Thread: CID Heads/Cam
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Old 06-26-2025, 10:39 AM   #1
JSH


 
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Drives: '20 ZLE
Join Date: Jun 2020
Location: Mile High
Posts: 4,195
CID Heads/Cam

We're tearing down the engine in July, so I decided to use the opportunity to change to CID heads and an updated cam. Here's the cam spec summary:

Proposed CID Camshaft:
Comp Cams LTX Custom
Hyd. Roller Camshaft 1.8 1.8
38% Fuel Lob
248 / 264 .640" / .630" 1.8 / 1.8
116+4

Current LT4 heads Camshaft:
Cam Motion Billet Core GM
Gen V LT High Lift Custom Hyd. Roller
Camshaft (38% Fuel Lobe)
235 / 248 .644" / .631" 1.8 / 1.8
118+4

My question is, do I go with LME's proposed specs? Does anyone know of a cam that works better?
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2020 ZL1LE A10.
LME LT4 390 short block, LME CID Heads, Kong E2650, FBO.
15" conversion, MT ET Street R 325/15.
100 octane: 1045hp/1055tq.
100 octane + Meth (1x10+): 1117 hp/1067 tq
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