Re: Bill Mitchell Products. More Mopar blocks
[Re: dthemi]
#2717780
11/20/19 09:28 AM
11/20/19 09:28 AM
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Joined: Jan 2003
Posts: 13,351 Marion, South Carolina [><]
an8sec70cuda
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Posts: 13,351
Marion, South Carolina [><]
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Unless something has changed structurally with them to make them stronger than their original offering, I'd be careful about building a race motor with those. Can you explain or elaborate on the power level you're referring to? You build way more powerful stuff than the average Mopar guy does Darren, lol.
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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Re: Bill Mitchell Products. More Mopar blocks
[Re: fbs63]
#2717796
11/20/19 10:37 AM
11/20/19 10:37 AM
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Joined: Jan 2003
Posts: 14,491 So. Burlington, Vt.
fast68plymouth
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If the BM blocks are just like the aluminum MP were ....... there doesn’t seem to be any issues at the 900hp level.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Bill Mitchell Products. More Mopar blocks
[Re: fbs63]
#2717808
11/20/19 11:04 AM
11/20/19 11:04 AM
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Joined: Oct 2004
Posts: 3,097 back in Georgia
dthemi
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master
Joined: Oct 2004
Posts: 3,097
back in Georgia
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The main bulkheads are very thin below and between the cylinders. I've only freshend one of these first hand so what I saw was as mentioned, weak in the web, and deck. I have seen 2 broken ones, and one so poorly machined that the rear main seal top, and bottom could not physically align.The broken ones were in spray use, but nothing a good mega block couldn't have taken (maybe 1400hp). Like without a diaper they could have ran the crank over. Some said it was sub par studs, but the look to me was weak block, in the deck too.
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Re: Bill Mitchell Products. More Mopar blocks
[Re: dthemi]
#2717817
11/20/19 11:48 AM
11/20/19 11:48 AM
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Joined: Oct 2004
Posts: 3,097 back in Georgia
dthemi
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master
Joined: Oct 2004
Posts: 3,097
back in Georgia
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Here's something from them in09,,read this and tell me if this sounds like,,,' I'll just pee on your leg, then calmly explain to you it's raining"
FROM BME WORLD PRODUCTS
it seems it been discovered the world blocks were using ARP bolts and not "ARP" studs and they admit it...... check your world blocks carefully!
Gentlemen,
I'd like to introduce myself. My name is Paul Kaufman. I have worked for World Products as a technical representative and engine builder for approximately a decade. I have been building engines professionally for the better part of my life with over 40 years experience in both the private industrial sector and performance speed industry. I have been asked to express my opinion ( and that of World Products ) regarding concerns some of you may have with the main studs utilized on the Mopar iron and aluminum Hemi and Wedge blocks manufactured by World Products. World has manufactured several thousand of both the iron and aluminum blocks in the last few years and recently we have heard that some of these studs have failed when torqued. I have personally assembled many of the Hemi and Wedge engines at World Products, and have not had any issues. I would love to be able to say that there are many torque wrenches that are being used that were manufactured in third world countries and that is the problem, but that would be unfair. World Products does not manufacture studs nor do we import inexpensive hardware from China. The studs used on the Mopar iron blocks are to Mopar's engineering specs and our engineers determined those studs to be of sufficient quality for use on World Products aluminum blocks as well. These studs are not ARP. More recently World Products chose to switch to the ARP brand studs, not because we found them to necessarily be better, but to align ourselves with the hardware being utilized on our Chevy and Ford blocks. I would like to point out that over the years I have experienced failure with hardware manufactured by ARP, but grab another one and move on. I have also experienced a rod breaking or a lifter failing, all from big name brand manufacturers, but that doesn't mean the sets of parts were all defective. The point is sometimes rods break, lifters fail and bolts and studs stretch, break, threads gall, etc. It is the nature of metal objects that have been cast, poured, machined and manipulated that a small percentage will fail, regardless of who manufactured the item. If you find one defective stud that does not mean all the studs are bad. As with most manufacturers, World Products has a warranty policy. Should you find any defect in any of World Products parts or components within one year of purchase simply contact us and we will be more than happy to exchange that defective part. If you would like to change out your hardware to a complete set of ARP studs, you can purchase them from your local ARP dealer or retailer. The caps are located by ring dowels and block registers. The line bore will not be affected. The torque rating on the ARP studs remains the same. Thanks for your time, Paul
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Re: Bill Mitchell Products. More Mopar blocks
[Re: rickseeman]
#2717830
11/20/19 12:46 PM
11/20/19 12:46 PM
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Joined: Jan 2003
Posts: 14,491 So. Burlington, Vt.
fast68plymouth
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So. Burlington, Vt.
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After getting to freshen the two 900hp 572’s I built from MP/World blocks....... I’d have no hesitation using them again for similar builds.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123 Dealer for Comp Cams/Indy Heads
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Re: Bill Mitchell Products. More Mopar blocks
[Re: fast68plymouth]
#2717833
11/20/19 12:58 PM
11/20/19 12:58 PM
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Joined: Jan 2003
Posts: 19,355 Las Vegas
Al_Alguire
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Las Vegas
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A BM block was recently delivered to Las Vegas.....FWIW I have one living just fine at 1200HP NA in my Stratus. There were some things we had to fix with machining but nothing more than a typical Indy block needs.
"I am not ashamed to confess I am ignorant of what I do not know."
"It's never wrong to do the right thing"
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Re: Bill Mitchell Products. More Mopar blocks
[Re: dthemi]
#2718373
11/22/19 01:01 PM
11/22/19 01:01 PM
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Joined: Oct 2011
Posts: 326 Alberta
Wookie316
enthusiast
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Joined: Oct 2011
Posts: 326
Alberta
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I am currently working on a 572 based off an original block. It will probably be in the 800 range with a set of 440-1’s that Dwayne has done for me. Should be a great bracket motor in my 71 Charger. Molnar Crank and rods. Diamond pistons. It will be about 14-1. At this power level, I do not have any worries. Should hold together well. Hoping it will be on the dyno in Feb.
1971 Plum Crazy Super Bee. 572 World Aluminum block with a Cope 727 & Dana 4.10 out back. 9.88 @ 138 with a 1.35 60 NA. Dialed back to 10.0’s. 4000 lbs with me in it.
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Re: Bill Mitchell Products. More Mopar blocks
[Re: fbs63]
#2719186
11/25/19 02:40 PM
11/25/19 02:40 PM
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Joined: Jan 2003
Posts: 17,838 S.E. Michigan
ZIPPY
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The main bulkheads are very thin below and between the cylinders. I can remember two actual complaints...some had paper thin spots that could be broken through easily with a sharp object. (So that means a whole lot more than two were really out there) The response from the ivory tower was, the product was developed using FEA, and the thin areas in the mains were, at that time, considered deliberate. I was also given examples of several builders who deliberately opened up/machined away those thin areas which I was told was for a reduction in Windage losses. This wasn't a debatable topic at that time, and these are not my ideas. The corporate Gods had spoken, LOL. I'm just the messenger so don't shoot. for the price charged, I'd prefer overbuilt rather than under.
Rich H.
Esse Quam Videri
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