Custom cam ordered
06-26-2006, 08:46 PM
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Custom cam ordered
I just purchased this cam:
214/212 .600''/.571'' 108LSA
I spec'd out this grind as a combination of Thunder Racing's Old Man Cam (214/220-115) and Thunder Racing's 220-112 grind. I used the same intake lobe as the OMC, because I wanted a lot of lift, small seat-seat timing, and small duration at .050''. Since duration and LSA give a certain amount of overlap and therefore a certain idle quality, a smaller .050'' means a tighter LSA is attainable while maintaining a 'tune-able' idle quality.
Let me go over that again.
A given duration and LSA give a certain amount of overlap. The bull-**** you read about low LSAs lope hard is only half of the story. The duration is a big part of this and as some have found out the size of the exhaust lobe has a larger role.
Overlap is that lumpity lump you hear. Not the tight LSA. Since, my cam has small .050'' specs, I could squeeze out a tighter LSA. The 108* LSA I chose, puts this cam at the same overlap measurment as the TR220 @ .006'' specs (48*).
So, if overlap is the same... The idle quality will also be, once tuned.
Why a tight LSA? Overlap = power... Especially with the low compression setups that we run. 9:5 aint ****, and... some of you are now familar with dynamic compression ratio. I'm doing a head/gasket swap so with this cam I'll be looking at roughly 8.5-DCR and 10.5-SCR. This and a lot of overlap SHOULD make some mean-*** torque in the 3000-5000 range.
That's all for now... No, I wont help you with a cam... I'm not smart enough for that... Just thought some of you would find this interesting.... BUT, maybe not. We'll see what happens.
214/212 .600''/.571'' 108LSA
I spec'd out this grind as a combination of Thunder Racing's Old Man Cam (214/220-115) and Thunder Racing's 220-112 grind. I used the same intake lobe as the OMC, because I wanted a lot of lift, small seat-seat timing, and small duration at .050''. Since duration and LSA give a certain amount of overlap and therefore a certain idle quality, a smaller .050'' means a tighter LSA is attainable while maintaining a 'tune-able' idle quality.
Let me go over that again.
A given duration and LSA give a certain amount of overlap. The bull-**** you read about low LSAs lope hard is only half of the story. The duration is a big part of this and as some have found out the size of the exhaust lobe has a larger role.
Overlap is that lumpity lump you hear. Not the tight LSA. Since, my cam has small .050'' specs, I could squeeze out a tighter LSA. The 108* LSA I chose, puts this cam at the same overlap measurment as the TR220 @ .006'' specs (48*).
So, if overlap is the same... The idle quality will also be, once tuned.
Why a tight LSA? Overlap = power... Especially with the low compression setups that we run. 9:5 aint ****, and... some of you are now familar with dynamic compression ratio. I'm doing a head/gasket swap so with this cam I'll be looking at roughly 8.5-DCR and 10.5-SCR. This and a lot of overlap SHOULD make some mean-*** torque in the 3000-5000 range.
That's all for now... No, I wont help you with a cam... I'm not smart enough for that... Just thought some of you would find this interesting.... BUT, maybe not. We'll see what happens.
06-27-2006, 12:38 AM
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Originally Posted by Rhino79
Interesting grind, keep us informed on your gains!
Originally Posted by tdrumm
Interesting grind Kyle. No doubt it will do well for you. What heads are you going with?
06-27-2006, 07:38 AM
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Originally Posted by JAXOps
Hey Kyle, are you installing the cam yourself? Also what springs are you going with? That cam has some nice lift to it.
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06-27-2006, 10:08 AM
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Originally Posted by bluecajun5.3
sweet dude. that truck should really come alive.
how soon is this going in or are you going to wait for daddy lance to do the install, haha
how soon is this going in or are you going to wait for daddy lance to do the install, haha
We bought a cam for him too, so I can't quite give you a definite answer as far as 'when' goes. I want his LS6 intake manifold.
Last edited by Sport Side; 06-27-2006 at 12:42 PM.
