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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: torqueaddict]
#1265091
07/10/12 02:44 AM
07/10/12 02:44 AM
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Joined: Jan 2003
Posts: 70,126
Here
DirectSubjection
Tacohead. The First and Only
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Tacohead. The First and Only
Joined: Jan 2003
Posts: 70,126
Here
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Depends on the components used, set-up etc. A broad statement overall would be something like:
A shorter stroke may feel more "snappy" and allow for faster and higher revving.
A longer stroke may provide more torque and thump feel.
Ride eternal, shiny and chrome
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: DirectSubjection]
#1265092
07/10/12 12:03 PM
07/10/12 12:03 PM
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Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
DPelletier
I Live Here
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I Live Here
Joined: Apr 2005
Posts: 15,134
Kelowna, B.C. Canada
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The larger engine will make more power.  as far as the bore vs. stroke thing if everything else is equal, it makes no appreciable difference.  Dave
1970 Super Bee 440 Six Pack
1974 'Cuda
2008 Ram 3500 Diesel
2006 Ram 3500 Diesel
2004.5 Ram 2500 Diesel
2003 Ram 3500 Diesel
2006 Durango Limited
[url] http://1970superbee.piczo.com [/url]
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: DPelletier]
#1265093
07/10/12 03:04 PM
07/10/12 03:04 PM
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Joined: Jan 2003
Posts: 5,906
Athens, Greece
Pyper70
master
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master
Joined: Jan 2003
Posts: 5,906
Athens, Greece
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4.15 you can use mostly all general components....when you hit a 4.25 stroke you get into issues like external oiling, counterbalances smacking into things stuff like that
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: Pyper70]
#1265094
07/10/12 03:06 PM
07/10/12 03:06 PM
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Joined: Jan 2003
Posts: 75,060
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,060
U.S.S.A.
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Quote:
4.15 you can use mostly all general components....when you hit a 4.25 stroke you get into issues like external oiling, counterbalances smacking into things stuff like that
4.25 stroke cranks are 99.99% 2.2 big end, not chrysler big end, so this isn't an issue, even in a low deck.
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: Dean_Kuzluzski]
#1265099
07/10/12 06:10 PM
07/10/12 06:10 PM
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Joined: Aug 2010
Posts: 185
east bay ca
torqueaddict
OP
member
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OP
member
Joined: Aug 2010
Posts: 185
east bay ca
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Quote:
Quote:
I am really debating on what I am gonna do. I already have most of the components for the 4.15 stroke. .................... If I get the refund ..................I really dont know what to do.
If they WILL give you a refund and NOT a credit you may have a choice.
A few more cubes isn't worth the stress. Build what you have and learn from it for the next shortblock. 
I think your right but I am just really upset about how hughes has treated me and acted as if it were my fault. They will refund me at a 400 dollar restocking fee, that means I am only gonna get around 1600 back. If I keep the it I have to pay them 200 dollars for them to send me the correct pistons and 250 to balance it from my local machine shop. Or I can take my money and go to 440source. If I go to 440source at least I can get a custom kit that works put of the box.
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: torqueaddict]
#1265100
07/10/12 06:28 PM
07/10/12 06:28 PM
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Joined: Nov 2011
Posts: 2,154
Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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4 1/4" stroke and more I really don't like.. it puts the oil rings WAY to close to the pin, or OVER the wrist pin. No way I'd be convinced it would last in a REAL street engine. JMHO.
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: DARTH V8Я]
#1265103
07/10/12 08:17 PM
07/10/12 08:17 PM
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Joined: Feb 2005
Posts: 4,318
Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,318
Prospect, PA
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Quote:
4 1/4" stroke and more I really don't like.. it puts the oil rings WAY to close to the pin, .... JMHO.
Curious, exactly what dimension between the oil ring and pin is too small?
I prefer the 4.25 arm w/ 2.2 big end, 7.1 rod and .990 pin for the following reasons: 1)Bigger, 2)lighter piston, 3)better rod/throw ratio, 4)lighter rotating. And there is no down side.
But, in the end, it likely makes no measurable difference to us street guys.
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: CHAPPER]
#1265105
07/10/12 09:49 PM
07/10/12 09:49 PM
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Joined: Jan 2003
Posts: 10,011
Frostbitefalls MN (Rocky&Bullw...
gregsdart
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,011
Frostbitefalls MN (Rocky&Bullw...
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Consider the size difference by percentage. Not much between 4.15 and 4.25. If there is no problem switching go with the longer stroke. Or longer, if it will clear and still allow an internal oil pickup, which I assume you want to keep.
After having built a 535 cube stock block and heads motor, IMHO bigger is better. That motor would run low tens in a 3400 lb car shifting at 5700 rpm.
You should easily be able to fit a 4.25 stroke deal in a stock block with a 2.2 rod bearing. The other consideration is which size bearing to run. The BBC 2.2 with .990 piston pins is the best choice because it reduces rotating weight. All the parts get lighter, crank, rods, pistons!
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: torqueaddict]
#1265107
07/11/12 01:36 AM
07/11/12 01:36 AM
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Joined: Jan 2003
Posts: 75,060
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,060
U.S.S.A.
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Quote:
Quote:
Quote:
I am really debating on what I am gonna do. I already have most of the components for the 4.15 stroke. .................... If I get the refund ..................I really dont know what to do.
If they WILL give you a refund and NOT a credit you may have a choice.
A few more cubes isn't worth the stress. Build what you have and learn from it for the next shortblock.
I think your right but I am just really upset about how hughes has treated me and acted as if it were my fault. They will refund me at a 400 dollar restocking fee, that means I am only gonna get around 1600 back. If I keep the it I have to pay them 200 dollars for them to send me the correct pistons and 250 to balance it from my local machine shop. Or I can take my money and go to 440source. If I go to 440source at least I can get a custom kit that works put of the box.
Did you tell Hughes exactly what you were looking for? Did they offer you, or tell you, that there was a dish piston option?
I've had my share of issues with Dave , but from reading your posts on this whole build subject I really don't think Hughes is totally at fault here.
Do you really think that a cheap charlies chinese junk stroker kit, from anyone, is going to be good to go out of the box ?  ...
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Re: 4.15 stroke vs 4.25 stroke what are the pros and cons
[Re: torqueaddict]
#1265108
07/11/12 05:52 AM
07/11/12 05:52 AM
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Joined: May 2008
Posts: 5,399
Aurora, Colorado
451Mopar
master
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master
Joined: May 2008
Posts: 5,399
Aurora, Colorado
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I built a stroked 400 with the 4.15" stroke crank , 6.76" rods, and flat tops (499cid @ 4.375" bore.) With the 75cc Edel-broke Victors, Compression is 12.4:1.
Everything fit, only needed to clearance the oil pump pickup boss. The machine shop I used "re-balanced" the 440 source balanced assembly, and I think they messed up the balance. I'm going to have it re-checked now that the engine is out because of the broken cylinder head.
I also just built a stroked 440 (only 0.030 over or 4.350") with the 4.25" stroke, 7.1" rods, and 17cc dished pistons with 84cc stealth heads for about 10.3:1 compression, and 505 cid (I think 512 is with a 4.375" bore size.) No clearance issues, just the oil pump pickup boss. FWIW, both engines are using 1/2" internal oil pickup tubes.
I bought a scale and rod balancing fixture and verified the balance weights were the same as what 440 source had on their balance sheet. My average Reciprocaring weight (piston, pin, locks, rings, and pin end of rod measured within 1.39 gram. The Rotating end weight was within 0.71 gram. So, I did not re-balance the crank, and this engine runs smooth. A few rods had tight pin bosses, and one had the rod bearing "notch" slightly out of place where it positioned the bearing too close to the crank fillet so there was almost no rod side clearance. This was found during mockup and corrected by chamfering the bearing slightly.
All the main and rod oil clearances were good, around 0.002".
No issues with ring packs or anything like that.
Windage tray selection for clearance of the crank and oil pan may be a consideration? The 440 source stroker windage trays are too deep for a stock or reproduction "Hemi" oil pan, but do fit most race oil pans.
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