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Hey How many rpms do big blocks turn #355880
06/23/09 05:41 PM 06/23/09 05:41 PM
Joined: Jan 2007
Posts: 3,695
nc
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emarine01 Offline OP
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emarine01  Offline OP
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What are some of you big block guys turning? factory blocks < no lies please>

Re: Hey How many rpms do big blocks turn [Re: emarine01] #355881
06/23/09 06:16 PM 06/23/09 06:16 PM
Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing Offline
master
Dunnuck Racing  Offline
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Posts: 3,300
Northern Indiana
Mine traps about 6800 to 7000. I shift it at 6500.Stock forged crank,stock caps,Milodon main bolts.
I know a couple of other racers who are about the same.
One friend of mine recently broke a crank in his,and went to 4 bolt caps and an aftermarket crank.
Alot of guys get many years with stock stuff,but you never know.

www.dunnuckracing.com
Re: Hey How many rpms do big blocks turn [Re: emarine01] #355882
06/23/09 06:31 PM 06/23/09 06:31 PM
Joined: Jun 2009
Posts: 644
Minnesota
Barnstorm Offline
mopar
Barnstorm  Offline
mopar

Joined: Jun 2009
Posts: 644
Minnesota
7400-7600 depending on the air. 500 mega block C&A rods..CP pistons..440-1..2.25-1.81 valves..741 cam K1000h springs..1150 dom.

5310978-mopar_resize.jpg (100 downloads)
The little old lady from Pasadena is back!
Re: Hey How many rpms do big blocks turn [Re: Dunnuck Racing] #355883
06/23/09 06:32 PM 06/23/09 06:32 PM
Joined: Jan 2007
Posts: 3,695
nc
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emarine01 Offline OP
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emarine01  Offline OP
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So stock small blocks and stock big blocks spin around the same speed

Re: Hey How many rpms do big blocks turn [Re: emarine01] #355884
06/23/09 06:33 PM 06/23/09 06:33 PM
Joined: Jan 2005
Posts: 1,774
Keymar, MD
DusterKid Offline
top fuel
DusterKid  Offline
top fuel

Joined: Jan 2005
Posts: 1,774
Keymar, MD
shift at 6000 go thru about 6300-6400. 1966 Block, 1967 crank, rods and pistons...All hardware is basic, except ARP rod bolts.
Re: Hey How many rpms do big blocks turn [Re: emarine01] #355885
06/23/09 06:51 PM 06/23/09 06:51 PM
Joined: Mar 2007
Posts: 3,300
Northern Indiana
Dunnuck Racing Offline
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Dunnuck Racing  Offline
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Northern Indiana
Quote:

So stock small blocks and stock big blocks spin around the same speed



I should add that this is with aftermarket rods,light pistons and a good balance job.

www.dunnuckracing.com
Re: Hey How many rpms do big blocks turn [Re: Dunnuck Racing] #355886
06/23/09 06:58 PM 06/23/09 06:58 PM
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Posts: 3,695
nc
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emarine01 Offline OP
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My small block has similar bottom end parts and turns around the same rpms , It appears there is not much difference in shaft speeds between big and small blocks

Re: Hey How many rpms do big blocks turn [Re: emarine01] #355887
06/23/09 07:28 PM 06/23/09 07:28 PM
Joined: May 2008
Posts: 1,238
North Cackilacky
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sdaurity Offline
pro stock
sdaurity  Offline
pro stock
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Joined: May 2008
Posts: 1,238
North Cackilacky
I use to turn my 3.600 stroke lowdeck 8600 every pass for one season, before the crank went south at the last race of the year. Stock 76 block with alum. main caps.

One day I will have something cool here.
Re: Hey How many rpms do big blocks turn [Re: sdaurity] #355888
06/23/09 07:34 PM 06/23/09 07:34 PM
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Posts: 3,695
nc
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emarine01 Offline OP
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emarine01  Offline OP
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How do big blocks run on cyl wall thickness, are they as hit or miss as small blocks , are the castings thicker per unit of bore dia? How hard is it to install cross bolted main caps in a b engine?
Re: Hey How many rpms do big blocks turn [Re: emarine01] #355889
06/23/09 08:29 PM 06/23/09 08:29 PM
Joined: Jan 2003
Posts: 4,243
Canada
Kam*Kuda Offline
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Kam*Kuda  Offline
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Canada
Quote:

How do big blocks run on cyl wall thickness, are they as hit or miss as small blocks , are the castings thicker per unit of bore dia? How hard is it to install cross bolted main caps in a b engine?


Wall thick, yes, They are hit and miss. Plenty of chances for core shift here too

1970 Barracuda Convertible
1968 Satellite Street Strip car
1654.5 Mustang
1955 Land Rover
Re: Hey How many rpms do big blocks turn [Re: Kam*Kuda] #355890
06/23/09 08:40 PM 06/23/09 08:40 PM
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Posts: 3,695
nc
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emarine01 Offline OP
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I guess you guys see where this post is heading , been pricing out race blocks today and for the bucks a 451 B engine build sounds hard to beat , I just assumed there was a rpm advantage to small blocks but once ya add a little stroke it all seems to even out, lots of good reading on B engine builds just never looked till now

Re: Hey How many rpms do big blocks turn [Re: emarine01] #355891
06/23/09 08:47 PM 06/23/09 08:47 PM
Joined: Jun 2003
Posts: 52,972
Romeo MI
MR_P_BODY Offline
Master
MR_P_BODY  Offline
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Romeo MI
Quote:

I guess you guys see where this post is heading , been pricing out race blocks today and for the bucks a 451 B engine build sounds hard to beat , I just assumed there was a rpm advantage to small blocks but once ya add a little stroke it all seems to even out, lots of good reading on B engine builds just never looked till now




Its just the way you build them and with the right
parts. I'm in the process of building a 514 BB that
I expect to turn to 9000... good balance and light
parts
Re: Hey How many rpms do big blocks turn [Re: MR_P_BODY] #355892
06/23/09 09:02 PM 06/23/09 09:02 PM
Joined: Jan 2007
Posts: 3,695
nc
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emarine01 Offline OP
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emarine01  Offline OP
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In the past I was only intrested in Hp per cubic inch , now days It seems Hp per cubic dollar has to be factored in also

Re: Hey How many rpms do big blocks turn [Re: emarine01] #355893
06/23/09 09:45 PM 06/23/09 09:45 PM
Joined: May 2007
Posts: 430
New Hampshire
n_bogie1984 Offline
mopar
n_bogie1984  Offline
mopar

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Posts: 430
New Hampshire
we have turned a factory crank and ly rods to 9800 rpms, currently i turn my 4.15 stroke h beamed 440 to about 8300 all season long
Post deleted by Defbob [Re: n_bogie1984] #355894
06/23/09 11:16 PM 06/23/09 11:16 PM

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Re: Hey How many rpms do big blocks turn #355895
06/23/09 11:22 PM 06/23/09 11:22 PM
Joined: Jan 2003
Posts: 19,372
Las Vegas
Al_Alguire Offline
I Live Here
Al_Alguire  Offline
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Posts: 19,372
Las Vegas
Mine is not a factory block but when I run all out I shift at 8300rpm, unfortunatly I cross the line at only 7550 due to wrong gear. Will get that fixed someday, for now we shift at .5 from the release of the button, which would be a stunning mind numbing 4600rpm

"I am not ashamed to confess I am ignorant of what I do not know."

"It's never wrong to do the right thing"
Re: Hey How many rpms do big blocks turn [Re: emarine01] #355896
06/24/09 12:49 AM 06/24/09 12:49 AM
Joined: Aug 2003
Posts: 43,219
Bend,OR USA
C
Cab_Burge Online work
I Win
Cab_Burge  Online Work
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Posts: 43,219
Bend,OR USA
My 400 block with a 4.300 stroke and 6.800 long CAT H beam steel rods, CNC ported Edelbrock heads and a Comp Cams solid roller shify at 7000 to 7300 depending on the track elevation

Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: Hey How many rpms do big blocks turn [Re: Cab_Burge] #355897
06/24/09 02:26 AM 06/24/09 02:26 AM
Joined: Jan 2003
Posts: 27,421
Balt. Md
3
383man Offline
Too Many Posts
383man  Offline
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Balt. Md
Wow some of you really twist them bigblocks ! The 440 in my 63 is a stock shortblock with KB quench pad pistons so I could get quench with the factory 906 heads I run. That way it runs good on 92 pump at 10.0. I shift between 6000 and 6200 and trap around 6400 according to my tach. I guess the aftermarket heads wake them up more then I realized as I have never ran nothing but stock heads. But now that I am single I plan to build a nice aluminum head eng soon. Ron
Re: Hey How many rpms do big blocks turn [Re: 383man] #355898
06/24/09 02:36 AM 06/24/09 02:36 AM
Joined: Dec 2006
Posts: 3,667
Arizona
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Chris'sBarracuda Offline
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Arizona
Some years ago, Gecker had 452" and 471" low deck B1's that routinely went 8000+ in 400 blocks.. He had these in his Omni/Charger and Daytona..

Saw it with my own peepers.. Did he have failures?? Yep.. But not very many..
His worst engine failures were in the Hemi..
Very few with the low decks..



Chris..

Re: Hey How many rpms do big blocks turn [Re: 383man] #355899
06/24/09 06:29 AM 06/24/09 06:29 AM
Joined: May 2007
Posts: 430
New Hampshire
n_bogie1984 Offline
mopar
n_bogie1984  Offline
mopar

Joined: May 2007
Posts: 430
New Hampshire
Quote:

Wow some of you really twist them bigblocks ! The 440 in my 63 is a stock shortblock with KB quench pad pistons so I could get quench with the factory 906 heads I run. That way it runs good on 92 pump at 10.0. I shift between 6000 and 6200 and trap around 6400 according to my tach. I guess the aftermarket heads wake them up more then I realized as I have never ran nothing but stock heads. But now that I am single I plan to build a nice aluminum head eng soon. Ron



from past experiance do not turn kb hypertechs above 7100-7200 or you will be picking pistons out of the pan

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