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engine bore #212370 02/02/09 09:00 PM 02/02/09 09:00 PM
Joined: Aug 2004 Posts: 65 OMAHA poly OP member
poly OP member Joined: Aug 2004 Posts: 65 OMAHA	I have heard both ways,,,,,,,,can a 413 be bored to accept 440 pistons????

Re: engine bore [Re: poly] #212371 02/02/09 09:10 PM 02/02/09 09:10 PM
Joined: Nov 2006 Posts: 3,407 S.E. Florida, USA rrunner master
rrunner master Joined: Nov 2006 Posts: 3,407 S.E. Florida, USA	Its a 426, not 440? Last edited by rrunner; 02/02/09 09:11 PM.

Re: engine bore [Re: rrunner] #212372 02/02/09 10:54 PM 02/02/09 10:54 PM
Joined: Aug 2004 Posts: 65 OMAHA poly OP member
poly OP member Joined: Aug 2004 Posts: 65 OMAHA	NO,,,,,,,it is a 1964 413 RB block, and I want to use 440 pistons in it, but am questioning if there is enough block there to bore it safely

Re: engine bore [Re: poly] #212373 02/02/09 11:12 PM 02/02/09 11:12 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	I heard they used to bore 413's to take 426 wedge pistons and that was as far as you could go. 413 = 4.1875 bore 426 = 4.25 440 = 4.32 Boring a 413 to take standard bore 440 pistons would be like boring it .13 over, that's a huge overbore. A 426 piston would need a 413 bored a hair over .060 over.

Re: engine bore [Re: poly] #212374 02/02/09 11:20 PM 02/02/09 11:20 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	The bore is .133" larger & there would be some core shift live every 24 hour block of time like it's your last day on earth

Re: engine bore [Re: DaytonaTurbo] #212375 02/02/09 11:31 PM 02/02/09 11:31 PM
Joined: Aug 2004 Posts: 65 OMAHA poly OP member
poly OP member Joined: Aug 2004 Posts: 65 OMAHA	Okay, makes sense the way you say it, only in 64, the block casting number is the same for 413, and 426, and I was thinking that they had .060 over pistons for the 426, which has you getting in the range of the 440

Re: engine bore [Re: poly] #212376 02/02/09 11:50 PM 02/02/09 11:50 PM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	You might contact egge machine shop & see what they have(or can make). It would not be cheap but to get a 413 up & running it might be something to consider. live every 24 hour block of time like it's your last day on earth

Re: engine bore [Re: RapidRobert] #212377 02/03/09 10:15 AM 02/03/09 10:15 AM
Joined: Jan 2003 Posts: 1,476 G gtx69 super gas
gtx69 super gas G Joined: Jan 2003 Posts: 1,476	www.Hughesengines.com also carrys pistons for the older blocks also

Re: engine bore [Re: poly] #212378 02/03/09 10:20 AM 02/03/09 10:20 AM
Joined: Jan 2003 Posts: 75,095 A Banana Republic near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,095 A Banana Republic near you.	Quote: Okay, makes sense the way you say it, only in 64, the block casting number is the same for 413, and 426, and I was thinking that they had .060 over pistons for the 426, which has you getting in the range of the 440 You can ask the question 600 different ways and the answer will be the same . The only way you will know exactly how far the block can be safely overbored is AFTER a SONIC CHECK .

Re: engine bore [Re: poly] #212379 02/03/09 02:39 PM 02/03/09 02:39 PM
Joined: Jan 2003 Posts: 2,648 USA M max super gas
max super gas M Joined: Jan 2003 Posts: 2,648 USA	Quote: Okay, makes sense the way you say it, only in 64, the block casting number is the same for 413, and 426, and I was thinking that they had .060 over pistons for the 426, which has you getting in the range of the 440 in the old days it was quite common to bore a 426 +.070 over and use standard bore 440 pistons. as a matter of fact i have a 1964 426 in the garage right now that was done that way. but as John said, it's best to sonic test the block before doing any excessive boring to see just what you can do.

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