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budget 440 ... 915 heads? talk me out of it #1041795 07/27/11 11:16 PM 07/27/11 11:16 PM
Joined: Jan 2003 Posts: 4,323 NY NY 3 340duster340 OP master
340duster340 OP master 3 Joined: Jan 2003 Posts: 4,323 NY NY	i have a 440 with stock forged crank and LY rods, haven't had it apart yet, but i was planning on rebuild on the cheap with a set of 915 heads. good idea / bad idea? is it worth putting any $ into the 915 heads or should i go right for a set of source heads? 1966 Dart GT ...down to only 1 mopar for the first time in 15 years!

Re: budget 440 ... 915 heads? talk me out of it [Re: 340duster340] #1041796 07/28/11 12:15 AM 07/28/11 12:15 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	Get an estimate of what it would cost to do the heads. So you buy new valves, springs, locks and retainers for it and find out how much it'll cost to clean them, do the guides as needed, cut the valve seats and install hardened exhaust seats if you want them. Cost adds up quick. Sometimes the best bang for your buck is checking out the for sale section here to see if you can score a good ready to run set of stock heads that someone else already spent the money on rebuilding.

Re: budget 440 ... 915 heads? talk me out of it [Re: 340duster340] #1041797 07/28/11 12:21 AM 07/28/11 12:21 AM
Joined: Jan 2011 Posts: 492 Kansas BEINGmeISaCRIME mopar
BEINGmeISaCRIME mopar Joined: Jan 2011 Posts: 492 Kansas	Some, but not all people have had valves drop out of 440source heads, daytona I THINK has good luck with them, I'm sure he'll chime back in. The machine shop where I'm getting my 440 rebuilt at told me to replace the valve locks as well as the spring cup/locators. But either way they make a good seat of heads for a good price.

Re: budget 440 ... 915 heads? talk me out of it [Re: BEINGmeISaCRIME] #1041798 07/28/11 12:33 AM 07/28/11 12:33 AM
Joined: Dec 2004 Posts: 397 Illinois Morris'Mopars enthusiast
Morris'Mopars enthusiast Joined: Dec 2004 Posts: 397 Illinois	Depends on what you want out of your engine. If you are looking at port work...they are not the best to work with when porting. You can do less port work on a set of 346 or 452 heads and get a better flow. I realize that these heads are not a closed chamber like the 915's..but again it all depends on what you are after with the engine...my www.morrismopars.com

Re: budget 440 ... 915 heads? talk me out of it [Re: BEINGmeISaCRIME] #1041799 07/28/11 12:34 AM 07/28/11 12:34 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	Correct, I have had no problems with my source heads. I have a set of the first production batch heads. Source did send me a new set of valve locks which I installed because supposedly some of the first production run heads had issues with the locks. I will be pulling mine off my 440 sometime this august to do a new motor build so I'll check them out again at that time.

Re: budget 440 ... 915 heads? talk me out of it [Re: DaytonaTurbo] #1041800 07/28/11 08:01 AM 07/28/11 08:01 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	nothing wrong w/ 915 heads, just check them out before you use them. If you have to put over $500 in them you might as well buy something done. You can find good deals on re-manned iron heads online. [IMG]http://i66.tinypic.com/pui5j.jpg[/IMG] Coming soon!!!!

Re: budget 440 ... 915 heads? talk me out of it [Re: Mr.Yuck] #1041801 07/28/11 08:47 AM 07/28/11 08:47 AM
Joined: Jan 2003 Posts: 4,323 NY NY 3 340duster340 OP master
340duster340 OP master 3 Joined: Jan 2003 Posts: 4,323 NY NY	Thanks all for the input...i kind of want to put this motor together as cheap as possible just to hey the car running and driving. Since I already have the 915s I,ll see if the are worth saving. I also have a pile of 906 heads. 1966 Dart GT ...down to only 1 mopar for the first time in 15 years!

Re: budget 440 ... 915 heads? talk me out of it [Re: DaytonaTurbo] #1041802 07/28/11 08:47 AM 07/28/11 08:47 AM
Joined: Jan 2003 Posts: 21,072 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,072 Niles , Ohio	My Stealths have been on 4 years.They are the first ones also.I changed the locks,retaniers and sorings for my .588 Comp solid cam.Machinist also back cut valves and cleaned them up a bit.No problems at all its street/ strip.Rocky Chrysler Firepower

Re: budget 440 ... 915 heads? talk me out of it [Re: therocks] #1041803 07/28/11 09:46 AM 07/28/11 09:46 AM
Joined: Aug 2005 Posts: 4,799 ILL M MLR426 master
MLR426 master M Joined: Aug 2005 Posts: 4,799 ILL	If you want a decent head and stay cheap, rebuild the 915's it can still be cheaper in the end and you can take advantage of the closed chamber for compression. If cost is your concern. It really comes down to just how good a shape your heads are in ? I wouldn't even consider a 346 head. logan426

Re: budget 440 ... 915 heads? talk me out of it [Re: MLR426] #1041804 07/28/11 09:53 AM 07/28/11 09:53 AM
Joined: Jul 2008 Posts: 30,430 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,430 Florida STAYcation	A lower rpm GRUNT BUILD .. the 915's are fine. But if you need guides and valves..... and the head-guy is pricey ...I would go-with the 440S heads. BUT THEN the "effective" compression ratio will be cut-down using the alum heads.

Re: budget 440 ... 915 heads? talk me out of it [Re: BeEtLeJuIcE !] #1041805 07/28/11 02:38 PM 07/28/11 02:38 PM
Joined: Jan 2003 Posts: 21,072 Niles , Ohio T therocks oh wait.but hey.lets see.oh yeah.
therocks oh wait.but hey.lets see.oh yeah. T Joined: Jan 2003 Posts: 21,072 Niles , Ohio	My old irons heads were decent.I had them redone first.200 bucks for valves,new guides,seals plus the springs etc whic I needed because of my cam.I had 500 in machine work and my guy is really reasonable on labor.He did open them up a bit but not a full port.I had almost 800 in parts and labor not including the springs,ertainers and keepers.The Stealths were a grand all new just upgraded the springs etc.They are lighter and flow more.Rocky Chrysler Firepower

Re: budget 440 ... 915 heads? talk me out of it [Re: BeEtLeJuIcE !] #1041806 07/28/11 02:48 PM 07/28/11 02:48 PM
Joined: Feb 2003 Posts: 21,318 Manitoba, Canada DaytonaTurbo Too Many Posts
DaytonaTurbo Too Many Posts Joined: Feb 2003 Posts: 21,318 Manitoba, Canada	Quote: BUT THEN the "effective" compression ratio will be cut-down using the alum heads. That myth has been dyno proven to be nothing but an old wives tale.

Re: budget 440 ... 915 heads? talk me out of it [Re: DaytonaTurbo] #1041807 07/28/11 03:09 PM 07/28/11 03:09 PM
Joined: Jul 2008 Posts: 30,430 Florida STAYcation BeEtLeJuIcE ! The village idiot's idiot
BeEtLeJuIcE ! The village idiot's idiot Joined: Jul 2008 Posts: 30,430 Florida STAYcation	Quote: Quote: BUT THEN the "effective" compression ratio will be cut-down using the alum heads. That myth has been dyno proven to be nothing but an old wives tale. Maybe up in cAnUkAdA ....but not here ! ...

Re: budget 440 ... 915 heads? talk me out of it [Re: BeEtLeJuIcE !] #1041808 07/28/11 04:14 PM 07/28/11 04:14 PM
Joined: Mar 2005 Posts: 2,172 Ohio T theclutcher top fuel
theclutcher top fuel T Joined: Mar 2005 Posts: 2,172 Ohio	915's imo

Re: budget 440 ... 915 heads? talk me out of it [Re: theclutcher] #1041809 07/28/11 04:35 PM 07/28/11 04:35 PM
Joined: Jan 2003 Posts: 16,376 D dogdays I Live Here
dogdays I Live Here D Joined: Jan 2003 Posts: 16,376	The aluminum head old wives' tale has been disproved down here too with back-to-back tests with identical heads in both aluminum and cast iron with the same power outputs. However you can run 1/2 point more compression with the Al heads which is worth something. Thought exercise: Name one high performance engine in current production with a cast iron head. R.

915's [Re: dogdays] #1041810 07/28/11 11:18 PM 07/28/11 11:18 PM
Joined: Jan 2003 Posts: 7,861 Witness Protection Program Kudakidd master
Kudakidd master Joined: Jan 2003 Posts: 7,861 Witness Protection Program	Bang for the buck = 915's. I have them on my 440 and couldn't be happier. 2.08 I, 1.74 E and 76 cc chambers. Low end torque is impressive.

Re: 915's [Re: Kudakidd] #1041811 07/28/11 11:48 PM 07/28/11 11:48 PM
Joined: Jan 2003 Posts: 4,323 NY NY 3 340duster340 OP master
340duster340 OP master 3 Joined: Jan 2003 Posts: 4,323 NY NY	Quote: Bang for the buck = 915's. I have them on my 440 and couldn't be happier. 2.08 I, 1.74 E and 76 cc chambers. Low end torque is impressive. Did you do any work to them or just stock rebuild. 1966 Dart GT ...down to only 1 mopar for the first time in 15 years!

Re: 915's [Re: 340duster340] #1041812 07/29/11 02:40 AM 07/29/11 02:40 AM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	Got a set of 915 on a mostly stock 383, i just pocket port them, they picked up the power over the 906.

915's [Re: 340duster340] #1041813 07/29/11 11:28 AM 07/29/11 11:28 AM
Joined: Jan 2003 Posts: 7,861 Witness Protection Program Kudakidd master
Kudakidd master Joined: Jan 2003 Posts: 7,861 Witness Protection Program	Quote: Quote: Bang for the buck = 915's. I have them on my 440 and couldn't be happier. 2.08 I, 1.74 E and 76 cc chambers. Low end torque is impressive. Did you do any work to them or just stock rebuild. Obviously new valves, then just gasket matched the intake and exhaust ports.

Re: budget 440 ... 915 heads? talk me out of it [Re: 340duster340] #1041814 07/29/11 11:58 PM 07/29/11 11:58 PM
Joined: Jan 2003 Posts: 75,012 U.S.S.A. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,012 U.S.S.A.	You obviously want to use the source heads, just sell the 915's to someone that wants to use them and buy the other heads.

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