451 build
#1389968
02/18/13 09:46 PM
02/18/13 09:46 PM
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Joined: Dec 2008
Posts: 459
pana illinois
bigblock4x4
OP
mopar
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OP
mopar
Joined: Dec 2008
Posts: 459
pana illinois
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gonna build a 451,here's what i got,ported heads,they flow [Email]260@.550[/Email] lift.2.18,1.81 valves,m1 intake,800 holley,1 3/4 headers,and i'm gonna use a mopar .528 cam,also the heads have been milled they are 80 cc's chamber and the pistons are at 0 deck height,any ideas what this thing make horspower wise?this is my first stroker build so i'm winging it.thanks,it's going in a 3/4 ton truck for the time being.
Last edited by bigblock4x4; 02/21/13 12:59 AM.
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Re: what do u guys think
[Re: bigblock4x4]
#1389969
02/19/13 12:27 AM
02/19/13 12:27 AM
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Joined: Jan 2003
Posts: 27,421
Balt. Md
383man
Too Many Posts
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Too Many Posts
Joined: Jan 2003
Posts: 27,421
Balt. Md
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Well my old 446 was a .030 over 440 with 906 heads and the MP .557 cam. It use a Holley Street Dominator intake and a 850 DP and was 10.0 comp. Ran fine on pump gas as I used the KB quench pad pistons to get quench. It also used 1-3/4 headers. I never dynoed it but it ran a best of 11.49 @ 116 in my 3700 lb 63. I would guess it was about 500 flywheel hp. Ron
Last edited by 383man; 02/19/13 12:28 AM.
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Re: what do u guys think
[Re: bigblock4x4]
#1389972
02/21/13 03:43 AM
02/21/13 03:43 AM
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Joined: Mar 2003
Posts: 4,848
Memphis
HemiRick
master
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master
Joined: Mar 2003
Posts: 4,848
Memphis
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U using a forged or cast crank? I built my 451 w a cast and clearancing needed was minimal, just a little grinding on the block. I didnt have the crank cut down and it was minimal work to balance with 440source Hbeams and Ross pistons.
Take care,
Rick
68 Coronet R/T 440 & 68 Charger 528 Hemi,and 5 Challengers! 6 cyl, 318, 360, 383, 451
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Re: 451 build
[Re: bigblock4x4]
#1389975
02/21/13 10:07 PM
02/21/13 10:07 PM
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Joined: Jan 2012
Posts: 1,650
Harm City Md.
Dan Halen
top fuel
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top fuel
Joined: Jan 2012
Posts: 1,650
Harm City Md.
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Quote:
i am using a steel crank,and i am using the shorter 400 rod so i had to do some clearancing on the crank with the piston that i am using.
I just did a 400 block with KB quench dome pistons,Eddie heads and a
Racer Brown SSH-44. Haven't put it in yet but I know of a few others
with this combination and it works good.
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Re: 451 build
[Re: bigblock4x4]
#1389976
02/21/13 10:32 PM
02/21/13 10:32 PM
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Joined: Feb 2003
Posts: 16,146
Mesa, Arizona
dart4forte
I Live Here
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I Live Here
Joined: Feb 2003
Posts: 16,146
Mesa, Arizona
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Quote:
gonna build a 451,here's what i got,ported heads,they flow [Email]260@.550[/Email] lift.2.18,1.81 valves,m1 intake,800 holley,1 3/4 headers,and i'm gonna use a mopar .528 cam,also the heads have been milled they are 80 cc's chamber and the pistons are at 0 deck height,any ideas what this thing make horspower wise?this is my first stroker build so i'm winging it.thanks,it's going in a 3/4 ton truck for the time being.
So, how many inches of vacume did you flow those heads at?
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Re: 451 build
[Re: dogdays]
#1389979
02/22/13 07:53 PM
02/22/13 07:53 PM
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Joined: Jan 2003
Posts: 8,940
Holly/MI
Dean_Kuzluzski
master
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master
Joined: Jan 2003
Posts: 8,940
Holly/MI
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Quote:
Of course, when one compares that with the 250cfm STOCK peak flow from a 5.7Hemi head, it starts to look a little weak.
True. But if you're starting with a big block wedge powered truck it's probably less time & money to build a budget built, low reciprocating mass, 451 than a 3rd Gen Hemi. Or even if it's a smallblock now, the brackets, trans, etc are still cheaper.
Not trying to start sumthin', just sayin,! 
Last edited by Dean_Kuzluzski; 02/22/13 07:55 PM.
R.I.P.- Gary "Coop" Davis 02/09/68-05/13/04
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Re: 451 build
[Re: Dean_Kuzluzski]
#1389980
02/23/13 01:00 PM
02/23/13 01:00 PM
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Joined: Dec 2008
Posts: 459
pana illinois
bigblock4x4
OP
mopar
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OP
mopar
Joined: Dec 2008
Posts: 459
pana illinois
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truck already has a 440 in it,just wanting too try building a 451,i think it would/should be more FUN,the 440 is healthy,but i think the 451 should b more healthy.money is a restraint,so taking baby steps,little at a time,just upgrading a little.i have been accumulating parts for this build for a couple years,got the pistons rods and crank and block and heads,hopefully i'll find some more parts at the indy swap meet in march,oh yeah!
Last edited by bigblock4x4; 02/23/13 01:02 PM.
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Re: what do u guys think
[Re: 383man]
#1389981
02/23/13 01:05 PM
02/23/13 01:05 PM
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Joined: Dec 2008
Posts: 459
pana illinois
bigblock4x4
OP
mopar
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OP
mopar
Joined: Dec 2008
Posts: 459
pana illinois
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Quote:
Well my old 446 was a .030 over 440 with 906 heads and the MP .557 cam. It use a Holley Street Dominator intake and a 850 DP and was 10.0 comp. Ran fine on pump gas as I used the KB quench pad pistons to get quench. It also used 1-3/4 headers. I never dynoed it but it ran a best of 11.49 @ 116 in my 3700 lb 63. I would guess it was about 500 flywheel hp. Ron
i'd like too find a used set of those pistons
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Re: 451 build
[Re: bigblock4x4]
#1389983
02/25/13 11:30 AM
02/25/13 11:30 AM
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Joined: Jul 2005
Posts: 1,954
Blairsden, CA
Triggerfish
top fuel
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top fuel
Joined: Jul 2005
Posts: 1,954
Blairsden, CA
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Low deck strokers are a great motor & yours should make some power,
but in a 4x4, low end torque is a must, especially if you have big off road tires. Ask me how I know! I sold the 451 torque monster I built for my Barracuda & installed a 70 383 mag with a little smaller cam than yours (power band was 2500-6500), stock 906's, and with the
35x12.5x16.5 BFG's on my 71 Power Wagon (3.55's), street manners sucked! Low vacuum, lotta gas to get it rollin. Wasn't much fun. I just installed a small Comp cam & new 906's and its a different truck.
If you've got 4:10's or lower & a stick, it might be more street friendly. Just my 2 cents. Your build should make 500 if the heads don't hold it back a little & should have mid 500's torque, too.
Best of luck with your build.
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Re: 451 build
[Re: Triggerfish]
#1389984
02/26/13 08:50 PM
02/26/13 08:50 PM
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Joined: Jan 2006
Posts: 250
Iceland
BadMoonRacer
enthusiast
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enthusiast
Joined: Jan 2006
Posts: 250
Iceland
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Here is that book being mentioned. http://www.amazon.com/Build-Max-performa...dy+finkelbeiner I own a copy and have found it very useful. It should belong to any good library devoted to Mopar literature. Regards Ragnar in Iceland
66 Charger, 451, .582" lift, 11" conv. 4.10:1. 4118 lbs 11.75@117 mph on regular Firestone Firehawk radials.
Icelandic Champion in MC 2007, 2008, 2009 and 2022.
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Re: 451 build
[Re: Triggerfish]
#1389986
02/27/13 02:55 PM
02/27/13 02:55 PM
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Joined: Dec 2008
Posts: 459
pana illinois
bigblock4x4
OP
mopar
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OP
mopar
Joined: Dec 2008
Posts: 459
pana illinois
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Quote:
Low deck strokers are a great motor & yours should make some power,
but in a 4x4, low end torque is a must, especially if you have big off road tires. Ask me how I know! I sold the 451 torque monster I built for my Barracuda & installed a 70 383 mag with a little smaller cam than yours (power band was 2500-6500), stock 906's, and with the
35x12.5x16.5 BFG's on my 71 Power Wagon (3.55's), street manners sucked! Low vacuum, lotta gas to get it rollin. Wasn't much fun. I just installed a small Comp cam & new 906's and its a different truck.
If you've got 4:10's or lower & a stick, it might be more street friendly. Just my 2 cents. Your build should make 500 if the heads don't hold it back a little & should have mid 500's torque, too.
Best of luck with your build.
triggerfish i want ur truck,awesome.i am gonna put the 451 in my fourwheel drive,but would love too find about a 65 66 shortbed truck too put it in,and go out and stomp some mustang and camaro tail,thanks for the awesome feedbacks everyone
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