440-1 pushrod clearances?
#739794
07/04/10 02:24 AM
07/04/10 02:24 AM
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Joined: Aug 2003
Posts: 43,157
Bend,OR USA
Cab_Burge
OP
I Win
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OP
I Win
Joined: Aug 2003
Posts: 43,157
Bend,OR USA
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I bought a set of 440-1 heads last year , trying to install them on my low deck stroker. I noticed witness marks on the heads from the intake pushrods, some angled and some not so angled. My questionis, is it neccessary to use offset roller lifters with the -1 heads or not? I ground the witness marks out on both heads and got lucky on one side, 3 out of the 4 don't rub now, not so lucky on the other sde, all four are rubbing enough to make the pushrods not turn with my fingers at TDC on the firing stroke  BTW, anyone not using offset lifters versus how many are using them 
Last edited by Cab_Burge; 07/04/10 02:26 AM.
Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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Re: 440-1 pushrod clearances?
[Re: Cab_Burge]
#739795
07/04/10 03:11 AM
07/04/10 03:11 AM
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Anonymous
Unregistered
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Anonymous
Unregistered
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i've never needed offset lifters with -1 heads.
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Re: 440-1 pushrod clearances?
[Re: B G Racing]
#739798
07/04/10 10:35 AM
07/04/10 10:35 AM
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Joined: Nov 2003
Posts: 2,503
Illinois
CRE2004
super gas
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super gas
Joined: Nov 2003
Posts: 2,503
Illinois
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Quote:
Just clearence them,we have to do alot of grinding on the 4 blocks cast in the lifter valley near the deck surface when using the offset lifters. 
I mill those pesky things out of the way when bushing the bores. Plenty of power by relocating the intake lifters, using the offset intake lifters, straightening up the pushrods and running a good stiff pushrod.
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Re: 440-1 pushrod clearances?
[Re: CRE2004]
#739799
07/04/10 11:08 AM
07/04/10 11:08 AM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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Quote:
Quote:
Just clearence them,we have to do alot of grinding on the 4 blocks cast in the lifter valley near the deck surface when using the offset lifters.
I mill those pesky things out of the way when bushing the bores. Plenty of power by relocating the intake lifters, using the offset intake lifters, straightening up the pushrods and running a good stiff pushrod.
I learn something new every day. I currently am runnng 440-1 heads on my 400 low deck with standard lifters (solid flat tappet) with no problem. But looking at my old pics, I can see where using offset roller lifters to straighten out the intake pushrods would move the pushrod toward the casting where I put white arrows.
Thanks for the heads up. 
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Re: 440-1 pushrod clearances?
[Re: CRE2004]
#739800
07/04/10 02:25 PM
07/04/10 02:25 PM
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Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
B G Racing
master
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master
Joined: Mar 2006
Posts: 9,910
Eighty Four, PA
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Quote:
Quote:
Just clearence them,we have to do alot of grinding on the 4 blocks cast in the lifter valley near the deck surface when using the offset lifters.
I mill those pesky things out of the way when bushing the bores. Plenty of power by relocating the intake lifters, using the offset intake lifters, straightening up the pushrods and running a good stiff pushrod.
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Re: 440-1 pushrod clearances?
[Re: B G Racing]
#739801
07/04/10 10:56 PM
07/04/10 10:56 PM
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Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
gregsdart
master
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master
Joined: Jan 2003
Posts: 9,996
Frostbitefalls MN (Rocky&Bullw...
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I have .180 offset lifters, needed to clearance the heads without them when I first ran them years ago. Noel Manton of Manton push rods told me to try for .010 clearance at the closest point, that being a minimum. The purpose of shooting for .010 max and min clearance is so that when the pushrod whips (and it will) the pushrod touches briefly, stopping the side motion or flex and calming down the pushrod.
8..603 156 mph best, 2905 lbs 549, indy 572-13, alky
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Re: 440-1 pushrod clearances?
[Re: 440Jim]
#739805
07/05/10 02:02 PM
07/05/10 02:02 PM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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Re: 440-1 pushrod clearances?
[Re: 440Jim]
#739807
07/05/10 03:26 PM
07/05/10 03:26 PM
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Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
BradH
Taking time off to work on my car
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Taking time off to work on my car
Joined: Jan 2003
Posts: 15,439
Val-haul-ass... eventually
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Quote:
I don't plan on running a roller cam, or offset lifters, in this engine...
Really?  Did you notice I dropped the price of my $chubeck$? 
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Re: 440-1 pushrod clearances?
[Re: BradH]
#739808
07/05/10 08:24 PM
07/05/10 08:24 PM
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Joined: Jan 2003
Posts: 16,925
NC
440Jim
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 16,925
NC
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This back-up motor is a pump gas short block, and I have my old Scott Brown solid, flat tappet, 272/280 cam and lifters for it that have been used in this block for hundreds of passes. The back-up heads are the EM 470 heads, epoxy ported Mopar Perf Stage VI, that flow about the same as my current Indy 440-1 heads.
I have picked up the used roller cam, used offset roller lifters, etc., just in case I want to try them in my current motor (during an off season refresh).
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Thanks for pointing out the possible problems on using them 440Jim 
