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#161 |
Senior Member
Join Date: May 2010
Location: Southern Maine
Posts: 1,513
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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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#162 |
Senior Member
Join Date: Jun 2010
Location: Kamloops B.C.
Posts: 392
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Wow this is priceless info thanks guys but keep it going
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#163 |
Senior Member
Join Date: May 2010
Location: upstate SC
Posts: 2,986
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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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#164 |
Senior Member
Join Date: May 2010
Posts: 1,780
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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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#165 |
Senior Member
Join Date: May 2010
Location: upstate SC
Posts: 2,986
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so that info may be good but not relevant to what I am asking
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#166 |
Senior Member
Join Date: May 2010
Location: Chester Vt
Posts: 8,919
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#167 |
Senior Member
Join Date: May 2010
Location: upstate SC
Posts: 2,986
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thanks' Ol' Ron that is what I wanted to know.
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#168 |
Member
Join Date: Oct 2011
Location: Waverly, Iowa
Posts: 64
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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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#169 |
Senior Member
Join Date: Sep 2010
Location: massachusetts
Posts: 317
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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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#170 | |
Senior Member
Join Date: May 2010
Location: Gardiner Me.
Posts: 4,200
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#171 |
Senior Member
Join Date: May 2010
Location: Indiana
Posts: 494
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L 100; aggressive idle and most report good performance. Do a search for L100; there are many threads.
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#172 |
Senior Member
Join Date: May 2010
Location: Ehh...Denver
Posts: 196
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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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#173 | |
Senior Member
Join Date: May 2010
Location: Tehachapi, CA
Posts: 361
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Vergil
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#174 |
Senior Member
Join Date: May 2010
Location: Above the gnat line in Georgia
Posts: 7,009
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I have never found anything boring about the flathead. Couldn't resist the pun.
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#175 |
Senior Member
Join Date: May 2010
Location: upstate SC
Posts: 2,986
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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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#176 |
Senior Member
Join Date: May 2010
Location: Dallas
Posts: 1,059
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wow I just spent 2 hours reading this thread, dont know how Iv missed it.
Damn good reading. |
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#177 |
Senior Member
Join Date: May 2010
Location: Napier, New Zealand
Posts: 2,001
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#178 |
Junior Member
Join Date: Nov 2011
Posts: 5
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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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#179 |
Senior Member
Join Date: Dec 2013
Location: Covedale,oh
Posts: 226
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If you hot rod e'm,you better know what you're doiing,especially the carbs...!
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#180 |
Senior Member
Join Date: May 2010
Location: Chester Vt
Posts: 8,919
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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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