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Re: 543 440 Combo's
[Re: Cab_Burge]
#2783407
06/09/20 09:02 PM
06/09/20 09:02 PM
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Joined: Jul 2008
Posts: 30,424
Florida STAYcation
dOc !
The village idiot's idiot
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The village idiot's idiot
Joined: Jul 2008
Posts: 30,424
Florida STAYcation
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I've sonic tested 4 stock bore(4.180) 413 truck and industrial block, none of them would go safely above 4.250 bore size in my opinion  I like to have at least .160 wall thickness on both thrust surfaces after boring   Never sonic checked that 413 block myself but I saw an operation ONE BESTER than that ! When I was west side down State Michigan there was a guy I knew who had a BUSTED UP block ...... Who pulled up sections of that block.... I saw areas in the cylinder walls - ON THAT BLOCK - that were near .250 !
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Re: 543 440 Combo's
[Re: dOc !]
#2783441
06/09/20 10:22 PM
06/09/20 10:22 PM
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Joined: Aug 2003
Posts: 43,095
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,095
Bend,OR USA
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4.170+.250=4.420, correct 4.420-.160=4.260, hence me choosing to bore them to standard 426W and 383 bore sizes for pistons and ring choices
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 543 440 Combo's
[Re: dOc !]
#2785796
06/15/20 05:51 PM
06/15/20 05:51 PM
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Joined: Jun 2004
Posts: 741
Carson City, NV
440sourcedotcom
super stock
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super stock
Joined: Jun 2004
Posts: 741
Carson City, NV
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I’m not sure which combo the “543” is.
4.375 x 4.500 is 541.2
4.380 x 4.500 is 542.4
4.500 x 4.250 is 540.7
4.440 x 4.375 is 541.9 Our 543 kit is a 4.500 stroke x 4.380" bore, which equals 542.43 cubic inches. We offer pistons for that kit in .060" over, so we usually rate the cubic inches at the largest available bore size. And we did round up by .57 hundredths of a cubic inch. Which block do you recommend? Any consideration on the industrial 413,block ? What’s the minimum wall thickness? Do you offer an assembled short block ? Most all blocks are the same and work great. If you haven't read it, check out our article on engine blocks here: http://www.440source.com/blockinfo.htmWe've found the 413 industrial blocks to have very thick cylinder walls (over .400") so they usually support boring out to a 440 size. But you should always sonic check the specific block you are using, and make sure it has enough thickness. The factory "spec" for cylinder wall thickness is .250". We usually don't like to see less than .180" or so.
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Re: 543 440 Combo's
[Re: Dragula]
#2807469
08/10/20 09:37 PM
08/10/20 09:37 PM
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Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
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The one i posted about earlier in this thread was actually a 426 wedge block bored .100 to 4.350 and a stock rod journal size of 2.375 using 6pak rods and a 4.500 stroke. At 535 cubes with 906 heads it took a .750 lift 286 @ .050 roller to make power above 5700 rpm.
I see little point in pushing a 4.5 stroke stock block above5500 to 6000 due to strength issues. Same with power. Stay at about 650 hp and enjoy the torque.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 543 440 Combo's
[Re: Dragula]
#2807511
08/10/20 11:16 PM
08/10/20 11:16 PM
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Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
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5.90 in the 1/8th is about 9.23 in the 1/4 and at 3000 race weight will take about 750 hp. So i would definately find a good 400 block and go with a 512 with ported large port heads. The easeist route is 14.5 + compression, mechanicl fuel injection, alcohol and a rollercam similar to an Isky RR735. Plan your valvetrain carefully. I needed more spring than isky called for with that cam. You might hit the number at 3000 lbs with that recipe and bowl porting only, but it will be close. I went 9.34 at 143 mph in Minnesota (1800 da?) With bowl ported 440-1 heads, 13/1, 499 cubes, 283/290/110 roller cam of .760 lift. Alky injected, shifting 6800.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 543 440 Combo's
[Re: gregsdart]
#2807597
08/11/20 09:56 AM
08/11/20 09:56 AM
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Joined: Jan 2003
Posts: 14,491
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,491
So. Burlington, Vt.
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To go 9.20’s at 3000lbs will require a little over 700hp, uncorrected, as it sits on the starting line.
So, you’d be shooting for 770-800 STP hp on the dyno.
Probably not the best plan for a stock block.
Making the power isn’t that hard.
Getting the stock block to live at that power level is the challenge.
I wonder how many have built stock 440 block combos that make 750+ hp(especially long stroke combos)........ and race them regularly(as in..... a typical weekly bracket program).
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: 543 440 Combo's
[Re: racerx]
#2807750
08/11/20 03:53 PM
08/11/20 03:53 PM
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Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,982
Frostbitefalls MN (Rocky&Bullw...
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5.90 in the 1/8th is about 9.23 in the 1/4 and at 3000 race weight will take about 750 hp. So i would definately find a good 400 block and go with a 512 with ported large port heads. The easeist route is 14.5 + compression, mechanicl fuel injection, alcohol and a rollercam similar to an Isky RR735. Plan your valvetrain carefully. I needed more spring than isky called for with that cam. You might hit the number at 3000 lbs with that recipe and bowl porting only, but it will be close. I went 9.34 at 143 mph in Minnesota (1800 da?) With bowl ported 440-1 heads, 13/1, 499 cubes, 283/290/110 roller cam of .760 lift. Alky injected, shifting 6800. It has been done. @ what weight ?  Race wieght was 3000 lbs. That 499 lived a good long life and was sold and hit with nitrous for a couple seasons.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 543 440 Combo's
[Re: Dragula]
#2807810
08/11/20 06:39 PM
08/11/20 06:39 PM
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Joined: Aug 2003
Posts: 43,095
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,095
Bend,OR USA
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I just don't know about a 4.5 stroke in a stock block...
I wouldn't learn either   AKA don't stress the main webbing in a stock block, even with a girdle 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 543 440 Combo's
[Re: gregsdart]
#2808175
08/12/20 05:40 PM
08/12/20 05:40 PM
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Joined: Aug 2008
Posts: 4,064
Mo.
racerx
master
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master
Joined: Aug 2008
Posts: 4,064
Mo.
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5.90 in the 1/8th is about 9.23 in the 1/4 and at 3000 race weight will take about 750 hp. So i would definately find a good 400 block and go with a 512 with ported large port heads. The easeist route is 14.5 + compression, mechanicl fuel injection, alcohol and a rollercam similar to an Isky RR735. Plan your valvetrain carefully. I needed more spring than isky called for with that cam. You might hit the number at 3000 lbs with that recipe and bowl porting only, but it will be close. I went 9.34 at 143 mph in Minnesota (1800 da?) With bowl ported 440-1 heads, 13/1, 499 cubes, 283/290/110 roller cam of .760 lift. Alky injected, shifting 6800. It has been done. @ what weight ? Race wieght was 3000 lbs. That 499 lived a good long life and was sold and hit with nitrous for a couple seasons. Thanks ….sounds real close to my combo but I have a little more cubes with more race weight and less cam and the i'v been is 600.2.
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Re: 543 440 Combo's
[Re: 8urvette]
#2854086
12/01/20 11:24 PM
12/01/20 11:24 PM
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Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
Dragula
OP
I Live Here
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OP
I Live Here
Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
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My parts arrived, and I would like to get back to this thread and see what HP you guys are at with one of these......I have Indy big easy 325 heads, so I am curious how far this will go. What kind of cam specs should I be shooting for? My little .680 lift 280 duration is staying with my 512/400 so I am going to need a new cam. I like the 280 duration, maybe more lift?
I will be in the 5's this year, one way or another...
Last edited by Dragula; 12/01/20 11:29 PM.
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Re: 543 440 Combo's
[Re: Dragula]
#2854216
12/02/20 10:46 AM
12/02/20 10:46 AM
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Joined: Jan 2003
Posts: 4,031
Shelby Twp. Mi
HardcoreB
master
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master
Joined: Jan 2003
Posts: 4,031
Shelby Twp. Mi
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What do you guys think of this combo in a stock block with a girdle? Since you asked and based on your stated goal...I think Dwayne (and some others) answered your question but it went unrecognized? The extra stroke will help add compression but you can do the same with a piston. If you are set on changing the combination of parts...I'd put the longest rod you can on a crank 3.75 to 4" and SPIN it for power make the bobweight under 2000 gms on a 2.1 pin. Put BETTER work and parts in your top end and it'll make the same power at 451" as it will at 541" but the bobweight and longer rod will help it live.
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