calculate your dynamic compression ratio figures with the correct advertised intake closing point.
Here is another good on-line DCR calculator that uses the advertised intake closing point: http://www.wallaceracing.com/dynamic-cr.php. It is less confusing and more accurate since it doesn't try to use @ 0.050" intake closing events and a formula to provide an advertised intake closing point.
Thanks for you help in correcting these numbers. I did make a college-try to find a good tutorial on how to compute these values from the cam specs but I came up empty.
I dunno about this calculator . . . . is says something about "Boost Pressure in PSI". Does that mean I have'ta use a supercharger in order to use it! :bgrin:
Seriously, thanks for the reference. I had stumbled across it yesterday, but hadn't tried it. Not that I'll be taking advantage of all of the parameters it provides!
Here is a good calculator for cam events:http://www.wallaceracing.com/cam-deg-calc.php. . . . .
You would just use 0 for boost and elevation. I have two turbocharged and one supercharged vehicles. So, the calculator is a bonus for me. Boosted vehicles make the impossible possible (great mileage and unbelievable power). Having had one, I now want a power adder on everything. Maybe we can get you to try ......................... That cam would not be bad for ............... Hmmm..................
Don't tempt me!!! :rod:
Seriously, I have at least daydreamed a little about it. However, I'm making so many changes to this car - I've gotta stop somewhere! However, if indeed that cam would work with a power-adder of some sort . . . . perhaps someday!
You just have to imagine your partner beside you, a few kids in the back and your trailer behind this:
After a careful review of the video . . . . . *GULP*!!
So how do you make sure you haven't torn off the trailer hitch and left the trailer a few miles back? :bgrin: