| Go back to previous topic | | Forum name | 4G63 Tech | | Topic subject | RE: 9.6:1 comp, head gasket handle 300hp? | | Topic URL | http://forums.2gnt.com/dcboard.php?az=show_topic&forum=67&topic_id=10715&mesg_id=10718 |
10718, RE: 9.6:1 comp, head gasket handle 300hp?
Posted by HybriDSM, Dec-31-69 06:00 PM
Edit: I also for got to mention that 420A pistons have a different bore than the 4G63. You'd have to pull the engine to get it overbored and chances are, that over bore wuold make your cylinder walls far too thin. A .060" over 4G63 pistons is still only 86.5 mm. That and NT pistons aren't designed to hold boost. There are a ton of reasons why you won't want to do this.
4G63 = 85 mm or 3.346"
420A = 87.5 mm or 3.445"
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