Re: 440 block
[Re: cesar perez]
#2867810
01/01/21 09:44 PM
01/01/21 09:44 PM
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Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
Dragula
I Live Here
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I Live Here
Joined: May 2004
Posts: 12,383
Taxes & Virus's R-US, NY
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We will found out this year......We built a 440Source high compression 541 with Indy 325EZ heads.....Last 512 combo calculates to 809hp....We are putting bigger valves in the heads and bigger headers on it and 1 more point of compression...We might even put a TR on it....Should make +840hp
Old Short Block is for sale on here but won't last long.....
Last edited by Dragula; 01/01/21 10:51 PM.
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Re: 440 block
[Re: DrCharles]
#2867866
01/01/21 11:08 PM
01/01/21 11:08 PM
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Joined: Jan 2005
Posts: 2,540
Milwaukee WI
TRENDZ
master
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master
Joined: Jan 2005
Posts: 2,540
Milwaukee WI
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Max hp depends on how you plan to get there. Nuts and bolts will be lower than nitrous, nitrous will be lower than supercharged. Supercharged will be lower than turbocharged. In other words, your path determines your answer.
"use it 'till it breaks, replace as needed"
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Re: 440 block
[Re: cesar perez]
#2867919
01/02/21 01:55 AM
01/02/21 01:55 AM
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Joined: Jan 2003
Posts: 30,995
Oregon
AndyF
I Win
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I Win
Joined: Jan 2003
Posts: 30,995
Oregon
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Whats the max Hp out of a 440 block Somewhere around 800 hp. I've seen a few 800 hp Mopar big blocks that have cracked the main webs up into the cam tunnel. You can break them before 800 hp if the engine detonates, might be able to get them to live over 800 hp some special care but I wouldn't count on it. The original block design was for just a couple hundred horses so a 4x design margin is asking a lot.
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Re: 440 block
[Re: AndyF]
#2867925
01/02/21 03:23 AM
01/02/21 03:23 AM
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Joined: Aug 2003
Posts: 43,124
Bend,OR USA
Cab_Burge
I Win
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I Win
Joined: Aug 2003
Posts: 43,124
Bend,OR USA
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Whats the max Hp out of a 440 block Somewhere around 800 hp. I've seen a few 800 hp Mopar big blocks that have cracked the main webs up into the cam tunnel. You can break them before 800 hp if the engine detonates, might be able to get them to live over 800 hp some special care but I wouldn't count on it. The original block design was for just a couple hundred horses so a 4x design margin is asking a lot.  Cesar your best bet is to use a early 400 block or buy a new race block if you don't want to get hurt while racing from a block failure. Stock 440 blocks are not a good choice for drag racing above the 700 HP level with no power adders, lower with them added 
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 440 block
[Re: Dragula]
#2868609
01/03/21 07:25 PM
01/03/21 07:25 PM
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Joined: Dec 2013
Posts: 403
Romulus, MI
GTS340
mopar
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mopar
Joined: Dec 2013
Posts: 403
Romulus, MI
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Last 512 combo calculates to 809hp.... Not even close, actually under 700 Old Short Block is for sale on here but won't last long..... Why is that? Giveaway pricing?
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Re: 440 block
[Re: GTS340]
#2868615
01/03/21 07:45 PM
01/03/21 07:45 PM
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Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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Imo, part of any discussion about how much power will the stock block take should include....... how many passes does it have to last?
Some guys race every week all season and can put on a couple hundred passes+.
Other people go to the track a handful of times a year, and might average 5 passes per outing...... so like 25 passes per year.
Let’s say the block gives up at 125 passes for a particular build.
For the real racer this is only a bit more than a 1/2 season of use.
For the casual test n tuner....... it could be 5 years of use.
The other question is....... how much other stuff, if any, gets trashed when the block fails?
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: 440 block
[Re: fast68plymouth]
#2868623
01/03/21 08:05 PM
01/03/21 08:05 PM
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Joined: Feb 2005
Posts: 20,159
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,159
PA.
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I tore my Indy headed 500 cubic inch stroker out after 275 passes and my buddy wanted to buy my shortblock and i refused to sell it to him. When I tore it down I found a crack from the mains heading towards the cam. That engine ran 8.60@155mph at just under 2500 pounds. That engine had a 440source assembly and their steel billet main caps. I have a keith black and mega block sitting here now and will never build another engine with a stock block but if I did it would have aluminum main caps.
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: 440 block
[Re: pittsburghracer]
#2868626
01/03/21 08:15 PM
01/03/21 08:15 PM
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Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,492
So. Burlington, Vt.
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155@2500lbs shows 720hp.
So, could easily be 750-770 STP HP on the dyno.
Failed at some point before 275 passes.
I built a 14:1 493 for a customer at a point in time between the megablocks and the World blocks.
There were none to be had, so I used a 440 block. Stock caps, tall fill.
Roller cam, ported std port SR heads....... made right about 700hp.
300 passes later it was back for freshening. Everything looked mint.
Could have easily put the rings and bearings right back in.
Back in the car....... all is good...... runs it another 300 or so passes(about 100 passes per year).
Back in the shop for another freshening. Everything still looks mint........ except the #4 cap is broken, and there is a crack that goes all the way to the cam. Crank is also cracked in number 4 main.
NO SIGNS OF ANY CAP WALK.
So...... it happened at some point between 300 and 600 passes.
I think part of why it lasted as long as it did is the owner didn’t really “abuse” it.
Shifted below 6500, and it barely turned 6500 thru the lights.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: 440 block
[Re: pittsburghracer]
#2868632
01/03/21 08:41 PM
01/03/21 08:41 PM
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Joined: Dec 2013
Posts: 403
Romulus, MI
GTS340
mopar
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mopar
Joined: Dec 2013
Posts: 403
Romulus, MI
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I will never build another engine with a stock block but if I did it would have aluminum main caps. Really? Sell all 37 of the 360 blocks you had?
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Re: 440 block
[Re: GTS340]
#2868646
01/03/21 09:15 PM
01/03/21 09:15 PM
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Joined: Feb 2005
Posts: 20,159
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,159
PA.
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I will never build another engine with a stock block but if I did it would have aluminum main caps. Really? Sell all 37 of the 360 blocks you had? I think we are talking 440 blocks in this post. My 37 small blocks aren’t going anywhere. Lol.
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: 440 block
[Re: fast68plymouth]
#2868647
01/03/21 09:18 PM
01/03/21 09:18 PM
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Joined: Feb 2005
Posts: 20,159
PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,159
PA.
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155@2500lbs shows 720hp.
So, could easily be 750-770 STP HP on the dyno.
Failed at some point before 275 passes.
I built a 14:1 493 for a customer at a point in time between the megablocks and the World blocks.
There were none to be had, so I used a 440 block. Stock caps, tall fill.
Roller cam, ported std port SR heads....... made right about 700hp.
300 passes later it was back for freshening. Everything looked mint.
Could have easily put the rings and bearings right back in.
Back in the car....... all is good...... runs it another 300 or so passes(about 100 passes per year).
Back in the shop for another freshening. Everything still looks mint........ except the #4 cap is broken, and there is a crack that goes all the way to the cam. Crank is also cracked in number 4 main.
NO SIGNS OF ANY CAP WALK.
So...... it happened at some point between 300 and 600 passes.
I think part of why it lasted as long as it did is the owner didn’t really “abuse” it.
Shifted below 6500, and it barely turned 6500 thru the lights.
Yaaa I was pushing mine harder than that. I still to this day think the steel billet caps was a mistake on my part. Like I said I would never do it again.
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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