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Re: how high can a/have you seen a 440 wind up?
[Re: gregsdart]
#1681830
10/09/14 10:32 AM
10/09/14 10:32 AM
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Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
an8sec70cuda
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 13,354
Marion, South Carolina [><]
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My Indy headed 446" RB I shift at 7200 rpm.
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: how high can a/have you seen a 440 wind up?
[Re: cdoublejj]
#1681832
10/16/14 07:26 AM
10/16/14 07:26 AM
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Joined: Jan 2005
Posts: 4,862
the frozen wastes...
Pale_Roader
Swears too much
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Swears too much
Joined: Jan 2005
Posts: 4,862
the frozen wastes...
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Quote:
wow, lots of replies!!! Just cool to get an idea of whats possible. it seems 6500-7k is NOT the absolute limit, which is pretty cool.
Make sure the oiling and the valvetrain keep up, sort out all the factory tolerances (BALANCE!) and really, whats the limit? Its a short stroke/long rod engine thats legendary for its fortitude. You can buy enough head these days to wing that sucker past 10K i'm sure, its really the HP limit on the block thatll keep the spin lower. Hard to get way up there without making some serious HP.
Think ov it this way... block integrity aside, its no different than a 426 Hemi, internally. Just adding the Hemi head/stuff suddenly these are easy 8K+ engines.
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Re: how high can a/have you seen a 440 wind up?
[Re: Pale_Roader]
#1681833
10/18/14 05:12 AM
10/18/14 05:12 AM
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Joined: Jul 2014
Posts: 68
USA MO
cdoublejj
OP
member
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OP
member
Joined: Jul 2014
Posts: 68
USA MO
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Quote:
Quote:
wow, lots of replies!!! Just cool to get an idea of whats possible. it seems 6500-7k is NOT the absolute limit, which is pretty cool.
Make sure the oiling and the valvetrain keep up, sort out all the factory tolerances (BALANCE!) and really, whats the limit? Its a short stroke/long rod engine thats legendary for its fortitude. You can buy enough head these days to wing that sucker past 10K i'm sure, its really the HP limit on the block thatll keep the spin lower. Hard to get way up there without making some serious HP.
Think ov it this way... block integrity aside, its no different than a 426 Hemi, internally. Just adding the Hemi head/stuff suddenly these are easy 8K+ engines.
now have heard talk aobut making too muhc HP on the stock block but, as far as i know good cooling oiling and balance should solve that.
HOWEVER i have been doing a wee bit of research on girdles. there are 2 styles, that i know of. Tradition and BCR. BCR seems to be the only one that makes end caps that are made to integrate with the griddle better.
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Re: how high can a/have you seen a 440 wind up?
[Re: mopar346]
#1681834
10/18/14 07:17 AM
10/18/14 07:17 AM
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Joined: Mar 2007
Posts: 3,277
West Coast, USA
jbc426
master
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master
Joined: Mar 2007
Posts: 3,277
West Coast, USA
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Quote:
Quote:
7500 with exhaust manifolds 
Nice, and stock too!
...with just a little loss in power due to the lack of headers and good exhaust, 75 to 110 hp?
1970 Plymouth 'Cuda #'s 440-6(block in storage)currently 493" 6 pack, Shaker, 5 speed Passon, 4.10's
1968 Plymouth Barracuda Convertible 408 Magnum EFI with 4 speed automatic overdrive, 3800 stall lock-up converter and 4.30's (closest thing to an automatic 5 speed going)
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Re: how high can a/have you seen a 440 wind up?
[Re: Cab_Burge]
#1681836
10/20/14 03:26 AM
10/20/14 03:26 AM
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Joined: Jul 2014
Posts: 68
USA MO
cdoublejj
OP
member
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OP
member
Joined: Jul 2014
Posts: 68
USA MO
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Quote:
Think ov it this way... block integrity aside, its no different than a 426 Hemi, internally. Just adding the Hemi head/stuff suddenly these are easy 8K+ engines.
now have heard talk aobut making too muhc HP on the stock block but, as far as i know good cooling oiling and balance should solve that.
HOWEVER i have been doing a wee bit of research on girdles. there are 2 styles, that i know of. Tradition and BCR. BCR seems to be the only one that makes end caps that are made to integrate with the griddle better.
The 440 blocks are no where near as strong in the main webbing as the 426 Street Hemi are with the thicker main webbing and three center mains crossbolted  OP, aftermarket main girdles are a band aid that only add rigdity to the main bolts, nothing else   Your best bet for additional RPM is to use a new race block and Titainum intake valves for spinning motor above 7500 RPM regulary  The 440 block main webbing and main caps are very weak, 400 blocks are better  There are a bunch of things that need to be very good and coordinated together to get a motor to live and make great power above 7000 Back in 1968 or 1969 Don Purdhome switch from a straight set of 3/8 diameter pushrods to a set of D&D single tapered 7/16 pushrods and pickup his old Top Fuel motor 1200 + RPM   They ended up going from 7300 RPM to 8500 RPM and where able to lean the fuel flow down 20 % Valve train stability is the key to high RPM The stock 440 blocks are very weak in the main webbing, the 400 blocks are a lot better, especailly if you swap the main caps and go to main studs
you should have look at BCR, they understand it's just double stretching the main bolts.
http://www.bcrproducts.com/caps_and_girdle_system.html
more than that why should there be any difference in force applied than stock? they only way i can see it is if the crank slinging out out more vibrations...which good balancing should get rid of.
for every action there is an equal and oppsite reaction.
why does every one ay the old 440s are so good? fan boy ism? also where can i look at aftermarket blocks?
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