aluminum wedge block ( RB)
#2996185
12/17/21 04:42 PM
12/17/21 04:42 PM
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Joined: Feb 2017
Posts: 566 Texas
RustyM
OP
mopar
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OP
mopar
Joined: Feb 2017
Posts: 566
Texas
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Hi folks, Been a while since i posted here, had to have emergency lung surgery from a drs mistake , 13 days in icu and 4 weeks of being chained up at home, and i don't even like television! But, im back at work now and, back here needing help. We ordered a Bill Mitchell aluminum block 6 months ago, my buddy ordered it from Bill instead of Todd Marsh or Best and, well, you guys know the rest of the story and, NO, i'm not busting Bill's chops, i understand what he has to do and, the dealers simply must come first. However, we are running out of time, heads are at Dwayne's , new rockers ordered etc and, we are still in the loop of "blems ate up too many blocks, maybe next month. I get it, again, this post is saying Nothing negative about Bill Mitchell , its just business.
So, does anyone on here have a aluminum RB block they want to sell? Trying to build a 540, know anyone that wants to sell one?
If so, please hit me up.
Thanks so much as usual. Praying everyone has a wonderful Christmas.
P.S. if Santa brings you one too many engine blocks, please let me know! grin
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Re: aluminum wedge block ( RB)
[Re: RustyM]
#2996311
12/18/21 01:14 AM
12/18/21 01:14 AM
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Joined: May 2016
Posts: 100 Louisiana
BiomedTechGuy
member
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member
Joined: May 2016
Posts: 100
Louisiana
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So, does anyone on here have a aluminum RB block they want to sell? Trying to build a 540, know anyone that wants to sell one? If so, please hit me up. Thanks so much as usual. Praying everyone has a wonderful Christmas. P.S. if Santa brings you one too many engine blocks, please let me know! grin
I bought my BMP RB 4.49 bore block through my builder/dealer, and because of my situation with tight finances, and thanks to our prior business experience and his consideration, I just got mine paid for, so as much as I'd like to help, I'm not really the only one who worked towards making it happen. I did have a question regarding the displacement you chose, as mine will be a 541 (4.25 stroke x 4.50 bore) AndyF concurred, and I guess that should be all I need to know, but I was looking at piston speed and a modest HP (6XX) and torque (700) goals, and figured that even though it will take a 4.50 stroke without clearancing, I'd be better off at 541. I'm feeding it with a 6bbl too, so there's that. Why are you going with the 541 displacement?
Last edited by BiomedTechGuy; 12/18/21 01:16 AM.
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Re: aluminum wedge block ( RB)
[Re: Dragula]
#2996431
12/18/21 01:15 PM
12/18/21 01:15 PM
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Joined: Dec 2013
Posts: 403 Romulus, MI
GTS340
mopar
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mopar
Joined: Dec 2013
Posts: 403
Romulus, MI
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With a girdle they hold up nicely if you keep the rpm in check. Keep repeating that if it makes you feel better, but that girdle plate does not hurt anything, nor does it help anything. Feel free to post a FEA simulations to make me see the advantage they provide.
Last edited by GTS340; 12/18/21 01:27 PM.
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Re: aluminum wedge block ( RB)
[Re: GTS340]
#2996442
12/18/21 01:36 PM
12/18/21 01:36 PM
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Joined: Dec 2021
Posts: 1,126 Loudoun County, VA
Brad_Haak
super stock
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super stock
Joined: Dec 2021
Posts: 1,126
Loudoun County, VA
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With a girdle they hold up nicely if you keep the rpm in check. Keep repeating that if it makes you feel better, but that 1/4" thick girdle plate does not hurt anything, nor does it help anything. Feel free to post a FEA simulations to make me see the advantage they provide. Can you post FEA simulations that show they don't help? I'm not sold on girdles either way, but you can't call out someone like that if you can't back up your side of the argument.
2021 Challenger 6.4L Scat Pack 1320 100% stock: 1.680, 11.894 at 113.75 (DA 175 ft) weight reduction, wheels, tires, Hellcat air box: 1.661, 11.686 at 115.97 (DA 710 ft)
1973 Challenger 452 ci street/strip [2008] pump gas, DOT radials: 1.454, 10.523 at 126.44 (DA 514 ft)
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Re: aluminum wedge block ( RB)
[Re: RustyM]
#2996515
12/18/21 04:33 PM
12/18/21 04:33 PM
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Joined: May 2016
Posts: 100 Louisiana
BiomedTechGuy
member
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member
Joined: May 2016
Posts: 100
Louisiana
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We have the same stroke your looking to build, have run it for years with no issues. We just need a bit more power so, bit more bore size, new cam, Dwayne doing some head work and we should get what we need. You wont have any piston speed issues to worry about , we have turned this one 7200 many times with no issues. Bearings we just took out after 3 years still look new and crank journals look like mirrors , rod bearings all looked good as well. I wouldn't worry about piston speed on your build. Not to hijack, so I'll be brief. I'm assuming the quoted is referring to the 541 bore/stroke 4.50/4.25 combo. If so, that's a great report. I was curious why the OP was choosing that displacement. As far as a factory block w/a girdle, I believe the BCR cap and girdle system is the best design, and was going to use that, BUT I figured why push towards the limit of a factory block, especially since I'm probably only going to get ONE shot at building a stroker. With the BMP block and my modest power expectations, I don't think I will ever worry about the block, or anything else breaking from being too close to its performance limits, and that peace of mind is invaluable at this point.
Last edited by BiomedTechGuy; 12/18/21 04:35 PM.
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Re: aluminum wedge block ( RB)
[Re: GTS340]
#2996926
12/20/21 07:10 AM
12/20/21 07:10 AM
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Joined: May 2004
Posts: 12,387 Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,387
Taxes & Virus's R-US, NY
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With a girdle they hold up nicely if you keep the rpm in check. Keep repeating that if it makes you feel better, but that girdle plate does not hurt anything, nor does it help anything. Feel free to post a FEA simulations to make me see the advantage they provide. Why would I post FEA simulations? We have this same setup still running and racing in the same cars since 2010? Thousands of passes on them. And even if I did have data like that, people like you still would not believe it anyways.And you can't prove it does anything but add weight, so to each there own, but I have seen a lot of +.030 440's blow up at the drags that didn't have a big arm in them and no girdle. SO in my mind, we have the data, even if its not in the form you require.,
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Re: aluminum wedge block ( RB)
[Re: JACK1440]
#2997552
12/22/21 11:49 AM
12/22/21 11:49 AM
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Joined: Jan 2003
Posts: 9,996 Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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Weighing in on the girdle thing with my experience. In 2003 I dynoed a megablock 4.15 stroke 4.50 bore 528 cube motor. Made 847 hp injected on methanol . I noticed cap walk on a crossbolted megablock, Max rpm was 7400. Bob weight 2432. I put a girdle on it. Didn't take away the cap walk issue. During this time we found a minor cracking the crank by #6. I bought a rather expensive center weighted crank from Crower and took the girdle off. The C. W. Crank eliminated about 90 percent of the cap walk. I finally needed a little cleanup and align hone in 2019. So IMHO the girdle basically can force a large portion of any movement into a vertical motion, which may help a little. BUT THERE IS NO TRIANGULATION to stop that vertical stress completely. So end result? IMHO they may be of some benefit, but not enough for a lot of stressfully builds. Properly done, an add on girdle would be 3 inch or more tall, or thick, if that is how you would view it. That would require a rather short oil pan, like a dragster 10 qt . The big deal about it being so tall is it would now be so rigid it could transfer stress to the pan rails in all directions, not just lateral.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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