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Hemi block P5155072 questions #883372 12/18/10 09:36 PM 12/18/10 09:36 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER OP I Live Here
RUNCHARGER OP I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	I have a chance to pick up a P5155072 block for my next hemi but can't find info on it. Is this block a standard height cam or raised? I know it's finish honed to 4.25 but it is siamesed and I would like to know if it was designed to go to 4.5 as that is what I want to build this time. Any help is appreciated. And lastly, how is the machining on these (I'll have it bored anyway but I was more concerned about line hones of mains and cam and how true the decks are)? I would sooner have the older style MP block but I won't buy used and they are a bit hard to find new. Sheldon

Re: Hemi block P5155072 questions [Re: RUNCHARGER] #883373 12/18/10 09:43 PM 12/18/10 09:43 PM
Joined: Jan 2003 Posts: 1,938 Sonora CA Mopar_Rich top fuel
Mopar_Rich top fuel Joined: Jan 2003 Posts: 1,938 Sonora CA	P5155072 Gray Iron 4.25 bore Siamese bores Finish honed Standard Cam height Uses Mopar casting #5153843 Max bore is 4.36 (but sonic checking may allow more) Always machine any new block. This means: Line hone Equalize decks Check lifter angles Check bore taper (rehone sometimes required) Etc ...

Re: Hemi block P5155072 questions [Re: Mopar_Rich] #883374 03/05/13 10:57 AM 03/05/13 10:57 AM
Joined: Jan 2003 Posts: 13,363 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,363 Marion, South Carolina [><]	I have one of these blocks too, but have not had it sonic checked yet. Anyone know what bore these blocks are capable of? CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

Re: Hemi block P5155072 questions [Re: an8sec70cuda] #883375 03/05/13 11:29 AM 03/05/13 11:29 AM
Joined: Jan 2003 Posts: 75,005 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,005 U.S.S.A.	Quote: I have one of these blocks too, but have not had it sonic checked yet. Anyone know what bore these blocks are capable of? Did it have a sticker on it saying what max bore is ? You really need to have it sonic checked well , the blocks before world took over are hit or miss .

Re: Hemi block P5155072 questions [Re: JohnRR] #883376 03/05/13 11:33 AM 03/05/13 11:33 AM
Joined: Jan 2003 Posts: 13,363 Marion, South Carolina [><] an8sec70cuda I Live Here
an8sec70cuda I Live Here Joined: Jan 2003 Posts: 13,363 Marion, South Carolina [><]	Quote: Quote: I have one of these blocks too, but have not had it sonic checked yet. Anyone know what bore these blocks are capable of? Did it have a sticker on it saying what max bore is ? You really need to have it sonic checked well , the blocks before world took over are hit or miss . Nope, it didn't have a sticker on it when we got it. Just the tag w/ the part number on it tie wrapped around the front main cap. CHIP '70 hemicuda, 575" Hemi, 727, Dana 60 '69 road runner, 440-6, 18 spline 4 speed, Dana 60 '71 Demon, 340, low gear 904, 8.75 '73 Chrysler New Yorker, 440, 727, 8.75 '90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt '06 GMC 2500HD LBZ Duramax

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