Re: Can I achieve 400hp with a late 70's 440 on a $2000 budget
[Re: Adam71Charger]
#2021006
02/27/16 11:39 PM
02/27/16 11:39 PM
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Joined: Nov 2009
Posts: 2,275 Desert Tracker
HYPER8oSoNic
top fuel
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top fuel
Joined: Nov 2009
Posts: 2,275
Desert Tracker
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A NO-BRAINER! Build it like a 67'-70' spec 440 Magnum, paying particular attention to cylinder pressure. Unless you have a set of "good" 906 heads laying around, stick with the stock heads save for a bowl cleanup and multi-angle valve job. You can raise compression by milling the cylinder heads, replacing the "stock" cam with the 440 Magnum spec. or a "fast acting cam" (moderate duration) that "pumps up" cylinder pressure, boring the cylinders and also installing pre-71' 440 Magnum/6 pack spec pistons. 440's can and will exceed the 400 hp mark with stock parts (66-70 HP's and Magnums, even the 325-350 horse versions too) and a few smart tuning tricks. Yours is a 180-220 horse version and it needs a bit more - compression and/or modern cam technology to reach the 400 bar. With ignition and carb tuning added in the mix and keeping the KISS principle (Keep It Simple Stupid) intact, the 2 grand would get you there. Check out some of the other posts concerning low-buck 440 builds and particularly pay close attention to some the articles in Mopar Muscle, Mopar Action and Engine Masters (past issues) on 440's written by Rick Ehrenberg and Steve Dulchich. They both are on Moparts, as well as Andy Finkheimer (Andy F). Between all three writers and the Moparts Archives, there is a WEALTH of info! Use the info wisely and good luck with the build!!
"Stupidity is Ignorance on Steroids" "Yeah, it's hopped to over 160" (quote by Kowalski in the movie Vanishing Point 1970 - Cupid Productions)
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Re: Can I achieve 400hp with a late 70's 440 on a $2000 budget
[Re: Adam71Charger]
#2021010
02/27/16 11:43 PM
02/27/16 11:43 PM
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Joined: Feb 2003
Posts: 21,318 Manitoba, Canada
DaytonaTurbo
Too Many Posts
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Too Many Posts
Joined: Feb 2003
Posts: 21,318
Manitoba, Canada
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I'm not spending it yet, need to mock up with the pulleys I have and see if it will work. I'm pretty sure my water pump and pulley are specifically for an a/c car. And I need a power steering With standard alternator and ps pump brackets you just won't use the outer groove on the pulleys. Also, if needed, shimming the pulleys fore and aft is not difficult.
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Re: Can I achieve 400hp with a late 70's 440 on a $2000 budget
[Re: Adam71Charger]
#2021580
02/28/16 11:37 PM
02/28/16 11:37 PM
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Joined: Nov 2003
Posts: 36,040 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,040
Lincoln Nebraska
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FlexHone and file fit plasma moly rings are an option. yes it is a ridge & needs to be removed (rent a ridge reamer & carefull use of it, more on that if/when you get ready to use it) for new rings to be installed on a rering (no rebore). You could take one of your old compression rings & square up the ends & use it to measure taper and out of round amt to a fair degree. iirc way back a Mopar mag mentioned that 346 heads may or may not be induction hardened (someone will clarify) as it was a transition period.
live every 24 hour block of time like it's your last day on earth
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Re: Can I achieve 400hp with a late 70's 440 on a $2000 budget
[Re: Adam71Charger]
#2021748
02/29/16 09:24 AM
02/29/16 09:24 AM
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Joined: Feb 2005
Posts: 4,311 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,311
Prospect, PA
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What are these pieces of plastic??
Cam timing gear teeth. It may have been replaced once already.
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Re: Can I achieve 400hp with a late 70's 440 on a $2000 budget
[Re: WO23Coronet]
#2021750
02/29/16 09:38 AM
02/29/16 09:38 AM
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Joined: Feb 2005
Posts: 4,311 Prospect, PA
BSB67
master
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master
Joined: Feb 2005
Posts: 4,311
Prospect, PA
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5th picture down at the 2 o'clock position it kind of looks like there's a couple of chunks missing from the piston crown? Those are original from the manufacturer. They are for piston orientation. Probably face the front of the block. Old school performance adder - if you reuse those pistons, turn them around so they face the back of the block, less friction due to the pin not being in the center of the piston, but you might get a little piston slap noise.
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Re: Can I achieve 400hp with a late 70's 440 on a $2000 budget
[Re: Adam71Charger]
#2021796
02/29/16 12:12 PM
02/29/16 12:12 PM
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Joined: Jun 2006
Posts: 5,161 CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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I would hone that and install new rings, the ridge doesn't look like its too big but hard to tell in pics.
The one piston probably looks crusty because it sat with the exhaust valve open, no big deal.
Last edited by GTX MATT; 02/29/16 12:13 PM.
Now I need to pin those needles, got to feel that heat Hear my motor screamin while I'm tearin up the street
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Re: Can I achieve 400hp with a late 70's 440 on a $2000 budget
[Re: DaytonaTurbo]
#2021919
02/29/16 03:59 PM
02/29/16 03:59 PM
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Joined: Feb 2005
Posts: 20,158 PA.
pittsburghracer
"Little"John
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"Little"John
Joined: Feb 2005
Posts: 20,158
PA.
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Timing gear chunks. Original timing gears were nylon coated. When you buy your cam buy a new timing set.
Typical for man bearings to have those grooves. If you're just doing a hone'n're-ring, I would replace main and rod bearings. If you desire, you can bring the crank to have a machine shop to have the journals inspected/polished. Add a high-volume oil pump too.
Yes, sounds like you have a ridge. I wouldn't worry about it. I would hone the cylinders with a ball hone then I'd give it a set of new cast rings, I prefer Hastings for this job. Cast rings are more forgiving to hone grit and bore taper than moly rings. If there is any ridge at all you can and probably will do damage to the rings. Imagine a brand new ring slamming against it. And why does everyone think they need a "high volume" oil pump.
1970 Duster Edelbrock headed 408 5.984@112.52 422 Indy headed small block 5.982@112.56 mph 9.42@138.27
Livin and lovin life one day at a time
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