|
#1
|
|||
|
|||
.060 over bore on 78' 360
Can you put a .060 overbore on a '78 360 motor and are speed pro pistons good like the h405 with 8.66:1 and is there a way to make that higher but is with 68.4cc heads and aren't the stock '78 360 heads 65cc.
|
#2
|
||||
|
||||
Quote:
|
#3
|
|||
|
|||
I am pretty sure that the EARLY 360 blocks are more likely to accept that much overbore, pre-75 or so. I doubt that a 78 block would be a good year for .060".
|
#4
|
||||
|
||||
I have heard not to bore a newer (74 and up) 360 block more than .030 but ehostler has the most correct answer by advising to have it sonic tested to determine the wall strength. In my opinion any time you bore more than .020 you should have it sonic tested.
|
#5
|
||||
|
||||
72dart318;
You would have to cut the head and deck the block to get a good ratio from those pistons. Better off getting a set of KB pistions that are zero deck and use a .039 gasket with a 72 cc head to get 9.8-1 comp. for use with 93 octane. KB also makes a piston with a little less comp than the one mentioned before. Overboring for comp. sake is a bad way to go about it. I see where your going with that question and the direction is bad. Even more so with later year blocks. Keep overboreing to a min. so the cyl. wall stays thick and stiff. Which is good for power output and long life. If the wall is thin, then it can flex letting air and fuel slip by and ruining your oil and dropping comp. a tad for less power. Get the book on how to rebuild and how to hot rod small block MoPars. Read up! |
Thread Tools | |
Display Modes | |
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
360 eng max bore | daveashsr | Circle Track Chat | 3 | 10-19-2015 03:52 PM |
413 Re-bore | Greg55_99 | Performance Talk | 14 | 08-17-2007 05:51 PM |
over bore on a 340 | chrisw21_2000 | Performance Talk | 10 | 11-23-2006 10:38 PM |
GO over .060 bore? and a few other ? | ITHURTZ | Performance Talk | 8 | 10-19-2006 04:25 PM |
spread bore to square bore carb adapter... | creative1 | Performance Talk | 2 | 10-30-2003 01:35 PM |