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Re: Help pick a cam Agan a lttle long
[Re: 67mprfan]
#1746701
02/06/15 01:09 AM
02/06/15 01:09 AM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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Here's a pic of rocker arms
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Help pick a cam Agan a lttle long
[Re: 67mprfan]
#1746703
02/06/15 01:30 AM
02/06/15 01:30 AM
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Joined: Jul 2013
Posts: 561
USA
B3RE
mopar
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mopar
Joined: Jul 2013
Posts: 561
USA
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From what I can see, it looks like the fulcrum is too low and there is a good bit of sweep across the tip. I am increasingly confident there is trouble here.
Mike Beachel
I didn't write the rules of math nor create the laws of physics, I am just bound by them.
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Re: Help pick a cam Agan a lttle long
[Re: BradH]
#1746705
02/06/15 12:07 PM
02/06/15 12:07 PM
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Joined: Jul 2013
Posts: 561
USA
B3RE
mopar
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mopar
Joined: Jul 2013
Posts: 561
USA
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Quote:
Regardless of possible valve train geometry and/ or spring issues, the OP has a big cam and heads that probably want to be spun another 1000 RPM at his displacement.
If he wants to keep the RPM down, he needs to band-aid it with a shorter duration cam to move the torque curve lower.
IMO, he needs to decide what approach to take, first.
I don't think we disagree here, Brad. As you and I both mentioned, he should have a smaller cam for his combo. I agree he should be turning a lot more rpm than he is, but the question is, why isn't he. That brings up the geometry. But, if he wants the combination to be right, it will need more gear and converter for this cam, or a cam change to work with his existing setup. Either way, he needs to decide which cam he is going with and then deal with the geometry, since valve lift plays a role in the setup. My point is, it needs attention the way it is now, but I agree the combination needs to be corrected first. It will still need the valvetrain set up properly though. 
Mike Beachel
I didn't write the rules of math nor create the laws of physics, I am just bound by them.
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Re: Help pick a cam Agan a lttle long
[Re: 67mprfan]
#1746707
02/06/15 10:29 PM
02/06/15 10:29 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
master
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master
Joined: May 2004
Posts: 3,210
robin hood country
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When i ran a dominator with the hood on, it took 7 mph off the car. It was a similar height to yours.
mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: Help pick a cam Agan a lttle long
[Re: 67mprfan]
#1746708
02/06/15 11:59 PM
02/06/15 11:59 PM
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Joined: Oct 2009
Posts: 1,267
North, Alabama
D-50
pro stock
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pro stock
Joined: Oct 2009
Posts: 1,267
North, Alabama
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Quote:
Quote:
If he wants to keep the RPM down, he needs to band-aid it with a shorter duration cam to move the torque curve lower.
I agree he should be turning a lot more rpm than he is, but the question is, why isn't he
if he wants the combination to be right, it will need more gear and converter for this cam, or a cam change to work with his existing setup.
Ok this is where I start getting confused so a smaller duration cam won't let the car rpm as high
Also I tried shifting @ 6700 made no difference shifted lower the car picked up
I'm running a 4.56 now with 31x14 tires what gear ad stall would be right
Also if you can see the pic clear my carb is sitting REAL close to top of hood scoop 
Thanks again for all the input 
Why not try to run your car with the hood off and see if the hood clearance is a problem.
1.33 60 ft,6.21 at 110.59 in the 1/8, pump gas small block,2950lbs,drag radials,mufflers and driven to track ...
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Re: Help pick a cam Agan a lttle long
[Re: D-50]
#1746709
02/07/15 12:42 AM
02/07/15 12:42 AM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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My winter project to correct hood scoop problem
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Help pick a cam Agan a lttle long
[Re: 67mprfan]
#1746710
02/07/15 01:10 AM
02/07/15 01:10 AM
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Joined: Jul 2013
Posts: 561
USA
B3RE
mopar
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mopar
Joined: Jul 2013
Posts: 561
USA
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Quote:
Quote:
If he wants to keep the RPM down, he needs to band-aid it with a shorter duration cam to move the torque curve lower.
I agree he should be turning a lot more rpm than he is, but the question is, why isn't he
if he wants the combination to be right, it will need more gear and converter for this cam, or a cam change to work with his existing setup.
Ok this is where I start getting confused so a smaller duration cam won't let the car rpm as high
Also I tried shifting @ 6700 made no difference shifted lower the car picked up
I'm running a 4.56 now with 31x14 tires what gear ad stall would be right
Also if you can see the pic clear my carb is sitting REAL close to top of hood scoop
Thanks again for all the input
A smaller cam with a stable valvetrain is very likely to rpm higher than a bigger cam with an unstable valvetrain. The smaller cam will increase the lower and mid range power which will accelerate the car quicker at lower rpm, all else being equal.
The reason, IMHO, that you picked up when your shift point was lowered, is because at 66-6700 is where the springs started to lose control of the valves and the car laid down. The cam wasn't near done yet and the springs were probably not the problem. Improper valvetrain geometry over stresses the springs and they lose control. That doesn't mean the springs are bad. They just can't handle the extra stress that they shouldn't be seeing in the first place. Hey, a ten pound hammer sitting on your foot won't hurt, but that same hammer dropped from a ladder on your foot will increase your vocabulary.  Imagine the hammering the valvetrain takes if everything isn't right.
Mike Beachel
I didn't write the rules of math nor create the laws of physics, I am just bound by them.
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Re: Help pick a cam Agan a lttle long
[Re: B3RE]
#1746711
02/09/15 09:55 PM
02/09/15 09:55 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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Ok how about a cam that is 276/276 681 lift n a 108 lsa
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Help pick a cam Agan a lttle long
[Re: 67mprfan]
#1746712
02/10/15 10:04 PM
02/10/15 10:04 PM
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Joined: May 2004
Posts: 3,210
robin hood country
deaks
master
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master
Joined: May 2004
Posts: 3,210
robin hood country
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Have you tried the car without the hood ? you might get a shock when you try your new hood.
Mick
69 Dart GTS 440 mopar .590 cam, Edelbrock heads, 3200#
best et 6.45, 106.78, 10.14, 132.88 mph, 1.47 60ft
best 60ft 1.36
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Re: Help pick a cam Agan a lttle long. (Update)
[Re: 67mprfan]
#2157010
09/18/16 09:24 PM
09/18/16 09:24 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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Hello all
1st I need to say a BIG THANKS to Dwayne Porter for putting up with me.
He spec me out a cam that's 270/274 693 lift 108cl installed in at 104 with about 10 passes now the car runs a lot better new Best 1/8th mile is 106.18 still have more tuning to go but really wanted to say Thanks again Dwayne
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Help pick a cam Agan a lttle long. (Update)
[Re: 67mprfan]
#2157173
09/19/16 01:16 AM
09/19/16 01:16 AM
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Joined: Jan 2003
Posts: 14,496
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,496
So. Burlington, Vt.
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Glad to hear it's working out Eldon  How's the 60' with that cam? Check the cranking compression yet?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Help pick a cam Agan a lttle long. (Update)
[Re: fast68plymouth]
#2157451
09/19/16 03:22 PM
09/19/16 03:22 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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Glad to hear it's working out Eldon How's the 60' with that cam? Check the cranking compression yet? So far the 60's have been 1.41 yesterday to 1.44 No compression test yet ... It pulls good on the top end
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Help pick a cam Agan a lttle long. (Update)
[Re: 67mprfan]
#2157606
09/19/16 06:36 PM
09/19/16 06:36 PM
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Joined: Jan 2003
Posts: 6,591
Canton, Ohio
Sport440
master
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master
Joined: Jan 2003
Posts: 6,591
Canton, Ohio
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The new cam is better then the bigger one you had for your combo.
Did you have the vert worked on as well?
If I were to do any changes, id install that cam at a 100 LIC and go with a 5000 vert. Your Tight carb proximity to the hood isn't helping things either. But, maybe your new hood is on now.
You gave your new mph for the 1/8th as well as the 60 ft. What was your ET? Your 1.41 to 1.44 60,s are soft IMO for your combo. Get that fixed and your in the 9,s.
Edit; you also asked about gear. You have to much gear IMO. I would lose the 31 x 14,s and go with 32 x 12,s or even 32 x 10,s with those 4.56,s You shouldn't need that much tire with your 3000# combo
Last edited by Sport440; 09/19/16 10:45 PM.
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Re: Help pick a cam Agan a lttle long. (Update)
[Re: Sport440]
#2157629
09/19/16 06:57 PM
09/19/16 06:57 PM
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Joined: May 2005
Posts: 1,030
ohio
67mprfan
OP
super stock
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OP
super stock
Joined: May 2005
Posts: 1,030
ohio
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The new cam is better then the bigger one you had for your combo.
Did you have the vert worked on as well?
If I were to do any changes, id install that cam at a 100LS and go with a 5000 vert. Your Tight carb proximity to the hood isn't helping things either. But, maybe your new hood is on now.
You gave your new mph for the 1/8th as well as the 60 ft. What was your ET? Your 1.41 to 1.44 60,s are soft IMO for your combo. Get that fixed and your in the 9,s. Didn't get a new Best far as E.T yet mainly because I haven't touched anything since putting back together just b4 the Mopar Nat's in August. other than experimenting with squirters I agree with 60 fts
71 demon stock stroke 440/indy ez-1 running 10.10 @ 132.14 mph in the 1/4 and 6.36 @ 107.46 mph in the 1/8 not in the same weekend but It did it then I sold it.
67 Belvedere that worked it's way in the 10's
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Re: Help pick a cam Agan a lttle long
[Re: 67mprfan]
#2158584
09/21/16 08:20 AM
09/21/16 08:20 AM
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Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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After rereading this post, I am sure something is holding this car back, and by a fair amount. The parts are there for enough power to go 9.60s,IMHO. Just comparing the 1/8th ET to 1/4 ET shows it should run at least a 9.99 or so, based on the 6.36 1/8th mile ET. Getting the hood to carb problem solved, proper springs and more rpm (6800 or more) it ought to surprise you.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Fuel delivery based on what op told me was questionable but he swore it was good...........I thought you said you were going in a different direction like late model efi stuff at least that`s what I remember you saying......... 
