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915 Heads on a 70 440-6 Question........... #1610763 04/22/14 09:39 PM 04/22/14 09:39 PM
Joined: Mar 2004 Posts: 2,963 Wisconsin Stewpar OP master
Stewpar OP master Joined: Mar 2004 Posts: 2,963 Wisconsin	If I use 915 heads on my 1970 440-6, will all the mounting holes be the same for brackets, etc.? Thanks in advance. Admiration For Multiple Carburetor Vehicles...

Re: 915 Heads on a 70 440-6 Question........... [Re: Stewpar] #1610764 04/22/14 09:45 PM 04/22/14 09:45 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	yes live every 24 hour block of time like it's your last day on earth

Re: 915 Heads on a 70 440-6 Question........... [Re: Stewpar] #1610765 04/22/14 09:45 PM 04/22/14 09:45 PM
Joined: Feb 2005 Posts: 4,313 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,313 Prospect, PA	yes. I you have the six pack pistons, and a stockish cam, you might have detonation problems on pump gas

Re: 915 Heads on a 70 440-6 Question........... [Re: BSB67] #1610766 04/22/14 10:38 PM 04/22/14 10:38 PM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	same mounting points, you're ok. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: 915 Heads on a 70 440-6 Question........... [Re: Mr.Yuck] #1610767 04/23/14 06:52 AM 04/23/14 06:52 AM
Joined: Aug 2003 Posts: 12,291 Kent, Wa 340SHORTY Truck Nut
340SHORTY Truck Nut Joined: Aug 2003 Posts: 12,291 Kent, Wa	goforit I am truckless..

Re: 915 Heads on a 70 440-6 Question........... [Re: BSB67] #1610768 04/23/14 08:01 AM 04/23/14 08:01 AM
Joined: Nov 2005 Posts: 322 MERRILLVILLE, INDIANA S sunroof446 enthusiast
sunroof446 enthusiast S Joined: Nov 2005 Posts: 322 MERRILLVILLE, INDIANA	Quote: yes. I you have the six pack pistons, and a stockish cam, you might have detonation problems on pump gas I have 915 heads on my 70 six pack engine with ross flat top pistons 990 pin and eagle rods. at 0 deck height.looks bone stock. insane amount of power. i would highly recommend them. polish your combustion chamber to get rid of the hot spots. If you make the combustion chamber efficient it is possible to run it on premium if the engine is tuned properly. 8121631-chargerengineshot.jpg (49 downloads)

Re: 915 Heads on a 70 440-6 Question........... [Re: sunroof446] #1610769 04/23/14 08:26 AM 04/23/14 08:26 AM
Joined: Feb 2005 Posts: 4,313 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,313 Prospect, PA	Quote: Quote: yes. I you have the six pack pistons, and a stockish cam, you might have detonation problems on pump gas I have 915 heads on my 70 six pack engine with ross flat top pistons 990 pin and eagle rods. at 0 deck height.looks bone stock. insane amount of power. i would highly recommend them. polish your combustion chamber to get rid of the hot spots. If you make the combustion chamber efficient it is possible to run it on premium if the engine is tuned properly. Nice. What is your actual compression ratio, and your cranking cylinder pressure?

Re: 915 Heads on a 70 440-6 Question........... [Re: sunroof446] #1610770 04/23/14 10:50 AM 04/23/14 10:50 AM
Joined: Jan 2003 Posts: 24,562 Brookeville, Md Mr.Yuck Not enough dumb comments...yet
Mr.Yuck Not enough dumb comments...yet Joined: Jan 2003 Posts: 24,562 Brookeville, Md	Quote: Quote: yes. I you have the six pack pistons, and a stockish cam, you might have detonation problems on pump gas I have 915 heads on my 70 six pack engine with ross flat top pistons 990 pin and eagle rods. at 0 deck height.looks bone stock. insane amount of power. i would highly recommend them. polish your combustion chamber to get rid of the hot spots. If you make the combustion chamber efficient it is possible to run it on premium if the engine is tuned properly. I had ported, milled 516s w/ bigger valves w/ "six pack" pistons 528 solid and a 6 pack ran great until #4.

Re: 915 Heads on a 70 440-6 Question........... [Re: BSB67] #1610771 04/23/14 01:04 PM 04/23/14 01:04 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: Nice. What is your actual compression ratio, and your cranking cylinder pressure? X2 live every 24 hour block of time like it's your last day on earth

Re: 915 Heads on a 70 440-6 Question........... [Re: RapidRobert] #1610772 04/23/14 01:13 PM 04/23/14 01:13 PM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	I have them on my stock bottom 383, a true 10.3 with about 175psi CP. They are a great addition. i polished the chambers and the exhaust port and run less total advance nice boost over the 906 even with the smaller valve i left in.

Re: 915 Heads on a 70 440-6 Question........... [Re: ademon] #1610773 04/23/14 05:45 PM 04/23/14 05:45 PM
Joined: Feb 2005 Posts: 4,313 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,313 Prospect, PA	I've swapped out 906's for 915s with a good comp valve grind on several different cars. Usually improves et by 0.5 sec., and 5 mph on a typical, stockish street car. It is so much fun, I keep the heads around and let people use them. On one version of my 440 I ended up with 10.3: 1 CR and it would blow about 200 psi on the gauge. Would not run on pump gas in the Charger/3.23/stock converter. 175 and pulled timing, I could see that working.

Re: 915 Heads on a 70 440-6 Question........... [Re: BSB67] #1610774 04/23/14 10:44 PM 04/23/14 10:44 PM
Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada R RUNCHARGER I Live Here
RUNCHARGER I Live Here R Joined: Jan 2003 Posts: 15,976 Chilliwack B.C. Canada	5 MPH gain? Sheldon

Re: 915 Heads on a 70 440-6 Question........... [Re: RUNCHARGER] #1610775 04/24/14 12:02 AM 04/24/14 12:02 AM
Joined: Feb 2005 Posts: 4,313 Prospect, PA BSB67 master
BSB67 master Joined: Feb 2005 Posts: 4,313 Prospect, PA	yes

Re: 915 Heads on a 70 440-6 Question........... [Re: BSB67] #1610776 04/24/14 09:44 AM 04/24/14 09:44 AM
Joined: Aug 2012 Posts: 1,574 Lakeland FL F floridian pro stock
floridian pro stock F Joined: Aug 2012 Posts: 1,574 Lakeland FL	Mine, 915's were the stock head on my car. Original everything ( car in pic) bored 40 over, heads stock with new valves and seats on the exhaust, forged pistons, appx 9.5-1..... Tried to use the light springs in the distributor with pump gas.. didn't like that at all.. 8122745-5554552-vertbaseball2.jpg (29 downloads)

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