Cam Experts: Lobe Separation Angle?

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1MeanA said:
Whats the DCR with this cam and 8.5:1 static compression?
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Does someone have the formula to figure out the DCR using this cam:
1176: 230/236 (.050), LC: 106 (Intake), 114 (Exhaust), Lift (1.5) .488(I)/.491(E), LSA listed as 110
 
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middleagecrisis said:
Does someone have the formula to figure out the DCR using this cam:
1176: 230/236 (.050), LC: 106 (Intake), 114 (Exhaust), Lift (1.5) .488(I)/.491(E)
Click to expand...


You really need the seat to seat numbers for that.

I don’t put much into DCR. I think effective compression ratio is more important than DCR.
 
middleagecrisis said:
Does someone have the formula to figure out the DCR using this cam:
1176: 230/236 (.050), LC: 106 (Intake), 114 (Exhaust), Lift (1.5) .488(I)/.491(E), LSA listed as 110
Click to expand...
I randomly chose the Wallace calculator and got about 7:1 assuming 64 deg intake closing ABDC based on the XE274 cam. I'm not overly familiar with this metric but I don't think 7"1 is good for a na motor. I think this llustrates why cam mfg recommend minimum compression ratios.
 
B3422w5 said:
Track results and dyno results can and usually do differ.
My car that I mentioned earlier in the thread ran within half a mile per hour with the 106 or 112.
But the 106 was way way quicker. All the other incrementals were better.
Roughly tenth and a half difference.
I will always place track results way above dyno numbers.
I can pretty much guess, pretty darn close what any typical small block bracket car will make on the dyno if I have the combo particulars.
But I am often easily fooled by what a given car actually runs.
Click to expand...
You're describing much better average torque production ALA Enginemasters competition results. No surprise to me really what you experienced. J.Rob
 
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