441 heads specs. and I have ran 624 casting heads also.

441 heads specs 1 pistons that required 64 cc heads but all I had was the old 441 head . No lead lubrication is present and the soft exhaust seat erodes away. Jun 30, 2005 · You are correct, the only difference in those heads and any other 441 head is GM put 1. -----375hp 78 Chevy truck 77 Chevy Nova Aug 3, 2001 · The "041" head was a 1969-1970 high performance head, with the same exact performance characteristics as both the "186" and "187" Camel (double) Hump heads. Otherwise it's more of a step sideways, not up. Or used on a dirt motor where the class requires a 76cc smogger head. Linda Ave. 02/1. They have 1. 460 ( crane cam diameter ) and have never hit water, when you are done the head will have a step in the valve spring seat so the shim must stay in the stock location, I also sand the outside bottom coil to get rid of the sharp edges so the spring does not cut into the corners Aug 18, 2005 · The plan is for compression not more than 9:1 with edelbrock performer power package as the main basis. 94/1. . It use will be a daily driver. 5 valves and the casting numbers are 3932441 or 3923441 (the fellow didn't know when I was speaking to him). Oct 15, 2002 · According to John Lingenfelter's book, the 441 casting is one of the preferred castings if you want to use a production GM head. The later 461 or 462 heads would be my choice for a nostalgic look and high performance. 50-inch valves. This is a quick walk through the history and evolution of some of the better production heads, but […] Jul 4, 2008 · They are an excellent replacement head for the mid-late 70's thinner castings like the 882. Sounds like the 186 and the small cam would be better if you are worried. 02 valve you should be fine with normal lift specs and std rockers, if it does touch Apr 1, 1999 · The 441 has a reputation as a good-flowing head among the production 76cc chamber heads. They will both go in the hole and tighten up just fine and produce a spark. 14014416 were originally installed on 80-86 267-305- and 350 cid engs. I have ran ported "76cc" heads many times and milled them all . Can't remember for sure. Sep 26, 2008 · It most cases the heads are not cost effective, they will need major machine work, seats & guides are common. I have head sets of 441 and 487 casting, and am undecided on which would be best for this motor. My 601 heads have 624 on the bottom of the intake runner. Jan 5, 2016 · 441 heads are good flowing heads. They are old style castings most use large s-plugs and have soft seats. If you are looking to have your Open Chamber heads reworked contact: Dynamic Cylinder Head LLC Attn; Nick German, 310 N. 50” valves. Every step of the small-block Chevy’s performance history has originated out of production parts. These heads are not compatible with un-lead gas. 041's are a 1. Sep 25, 2012 · That is called valve seat recession. The heads are better than low power crate engine heads. You just have to calculate the amount to make them usable. High-performance efforts have always begun by improving upon what the factory built, and the smallblock Chevy is the poster child for that effort. Feb 3, 2015 · "441" – 3932441. 6 valves in them. Jul 23, 2013 · The thing is, the 441 heads- while maybe being a bit better flowing than the 882- is still an open chamber smog head. The most basic aftermarket head or even the 300. Unit #10, Tea, SD 57064. A bit different intake port. Send Private Topic Jun 7, 2004 · The 993 heads were used in 72-73 Chevy 350s, many of them were the 250 horsepower version. Common if you are using pre 74 heads on a "working" engine. Nov 17, 2014 · New #060 assembled heads are advised. From your post those heads have been totally reworked. Oct 26, 2003 · "441" – 3932441. 50" valves, 76CC combustion chambers, DO have accessory holes, intake port volume should be 161CC's, exhaust port volume should be 61CC's. But I used them with a good piston to build compression and 2. User Info. General engine tech -- Drag Racing to Circle Track. 60 valves and dished pistons. These heads are very similar to the 441 and 493 400 small block head. 605-214-2248 nick@dynamiccylinderhead. 030" The 305 engines heads always made more power for me though. They may have been used on the 307 also. Are they good flowing heads? Jan 1, 2023 · These first three heads, the 441, 993, and 126 heads are all 72-76cc heads. (. 60 valves and made about 465 hp out of a 355 with them. Actually the 441 heads is one of the best heads made for the 350. 030 stock diameter valve shim located in stock position and I have cut 1. Jan 30, 2011 · I have been looking through the NHRA blue print specs and it shows that the 441 heads were on lower horsepower combos' and the 041 on higher HP combo's but with the difference of flat and domed pistons probably makes as much difference as any plus the chamber size. 60 valves, depending on application. 5 and 2. The flow numbers virtually overlap in the low-lift area with the 441 head exhibiting a slight flow advantage roughly Nov 21, 2004 · does anyone know the cc size of chevy's 441x head? Paraphrased from the "Chevrolet Small-block V8 Interchange Manual" by David Lewis: The 441 cylinder heads of '69 to '72 have a combustion chamber of about 74cc and have a chamber like the 1968 290 casting. Nothing magic or trick about them,, they are just another a reasonably good stock 35 year old head & putting 400+ in them in my opinion is really not the best plan when for another $200 or so you can get a new set of "street replacement" type heads with thicker castings that are less prone Jun 27, 2010 · Remember that the '461X heads were used in 1961, 1962 and 1963 with valve sizes 1. Jan 29, 2005 · The x means it is a modification of the original pattern. 50" valve 64cc head from the 1969 295hp 350 and the 1970 300hp 350,, same engine as none of the actual specs changed. 02x1. 50 only. Jul 25, 2012 · These heads,as per www. or buy new GMPP Bowtie vortecs. Mar 31, 2006 · I was running some 12. Nothing at all like the improvement you'd see from a L31 Vortec, that's Post: Which is the better head 441, 487, or 487x (Topic#227986) Impala_ss Forum Newbie Posts: 78 Loc: Bellevue, WA Reg: 04-09-09. 048 head gaskets, advanced the 270 cam 8 degrees and had no issues. They already have all the upgrades. When using 64cc heads,,,, Flat top 327 is about 9. Oct 1, 2006 · 441-A late-model smog head installed on 350-cid engines, the 441 casting has 76cc combustion chambers and 1. Mar 23, 2004 · I like the small chamber heads myself but they must be ported. Feb 22, 2018 · I'm looking to buy a set of 441 heads. Sep 3, 2004 · I've got a set of reworked 267 heads on a . I invested about 40 hours of port and bowl work with guages into them though. 00 Vortec head will out perform those heads by a great margin. 530" lift) The open chamber #441 heads are real good for a low cost, low cr 350 roots superchager motor with porting +2. I have also read in another book, whose title and author I cannot recall, that 441s run really good on a mild engine with a little pocket porting. 50 or 2. Aug 19, 2011 · The 441 head and the 487x heads use different type spark plugs, but the threads are the same (14mm) and the reach is close enough so that you may never notice a performance change - that's why they have worked for you guys in both motors. 94” and 1. They are more preferred over the 882 head due to their heavier casting. They yield average flow numbers, but respond to modifications just like any other small block head. Usually the receding seat loses spring pressure, reduced contact pressure and overheats then cracks the seat also. outintheshop cast no. All they really have going for them is a bit more meat in the castings and a bit more intake port volume. and they had 1. 030 over 350 that surprisingly work really good. It was available from the factor with both 1. 84 intake and 1. If 350hp is your goal, I think it's do-able with 441's. 441's are about the best flowing 76cc factory heads you can getif you was swapping from something like an 882 or 624 then you would see some noticeable gains. In todays world they are just one notch above a smog head. I calculated my compression on the edge of 10:1 and ran pump premium, with . This head was found on the 1969-1970 350 engines (255hp 350), it was a decent flowing large chamber head. The revised 461 heads were available starting in 1964 models with either 1. 5:1 compression Flat top 350 is about 10:1 dished 350 is about 9:1 Jan 18, 2007 · The nice thing about vortec heads is they don't need as much ignition timing as older style heads, so you can run more compression ratio using the same cam and fuel octane. and I have ran 624 casting heads also. By the looks of those heads they have been sitting around for a long time. If you're looking for good castings try and find the ones that are straight along the lower head bolt edge. It had 1. In this particular case, it lost out to the 882 head, but overall it's a decent head that responds well to Feb 6, 2010 · Don , when I cut for bigger springs I use a . 6 valves, just depended upon which vehicle GM put them in. Apr 5, 2019 · 441 heads. Or you can use a lower grade of fuel with out any problems Vortec heads run well with about 32 to 34 degrees of total timing where older style heads require 38 to 40. Although the intake ports are only 155cc's, these heads deliver Apr 7, 2001 · As far as swapping from 441's to 441x's, I wouldnt mess with ityou would be lucky to gain 10hp, unless you do some porting. These heads used to be sought after by the roundy round racers that were limited to stock heads, as they do flow a bit better than comparable heads of that era. Jun 25, 2021 · The 441 with no X was a 73 CC chamber for the 350 , the X version was for the 400 with much more like a 80 CC chamber. valves. com The data on this page is for information only. Better than 882. It also is a 64 cc combustion chamber. 038 and 2. On . The 441x was cast / machined for the 400s will have the needed steam holes and will in stock form have 1. 50 exh. Which heads might be considered best of the two sets for this build. That is the benefit of aftermarket heads. egtsio eakm lhkza bnyibw ghvzfbzk mftfy iuncpgpg tydwrxep exkm msil