|
Please Help Me Pick a Cam for my 511"
#1578235
02/13/14 01:04 AM
02/13/14 01:04 AM
|
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
|
OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
|
I see things are a little slow so I'll throw this question out there. I am getting close to selecting a cam for my street/strip 511 for my Charger. Let's assume the car will weigh 3650 with driver race ready...or less. Trans will be a 4-speed and the rear gear will be a 3.73 or 4.10 ratio. Engine: 400 block, aluminum caps 4.25/2.220 crank 6.535 rods Diamong pistons with 4130 .990 pins ~10.8:1 static CR Edelbrock Victor Heads MW window CNC'd by Hughes Here is a link to the flow sheet: http://www.hughesengines.com/TechArticles/1headflowchartscomparisons.php#4658S31.7 ratio rocker arms Indy tunnel ram with HVH super suckers 1050 Quickfuel annular 1050's. TTI 2-1/8-2" stepped headers 3" exhaust with cross over and very, very low restriction mufflers I'm pretty sure I didn't miss anything. I am open to recommendations for cam specs, springs, retainers, pushrods, etc. I am also going to run a mechanical fuel pump if that makes a difference on the cam core. I was under the impression it does not. Thank you for taking a look!
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: Jeremiah]
#1578238
02/13/14 01:37 AM
02/13/14 01:37 AM
|
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
astjp2
master
|
master
Joined: Jan 2011
Posts: 4,785
Utah and Alaska
|
You can always ask Chase Knight from Crane cams. See how close they both come. Tim
1941 Taylorcraft
1968 Charger
1994 Wrangler
1998 Wrangler
2008 Kia Rio
2017 Jetta
I didn't do 4 years and 9 months of Graduate School to be called Mister!
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: Jeremiah]
#1578241
02/13/14 02:52 AM
02/13/14 02:52 AM
|
Joined: Jul 2004
Posts: 19,318
State of confusion
Thumperdart
I Live Here
|
I Live Here
Joined: Jul 2004
Posts: 19,318
State of confusion
|
Quote:
I am totally going to get a custom ground cam I was just seeing what the board had to say. The more questions I ask the more I learn.
I am going to use Isky RedZone endurance lifters, PAC springs, tool steel retainers with 10 degree locks. At least that is the tentative plan. Being a medium-budget build I am trying to focus on good pistons, heads, valvetrain gear and the unduction package. Hoping to have about 9k into this deal.
Not sure if this makes a difference but I am also using a CVR electric water pump.
Since you`re wisely goin through Isky, talk to Rod and tell him I sent ya and see what he says.............  What do want from this thing? Daily cruiser, dual purpose, where do the heads peak at,power brakes? What can you live with cos it matters............... 
Last edited by Thumperdart; 02/13/14 02:57 AM.
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: Jeremiah]
#1578242
02/13/14 02:58 AM
02/13/14 02:58 AM
|
Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
|
master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
|
I have a Comp HXL grind 264/264 @ 0.050, 112 LSA cam with 0.758"/0.758" lift using 1.7:1 rockers.
It is a pretty tame cam with good torque. I used it in my 500" stroked 400. I chose it thinking of using my 3,500 stall converter, and driving more on the street. I installed a spool and 5,000 stall converter, so I'm replacing the cam with a slightly larger one. PM me if your interested in it.
What rocker arms are you using?
I have 1.6:1 ratio T&D rockers with 0.725" intake offset, and I'm happy with them, but I think a 0.750" offset would help with pushod clearance.
I did have issues with breaking the center rocker stand on my set of Edelbrock MW Victor heads. I'm not sure if Edelbrock changed the design or heli-coil to fix the problem? I have an early set of the MW Victors, so I'm not sure if they changed them much. The heads as they came from Edelbrock were setup for valve springs with about 1.850" install height. I'm using PAC-1325 valve springs and Crower Ti +0.100" retainers, along with valve spring seats that fit the center of the springs and are about 0.060" thick. To get a 1.950" install spring height (about 275# on the seat), I still had to cut the cylinder valve seats a little bit. I have the engine apart to freshen it up and I tried to cut the valve seats a bit more. Found out that was bad as I broke into the roof of the intake port! I epoxyed it up and just using the 1.950" install height. If your really going to go crazy with over 0.750" lift and stiff springs with taller install heights, them start off by using longer valve, and mill the rocker stands off and use the Max Wedge style rocker shaft hold downs that are machined for the correct rocker arm geometry with the longer valves.
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: Jeremiah]
#1578244
02/13/14 03:51 AM
02/13/14 03:51 AM
|
Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
master
|
master
Joined: Jun 2006
Posts: 5,163
CT
|
As much as you and your short block can handle RPM wise, that engine should respond to damn near anything. I would say to go with a roller if you can afford it. Absolutely go custom grind. Any fill on that block?
What were you trying to make power-wise, 650-700?
Last edited by GTX MATT; 02/13/14 03:53 AM.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: GTX MATT]
#1578245
02/13/14 12:17 PM
02/13/14 12:17 PM
|
Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
Streetwize
master
|
master
Joined: Jan 2003
Posts: 9,876
Weddington, N.C.
|
Short block and head flow numbers are close to my 517 low deck with the Max wedge Chapmans. Big induction and the 4 speed, I'm assuming since you went with a moderate 10.8:1 CR and rear gearing you want to keep this a dual purpose car and drive it some on the street? What size and compound tire? PM me if you want, we can compare notes but I've got a pretty good idea what works well...the question will be....can you hook it up? I would shoot for a target HP and trap RPM and then try to build as much torque as you can throughout that powerband and take full advantage of the smaller RPM drops between gears. IMO, the target HP is critical and that depends on how bad and how often you want to beat on the motor and that's why I need more info. Might want to PM 70blackfish, back in like 2008, Dwayne and I both independently advised him on a cam for a very similar combo and we were dead-on ( literally within a degree or 2 of each-other with the same spread and icl) and he's real happy with that one! He made 587 TO THE WHEELS with an AUTOMATIC by 6400 (so over 700 at the crank), I'm sure either he or Dwayne has the cam card for it. And with your induction I might just take that basic grind (it was a similar weight Cuda) and maybe spread the centers slightly and put it in just a little later to take advantage of the stick, by upping the peak power 200-300 rpm alone should get you right at 750 no fuss/no muss. 
Last edited by Streetwize; 02/13/14 12:37 PM.
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: Thumperdart]
#1578248
02/13/14 01:58 PM
02/13/14 01:58 PM
|
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
|
OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
|
Quote:
Since you`re wisely goin through Isky, talk to Rod and tell him I sent ya and see what he says............. What do want from this thing? Daily cruiser, dual purpose, where do the heads peak at,power brakes? What can you live with cos it matters...............
Hi Dom! My intention with this car is FAST with a moderate amount of maintenance. I'd like to change valve springs and rebuild the lifters every three years or so when I tear the engine down if I can get away with it. No power brakes, etc. My driver is a 1970 W100 so any passenger car chassis going to be more streetable than that thing.
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: Thumperdart]
#1578252
02/13/14 03:21 PM
02/13/14 03:21 PM
|
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
Jeremiah
OP
master
|
OP
master
Joined: Mar 2003
Posts: 9,100
Rogue River, OR
|
I agree it does sound massive in the duration department but I'm not one to judge in this situation. I think at this point my challenge is figuring out how to get a spring that will handle that kind of lift on the Victor cylinder head. Perhaps longer valves and milling off the cast in pedestals is going to have to happen. Or I could run a smaller cam and leave everything as is on the heads. Also addressing the center rocker arm pedestal I went ahead and ordered the longer -1 studs from Josh at Indy and made sure the helicoil is installed below the pedestal itself so that part should be good. I can't tell you guys how much I appreciate the insight on this. I know my combo/intended use sounds out of the ordinary but I will make it work even if it takes time. I also have a spare short block going together as a backup.
|
|
|
Re: Please Help Me Pick a Cam for my 511"
[Re: Jeremiah]
#1578254
02/13/14 03:33 PM
02/13/14 03:33 PM
|
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
|
master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
|
Quote:
Thanks for the info gentlemen. I am limited to a 275/60/15 tire so that is something to consider. That said I am just having fun not looking to break and records or win any of the classes. Just an occasional blast down the strip and plenty of street. I am not worried about getting th car to launch as I will employ a three step timing control and a trick clutch setup.
So far I have this recommendation:
275-300lbs on the seat, and 700-750lbs open
.783"-Intake and .770"-Exhaust.
286/291 @.050"
111 LSA
This recommendation was made based on the tire size, weight, and intended use of my beater. I am looking to put a Lenco behind it fwiw.
Who the helw gave you that recommendation? Thats Wayyy to big for your 10.8 comp.
Your going to want something around 265 to 270 @ .050 in a roller. Closer to 265 IMO for better street manors with that stick.
|
|
|
|
|
.jpg){kind=link}
