11-22-2011, 02:29 PM | #161 |
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Re: Boring a flathead
Interesting to see how many here have sliced up a block for research. I have a sliced up port much like hotcoupe's. Did it with a sawzall and a lot of help taking turns. That was some hard iron.
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11-23-2011, 11:57 PM | #162 |
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Re: Boring a flathead
Wow this is priceless info thanks guys but keep it going
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02-17-2012, 02:04 PM | #163 |
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Re: Boring a flathead
OK tried to read thru to get opions on what limit there is to boring a flatty and got a head ache, Here is my question--have 3 1/16 41 engine with raised intake deck, worn out even further the sleeves. I have a set of 3 3/16 40 over pistons I could use-do you think I will overbore my block to use these pistons. A few years back I had a 40 merc block ( 3 3/16) with large journal crank and it was 40 over and these blocks look the same
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02-17-2012, 02:47 PM | #164 |
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Re: Boring a flathead
you boar a 32 - 36 21 stud to more than 060 you can always rent it out to heat a 6 story building
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02-17-2012, 03:45 PM | #165 |
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Re: Boring a flathead
so that info may be good but not relevant to what I am asking
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02-17-2012, 05:24 PM | #166 |
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Re: Boring a flathead
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02-17-2012, 06:10 PM | #167 |
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Re: Boring a flathead
thanks' Ol' Ron that is what I wanted to know.
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02-17-2012, 06:42 PM | #168 |
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Re: Boring a flathead
Not to hijack the thread, but reading all these posts this has left my head spinning. SO! for all you Flathead enthusiasts, I am looking to build a 8BA with 2x2 intake for street use. I plan to clean up the ports from years of carbon build up. My worry is that it is already bored 60 over, I plan to sonic test the walls and bore it out to 80, 100, or 125 over and use a stock Merc crank. I am stumped over what cam to use. I know that everyone has their favorites, but what do you all recommend for a good street use that has a good thump at idle.
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02-17-2012, 07:06 PM | #169 |
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Re: Boring a flathead
had a 3/ 7/16 x 4 in my 48 conv. bought the engine from New England Speed used -- ex Norwood arena engine--used to drive to Sanford last Sun of the mnth from Arlington Ma, race all day then drive home --often wonder if Walt and i crossed paths back then.
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02-17-2012, 08:14 PM | #170 | |
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Re: Boring a flathead
Quote:
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02-17-2012, 08:37 PM | #171 |
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Re: Boring a flathead
L 100; aggressive idle and most report good performance. Do a search for L100; there are many threads.
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02-17-2012, 08:53 PM | #172 |
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Re: Boring a flathead
Hey Vergil, with the scarcity of good blocks, these days, do ya think a good welder can fix that sawed up one of yours and getter goin again?...slim
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02-17-2012, 09:27 PM | #173 | |
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Re: Boring a flathead
Quote:
Vergil
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02-17-2012, 09:52 PM | #174 |
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Re: Boring a flathead
I have never found anything boring about the flathead. Couldn't resist the pun.
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02-17-2012, 11:15 PM | #175 |
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Re: Boring a flathead
We are going to do a sonic test, even if I have to purchased a tester. I have been reading on the procedures and it is not really very hard to do. Will keep everyone informed as we build this engine. Thanks Ol Ron
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02-18-2012, 12:00 AM | #176 |
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Re: Boring a flathead
wow I just spent 2 hours reading this thread, dont know how Iv missed it.
Damn good reading. |
02-18-2012, 01:29 AM | #177 |
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Re: Boring a flathead
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06-23-2014, 12:19 AM | #178 |
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Re: Boring a flathead
i have purchased a set of 3 3/8 pistons the seller says their fore inch stroke they check out 3 3/8,but not sure if they are for my 4 inch crank can you please help my engine has not been tore down yet, is thear any way to measure the pin location to see if they are correct for 4 inch crank they are silvolite pistons does not any nombers on pistons but they check out to 3/8 what do you thank thanks steve
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06-23-2014, 04:30 AM | #179 |
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Re: Boring a flathead
If you hot rod e'm,you better know what you're doiing,especially the carbs...!
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06-23-2014, 08:17 AM | #180 |
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Re: Boring a flathead
The quickest way to check stroke of a piston is to compair the wrist pin location to another piston ofknown stroke. The pin is closer to the top of the piston with the longer stroke, by 1/8"
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