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What size Big Block #1142802
12/24/11 12:16 AM
12/24/11 12:16 AM
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Hilltown Pa
1967dartgt Offline OP
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1967dartgt  Offline OP
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What can you build with a stock 400 block and 4.15 crank? What is the max size you can build?


Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: What size Big Block [Re: 1967dartgt] #1142803
12/24/11 12:21 AM
12/24/11 12:21 AM
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junction city oregon
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viperblue72 Offline
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junction city oregon
Why bore any larger than necessary? The popular bore size is 4.375 for 499 cubes. Or 4.25 stroke with 2.2 journal for 511 cubes.

Re: What size Big Block [Re: viperblue72] #1142804
12/24/11 12:24 AM
12/24/11 12:24 AM
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Posts: 3,978
Hilltown Pa
1967dartgt Offline OP
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1967dartgt  Offline OP
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Big bores make more power...


Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: What size Big Block [Re: 1967dartgt] #1142805
12/24/11 12:32 AM
12/24/11 12:32 AM
Joined: Nov 2010
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tn
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robnbird Offline
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figure for yourself. .7854xborexborexstrokex8= however 4.375 bore and 4.150 is enough to stay safe.

6981811-mocar.jpg (61 downloads)
Re: What size Big Block [Re: 1967dartgt] #1142806
12/24/11 01:58 AM
12/24/11 01:58 AM
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Bend,OR USA
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Cab_Burge Offline
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Quote:

What can you build with a stock 400 block and 4.15 crank? What is the max size you can build?


I take it your talking about a BB tall deck 4.15 stroke crank and not a low deck, if so whne you send it out to have the mains turned and the counterweights cut down have them offset grind the rods to either 4.25 or 4.300 stroke with BB chevy rod journla sizes (2.100) You won't have to grind as much in the block to clear the H beam BB Chevy rods like you will with the stock Mopar size rods, no matter what length I have two 400 blocks, one with a 4.300 stroke and the other one is 4.25 stroke both motors make awesome power and unbeilevable toruqe I've built all kinds of stroker BB and the 4.25 and 4.300 are my favorites in a stock block


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
Re: What size Big Block [Re: 1967dartgt] #1142807
12/24/11 09:13 AM
12/24/11 09:13 AM
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440Jim Offline
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I wouldn't limit the stroke to 4.15 if you are trying to maximize cubic inches. The 4.250" stroke cranks with 2.2 rod journals fit better and give more CID. And as CAB said, you can have a 4.3x stroke made and it still fits pretty easy. Going all the way to 4.5" gets tough in a low deck (400) block, but fits the RB (440) block easier.

As for bore size, the most common (for good reason) is 4.375". You could go to 4.380" with little difference. The limiting factor, IMO, is the durability when the cylinder walls get thin. So sonic check the wall thickness and only go as big as needed, not as big as possible.

4.375x4.375x3.14159265/4x8x4.250 = 511.12 CID
4.380x4.380x3.14159265/4x8x4.250 = 512.29 CID
4.380x4.380x3.14159265/4x8x4.300 = 518.32 CID
4.380x4.380x3.14159265/4x8x4.375 = 527.36 CID

Re: What size Big Block [Re: 440Jim] #1142808
12/24/11 10:48 AM
12/24/11 10:48 AM
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Posts: 3,978
Hilltown Pa
1967dartgt Offline OP
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Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and saw his 4.15 crank and just wondered how big of size it could be.

Last edited by 1967DartGT; 12/24/11 10:36 PM.

Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: What size Big Block [Re: 1967dartgt] #1142809
12/24/11 11:34 AM
12/24/11 11:34 AM
Joined: Jun 2010
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LONG ISLAND
fishy340 Offline
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hey Brad i know where theres a set of brand new heads the good victor ones,if he doesnt already have heads.

Re: What size Big Block [Re: 1967dartgt] #1142810
12/24/11 12:10 PM
12/24/11 12:10 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
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Quote:

Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and say his 4.15 crank and just wondered how big of size it could be.




should be to hard...lol Most guys run the 471-472ish kit. They seem to run real good. Buddy ran mid 9's in an all steel 3300lb+ duster before going to the 500inch low deck, he was in the 9.20's this year. Not bad for an old foot brake car.


[IMG]http://i66.tinypic.com/pui5j.jpg[/IMG]
Coming soon!!!!
Re: What size Big Block [Re: 1967dartgt] #1142811
12/24/11 03:43 PM
12/24/11 03:43 PM
Joined: Aug 2006
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junction city oregon
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viperblue72 Offline
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Quote:

Big bores make more power...





Not when its a tradeoff for cylinder rigidity. Not to mention less overheating trouble.

Re: What size Big Block [Re: 1967dartgt] #1142812
12/24/11 04:06 PM
12/24/11 04:06 PM
Joined: Jan 2003
Posts: 16,916
NC
440Jim Offline
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Quote:

Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and say his 4.15 crank and just wondered how big of size it could be.


The typical 4.15 stroke sizes:

4.375x4.375x3.14159265/4x8x4.150 = 499.1 CID
4.380x4.380x3.14159265/4x8x4.150 = 500.2 CID

And in a 440 block you see 4.320+0.030" bore = 4.350"
4.350x4.350x3.14159265/4x8x4.150 = 493.4 CID


Re: What size Big Block [Re: fishy340] #1142813
12/24/11 10:34 PM
12/24/11 10:34 PM
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt Offline OP
master
1967dartgt  Offline OP
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Hilltown Pa
Quote:

hey Brad i know where theres a set of brand new heads the good victor ones,if he doesnt already have heads.




No he's got a set of Indy sr's.


Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: What size Big Block [Re: viperblue72] #1142814
12/24/11 10:44 PM
12/24/11 10:44 PM
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt Offline OP
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He says it ran 146 mph last year in the quarter.It was a 499 10 to 1 compression 700+ lift but less then 800 with the indy sr non max wedge in a 3300 lb dart. I think he was streching the truth some what do you guys think. Isn't that like 750hp to run that fast ib that car? From some of the post about big block it doesn't seem like thats what you guy get out of them.


Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: What size Big Block [Re: Mr.Yuck] #1142815
12/24/11 10:47 PM
12/24/11 10:47 PM
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt Offline OP
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Quote:

Quote:

Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and say his 4.15 crank and just wondered how big of size it could be.




should be to hard...lol Most guys run the 471-472ish kit. They seem to run real good. Buddy ran mid 9's in an all steel 3300lb+ duster before going to the 500inch low deck, he was in the 9.20's this year. Not bad for an old foot brake car.




Its funny I never see these big blocks run those numbers at the track. Well at least a street car that is, I do see gutted out ones run some mid nines.

Last edited by 1967DartGT; 12/24/11 10:48 PM.

Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: What size Big Block [Re: 1967dartgt] #1142816
12/24/11 11:34 PM
12/24/11 11:34 PM
Joined: Feb 2005
Posts: 20,116
PA.
pittsburghracer Online work
"Little"John
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Quote:

Quote:

Quote:

Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and say his 4.15 crank and just wondered how big of size it could be.




should be to hard...lol Most guys run the 471-472ish kit. They seem to run real good. Buddy ran mid 9's in an all steel 3300lb+ duster before going to the 500inch low deck, he was in the 9.20's this year. Not bad for an old foot brake car.




Its funny I never see these big blocks run those numbers at the track. Well at least a street car that is, I do see gutted out ones run some mid nines.




It might need some nos, naz, laughing gas, HP helper, spray, NITROUS.


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




Re: What size Big Block [Re: pittsburghracer] #1142817
12/25/11 01:09 AM
12/25/11 01:09 AM
Joined: Oct 2007
Posts: 3,978
Hilltown Pa
1967dartgt Offline OP
master
1967dartgt  Offline OP
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Posts: 3,978
Hilltown Pa
Quote:

Quote:

Quote:

Quote:

Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and say his 4.15 crank and just wondered how big of size it could be.




should be to hard...lol Most guys run the 471-472ish kit. They seem to run real good. Buddy ran mid 9's in an all steel 3300lb+ duster before going to the 500inch low deck, he was in the 9.20's this year. Not bad for an old foot brake car.




Its funny I never see these big blocks run those numbers at the track. Well at least a street car that is, I do see gutted out ones run some mid nines.




It might need some nos, naz, laughing gas, HP helper, spray, NITROUS.




Yea I agree those big blocks need the naz to run a number.


Brett Miller W9 cnc'd heads
STR Chassis fabraction
Re: What size Big Block [Re: 1967dartgt] #1142818
12/26/11 03:55 PM
12/26/11 03:55 PM
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck Offline
Not enough dumb comments...yet
Mr.Yuck  Offline
Not enough dumb comments...yet

Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Quote:

Quote:

Quote:

Thanks I have a buddy building a big block to try and run down my small block. I know he has a 400 block and was just at his engine builder and say his 4.15 crank and just wondered how big of size it could be.




should be to hard...lol Most guys run the 471-472ish kit. They seem to run real good. Buddy ran mid 9's in an all steel 3300lb+ duster before going to the 500inch low deck, he was in the 9.20's this year. Not bad for an old foot brake car.




Its funny I never see these big blocks run those numbers at the track. Well at least a street car that is, I do see gutted out ones run some mid nines.




They only S/B's I see come close to that are using 2 stages of juice...lol His car runs good, but it's not a street car. It has 2 glass seats and no back seat. He's also or was close to 280. It's tubbed and has big stickies out back, not sure of the size. He broke a rod last race of the season so he's going bigger next year 540 I think. Everything the same except more cubes. Not sure but I think he's running like a 690something solid roller.

Re: What size Big Block [Re: Mr.Yuck] #1142819
12/27/11 11:22 PM
12/27/11 11:22 PM
Joined: Jan 2007
Posts: 437
south central pa
bdaz smblk Offline
mopar
bdaz smblk  Offline
mopar

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Posts: 437
south central pa
Mr.Yuck if you are talking about Bill's blue demon it is a 499 with a 670 lift roller.He bought the motor out of my brothers full interior 30x10 tire 69 dart with mufflers and went 9.30's at 146.And 1967dart gt if you never see a street car with a big block run good you need to get out to different tracks more often.Not saying they are everywhere but there are some good running ones out there floating around.


3120lb, small block, 10.5" tire, NA, through exhaust, full int, WITH 83/4 REAR, 9.0 at 150mph
Re: What size Big Block [Re: 1967dartgt] #1142820
12/28/11 12:26 AM
12/28/11 12:26 AM
Joined: Oct 2004
Posts: 1,327
south central,Pa
mopar_to_ya Offline
pro stock
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pro stock

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south central,Pa
Quote:

Yea I agree those big blocks need the naz to run a number




Maybe if you build it, it would need a power adder, or a big block chevy! From what I understand, you got a 400 plus cu in, w-9 motor going on av 10.0's in an abody at a sea-level track.
And as bdazz smblk(aka; my Brother) says. You might wanna get out more often yo some diff tracks. And btw, that motor isn't anything special at all!!!!

have a nice day

6987657-MIRNov20082.jpg (37 downloads)
Re: What size Big Block [Re: mopar_to_ya] #1142821
12/28/11 12:54 AM
12/28/11 12:54 AM
Joined: Apr 2011
Posts: 319
jonestown,pa
D
dmking Offline
enthusiast
dmking  Offline
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Posts: 319
jonestown,pa
dear mr small block. stock crank 440 with old small indy heads that flow less than some small block indy heads. 262/265cam 630lift solid low 10s. with out having to buy special for these heads parts.

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