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Re: Big block cylinder head castings post [Re: Dunnuck Racing] #1641014 07/31/14 10:32 AM 07/31/14 10:32 AM
Joined: Jan 2003 Posts: 75,326 A gulag near you. JohnRR I Win
JohnRR I Win Joined: Jan 2003 Posts: 75,326 A gulag near you.	Quote: When somebody asks about port size, it is simply easier to say standard 440 port size, or Max wedge port size than it is to list every engine that came with a non Max Wedge port. Keith That is what I think when someone asks about port size too. Thanks for sharing the info.

Re: Big block cylinder head castings post [Re: sasquatch] #1641015 07/31/14 12:10 PM 07/31/14 12:10 PM
Joined: Jul 2005 Posts: 647 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 647 Graz, Austria	Quote: Thought you would like to see some internals. INTAKE view... They look pretty for sure..

Re: Big block cylinder head castings post [Re: Dunnuck Racing] #1641016 08/01/14 11:08 AM 08/01/14 11:08 AM
Joined: Aug 2006 Posts: 610 long time lurker, short time p... P PorkyPig mopar
PorkyPig mopar P Joined: Aug 2006 Posts: 610 long time lurker, short time p...	Next time one of you guys who are in contact w/ the Proheaders folks get to bring it up, how about they "find" a modern chamber design for this head. I don't get it why they go to the trouble to "fine tune" something and ignore the obvious technical throwback. Or maybe come up with an "improved" Indy EZ-type head where the stupid lip in the intake runner is filled in so it can actually be used as a standard-port head.

Re: Big block cylinder head castings post [Re: Dunnuck Racing] #1641017 08/01/14 10:37 PM 08/01/14 10:37 PM
Joined: May 2005 Posts: 598 NC, USA D davenc mopar
davenc mopar D Joined: May 2005 Posts: 598 NC, USA	The off the seat flow on the exhaust side is better on the E-RPM both in stock and ported form. Is this low flow area not as important on the exhaust side? Any thoughts on why the RPM is better in this area?

Re: Big block cylinder head castings post [Re: davenc] #1641018 08/04/14 12:05 AM 08/04/14 12:05 AM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing OP master
Dunnuck Racing OP master Joined: Mar 2007 Posts: 3,300 Northern Indiana	The way the top cut transitions into the chamber is is a little different. I personally wouldn't worry about it if I was going to spec a cam for the combination. The low lift exhaust flow would make scavenging a little easier but could easily be made up for. It wouldn't take much to make it match the RPM head there. The Sidewinder could easily go bigger than I have done here but these are at a level I want for the street engine they go with. Keith www.dunnuckracing.com

Re: Big block cylinder head castings post [Re: Dunnuck Racing] #1641019 09/11/14 03:45 AM 09/11/14 03:45 AM
Joined: Jul 2005 Posts: 647 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 647 Graz, Austria	Keith, how's the testing coming along?

Re: Big block cylinder head castings post [Re: DGS] #1641020 09/12/14 01:05 AM 09/12/14 01:05 AM
Joined: Mar 2005 Posts: 2,644 North Carolina sasquatch master
sasquatch master Joined: Mar 2005 Posts: 2,644 North Carolina	Ours is going fine. We have sold to date almost 20 sets with ZERO returns or problems. While we have several running at the moment we have not dynoed one yet but I should have that chance within the next two weeks. Nothing crazy but should be pretty sporty. Todd www.mopartsracing.com

Re: Big block cylinder head castings post [Re: sasquatch] #1641021 09/12/14 06:09 AM 09/12/14 06:09 AM
Joined: Jul 2005 Posts: 647 Graz, Austria DGS mopar
DGS mopar Joined: Jul 2005 Posts: 647 Graz, Austria	Quote: Ours is going fine. We have sold to date almost 20 sets with ZERO returns or problems. While we have several running at the moment we have not dynoed one yet but I should have that chance within the next two weeks. Nothing crazy but should be pretty sporty. Todd Are these ported or ootb? Looking forward to seeing a few numbers

Re: Big block cylinder head castings post [Re: sasquatch] #1641022 09/14/14 03:20 PM 09/14/14 03:20 PM
Joined: Jan 2003 Posts: 525 Shannonville, Ont Blown 68 R/T mopar
Blown 68 R/T mopar Joined: Jan 2003 Posts: 525 Shannonville, Ont	Keith/Todd Been looking at these & ProMaxx, was wondering if they would hold up to a high spring pressure(750+) Procharger boosted application. Wondering if the weak link would be in the shaft mounts??

Re: Big block cylinder head castings post [Re: Blown 68 R/T] #1641023 09/14/14 10:10 PM 09/14/14 10:10 PM
Joined: Oct 2009 Posts: 92 south carolina U.S. D DOUGG member
DOUGG member D Joined: Oct 2009 Posts: 92 south carolina U.S.	I bought a set (sidewinders) from marsh performance 3 weeks ago. Installed them on mild 383/ 9.5 comp,headers,750 holley, 478/494 lift cam(mild).WOW!!! Couldn't be be happier with my setup. 65 b-body/373 gears. This thing is now the beast I wanted it to be. [

Re: Big block cylinder head castings post [Re: DOUGG] #1641024 09/14/14 11:25 PM 09/14/14 11:25 PM
Joined: Mar 2005 Posts: 2,644 North Carolina sasquatch master
sasquatch master Joined: Mar 2005 Posts: 2,644 North Carolina	If you go back up this thread to the cutaways, I believe with a .060 cup or locator you could run 750 open pressure as far as the spring seat is concerned. That is a load on ANY aftermarket heads stands. You can look at the structure under them but that is a lot. You could helicoil them ( no big deal) and help a little. Heck even the VIctors had trouble with that with that kind of spring pressure. Todd www.mopartsracing.com

Re: Big block cylinder head castings post [Re: DGS] #1641025 09/15/14 10:04 AM 09/15/14 10:04 AM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing OP master
Dunnuck Racing OP master Joined: Mar 2007 Posts: 3,300 Northern Indiana	Sorry guys, I left Wednesday evening for Monster Mopar at Norwalk and haven't been on here much. I have a test engine on the dyno with iron heads and will be doing some back to back testing soon. Keith www.dunnuckracing.com

Re: Big block cylinder head castings post [Re: Dunnuck Racing] #1641026 10/14/14 10:38 PM 10/14/14 10:38 PM
Joined: Jan 2003 Posts: 525 Shannonville, Ont Blown 68 R/T mopar
Blown 68 R/T mopar Joined: Jan 2003 Posts: 525 Shannonville, Ont	Any updates on these Sidewinders Keith?

Re: Big block cylinder head castings post [Re: Blown 68 R/T] #1641027 10/14/14 10:53 PM 10/14/14 10:53 PM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing OP master
Dunnuck Racing OP master Joined: Mar 2007 Posts: 3,300 Northern Indiana	I'm testing a few different combinations using the Sidewinder heads. First up was a back to back with a mild hydraulic cam versus 915 heads. I'm testing them in ported form right now, with a couple different solid camshaft. I'll be posting results in the next day or so. But I can say, so far so good! They are looking like a great option. Keith 8300627-NCM_0554.JPG (529 downloads) www.dunnuckracing.com

Re: Big block cylinder head castings post [Re: Blown 68 R/T] #1641028 10/14/14 10:57 PM 10/14/14 10:57 PM
Joined: Mar 2007 Posts: 3,300 Northern Indiana Dunnuck Racing OP master
Dunnuck Racing OP master Joined: Mar 2007 Posts: 3,300 Northern Indiana	In the next day or so, I will post some results up. I have been testing a few different combinations with them and am finishing up now with ported heads and a couple of solid cams. So far they are looking like a real nice option! Keith 8300633-NCM_0554.JPG (367 downloads) www.dunnuckracing.com

Re: Big block cylinder head castings post [Re: Dunnuck Racing] #1641029 11/07/14 05:11 PM 11/07/14 05:11 PM
Joined: Oct 2007 Posts: 20 Easton, Minnesota G gpuller member
gpuller member G Joined: Oct 2007 Posts: 20 Easton, Minnesota	Are these angled plug heads? Any troubles with ordinary headers fitting?

Re: Big block cylinder head castings post [Re: Dunnuck Racing] #1641030 02/07/15 03:52 PM 02/07/15 03:52 PM
Joined: Apr 2013 Posts: 345 Nebraska 4 451Cuda enthusiast
451Cuda enthusiast 4 Joined: Apr 2013 Posts: 345 Nebraska	Quote: In the next day or so, I will post some results up. I have been testing a few different combinations with them and am finishing up now with ported heads and a couple of solid cams. So far they are looking like a real nice option! Keith Any more updates on these heads? Really interested.

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