700 CI. BBF

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700 CI. BBF

Post  KEVIN S on May 16th 2011, 11:02 am

I am relatively new to BBF's so I am wondering why we do not see more 706's or 700+ cid. BBF combos? There are several 706 bbc around here. To build a BBF this large I assume you would need a 11.2 or 11.7 D.H. block and big heads. Besides cost are there any concerns that are specific to bbf's this big? Does anyone have a 706 with thors or something similar and willing to share specs or experience on the build? I just think using an aluminum block, aluminum rods, and billet crank the cost difference on a 632(10.32) to 706(11.?0) would be minimal. If I use similar top end (Thor heads and sheet metal intake)and dry sump parts on both I figure the cost would similar too. Advise or comments?

Thanks Everyone
Kevin S.

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Re: 700 CI. BBF

Post  dfree383 on May 16th 2011, 11:05 am

Mostly 598-604 stuff around because of cost.

Once to get past the production type stuff limits might as well just build a 821, for the same reasons that you've alread mentioned.

With that in mind, it takes alot of chassis, that most of us don't have to hold onto anything more than a 598 !!! More $$$ LOL

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Re: 700 CI. BBF

Post  KEVIN S on May 16th 2011, 11:14 am

I am just inquiring. I have Thor heads and was just wondering if anyone had a Thor headed 706ish N2O setup and if this is doable? I figure you couldn't/wouldn't want to go that big (800+) with a 4.9 bs and Thor Heads with nitrous. That would be a very large stroke. What D.H. block would be needed for a 706? 11.20 or 11.70?

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Re: 700 CI. BBF

Post  dfree383 on May 16th 2011, 11:18 am

The taller the better to get a decent (or Most) rod ratio in it. Plus Ring Pack.

The 800" stuff is normaly on the wider bore spacing stuff, so your right probably not for thors.

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Re: 700 CI. BBF

Post  Lem Evans on May 16th 2011, 11:39 am

11.7" to go 700" +

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Re: 700 CI. BBF

Post  KEVIN S on May 16th 2011, 11:53 am

Lem Evans wrote:11.7" to go 700" +

Thanks, Have you done this deal before? I have seen several 632's with Thors and nitrous I am just looking to see how much I would have to do differently to do the 700+. I was thinking 5.25 stroke and 11.7 block. I guess my question is besides the price of the parts are there any BBF specific issues with is. I am just tossing around ideas right now but I need to buy a block soon. I wanted to see if there where any road blocks with doing a bbf like this that maybe I am not seeing before I start making calls.

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Re: 700 CI. BBF

Post  Lem Evans on May 16th 2011, 1:31 pm

The biggest one I've had was a 665".......4.6 x 5.00"........11.200" deck ht.

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Re: 700 CI. BBF

Post  Frank Merkl on May 17th 2011, 2:14 pm

Just putting my 712 together 5.300 bryant billet crank , 11.200 AR aluminum Block 7.190 long Venolia rods , 4.625 bore Venolia pistons , A441 hemi heads , Greg Davis sheet aluminum Tunnel ram, 4 -2.200 bore CFM split Domi's , 4 sets of Fogger Nozzles
it should ROCK!!
Frank

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Re: 700 CI. BBF

Post  res0rli9 on May 17th 2011, 2:21 pm

Frank Merkl wrote:Just putting my 712 together 5.300 bryant billet crank , 11.200 AR aluminum Block 7.190 long Venolia rods , 4.625 bore Venolia pistons , A441 hemi heads , Greg Davis sheet aluminum Tunnel ram, 4 -2.200 bore CFM split Domi's , 4 sets of Fogger Nozzles
it should ROCK!!
Frank

YEH! cheers Lets ROCK AND ROLL Cool

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Re: 700 CI. BBF

Post  Bernie on May 18th 2011, 10:22 am

Frank Merkl wrote:Just putting my 712 together 5.300 bryant billet crank , 11.200 AR aluminum Block 7.190 long Venolia rods , 4.625 bore Venolia pistons , A441 hemi heads , Greg Davis sheet aluminum Tunnel ram, 4 -2.200 bore CFM split Domi's , 4 sets of Fogger Nozzles
it should ROCK!!
Frank

And you run this in the Hat? I might just make a road trip this summer.



SIR? i doubt it, not a very good rep.

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Re: 700 CI. BBF

Post  rmcomprandy on May 18th 2011, 10:29 am

You can build a 648 in a stock deck height $2,500.00 block ... the raised deck height blocks are several thousand dollars more. It takes awful deep pockets for this difference to be considered MINIMAL; much less costing the rest of the parts.

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Re: 700 CI. BBF

Post  KEVIN S on May 18th 2011, 10:30 am

Frank Merkl wrote:Just putting my 712 together 5.300 bryant billet crank , 11.200 AR aluminum Block 7.190 long Venolia rods , 4.625 bore Venolia pistons , A441 hemi heads , Greg Davis sheet aluminum Tunnel ram, 4 -2.200 bore CFM split Domi's , 4 sets of Fogger Nozzles
it should ROCK!!
Frank


Very nice build Frank. Have you run this combination for awhile or is it new? I am just wondering about reliability on these motors. I have no problem with staying on top of maintenance and service. What kind of rpm's do you expect or see?


Last edited by KEVIN S on May 18th 2011, 2:52 pm; edited 1 time in total

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Re: 700 CI. BBF

Post  KEVIN S on May 18th 2011, 10:46 am

rmcomprandy wrote:You can build a 648 in a stock deck height $2,500.00 block ... the raised deck height blocks are several thousand dollars more. It takes awful deep pockets for this difference to be considered MINIMAL; much less costing the rest of the parts.

I was comparing the cost of the aluminum 10.3 to 11.2/11.7 blocks. I believe there was like a 3 hundered dollar difference. The billet cranks and rods should cost the same. There maybe a few hundered difference on each of the above but I was quoted the same price. I agree that an a460 block is cheaper than an aluminum but I dont want a 300 pound block. I am just looking for builds and advise. It seems like the only down side is the price difference but an apples to apples comparison seems similar. I guess everyone has differnent ideas of what is similar though. Thanks to all Kevin S.

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Re: 700 CI. BBF

Post  Lem Evans on May 18th 2011, 11:41 am

I know you want an aluminium block but I'd like to make the point that a prepared A460 block is not near 300#.
This is what is bored out of the blocks at 4.600"..........34#



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Re: 700 CI. BBF

Post  dfree383 on May 18th 2011, 1:13 pm

Their are some strenght considerations and HP differences on Iron vs Aluminum too.

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