cam specs

z-24turbo3.1 · Posted: Mon Nov 06, 2006 4:51 pm Post subject: cam specs

does anyone know how to find lobe seperation or overlap on a cam from other specs?

SuperDave · Posted: Mon Nov 06, 2006 8:54 pm Post subject: Re: cam specs

z-24turbo3.1 · Posted: Mon Nov 06, 2006 9:23 pm Post subject:

duration at .050"- 214 intake, 224 exhaust
adv. duration- 280 intake, 290 exhaust
lift- intake .433, exhaust .466
lobe center- intake 107, exhaust 117

syn · Posted: Tue Nov 07, 2006 3:08 am Post subject:

that looks close to mine iirc

z-24turbo3.1 · Posted: Tue Nov 07, 2006 5:53 am Post subject:

yeah.. it is syn. with 1.6:1 rockers, the lift bumps up to .498

z-24turbo3.1 · Posted: Thu Nov 09, 2006 11:06 am Post subject:

no one?

SuperDave · Posted: Thu Nov 09, 2006 11:07 am Post subject:

pretty much impossible from those specs... but i can tell you that it's most likely between 108 and 110 LSA and probably has a decent ammount of overlap. Looks like a N/A cam

juicedz4 · Posted: Thu Nov 09, 2006 2:55 pm Post subject:

well if it had 110LSA it would have -1 overlap
(total duration)/4 - LSA * 2 = overlap (from what I recall)

so thats

214+224 / 4 = 109.5 - 110= -0.5 * 2 = -1

or if you use adv. duration youd have 65 deg overlap

I believe your supposed to use the adv duration with that formula

Dan

juicedz4 · Posted: Thu Nov 09, 2006 2:59 pm Post subject:

So I was trying to say IF the LSA is indeed 110, then the overlap would be 65. Def a N/A cam.

dan

z-24turbo3.1 · Posted: Thu Nov 09, 2006 9:04 pm Post subject:

well how do you find lobe seperation? thats what im woundering..

juicedz4 · Posted: Thu Nov 09, 2006 10:30 pm Post subject:

I just did some googling. Looks like the LSA is the intake + exhaust angle / 2

So youd have 107+117 / 2 = 112

So overlap would be a bit less than I calculated earlier.

z-24turbo3.1 · Posted: Fri Nov 10, 2006 8:39 am Post subject:

i heard that seperation for turbo cams was supposed to be between 112-114 ? is that right? if so.. this cam should be alright..?

juicedz4 · Posted: Fri Nov 10, 2006 12:32 pm Post subject:

Ya, my builder and I just finished talking about just this not long ago. He said 114-115.

as for lift, just run whatever you can without worrying about coil bind etc. The air will get in there.

Dan

z-24turbo3.1 · Posted: Sat Nov 11, 2006 10:16 am Post subject:

ok.. so 112 isnt optimum.. but it should still work decent?

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