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Grappler
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turbo/supercharger battery question
This is probably a stupid question but.......If one upgrades from a na engine to a turbo or supercharger, the compression ratio is now increased as well. That be said, will it take a stronger battery to turn over the same motor with the new effective comp ratio?
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08-19-2006, 08:42 AM
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Crotchety Old Bastard
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The compression ratio is not increased until the turbo or supercharger is on boost, and that is after the engine starts.
In many cases the C/R is lowered for a turbo or S/C application (new pistons or headwork) making the engine easier to turn over. In short, you don't need to upgrade your battery.
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RarlyL8 Motorsports / M&K Exhaust - 911/930 Exhaust Systems, Turbos, TiAL, CIS Mods/Rebuilds '78 911SC Widebody, 930 engine, 915 Tranny, K27, SC Cams, RL8 Headers & GT3 Muffler. 350whp @ 0.75bar Brian B. (256)536-9977 Service@MKExhaust Brian@RarlyL8 Last edited by RarlyL8; 08-19-2006 at 08:46 AM.. |
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08-19-2006, 08:44 AM
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Grappler
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Thanks! That does make sense. I knew one of you guys would know.
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08-19-2006, 03:06 PM
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RSR Backdate
78 Porsche 911SC 3.0L, 3.3Turbo soon. 
