Re: Small Block vs Big Block
[Re: WHITEDART]
#2621694
02/15/19 02:54 PM
02/15/19 02:54 PM
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Joined: Jan 2003
Posts: 19,367 Las Vegas
Al_Alguire
I Live Here
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I Live Here
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Not many 1100Hp 400" Big blocks out there. Quite a few 1100hp small blocks out there, just saying. Also FWIW other makes have SB stuff that is a wider bore space they can work with as well.
"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: Small Block vs Big Block
[Re: Al_Alguire]
#2621698
02/15/19 03:08 PM
02/15/19 03:08 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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Washington
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Not many 1100Hp 400" Big blocks out there. Quite a few 1100hp small blocks out there, just saying. Also FWIW other makes have SB stuff that is a wider bore space they can work with as well. Yep. Just like everything else Chrysler, you're screwed. The bigger bore spacing GM spaced stuff will beat all comers. Are you saying 1100 HP NA stuff using Chrysler architecture? Pretty impressive.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Small Block vs Big Block
[Re: madscientist]
#2621915
02/15/19 11:33 PM
02/15/19 11:33 PM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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Are you saying 1100 HP NA stuff using Chrysler architecture? Pretty impressive.
. In Australian Pro Stock the small block Dodge has been at the top.. Bob book has built some pretty impressive ones as well.. there is room in a certain aftermarket block to do a 4 500 inch bore space. Sbm.... and a set of W8 could be manipulated
Last edited by WHITEDART; 02/16/19 12:35 AM.
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2621933
02/15/19 11:58 PM
02/15/19 11:58 PM
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Joined: Sep 2014
Posts: 4,457 Washington
madscientist
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Are you saying 1100 HP NA stuff using Chrysler architecture? Pretty impressive.
. In Australian Pro Stock the small block Dodge has been at the top.. Bob book has built some pretty impressive ones as well.. there is room in a certain aftermarket block to do a 4 500 inch bore space. Sbm.... can a set of W8 could be manipulated I forgot about the down under guys.
Just because you think it won't make it true. Horsepower is KING. To dispute this is stupid. C. Alston
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Re: Small Block vs Big Block
[Re: madscientist]
#2621957
02/16/19 12:39 AM
02/16/19 12:39 AM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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Are you saying 1100 HP NA stuff using Chrysler architecture? Pretty impressive.
. In Australian Pro Stock the small block Dodge has been at the top.. Bob book has built some pretty impressive ones as well.. there is room in a certain aftermarket block to do a 4 500 inch bore space. Sbm.... and a set of W8 could be manipulated I forgot about the down under guys. . Did Chrysler do 4.500 bore space in NASCAR. I want to say it was around the time Sterling Martin was driving the Coors car I thought I read something along those lines. I think it was quickly band if my memory serves me correctly which it rarely does
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2621977
02/16/19 01:55 AM
02/16/19 01:55 AM
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Joined: Feb 2005
Posts: 20,179 PA.
pittsburghracer
"Little"John
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"Little"John
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PA.
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Not many guys have the budget to build some of these engines a few of you are using for examples. High dollar high maintenance stuff for a few races a year
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2622038
02/16/19 10:03 AM
02/16/19 10:03 AM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
Posts: 1,400
Trumbauersville PA
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Are you saying 1100 HP NA stuff using Chrysler architecture? Pretty impressive.
. In Australian Pro Stock the small block Dodge has been at the top.. Bob book has built some pretty impressive ones as well.. there is room in a certain aftermarket block to do a 4 500 inch bore space. Sbm.... and a set of W8 could be manipulated I forgot about the down under guys. . Did Chrysler do 4.500 bore space in NASCAR. I want to say it was around the time Sterling Martin was driving the Coors car I thought I read something along those lines. I think it was quickly band if my memory serves me correctly which it rarely does r6 block is 4.5 BC I'm doing one now, R6P8 Erin Elliot , has gone 1200 with the R5P7 Larry Wallace has had some good luck, And Patterson racing You can take the R5 to 4.250" bore, the steam holes keep you from going any larger….but would you dare…….. best bet is to stop at 4.20/4.22, 4.185X3.75(413CI) Great combo ...for any one who wants to spend the coin.... it will equal any power out put of the same CI RO7/X or SB2 R5 can take a 3.75 stroke and still have cylinder wall length to support a typical piston skirt , a 4.000" stroke will fit, issue there is rod ratio and urber short hockey puck piston……. And it makes for a short lived “race engine” R5 block and P7 heads With 4.310" Nikosil liners and boring the mains to 2.500", to give you some more crank overlap a 467CI is possible and has been done and will make enough power to turn a top fuel Blower at 8k and have a few 100 to spare. With out a doubt the larger the bore the better with a wedge, canted valve and Hemis, don't seam to care as much, less chance of shrouding the valve...one thing we all can agree on is the larger the Intake valve the better.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2622062
02/16/19 12:01 PM
02/16/19 12:01 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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When you change the bore pitch, you shorten the list of inherited characteristics. Like valve size and position, chamber shape, port config. Oh wait - it's everything.
Boffin Emeritus
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Re: Small Block vs Big Block
[Re: polyspheric]
#2622478
02/17/19 10:14 AM
02/17/19 10:14 AM
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Joined: Jan 2003
Posts: 6,142 Melbourne , Australia
LA360
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There would be a point of deminishing returns in regards making the highest hp per cube, I recall it being somewhere in the 3-400 cube range. I can't recall exactly. Whilst a big bore is always better in terms of airflow, it's not the case when it comes to friction. There is a presentation on YouTube about it, one of the Cup guys presented it at a AETC or something similar. Very interesting
Alan Jones
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2622540
02/17/19 03:00 PM
02/17/19 03:00 PM
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Joined: Jan 2003
Posts: 19,367 Las Vegas
Al_Alguire
I Live Here
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I Live Here
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FWIW I had a BB that made 2.64 per cube. Oh did I mention it was a 99/06 Hemi Compared to some of the comp stuff that's just for beginners. I know of more than a few right at 2.8/2.9 that are in the 350-360" range
"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: Small Block vs Big Block
[Re: WHITEDART]
#2622611
02/17/19 05:40 PM
02/17/19 05:40 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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master
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a big bore is always better in terms of airflow... ... and carries with it new problems w/r/t combustion chamber shape, charge energy loss, swirl, quench, mixture direction bias, flame front propagation, etc.
Smaller cylinders with very high B:S ratios make the most power, but the parasitic loads are not scaled, so a 90" V12 isn't as much better as you may suppose.
Boffin Emeritus
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2622756
02/18/19 12:10 AM
02/18/19 12:10 AM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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master
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New York
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I'm sure there are frictional differences between those choices, I'm just not up on them, perhaps someone can help?
Boffin Emeritus
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Re: Small Block vs Big Block
[Re: Al_Alguire]
#2622797
02/18/19 01:38 AM
02/18/19 01:38 AM
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Joined: Oct 2011
Posts: 3,036 bean town ....Ca
WHITEDART
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FWIW I had a BB that made 2.64 per cube. Oh did I mention it was a 99/06 Hemi Compared to some of the comp stuff that's just for beginners. I know of more than a few right at 2.8/2.9 that are in the 350-360" range . I have a goal of 2.55 per cubic inch on the next W8 motor.. obviously dynos very. But 2.55 on the tool that we use is going to be tough
In the 8s N/A.with Brett miller W8's 5.07 at 133 at 2700lb
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2622876
02/18/19 12:34 PM
02/18/19 12:34 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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master
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the long stroke would be at a disadvantage due to the higher rod angularity But... that's rod ratio-dependent? Don't all BBC have short rods (stock 454: 1.53:1)?
Longer stroke would also have higher piston speed, also increasing it's friction. Reduced by the smaller wall contact area?
Boffin Emeritus
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2622900
02/18/19 01:37 PM
02/18/19 01:37 PM
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Joined: Jan 2006
Posts: 1,400 Trumbauersville PA
ric3xrt
pro stock
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pro stock
Joined: Jan 2006
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Trumbauersville PA
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BBC 454 is 1.53 ,BBC 427 and 396 were 1.636 SBC 400 1.466.
Truth has no agenda, but those with an agenda make their own truth. Some of us are so open minded they only see their View
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Re: Small Block vs Big Block
[Re: WHITEDART]
#2622996
02/18/19 05:50 PM
02/18/19 05:50 PM
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Joined: Oct 2007
Posts: 4,206 New York
polyspheric
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Same rod, inherited from the 348 W engine in 1958. 3.76" & 4.00"
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