Re: 4.15 stroke with a 7.1" rod?
[Re: barracuda7199]
#1549873
12/18/13 06:08 PM
12/18/13 06:08 PM
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Joined: Oct 2006
Posts: 596
Mass.
80fbody
mopar
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mopar
Joined: Oct 2006
Posts: 596
Mass.
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Deleted.
Last edited by 80fbody; 12/18/13 06:20 PM.
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Re: 4.15 stroke with a 7.1" rod?
[Re: Cab_Burge]
#1549876
12/19/13 01:03 PM
12/19/13 01:03 PM
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Joined: Jan 2003
Posts: 7,497
Minnesota
Hemi_Joel
master
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master
Joined: Jan 2003
Posts: 7,497
Minnesota
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What parts do you want to re-use? That makes a difference. If it is only the flexplate, maybe you could sell or trade the old one, and get an 8 bolt. Might be worth it if it gives you more choices on the more expensive components like the crankshaft. I think the jury is still out on the benefits of a long rod. I know of at least one very smart and succesfull builder who says a short rod makes more power because the piston has a quicker rate of acceleration away from TDC, thus intiating beter intake flow velocity at the point of maximum cam lift. I've had others tell me that the lighter piston and less side load of the long rod is better. Who knows?  
[img]http://i.imgur.com/boeexFms.jpg[/img]31 Plymouth Coupe, 392 Hemi, T56 magnum RS23J71 RS27J77 RP23J71 RO23J71 WM21J8A I don't regret the things I've done. I only regret the things I didn't do. "Wise men talk because they have something to say; fools because they have to say something. ~ Plato"
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Re: 4.15 stroke with a 7.1" rod?
[Re: dogdays]
#1549879
12/19/13 02:42 PM
12/19/13 02:42 PM
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Joined: Apr 2011
Posts: 280
GEORGIA
barracuda7199
OP
enthusiast
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OP
enthusiast
Joined: Apr 2011
Posts: 280
GEORGIA
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Quote:
It is possible to buy a 4.25" crank with 6 bolt flange, I don't know why the OP can't find them. And is a flexplate enough reason to change a project?
R.
It's not a good reason to change the project. Just trying to be smart where I spend the money. The ported 346 heads have to stay, single plane m1 and 850 DP. I know how these projects usually end up costing more than you plan I guess I am trying to compromise to much. What stroke would you go with in a 440 block? I have a couple 400 blocks but no intake pushrods etc....... It is a street car but I am not expecting or wanting a stock idle and it is not a daily driver. I want a 10 second street car period!
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Re: 4.15 stroke with a 7.1" rod?
[Re: mopar dave]
#1549880
12/19/13 03:20 PM
12/19/13 03:20 PM
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Joined: Sep 2013
Posts: 168
Moparts
SSDart
member
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member
Joined: Sep 2013
Posts: 168
Moparts
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Quote:
using the pipemax program I noticed if I input a shorter rod(6.300 to 6.123) it shows a 2hp increase. maybe that builder is correct with using shorter rods?
 something like that......
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Re: 4.15 stroke with a 7.1" rod?
[Re: barracuda7199]
#1549881
12/19/13 03:23 PM
12/19/13 03:23 PM
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Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
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You'd see more of gain by putting better heads on your current 440 than building a stroker and reusing those 346 heads.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 4.15 stroke with a 7.1" rod?
[Re: an8sec70cuda]
#1549882
12/19/13 03:29 PM
12/19/13 03:29 PM
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Joined: Apr 2011
Posts: 280
GEORGIA
barracuda7199
OP
enthusiast
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OP
enthusiast
Joined: Apr 2011
Posts: 280
GEORGIA
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Quote:
You'd see more of gain by putting better heads on your current 440 than building a stroker and reusing those 346 heads.
It's knocking in the bottom end. Some EZ heads are planned in the future after the shortblock is done.
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Re: 4.15 stroke with a 7.1" rod?
[Re: barracuda7199]
#1549884
12/19/13 03:39 PM
12/19/13 03:39 PM
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Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,380
Marion, South Carolina [><]
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Quote:
Quote:
You'd see more of gain by putting better heads on your current 440 than building a stroker and reusing those 346 heads.
It's knocking in the bottom end. Some EZ heads are planned in the future after the shortblock is done.
Ahhh, gotcha.  Like said earlier, K1 does have a 4.25" stroke crank w/ 2.2 journals and a 6 bolt flange...I have one. Talk w/ Dan at Performance Only. He'll hook you up w/ a badazz assembly done right.
CHIP
'70 hemicuda, 575" Hemi, 727, Dana 60
'69 road runner, 440-6, 18 spline 4 speed, Dana 60
'71 Demon, 340, low gear 904, 8.75
'73 Chrysler New Yorker, 440, 727, 8.75
'90 Chevy 454SS Silverado, 476" BBC, TH400, 14 bolt
'06 GMC 2500HD LBZ Duramax
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Re: 4.15 stroke with a 7.1" rod?
[Re: Hemi_Joel]
#1549886
12/19/13 06:51 PM
12/19/13 06:51 PM
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Joined: Oct 2007
Posts: 4,210
New York
polyspheric
master
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master
Joined: Oct 2007
Posts: 4,210
New York
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It's not a "long rod", the ratio of 7.1:4.15 is shorter than the stock 440.
Boffin Emeritus
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Re: 4.15 stroke with a 7.1" rod?
[Re: Performance Only]
#1549888
12/19/13 08:09 PM
12/19/13 08:09 PM
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Joined: Apr 2011
Posts: 280
GEORGIA
barracuda7199
OP
enthusiast
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OP
enthusiast
Joined: Apr 2011
Posts: 280
GEORGIA
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Quote:
Quote:
I have tried to call dan nothing but voicemails and no return call. Haven't thought of that cab. Going to pull the motor Monday and see what's up with it. Have to do some calling around and see if there is a shop near by that can do that. It sucks trying to hotrod on a budget!!
I'm sorry you had trouble reaching me by phone. I field anywhere from 25-40 phone calls a day plus the time I'm working in the shop, taking care of our local walk-in customers etc. etc. I don't remember not returning any phone calls where a message was left on my voice mail, I'm usually pretty good about that, Did you leave one?
Again, sorry for your trouble.
Not trying to drag you thru the mud at all and I understand being busy! I'm not at the point of placing an order. Resend me your phone number and I will give you a call after the holidays. I would like to deal with someone close to me.
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