DCR help
DCR help I just need some help at this point. I am just going to copy info from the build sheet. thanks
408 12:0:1
60cc et245s
wiseco pistons with-3cc up's
callies 6.125 rod
head gasket cosmetic mls .051
piston to bore .0047
deck height 9.230
quench distance .041 w/.051gasket
cam specs copyed word for word
intake and exhaust
lobe seperation= 114.2 cam deg
valve overlap=26.9 crank deg
intake
valve open 14.5 btdc
centerline 112.2 atdc
valve close 58 abdc
duration 252.5 crank deg
lobe lift .37811 in.
valve lift .64279in.
lobe area=33.23 in. * deg
exhaust
valve open 64.5 bbdc
centerline 116.2 btdc
valve close 12.4 atdc
duration 256.9 crank deg
lobe lift .38008in.
valve lift .64613in.
lobe area 33.41 in* deg
408 12:0:1
60cc et245s
wiseco pistons with-3cc up's
callies 6.125 rod
head gasket cosmetic mls .051
piston to bore .0047
deck height 9.230
quench distance .041 w/.051gasket
cam specs copyed word for word
intake and exhaust
lobe seperation= 114.2 cam deg
valve overlap=26.9 crank deg
intake
valve open 14.5 btdc
centerline 112.2 atdc
valve close 58 abdc
duration 252.5 crank deg
lobe lift .37811 in.
valve lift .64279in.
lobe area=33.23 in. * deg
exhaust
valve open 64.5 bbdc
centerline 116.2 btdc
valve close 12.4 atdc
duration 256.9 crank deg
lobe lift .38008in.
valve lift .64613in.
lobe area 33.41 in* deg
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From: Sunny London, UK
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No, I don't think there right. Hell, I get 12:6:1 SCR, but we need the advertised .006" duration of your cam to make the correct IVC point. The adding 15* to the .050" is incorrect for the types of cams we use. It's more like adding 25. See if you can find the advertised duration. Should be around 300-310* at .006" then you can do this to the exact spec, not just guessing. Wee also need the advance or ICL. However, it's looking like your DCR is going to be in the low 7:8 to 8:2 range upon my guesstimations of IVC. Assuming I guessed correctly, you could still run pump gas. I guess it depends on your wants for the motor as to wether or not this cam is going to be good or not.
Last edited by Beast96Z; Jul 6, 2006 at 12:56 PM.
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I dont have the other specs. This is the cam LME recommended for the motor. I am kinda mad now it looks like dcr is low it will most likely run like ****. I will just have someone do a custom cam after I get it on the dyno and see what it does
Originally Posted by ls1408cp
I dont have the other specs. This is the cam LME recommended for the motor. I am kinda mad now it looks like dcr is low it will most likely run like ****. I will just have someone do a custom cam after I get it on the dyno and see what it does
SO with the http://www.kb-silvolite.com/calc.php?action=comp calculator and :
You would plug in 65? Does that seem right?
You would plug in 65? Does that seem right?
Launching!
Joined: Feb 2006
Posts: 270
Likes: 0
Originally Posted by See5
SO with the http://www.kb-silvolite.com/calc.php?action=comp calculator and :
You would plug in 65? Does that seem right?
You would plug in 65? Does that seem right?
That's the number I went with,(except for my cam, it was 41* + 15= 56*) and came up with a DCR of over 9.2. My cam is smaller than your Comp, too.
That KB calculator doesn't use any LSA, or ICL numbers, either? like WTF?? or even IVC @ .006 which everybody here says you need to use. It uses IVC @ .050.
Originally Posted by exSSer
That's the number I went with,(except for my cam, it was 41* + 15= 56*) and came up with a DCR of over 9.2. My cam is smaller than your Comp, too.
That KB calculator doesn't use any LSA, or ICL numbers, either? like WTF?? or even IVC @ .006 which everybody here says you need to use. It uses IVC @ .050.
That KB calculator doesn't use any LSA, or ICL numbers, either? like WTF?? or even IVC @ .006 which everybody here says you need to use. It uses IVC @ .050.
Last edited by See5; Jul 7, 2006 at 05:27 PM.
Originally Posted by exSSer
That KB calculator doesn't use any LSA, or ICL numbers, either? like WTF?? or even IVC @ .006 which everybody here says you need to use. It uses IVC @ .050.
Originally Posted by See5
You would plug in 65? Does that seem right?
Launching!
Joined: Feb 2006
Posts: 270
Likes: 0
Very helpful, Beast.(and Patrick, too!) Your #s were close to my final calculations.(I hope) To find the ICL @ .006 I take my cam's posted duration IVC .050 and add 50. This gives me 278. Divide by 2+112 (ICL) and then subtract 180. The number plugs in the calculator in the ABDC spot.(71) In my application, I get 11.17 SCR, and 8.43 DCR using a GM MLS gasket that compresses to .052. Anybody want to buy a set of Cometic .040s for a stock bore?
