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440 valve to piston clearance question #193051 01/14/09 07:43 AM 01/14/09 07:43 AM
Joined: Oct 2007 Posts: 100 Sweet Home, Oregon R RainBoKatchr OP member
RainBoKatchr OP member R Joined: Oct 2007 Posts: 100 Sweet Home, Oregon	I have a low-mileage '73 440 out of a motorhome that I am going to put in my '71 Charger. It has flat-top pistons with no valve reliefs, and does anyone know what camshaft lift I can expect to be able to safely run in this setup? I was also thinking of milling the heads to get more compression, which of course will limit clearance further. Dave

Re: 440 valve to piston clearance question [Re: RainBoKatchr] #193052 01/14/09 10:26 AM 01/14/09 10:26 AM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	.484" MP will clear live every 24 hour block of time like it's your last day on earth

Re: 440 valve to piston clearance question [Re: RainBoKatchr] #193053 01/14/09 11:33 AM 01/14/09 11:33 AM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	A 73 440 will have the pistons about a 1/2 mile down in the hole. Okay actual is more like .170-.180 in the hole. You are not going to have trouble with valve clearance. Unless you want a total pig of a 440 on the street, don't pick a cam with more than 224* of duration @050 on the intake side.

Re: 440 valve to piston clearance question [Re: DaytonaTurbo] #193054 01/14/09 01:16 PM 01/14/09 01:16 PM
Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,040 Lincoln Nebraska	Quote: a total pig of a 440 on the street, Excellent point, between having low comp and no quench, a big cam is going to not give you what you are looking for. I'd mill the heck out of the heads & fyi some 73 model year heads had hardened seats & some didn't. Or consider some better ones. live every 24 hour block of time like it's your last day on earth

Re: 440 valve to piston clearance question [Re: RapidRobert] #193055 01/14/09 01:25 PM 01/14/09 01:25 PM
Joined: Feb 2008 Posts: 2,648 GA Boosted master
Boosted master Joined: Feb 2008 Posts: 2,648 GA	we have basicaly the same setup but I will be running 906 heads that have been cut .030 My motor is out of a 72 motor home.. Stock bottom end.. I am going wiht the HL285 from Comp... And it will also depend on convertor, carb and gear. This is going in my 2600lb dart... 2011 RAM3500 1967 Fastback Barracuda with some go fast goodies.

Re: 440 valve to piston clearance question [Re: RainBoKatchr] #193056 01/14/09 04:55 PM 01/14/09 04:55 PM
Joined: May 2004 Posts: 270 Washington, IL H Hughes enthusiast
Hughes enthusiast H Joined: May 2004 Posts: 270 Washington, IL	If you want to build alittle more cylinder pressure and gain some torque you may want to look at one of our WhipLash cams. Kevin @ Hughes 4947843-TheHughesLogofourth.jpg (85 downloads) www.hughesengines.com

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