Re: 400 block
[Re: dart games]
#2991735
12/03/21 05:06 PM
12/03/21 05:06 PM
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Joined: Aug 2008
Posts: 4,049 Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,049
Mo.
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ive had a 540 stroker out of a 400 block.which someday ill build another,it had a 4.500 crank,and bme aluminun rods,6.53 How is that holding up in a race application ?
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Re: 400 block
[Re: cesar perez]
#2991870
12/03/21 11:55 PM
12/03/21 11:55 PM
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Joined: Aug 2003
Posts: 43,007 Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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What size rod journals on the crank? I would and due put aluminum main caps and AARP main studs on all the 400 stroker motors I build and use Forget the girdles, they are a waste of money and give you a false since of security and hope
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 400 block
[Re: Cab_Burge]
#2992148
12/05/21 06:37 AM
12/05/21 06:37 AM
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Joined: Dec 2006
Posts: 4,647 aotearoa
rebel
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master
Joined: Dec 2006
Posts: 4,647
aotearoa
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[quote=Cab_Burge Forget the girdles, they are a waste of money and give you a false since of security and hope [/quote] what are you not seeing as a strong point with a cap n girdle kit Cab? These BCR units look awesome. Caps that fit snug between the webs, A girdle that mounts further out than the main studs for even more rigidity & is 1/2" thick. I'd be more inclinded to go this way than alloy caps.
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Re: 400 block
[Re: rebel]
#2992219
12/05/21 12:18 PM
12/05/21 12:18 PM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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That engine looks familiar That is my 400 500" stroker that the machine shop overbalanced adding weight the the front crank throw. discolaration on crank throw from where they welded the weight in. After running engine like that for a few races, I pulled it back apart and had the crank re-balanced where they removed the weight the other shop added. After that episode, I bought a good scale and rod balance fixture to verify the balance on the other 440 source stroker kits which were OK. The BCR caps and girdle are nice. The machining cost to install them is not cheap. Align bore/hone the crank bore, and mill the block/caps level was almost the cost of the cap/girdle kit. I also had to make a custom 1/2" oil pickup, but it ended up basically just a straight tube welded to an old milodon pickup cup/screen, Using the milodon low profile 7-quart oil pan from my old 451 stroker engine.
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Re: 400 block
[Re: Cab_Burge]
#2992506
12/06/21 10:55 AM
12/06/21 10:55 AM
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Joined: Nov 2020
Posts: 348 Isle of Sheeps
Gtxxjon
enthusiast
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enthusiast
Joined: Nov 2020
Posts: 348
Isle of Sheeps
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Hi Cesar, how is the weather in Florida? Last time I was there in December 2010 it was snowing lol. Snowing here now so I’m thinking of coming over ASAP. Best Mopar block is the 71-72 400 casting. So a great place to start for a stroker. My Moparmate ran a 4.500 crank in his 400, it was over 1000hp... Yes if it’s a long lasting block it has to be after market 4 bolt mains. I’m sure Ali caps are a bonus and a girdle too. We have used the 4 bolt STEEL ‘program’ caps for nearly twenty years! Lots of machine work and hard to find good machine shops now...
Last edited by Gtxxjon; 12/06/21 10:56 AM.
Carpe diem, quam minimum credula postero, thanx Horace!
There’s no point trying to fix stuff that ain’t broke,,, 'but if ain’t broke',,, you is not trying hard enough...
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Re: 400 block
[Re: 440_Offroader]
#2992792
12/07/21 03:28 AM
12/07/21 03:28 AM
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Joined: May 2008
Posts: 5,399 Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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There is a bit of clearance between the side of the cap and block, but the block casting was cleaned up also. With the oil pan gasket, you can't see the nuts bolting the girdle to the block. The girdle holes for the oil pan studs are counter-bored so the nuts are below the oil pan gasket. Because the oil pan rail and caps are milled flat, the girdle is right on top of the caps, and the caps bolted to the girdle on the outer wedge part of the caps (along with the normal main cap studs.) More pictures on the web site: https://www.bcrproducts.com/caps_and_girdle_system.htmlAfter doing all the mods to the stock block, the costs started getting up there (around $1,600 for the caps, girdle, and machine work), but still way less than an aftermarket block which are around $5,000 these days. https://www.manciniracing.com/engineblocks.htmlhttps://billmitchellproducts.com/product-category/engine-blocks/mopar-big-block-2/
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Re: 400 block
[Re: 451Mopar]
#2994823
12/13/21 12:49 AM
12/13/21 12:49 AM
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Joined: Jan 2003
Posts: 9,963 Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,963
Frostbitefalls MN (Rocky&Bullw...
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The girdles may provide some lateral stability but darn little virticle. Look at the block structure of the latest performance engines. Deep skirted blocks that do something. If I was going to build a girdle it would have a very tall structure , like three inch or maybe even more. Rather impractical though, hanging a three to four inch tall girdle on the block to transfer more of the load to the pan rail, which might not be strong enough to hold up . But it would help resist virtical forces a lot.
Last edited by gregsdart; 12/13/21 12:52 AM.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 400 block
[Re: cesar perez]
#2995206
12/14/21 11:06 AM
12/14/21 11:06 AM
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Joined: Sep 2021
Posts: 20 SWFL
Tie Rod Garage
member
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member
Joined: Sep 2021
Posts: 20
SWFL
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Whats the largest crank I can put in a 400 block with aluminum rods. Do u guys thing that it would help block from breaking with grittle and aluminum caps If you decide to use the girdle and aluminum cap set up, Laz at Mesa Balancing did the machine work on my RB stroker with the the BCR parts. the only thing I can complain about is cap growth and low oil pressure if i let the idle go below 800 rpm. i did change to a Milodon 21814 pump which helped some. Oil pressure over 900 rpm or cold any rpm is fine.
1941 Dodge WC, 493 cid twin turbo FAST XFI 2002 Dakota R/T RC
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Re: 400 block
[Re: Tie Rod Garage]
#2995230
12/14/21 12:22 PM
12/14/21 12:22 PM
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Joined: Mar 2003
Posts: 9,092 Rogue River, OR
Jeremiah
master
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master
Joined: Mar 2003
Posts: 9,092
Rogue River, OR
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Whats the largest crank I can put in a 400 block with aluminum rods. Do u guys thing that it would help block from breaking with grittle and aluminum caps If you decide to use the girdle and aluminum cap set up, Laz at Mesa Balancing did the machine work on my RB stroker with the the BCR parts. the only thing I can complain about is cap growth and low oil pressure if i let the idle go below 800 rpm. i did change to a Milodon 21814 pump which helped some. Oil pressure over 900 rpm or cold any rpm is fine. Do you know what the main bearing clearances were set at?
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