Comp PP292H 0.509" cam with stock valve springs?
#1411900
03/31/13 02:45 AM
03/31/13 02:45 AM
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Joined: May 2008
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Aurora, Colorado
451Mopar
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Aurora, Colorado
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Anyone run a cam like this with stock valve springs? Comp recommends the #924 dual valve spring with 112 psi @ 1.9", 293 open @ 0.509" lift using 355#/in rate. The stock springs are 90 psi @ 1.88 install height, and 222 open @ 0.509" about 260#/in rate. This is for the 8.8:1 compression 440 with stock heads,intake, and manifolds 
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: 451Mopar]
#1411901
03/31/13 03:14 AM
03/31/13 03:14 AM
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Joined: Dec 2008
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USA
JoesMopar
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Quote:
This is for the 8.8:1 compression 440 with stock heads,intake, and manifolds
Springs or not, you're not going anywhere fast using any of these...
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: 451Mopar]
#1411903
03/31/13 11:19 AM
03/31/13 11:19 AM
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Posts: 3,378
Rancho Cordova, CA
Exit1965
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I run the cam in a 440, probably less compression than yours, in a 67 Dart. With eddy heads, RPM intake, double pumper and headers. 3800 stall converter and 3.91 rear.
It would not work well with all those stock parts you want to run. That cam especially likes some stall in the converter.
It would be a noisy dog with stock parts. If you want the sound, which I'll admit is nice, look into those whiplash cams from Hughes. If you want to upgrade some other parts and your converter, that Comp 509 would be a decent pick WITH the right combination of aftermarket parts (even if the compression isn't optimal).
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: GODSCOUNTRY340]
#1411905
04/01/13 12:10 AM
04/01/13 12:10 AM
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Aurora, Colorado
451Mopar
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I told the owner the cam is a bad match for the combination, but he insisted he wanted to use it because of how it will sound? The car is a 4-speed. I may have some springs off of my 440 source stealth heads, they would work ok with the cam. I also have a Crower compu-pro 271 duration, 220/230 @ 0.050", 0.486"/0.494" lift cam I was trying to talk the owner into using. I guess what irks me is the owner asks for my advice, then totally ignores everything I told him
Last edited by 451Mopar; 04/01/13 12:14 AM.
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: 1_WILD_RT]
#1411907
04/01/13 01:02 AM
04/01/13 01:02 AM
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451Mopar
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Odd situation. The owner is a friend of a friend, and my friend is assembling the engine for the owner, and I was just helping my friend because I have a bunch of the high end assembly and measuring tools (dial indicators, indicator bridge, degreewheel, balancer installer, head cc kit, valve spring mics, valve spring pressure gauges, various mics, dial bore gauge, etc.)
Originally the owner just wanted to re-ring the engine and put a bigger cam in, but the cylinders were so worn the my friend had a time just getting the pistons out past the cylinder ridge.
Working with my friend, we put together a parts list for a 10:1 compression engine using a healthy sized 276/284 (234/242 @ 0.050), 0.513"/0.533" lift Voodoo cam. The owner then just buys a stock rebuild kit from the machine shop. 8.84:1 compression pistons (with a 0.020" head gasket, and the heads cut 0.010".) The "kit" has a stockish cam, but only around 0.430"/0.440" lift.
Really the totally stock combination should have run pretty good, but not have the big cam sound the owner wants. So after the cam and heads are installed, the owner decided he wanted the Comp PP292H cam...
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: 451Mopar]
#1411909
04/01/13 01:10 AM
04/01/13 01:10 AM
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Joined: Jan 2004
Posts: 27,347
Today? Who Knows?
1_WILD_RT
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Well, the good news is he's got 3/4 of a point more compression that I expected...
"The Armies of our ancestors were lucky, in that they were not trailed by a second army of pencil pushers."
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: 1_WILD_RT]
#1411910
04/01/13 01:35 AM
04/01/13 01:35 AM
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Joined: Jun 2006
Posts: 5,163
CT
GTX MATT
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Don't run stock springs. The springs off the Stealth heads would work okay I'm sure, but the stock springs will not only float before it can make any power, but he may end up with some serious damage when he floats a valve into a piston and drops one.
It may pull decent, with all those stock parts he can certainly go faster with less cam though. If anything at least get him to put headers on it.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: GTX MATT]
#1411911
04/01/13 02:00 AM
04/01/13 02:00 AM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
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We talked him out of using the stock springs, just to prevent damage from valve float. The owner was going to order the comp 924 springs, but he din't realize they are a double spring and his heads are not cut for dual springs. As usual, we advised that he have the heads cut for dual springs when doing the valve job, just more advice ignored, but we tried... Anyhow, the stealth springs will work if I can find them? I may have sold them at the swap meet. The owner tells me he dosen't plan to drive the car hard, just wants it to sound good because he plans to sell the car. I think it is more of a show than go car? I just can't wrap my head around the owners logic? 
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: 451Mopar]
#1411912
04/01/13 12:25 PM
04/01/13 12:25 PM
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Joined: Jan 2003
Posts: 5,186
Wherever I am.
Junky
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Quote:
We talked him out of using the stock springs, just to prevent damage from valve float. The owner was going to order the comp 924 springs, but he din't realize they are a double spring and his heads are not cut for dual springs. As usual, we advised that he have the heads cut for dual springs when doing the valve job, just more advice ignored, but we tried...
Anyhow, the stealth springs will work if I can find them? I may have sold them at the swap meet.
The owner tells me he dosen't plan to drive the car hard, just wants it to sound good because he plans to sell the car. I think it is more of a show than go car? I just can't wrap my head around the owners logic?
Like was said, run the Hughes Whiplash cam. Has a nice mean sound and actually is made to run in an engine that you describe. Go to Hughes' web site and read up on it.
I run that cam in my 383. 
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: 451Mopar]
#1411914
04/02/13 06:53 AM
04/02/13 06:53 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
The owner tells me he dosen't plan to drive the car hard, just wants it to sound good because he plans to sell the car. I think it is more of a show than go car? I just can't wrap my head around the owners logic?
No. Ov course not. He couldn't possibly be tempted to stand on the thing when his buddies are around and that thing it's idling like its got a pair. Further... then he sells it to some poor schmuck, you think he's going to mention it needs to come apart? No chance... "LISTEN to that POWER..." goes the spiel... This was built by this awesome builder (insert your name here) !!! Next thing you know the new guy stands on it, blows it up, and guess who's name is reverberating around in his head...
I dont understand why even friendly builders/clients dont start with solid stipulations. You want that cam? you use real springs or find another builder.
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Re: Comp PP292H 0.509" cam with stock valve springs?
[Re: Pale_Roader]
#1411915
04/02/13 12:54 PM
04/02/13 12:54 PM
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Joined: Feb 2003
Posts: 12,675
Columbia, CT
moper
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I Live Here
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Quote:
Quote:
The owner tells me he dosen't plan to drive the car hard, just wants it to sound good because he plans to sell the car. I think it is more of a show than go car? I just can't wrap my head around the owners logic?
No. Ov course not. He couldn't possibly be tempted to stand on the thing when his buddies are around and that thing it's idling like its got a pair. Further... then he sells it to some poor schmuck, you think he's going to mention it needs to come apart? No chance... "LISTEN to that POWER..." goes the spiel... This was built by this awesome builder (insert your name here) !!! Next thing you know the new guy stands on it, blows it up, and guess who's name is reverberating around in his head...
I dont understand why even friendly builders/clients dont start with solid stipulations. You want that cam? you use real springs or find another builder.
yup. Better of sticking to your guns and telling him he's crazy and you won't do it.
Well, art is art, isn't it? Still, on the other hand, water is water! And east is east and west is west and if you take cranberries and stew them like applesauce they taste much more like prunes than rhubarb does. Now, uh... Now you tell me what you know.
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