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Stroker kit- Eagle 520 or 440Source 512?
#2280740
04/02/17 05:14 AM
04/02/17 05:14 AM
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Joined: Oct 2004
Posts: 16,479
Canada
CrAzYMoPaRGuY
OP
I Live Here
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OP
I Live Here
Joined: Oct 2004
Posts: 16,479
Canada
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Street/strip car- How are the quality/parts of the 440 Source stroker kits? Would the Eagle stroker kits be a better bet? The Eagle kit appears CHEAPER than the 440 source kit...?
On a 76 and newer block is the billet caps/main stud girdle necessary for a street/strip hydraulic cam stroker to live?
Never done a stroked RB.....
CrAzYMoPaRGuY
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: CrAzYMoPaRGuY]
#2280748
04/02/17 09:00 AM
04/02/17 09:00 AM
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Joined: Mar 2009
Posts: 2,464
Sydney,Australia
tex013
top fuel
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top fuel
Joined: Mar 2009
Posts: 2,464
Sydney,Australia
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My 2 cents
In my stock stroke 440 i have an eagle crank . Been running nearly 10 years , daily driver and bracket raced . 5 or 6 thousand miles a year . No problems , had factory caps .
New motor has 440 source 4.25 stroker kit . I did fit their billet caps on thus one for a bit more strength . Only running since January. No issues at this time . Quite happy with results .
Both brands will work , is there better ? Yep i am sure . Bang for buck ? Definately got that .
440 is a 78 block , 505 may be also a 78 .
Tex
New best ET 10.259@129.65 .
New best MPH 130.32
Finally fitted a solid cam,
stepped it up a bit more
3690lbs through the mufflers
New World block 3780lbs 10.278@130.80 . Wowser 10.253@130.24 footbraking from 1500rpm
Power by Tex's Automotive
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: tex013]
#2280833
04/02/17 12:33 PM
04/02/17 12:33 PM
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Joined: Dec 2013
Posts: 4,681
Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,681
Wichita
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Molnar all the way. I like the 4.25 stroke crank, 2.20 rod journal with 7.1" Molnar rod.
I did convert to studs in the mains but didn't do aftermarket caps.
Lots of hard sreet miles and dragstrip passes.
'63 Dodge 330
11.19 @ 121 mph
Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs.
10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: CrAzYMoPaRGuY]
#2281062
04/02/17 06:56 PM
04/02/17 06:56 PM
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Joined: Apr 2017
Posts: 18
Silver Spring, MD
GardnerJamesW
member
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member
Joined: Apr 2017
Posts: 18
Silver Spring, MD
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Building my 512 now... Molnar Crank and Rods, Icon pistons. better quality for just a few dollars more than the 440source stuff (although I did go with a 440source girdle and billet mains)
As far as quality they are decent! Just need to watch the taper and the journals
Last edited by GardnerJamesW; 04/02/17 07:01 PM.
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: CrAzYMoPaRGuY]
#2281079
04/02/17 07:34 PM
04/02/17 07:34 PM
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Joined: Jan 2003
Posts: 14,503
So. Burlington, Vt.
fast68plymouth
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 14,503
So. Burlington, Vt.
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Several of the FAST/Supercar guys run the 520(4.375 stroke) combos. There is hardly any additional clearancing needed over the 505(4.25 stroke) combo.
Depending on exactly what you're looking to build, off the shelf pistons are available for either.
68 Satellite, 383 with stock 906’s, 3550lbs, 11.18@123
Dealer for Comp Cams/Indy Heads
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: fast68plymouth]
#2281154
04/02/17 09:45 PM
04/02/17 09:45 PM
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Joined: Dec 2013
Posts: 4,681
Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,681
Wichita
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Several of the FAST/Supercar guys run the 520(4.375 stroke) combos. There is hardly any additional clearancing needed over the 505(4.25 stroke) combo.
Depending on exactly what you're looking to build, off the shelf pistons are available for either. Mine didn't require clearancing at all. The closest part was the oil pump pickup boss and I had right at .060 as I recall.
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: CrAzYMoPaRGuY]
#2281212
04/02/17 11:02 PM
04/02/17 11:02 PM
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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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I use the 440Source 4.15 stroker kit for my 493. I also use the billet steel main caps and ARP studs. Had the block lined bored of course with new caps and the kit included the stock lenth rods and 440Source dished pistons for 10.6 comp with the EZ head. It has nice .045 quench and is fine on 92 pump. Been in my car together since 2011 and its a street car I drive alot in the summer and race maybe once or twice a year. Its been great as I had her out for a cruise today since it was nice weather today. Ron
Last edited by 383man; 04/03/17 01:51 PM.
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: AndyF]
#2281334
04/03/17 02:21 AM
04/03/17 02:21 AM
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Joined: Oct 2004
Posts: 16,479
Canada
CrAzYMoPaRGuY
OP
I Live Here
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OP
I Live Here
Joined: Oct 2004
Posts: 16,479
Canada
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If you are starting with a good 440 block then I'd pick a 4.25 stroke crank with 2.20 rod journals. Then go with either a 6.800 or 7.100 long BB Chevy rod depending on piston selection. I'd keep the bore size as small as possible just to keep the wall thickness up and to allow for future rebuilds. But sometimes you can do it all at the same time without going to a custom piston so you just have to sit down and figure it out. Don't forget that you need to know what cylinder head you are going to run in order to figure out the compression ratio that you want. Once you know what you want then you can shop for a kit or buy the parts separate. I don't have the heads I want to run yet either, so I would figure out what I want and order accordingly.... I have a 1976 block, actually a couple. I was looking at a 440Source kit- 512ci with 2.2 Chevy journal sizes, trying for a little over 10:1 static with aluminum heads and a hydraulic flat tappet cam at this point. I know the CNC Stealth heads say they flow decent numbers but my buddy with a flow bench doesnt think so?! Trick flow heads too..? It's a 3600ish pound street car with a 727 and 4.10 gears, I might throw 3.23 or 3.55 gears in once I swap though. 12.50 rear tires and leaf springs. 
CrAzYMoPaRGuY
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: CrAzYMoPaRGuY]
#2281468
04/03/17 12:25 PM
04/03/17 12:25 PM
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Joined: Jan 2012
Posts: 2,652
Stuttgart, Arkansas
rickseeman
master
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master
Joined: Jan 2012
Posts: 2,652
Stuttgart, Arkansas
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440 Source are Mopar people. That gives them the edge for me. Look at Eagle's website. Is that someone you want to buy Mopar parts from?
2011 Drag Pak Challenger
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: CrAzYMoPaRGuY]
#2281473
04/03/17 12:31 PM
04/03/17 12:31 PM
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Joined: Jul 2004
Posts: 19,317
State of confusion
Thumperdart
I Live Here
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I Live Here
Joined: Jul 2004
Posts: 19,317
State of confusion
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If you are starting with a good 440 block then I'd pick a 4.25 stroke crank with 2.20 rod journals. Then go with either a 6.800 or 7.100 long BB Chevy rod depending on piston selection. I'd keep the bore size as small as possible just to keep the wall thickness up and to allow for future rebuilds. But sometimes you can do it all at the same time without going to a custom piston so you just have to sit down and figure it out. Don't forget that you need to know what cylinder head you are going to run in order to figure out the compression ratio that you want. Once you know what you want then you can shop for a kit or buy the parts separate. I don't have the heads I want to run yet either, so I would figure out what I want and order accordingly.... I have a 1976 block, actually a couple. I was looking at a 440Source kit- 512ci with 2.2 Chevy journal sizes, trying for a little over 10:1 static with aluminum heads and a hydraulic flat tappet cam at this point. I know the CNC Stealth heads say they flow decent numbers but my buddy with a flow bench doesnt think so?! Trick flow heads too..? It's a 3600ish pound street car with a 727 and 4.10 gears, I might throw 3.23 or 3.55 gears in once I swap though. 12.50 rear tires and leaf springs. Stock offset ground factory forged here 15+ HARD ass years and if you removed those chokes on top of the carbs, I'd bet it would/should breath better...........nice ride........... 
Last edited by Thumperdart; 04/03/17 12:32 PM.
72 Dart 470 n/a BB stroker street car `THUMPER`...Check me out on FB Dominic Thumper for videos and lots of carb pics......760-900-3895.....
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: Cab_Burge]
#2281818
04/03/17 08:27 PM
04/03/17 08:27 PM
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Joined: Oct 2004
Posts: 16,479
Canada
CrAzYMoPaRGuY
OP
I Live Here
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OP
I Live Here
Joined: Oct 2004
Posts: 16,479
Canada
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What is the stroke and rod journal size and rod type on the Eagle kit? The reason I'm asking that is for the clearances on the rods to the block and how much grinding you will need to do to clear the possibly longer stroke on the 520 C.I. kit, especially if it has the stock Mopar rod journal sizes   I like the 4.250 and 4.300 stroke in both 400 and 440 blocks with BB Chevy rod journal sizes(2.200) I have built several other stroker motors with the stock Mopar rod journal sizes with both 4.375 and 4.500 stroke, never again with those rod journal sizes   I stillllllll haven't found out the rod journal size!!? Stroke is 4.375 Eagle kit is 21203030
CrAzYMoPaRGuY
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Re: Stroker kit- Eagle 520 or 440Source 512?
[Re: CrAzYMoPaRGuY]
#2281819
04/03/17 08:31 PM
04/03/17 08:31 PM
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Joined: Jan 2003
Posts: 3,505
DFW
mr_340
master
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master
Joined: Jan 2003
Posts: 3,505
DFW
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One of my friends bought a 440Source 4.25" stroke crank for his bracket Challenger. They are rebuilding the engine now since he said the crank oiling holes were drilled wrong. I don't know the details, but it might be worth checking if you have one of their cranks.
My machinist/engine builder down in Tampa said he had a SCAT crank that had machine work as good as the Bryant cranks he prefers. I'd lean towards a SCAT crank over an Eagle or 440Source based on his experience. $.02
Floyd Lippencott IV
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