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Pro's and Con's of the small block 587 casting heads? #798273 09/10/10 10:21 PM 09/10/10 10:21 PM
Joined: Jul 2006 Posts: 382 Roseville MN 7 72swgnr OP enthusiast
72swgnr OP enthusiast 7 Joined: Jul 2006 Posts: 382 Roseville MN	What are the pros and cons of using this head in a warmed up 360 compared to other stock small block heads? The heads will have the 2.02 intakes installed and have some porting work done to them.

Re: Pro's and Con's of the small block 587 casting heads? [Re: 72swgnr] #798274 09/10/10 10:45 PM 09/10/10 10:45 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	360 heads are pretty much a 360 head adding the porting and valves is what you make of them IMO the #308 are the coveted ones with a better exhast port just under a magnum head

Re: Pro's and Con's of the small block 587 casting heads? [Re: 72swgnr] #798275 09/10/10 10:47 PM 09/10/10 10:47 PM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	The only ones that are gonna make any differance in power are gonna be magnums, waaaaaaay better chambers, better ex ports and better ex ports, milled valve cover rails, 10 valve cover bolts, no water on ex manifold bolts... but beside the magnum no other 340-360 head will make significantly more power. For low end TQ the closed chamber 273 and 318 heads are better if built to take advantage of the quench but they will not make the top end power of the 340-360 heads. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: Pro's and Con's of the small block 587 casting heads? [Re: HotRodDave] #798276 09/10/10 10:58 PM 09/10/10 10:58 PM
Joined: May 2003 Posts: 15,487 Florida S scratchnfotraction I Live Here
scratchnfotraction I Live Here S Joined: May 2003 Posts: 15,487 Florida	what HRD said,mags dont have the heat cross over ports either R/T mags are good also you can get those EQ heads,that are mag heads with the old LA style rockers/intake bolt angle with the larger valves also, 1.92 IIRC

Re: Pro's and Con's of the small block 587 casting heads? [Re: scratchnfotraction] #798277 09/10/10 11:21 PM 09/10/10 11:21 PM
Joined: Jul 2006 Posts: 382 Roseville MN 7 72swgnr OP enthusiast
72swgnr OP enthusiast 7 Joined: Jul 2006 Posts: 382 Roseville MN	Thanks guys. I was told that I would have trouble with pinging at 10.5-1 compression using this head and KB 190 pistons.

Re: Pro's and Con's of the small block 587 casting heads? [Re: 72swgnr] #798278 09/11/10 12:19 AM 09/11/10 12:19 AM
Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska R RapidRobert Circle Track
RapidRobert Circle Track R Joined: Nov 2003 Posts: 36,041 Lincoln Nebraska	Quote: I was told that I would have trouble with pinging at 10.5-1 compression using this head and KB 190 pistons. Correct. I'd (highly) recommend what's been suggested & go w a closed ch mag head/get quench. You'll get much more for your money. live every 24 hour block of time like it's your last day on earth

Re: Pro's and Con's of the small block 587 casting heads? [Re: 72swgnr] #798279 09/11/10 11:18 AM 09/11/10 11:18 AM
Joined: Jan 2005 Posts: 12,419 Kalispell Mt. H HotRodDave I Live Here
HotRodDave I Live Here H Joined: Jan 2005 Posts: 12,419 Kalispell Mt.	Quote: Thanks guys. I was told that I would have trouble with pinging at 10.5-1 compression using this head and KB 190 pistons. That depends on cam and a few other things. Not a sure thing like a magnum with good quench. I am not causing global warming, I am just trying to hold off a impending Ice Age!

Re: Pro's and Con's of the small block 587 casting heads? [Re: HotRodDave] #798280 09/11/10 11:46 AM 09/11/10 11:46 AM
Joined: Jul 2006 Posts: 382 Roseville MN 7 72swgnr OP enthusiast
72swgnr OP enthusiast 7 Joined: Jul 2006 Posts: 382 Roseville MN	Quote: Quote: Thanks guys. I was told that I would have trouble with pinging at 10.5-1 compression using this head and KB 190 pistons. That depends on cam and a few other things. Not a sure thing like a magnum with good quench. cam specs are: Intake Duration at 050 inch Lift 251 Exhaust Duration at 050 inch Lift 257 Duration at 050 inch Lift 251 int./257 exh. Advertised Intake Duration 295 Advertised Exhaust Duration 307 Advertised Duration 295 int./307 exh. Intake Valve Lift with Factory Rocker Arm Ratio 0.564 in. Exhaust Valve Lift with Factory Rocker Arm Ratio 0.564 in. Valve Lift with Factory Rocker Arm Ratio 0.564 int./0.564 exh. Lobe Separation (degrees) 110 Comp recomends 10.1 compression with this cam. So hopefully we can get the compression between 10.1-10.5-1 so I can run 91-92 octane pump gas.

Re: Pro's and Con's of the small block 587 casting heads? [Re: 72swgnr] #798281 09/11/10 01:01 PM 09/11/10 01:01 PM
Joined: Jul 2003 Posts: 6,167 Maryland GO_Fish master
GO_Fish master Joined: Jul 2003 Posts: 6,167 Maryland	With the stock type Magnum rockers, you will pick up additional valve lift. They are 1.6 ratio instead of the LA 1.5 ratio. Probably not a problem and will help breathing, just be sure to check piston/valve clearance and valve train clearances during your build. You'll probably need to have the top of the valve guides milled down some. Scott B. "I'm a self-made man... I started with nothing, and I still have most of it!" 68 360 rusty B'cuda 'vert (GO Fish)13.59@ 98.72 mph 69 340 GTS stock 14.18@ 95.60 mph 01 5.9L Ram 1500 Quad Cab 4x4 01 3.5L 300M 16.23@ 86.97 mph

Re: Pro's and Con's of the small block 587 casting heads? [Re: GO_Fish] #798282 09/11/10 02:34 PM 09/11/10 02:34 PM
Joined: Jan 2003 Posts: 6,392 nielsville, minn. Q quickd100 master
quickd100 master Q Joined: Jan 2003 Posts: 6,392 nielsville, minn.	Don't worry so much son, when I'm done with it, it won't be pinging you'll be worrying about. It will be changing your 'depends'. Dad

Re: Pro's and Con's of the small block 587 casting heads? [Re: quickd100] #798283 09/12/10 11:56 AM 09/12/10 11:56 AM
Joined: Jul 2006 Posts: 382 Roseville MN 7 72swgnr OP enthusiast
72swgnr OP enthusiast 7 Joined: Jul 2006 Posts: 382 Roseville MN	You haven't been able to scare me with the Hemi yet...does that mean mines going to be quicker?

Re: Pro's and Con's of the small block 587 casting heads? [Re: 72swgnr] #798284 09/12/10 10:51 PM 09/12/10 10:51 PM
Joined: Jan 2003 Posts: 6,392 nielsville, minn. Q quickd100 master
quickd100 master Q Joined: Jan 2003 Posts: 6,392 nielsville, minn.	Quote: You haven't been able to scare me with the Hemi yet...does that mean mines going to be quicker? I'm glad you weren't with me when I got air under the front end. Don't worry it'll be plenty fast. Dad

Re: Pro's and Con's of the small block 587 casting heads? [Re: quickd100] #798285 09/12/10 10:58 PM 09/12/10 10:58 PM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	Those are the heads my 360 has on it. Runs pretty good with them, (Ask Dave about it.) Got them from Hughes. They won't go any farther than stage 1 on a 915 head because of marginal material to work with. Clean it, if it's Dirty. Oil it, if it Squeaks. But: Don't fix it, if it Works!

Re: Pro's and Con's of the small block 587 casting heads? [Re: MoparforLife] #798286 09/12/10 11:03 PM 09/12/10 11:03 PM
Joined: Sep 2004 Posts: 6,906 IL, Aurora A ademon master
ademon master A Joined: Sep 2004 Posts: 6,906 IL, Aurora	i think the stage 3 on the later head is about the same as a stage one on a x/j head, Flo wise

Re: Pro's and Con's of the small block 587 casting heads? [Re: ademon] #798287 09/13/10 05:03 AM 09/13/10 05:03 AM
Joined: Jan 2003 Posts: 25,200 Upper Midwest M MoparforLife Too Many Posts
MoparforLife Too Many Posts M Joined: Jan 2003 Posts: 25,200 Upper Midwest	All 340/360 heads are very close to the same other than the casting numbers, other than the early 915 & 894 2.02 heads, even emission heads.

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