how do i get .006 to figure for my dcr when...
06-24-2006, 04:03 PM
#2
Who ground the cam? Have any lobe numbers? What's the duration at .050"? What's the LSA and ICL. Is it the cam in your sig or something else?
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2013 Corvette Grand Sport A6 LME forged 416, Greg Good ported TFS 255 LS3 heads, 222/242 .629"/.604" 121LSA Pat G blower cam, ARH 1 7/8" headers, ESC Novi 1500 Supercharger w/8 rib direct drive conversion, 747rwhp/709rwtq on 93 octane, 801rwhp/735rwtq on race fuel, 10.1 @ 147.25mph 1/4 mile, 174.7mph Half Mile.
2016 Corvette Z51 M7 Magnuson Heartbeat 2300 supercharger, TSP LT headers, Pat G tuned, 667rwhp, 662rwtq, 191mph TX Mile.
2009.5 Pontiac G8 GT 6.0L, A6, AFR 230v2 heads. 506rwhp/442rwtq. 11.413 @ 121.29mph 1/4 mile, 168.7mph TX Mile
2000 Pewter Ram Air Trans Am M6 heads/cam 508 rwhp/445 rwtq SAE, 183.092 TX Mile
2018 Cadillac Escalade 6.2L A10 Pat G tuned.
LS1,LS2,LS3,LS7,LT1 Custom Camshaft Specialist For custom camshaft help press here.
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06-24-2006, 04:28 PM
#3
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Originally Posted by Patrick G
Who ground the cam? Have any lobe numbers? What's the duration at .050"? What's the LSA and ICL. Is it the cam in your sig or something else?
all at .050"
lobe size bc/ht in 1.450 ex 1.450
lobe seperation 112 cam deg
valve overlap 3.7 crank drg
intake
valve open= 5.5 BTDC
centerline = 108 ATDC
vavle close= 40.6 ABDC
duration = 226.2 crank deg
lobe lift = .33827in
vavle lift = .57506
lobe area= 26.75
exhaust
valve open= 52 BBDC
centerline = 116 BTDC
vavle close= -1.9 ATDC
duration = 230.2 crank deg
lobe lift = .34988in
vavle lift = .5548
lobe area= 27.96
thats my cam card from futural
I retatrded the cam 4degrees on my install to +0
so say my cylinder head volume is 61cc
piston head volume is -1(flycut approcimatly .065 on the intake)
gasket thickness is .045
gasket bore is 3.905
cylinder bore is 3.898
deck clearance is .-006
stroke 3.622
I get 11.473 static compression
DCR im way off
06-24-2006, 10:49 PM
#6
Quick question as well, why are you retarding the cam when you don't have heads that are going to flow well at higher lift to take advantage of the moved hp? I'm assuming you're running stock heads, or something close since your sig says no heads yet.
06-25-2006, 04:30 PM
#7
Pat, Futral cams have 50* more at .006 than .050". So, your advetised duration is 276*. Take 276/2 + 112(ICL) - 180* = 70* IVC@ .006". After puttin gyour specs into my DCR calculator, I came up with 11.17 SCR and 8.50 DCR.
ArticZ28, advancing or retarding the cam dosen't change valve lift, so what your heads flow at X lift won't be of concern. The cam will still do the same thing and be the same size, it will just do it a few RPM higher or lower. It will however change your overlap in realtion to intake or exaust biast. On a N/A motor, I'd rather be intake biast or +0.
ArticZ28, advancing or retarding the cam dosen't change valve lift, so what your heads flow at X lift won't be of concern. The cam will still do the same thing and be the same size, it will just do it a few RPM higher or lower. It will however change your overlap in realtion to intake or exaust biast. On a N/A motor, I'd rather be intake biast or +0.
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06-25-2006, 05:08 PM
#9
Originally Posted by Beast96Z
Pat, Futral cams have 50* more at .006 than .050". So, your advetised duration is 276*. Take 276/2 + 112(ICL) - 180* = 70* IVC@ .006". After puttin gyour specs into my DCR calculator, I came up with 11.17 SCR and 8.50 DCR.
ArticZ28, advancing or retarding the cam dosen't change valve lift, so what your heads flow at X lift won't be of concern. The cam will still do the same thing and be the same size, it will just do it a few RPM higher or lower. It will however change your overlap in realtion to intake or exaust biast. On a N/A motor, I'd rather be intake biast or +0.
ArticZ28, advancing or retarding the cam dosen't change valve lift, so what your heads flow at X lift won't be of concern. The cam will still do the same thing and be the same size, it will just do it a few RPM higher or lower. It will however change your overlap in realtion to intake or exaust biast. On a N/A motor, I'd rather be intake biast or +0.
Last edited by ArcticZ28; 06-25-2006 at 05:46 PM.
06-25-2006, 07:26 PM
#10
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Originally Posted by Phoenix 5.7
call allan. im sure he would be more than willing to help you figure ur DCR
Ben T.
06-26-2006, 12:06 AM
#11
Originally Posted by Studytime
Ran across this post and it reminded me of a call I made to FMS two weeks ago. I just wanted to know advertised intake duration on their 228/230 112 cam. Alan is supposed to call me back, but hasn't yet.
Ben T.
Ben T.
06-26-2006, 05:44 AM
#12
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Originally Posted by Beast96Z
Add 50*. 228+50 = 278* advertised or .006".
Ben T.
06-27-2006, 12:23 AM
#14
Originally Posted by Studytime
I would imagine this is a Cam Motion rule of thumb? I has hoping for CamDoctor numbers instead.
Ben T.
Ben T.