898 sbc heads specs. 5 posts · Joined 2018. 9. Both are standard 160cc intake runner size with smogger 76cc chambers so to build some compression it will need a flat top piston that's not too far down in the hole at top dead center to get the compression ratio in the 9:1 range. Should pickup 30HP or more over the 487s. For instance 333882, 3238882, etc. The 291 was Std Equipment on a 67/68 Z28 290Hp 302 and 295/370Hp 327's. Nov 3, 2017 · 70lt1z28. Chevy V8 SBC Block and Head Casting Numbers. They're actually around 218cc's, only cost around $1600 on ebay, and should be worth another 30HP beyond the AFR 210's with the offset valves. 0L truck), and 799 (as a stand-in for the hallowed 243) heads. Anybody know where I can find info on SBC head #458642 ? After searching all I can find is that it is a 350 head betwen 1975 and 1984. . They were found on 1970 LT-1 engines. 569 posts · Joined 2001. 88. I Goodwrench crate motor, Hecho en Mexico: 25534351C: 04-up: 2. Chevy V8 BBC Block and Head Casting Numbers. 631-816-4911. Aug 14, 2005 · topfuel. and not every small valve small block head is junk- the 305 HO heads that end with the numbers 416 flow pretty well for stock heads and the small chambers will bump a 350 with dish pistons up to a respectable compression ratio in the 9. Your list appears essentially correct with the possible exception of the 350hp/350 L46 on the Corvette. 3. PN 31400006 is used on applications where you have a 1987-on 350, but with the older-style valve covers, with bolts on the top and bottom flanges. DoubleVision said: Factory 360 and 375 horse heads. You will have to shim the exhaust spring seats,Check for stock rocker to stud clearance, most Jan 29, 2005 · 11400 posts · Joined 2002. 00CR stock. The LS1 engine specs and information here is for the stock LS1 engine. 11400 posts · Joined 2002. This budget friendly head is perfect for your 350 to 400 Cubic Inch operating below 6000 RPM. Casting number is 191 or 193 on these heads. cam and stock rocker arms. The 441x was cast / machined for the 400s will have the needed steam holes and will in stock form have 1. 492 castings came on high power small blocks, but these were straight plug heads. 94 intake and 1. By Bobby Kimbrough April 13, 2015. "492" – 3991492. Post: 898 heads???? (Topic#216990) what are they?? would they be good for a 88 k1500 with a 350?? I doubt they are Vortec style intake mounting, probably a stock 350 replacement head. If you're wanting to run a more aggressive cam check the 1. The compression is in the pistons normal production 350s would have deep dish pistons keeping the compression pretty low. Ask them to drill the 400 steam holes. 461 heads. These heads were used in various SB Chevy's for the 72-73 production years. pdq67. I have had a few 461 castings, I prefer the 462 and the 186. 530 CC's. Sep 28, 2007 · was just wondering what anyone thinks about these heads 3998993 (68-76) There not the best heads for sure, but depending upon your budget, you can actually get some surprising results. Actually a good piece of equipment for the time! Flow rates and runner size I have never found. 898+ bore sizes, Max . car. Location: Melbourne fl. I have run them on a 383 too, works great if you are not looking. 400 Bore Spacing (same as the original SBC) Deep Skirt Block with Six Bolt Cross Bolted Main Bearing Caps (reminiscent of the old Ford side oilers, FE, and some early hemi blocks) Center Main Thrust Bearing. Bowtie Phase III 64cc Angle plug 184 cc intake runner. The formula to calculate the CR is: CR= (V+C)/C. Feb 4, 2024 · Published on February 4, 2024 at 2:17 pm by Mr Carter - Last Updated on February 5, 2024 at 12:00 pm. 040", they ended up at 113cc. Then 1970 Happened with the Higher flowing over counter Angle Plug 292 and 414 Casting designed for the 350 . Darren 71 Chevelle. It was used on the 73 Corvette 350/250 Hp and Camaro Z28 350/245 hp. When using 64cc heads,,,, Flat top 327 is about 9. An article in C/C mag. I would especially like the size of the combustion chamber and valves. I don't want to do any machine work just wondering what's the limit with these heads. 5" valves and they were used on the base '72 Corvette among other models. for big HP numbers. 50. I have two sets of 034 left and they work very good on 383's. Jun 27, 2023 · SBC 624 heads (or Chevy 624 heads) are lightweight models of 882s from GM. You can learn here the Small Block Chevrolet engine’s special codes called SBC head-casting numbers. their center bolt valve cover head. 625. Flat top 350 is about 10:1. The alum version of the 083s was used in the Vette only. 10110810 & 14101083. 88 valve 049 heads, It depends on the RPM range/cam specs. . Sep 3, 2004 · 3587 posts · Joined 2004. 84"/1. 88 int valve j head flows 215cfm . 50” valves. May 17, 2006 · For the sake of mass production, the production Gen III V-8 cylinder heads were designed to fit the smallest-bore Gen III V-8 engines--the 4. I Bowtie, 206/77cc ports, large port Sep 28, 2015 · Despite numerous differences the Gen III LS Engine and Gen IV LS Engine cylinder blocks share a lot of the same traits. Vortec Heads Reader Guide. Engine Size (ci) 10033867: 62cc: 2. #6 · Feb 10, 2012. 780-inch-diameter cylinder bore SUV and Apr 13, 2015 · Tech: GM 1st Gen Heads vs. 2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads. The 193 is the dreaded swirl port TBI heads. Aluminum, Buick/Chevy, 10' race head, symmetrical ports, 235cc intake ports: 33417369: 90-up: 350: 76cc: Gen. In stock trim the Corvette produced 175 hp. Dec 22, 2017 · In terms of cylinder heads, we included the 706 small-valve 5. Description Professionally rebuilt pair of Small Block Chevrolet cylinder heads. 5:1 to 10:1 range, which is doable on pump gas as long as the cam doesn't build too much Jul 15, 2014 · Chevrolet Small Block Head Casting Numbers; Casting # Combustion Chamber Size (CCs) Intake Valve Exhaust Valve Production Years Misc. 7". down at the bottom see options assembled with 1. 50" or 2. Although the heads were initially made for C5 Corvettes, they later found their use in engines like the truck-spec LQ9 and LQ4. The 292 was the 327/350 head. 638 108 lsa, Ported Victor Jr / Pro Systems Venom VX 1050. They are also very common on boat engines of that era. We had 2 of these motors, and both had these heads (250 hp in a Chevelle, and a spare 255 hp motor from an Impala). Gen III LS1 "GTZ" aluminum 38cc angle plug. 94-1. These codes have much information about the cylinder head’s features and origin. Jul 3, 2010 · Use a head gasket made for the 350 SBC not the 400. Not quite. They are the best of the smog heads. 8-10. #1 · Feb 24, 2007. May 15, 2008 · The 991 head is a so, so SMOGer with 75 cc chambers or more. The main difference between the 882 and 993 heads in regards to cracking is the 882 feeds the exhaust crossover from both center exhaust valves as opposed to the 993 which feeds the crossover from just one. 18068 posts · Joined 2005. I Bowtie, 175/65cc ports, small port head: 25534371C: 04-up: 2. These heads with their small ports make power at a lower RPM than the more common 195 to 210 cc. Thanks for your time! Like. PN 31400005 head is for the pre- 1987 302 to 400, but it has 1. Chevy V8 Crankshaft Casting Numbers. The 318 heads can be 124-125cc int port volume, the open chamber version is 68 cc while the closed is only a few cc smaller amazingly enough at 65-66cc. It takes a flat top piston to get the compression up, the ports and valves are OK, pretty much standard 4 inch bore small block fare. 02 /882 cast heads . If this is a street car, I'd also go with a street mechanical roller cam. G'day all, I am planning on building a 418 small block Chevy. These heads have double hump casting marks. rates these heads as #2 behind the old 461X fuelie heads. I was able to pull the head part #'s 3884520 (H256 RT head & H186 LT head). 6 when used on 400 engines. Apr 6, 2013 · The newer versions are capable of mid to high 10 seconds on a 355 in a 3000 lb. Jul 2, 2009 · The combo i was going to run (now for sale), was the aluminum heads, 28cc dish KB piston, Felpro race gasket (dont remember the part#) and the 383 scat crank with 5. Don't forget to follow us on Facebook, and if you run a website or write for a blog, please link to our site! Chevy V8 Casting Number Locations. 125/1. 12480011. That additional heat concentrated in the center of the head is the main reason for the cracking problem. So just about any cam you pick will do no good past the point of 4000 RPM as the heads don't flow enough to Feb 20, 2008 · firestone13914. Dec 9, 2020 · SBC Rebuild with 3973487X heads. The intake valve was 1. almost forgot if they are on a small block 400 it is logical to assume they have the extra steam holes that were not stock-- watch what head gasket you use if they are going on anything but a sb 400. I've got presumably stock 997s on my 70-72 400 small block. The 993's a large chamber, lazy burning head, the 339X takes the same idea and shrinks the intake valve from 1. newchevyman Discussion starter. 94"/1. So far I've gathered an application for the 70 LT-1. Regarding original application 441s were OEM '69 250 & 255 HP 350 heads. 1. They are valved 1. The 487 heads are quite decent for what they are. 94Intk,1. The 441X casting if memorey serves me correctly came atop the 400 cube engine, it had the largest chamber of all small block heads at 80cc`s, also if memorey serves, it came with the odd combo of 1. 50" valves. 3934 posts · Joined 2006. They have good inlet ports and are basically identical to the fuellie heads except that they have 76 CC chambers for less compression. Since you said you wanted to change valves, I suspect you have the smaller valve heads. heads, that is if the combination is right. 60. Straub Solid Roller 253/268 . Oct 12, 2017 · LS1 Engine Specs: Performance, Bore & Stroke, Cylinder Heads, Cam Specs & More. they have 64cc chambers & 1. 12506450. THIS IS FOR A PAIR OF CYLINDER HEADS. On the 461 double hump heads the "X" version had larger intake runners. 94/1. A stock 350 with these heads will be lower, a 383 with flat tops and these heads go well into the 10. casting # chamber vol. 5 & 60. 10@118mph 9-30-22. Colvin lists that one as having the 3947041 heads. The 882 heads you have are the same thing as the 993 but with hardened exhaust seats that's needed with unleaded fuel. The LS1 is the original Gen. 10 sec. Feb 24, 2007 · 160 posts · Joined 2000. 5 valves. These springs are 1. I’m looking for something moderate, decent torque but still a daily driver. My best performance was with 034. 19 1. Good Luck and :cheers: Mark :chevy Jul 9, 2003 · N. SB2. Joined: Tue Jun 11, 2013 10:32 pm. 5 or 11. #15 · Mar 5, 2011. Servedio Cylinder Head Development. May 11, 2007 · camaroboy1991 Discussion starter. 500. #11 · Apr 21, 2018. 416 casting on a stock dished piston 350 makes for a lowend monster. Jan 7, 2012 · Junk, use them to practice on but don't put them an anything. 25" springs, straight plugs, 72cc chamber. Chevrolet’s small-block Chevy was manufactured beginning in 1955, and the first-generation engines (Gen I) can still be purchased as a replacement crate-engine through Chevrolet Performance. to compliment them. 3973370 on 400sbc. 02/1. V is the swept volume of the cylinder in cc’s and C is the total combustion chamber space. More tech info. Chevy Forums FREE technical assistance for your restoration and repair. In 2005, General Motors estimated that 90 million SBC engines May 8, 2006 · Flat top or dish pistons only, no gas ported pistons. Feb 3, 2020 · 68Chevele. 5:1 compression. In addition, the SBC head is well-known for affordable In response to CaptainStompAndSteer. Chevy LS Cylinder head, 210cc Cathedral port Intake Runner, 64cc Chamber, 2. 2. Going in a 7000 pound weekend driver pickup. Part Number: SUM-162LS210CATH 5. There are lots of better practically free heads that would make much better power. I have all the parts except the cam, lifters, pistons, and intake. The motor I had like that only made power to like 4800rpms with a 214/224@050 cam but it was Jul 8, 2012 · the vortec heads will have casting numbers that end in 906 or 062. 60 valves. 96 posts · Joined 2003. Like. YOU WILL NEED TO LET US KNOW IF YOU NEED THE ROUND OR SLOTTED PUSH ROD HOLES. 299 posts · Joined 2007. 5761 posts · Joined 2019. They come fully assembled with the identical components found Apr 5, 2012 · The 642 casting 400 head is no different from the 350 casting, except the 400 has steam holes. 00/1. Re: chevy power pack heads. 3 small block engine from General Motors used in cars from 1997-2004. 240 Deck Height. 9:00am - 9:00pm EST. 654/. Those heads bump the compression up to over 9. I think in most street applications, the 049's are going to stand up to the rectangular heads pretty well. I have been trying to locate a block number on my 1967 327 motor. Swap out those pistons for a set of small domes and that should get you to 9 to 1. 55: cast iron Vortec head, Gen. They also showed up on some passenger cars with TBI. Bad points is a close proximity of water jacket to spring Sep 6, 2013 · The 1. Another option to what has been offered is to replace the dual springs w/stock-type springs that have an inner damper. Sell them to a restorer. these would have to be better than a 601 or 416 casting heads. 60" valves, 64CC combustion chambers, DO have accessory holes, intake port volume should be 161CC's, exhaust port volume should be 62CC's. 94” and 1. 94 to 1. 94 1. 0 out of 5 stars ( 1 ) Nov 3, 2006 · techinspector1. 85cr. 8L and 5. 55 valves & possibly the smaller 1. Thanks to specific designs, they generate better flow and run a greater lift cam if their springs are taken care of and upgraded frequently. 02"/1. 5 to 1 range---dont remember the exact number. May 5, 2008 · My 049's checked out at around 122cc. 3 to 1. No offroad, no racing just driving. The LQ4 and LQ9 had 6 cc larger combustion chambers. 450-. Mar 2, 2011 · 4 posts · Joined 2011. #8 · Feb 3, 2020. As for the 088 heads compared to a set of 2. When Feb 10, 2012 · Studebaker. The problem I have is I have 3 different new pairs of heads to choose from and have never run any of them before. Camaro, Corvette even Stovebolts can be found here. 60 : over the counter 23 degree, angle plug, 196cc intake runner, aluminum : 10045434: 55 cc : Over the counter 15 degree, angle plug, raised runner, aluminum : 10051101: 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. 60". An easy way to gain 20-40 horsepower on any 1955 and newer Small-Block Chevrolet V-8 (except later-style LT1/LT4 engines with reverse-flow cooling) is by installing a set of Vortec cylinder heads. Fun for quick blasts. 02 /1. No, with those pistons you will be around 8 to 1. 3L heads, the 241 (LS1), 317 (6. This put me at about 9. Watch out for these cast after 1970 since that’s when induction hardening of the seats came The intake valve sizing is 1. There are a few different 882 castings out here. 496ci CFM Ported Brodix Race-Rites 310cc, 394/275cfm, 10. Round push rod holes. In the case of the 441, heads with the "X" has the same intake runners as the regular 441 but the combustion chamber was 80cc instead of 76cc. These heads belong to the D chamber and produce decent torque power. 114 posts · Joined 2007. I suspect the motor is a small horse power 327 based on Jan 18, 2007 · Hard to tell what a "small amount of port work" means, but I can tell you that 867 heads with typical NASCAR porting from that era (late 80's-early 90's) will easily produce 715-735 HP on a 406 with cam, compression, etc. Jul 14, 2009 · 041's are a 1. Small Block Chevy head casting numbers. #2 · Oct 18, 2012. 50 Exh. Here's a set of 291's good for an 8G 327: Mar 20, 2010 · I'm doing some homework on the SBC 3991492 angle plug cast iron heads with 2. 76 cc combustion chambers. #10 · Oct 22, 2009 (Edited) The 67 and 68 302 used the 291 head as did the 327 and 350 and came with either the 2. Chevy V8 "W" Motor 348-409 Casting Numbers. The 492 angle plugs as in the given pictures were avalible over the counter only, they never came installed on a factory engine. If you want the best cheap set of heads the 96-99 GM Vortec 64cc Chmbr, 170cc Intk Rnr. Jan 3, 2003 · They are light head castings and are prone to cracking. #9. Many times the nicer HP 882 heads can be picked up cheap as people don't realize which version they have. 5:1 and those small ports and valves make it responsive in the lows. 3L, 3. 4. 12 with the head gaskets & pistons i'm using. by Carnut1 » Sat Sep 19, 2015 10:14 am. 25" diameter w/an installed height of 1. Some time ago Chevy High Performance magazine did a Mr Goodwrench 350 build up from stone stock to screaming wild in itty bitty steps see the included URLs. the casting number for the 305 heads i have is 14093627 i know that they are from a 305 87-95 and the valves are way bigger then the heads i took off my 400 but again i can't find anything about the valves rockers nothin. #4 · Aug 5, 2013. 65@125mph 406 with home ported Dart 215 heads. 7 rod. They were used on the LT-1's in the early '70s. Cylinder heads must be unaltered approved OEM and minimum 76 cc combustion chamber. Actually the 291 and 292 are identical. Jun 7, 2005 · I figure if the -416's are off a 305HO motor, they just may be about 160 cc's intake port size and around anywhere from 55 to 58/59 cc's chamber size-wise!! And should have 1. has anyone ever used either these castings? i'm wanting to put a pair on a 305. #3 · Feb 20, 2008. Mar 14, 2007 · go to the link in Tom's post, go to Cylinder Heads/Dart/Iron Eagle, look at the 180 or 200cc. #7 · May 12, 2007. #2 · Nov 3, 2006. 6 or 1. The specs I give come from stock/as cast heads from 64-71. Vortec 062's 406 w/hyd. 50" valve 64cc head from the 1969 295hp 350 and the 1970 300hp 350,, same engine as none of the actual specs changed. 440-inchdiameter valvesprings. 437 better valve spring option. Central Kansas. Feb 27, 2003 · it is common to use up to . They're not race heads and being thin wall Feb 16, 2011 · The 291 or 292 Turbo Flow will get a SBC 302 or 327 to 8G's = Late 67-Preliminary 69 Castings. Feb 2, 2015. The heads are better than low power crate engine heads. L-29 461 BBC 11. The basic short block is an 817 block converted to splayed mains with a Callies Dec 23, 2005 · The 193 flows 175-180 cfm intake and 140-145 cfm exh. Apr 17, 2015 · 418 SBC head choice. Also, with all the other applications such as the Z28, the Corvette LT1, and the Yenko Deuce there was a mix of 3927186 and 3947041 heads used. 600 Lift Ea. LS6 was also used in some Camaros and Pontiac GTOs. 60 exhaust valves instead of the classic 1. The head #330545 is identical to the 993 head but has 2. don't know alot about heads or cams. We just bought the truck and don't have much history on it so I’m not sure the engine needed rebuilding but its all apart now and we’re looking forward to the project. Think about it, your motor isn`t much different from a 406 sbc besides the rod length and the extra weight. 480 lift cams with 882 heads, use the Z-28 type valve springs, watch for retainer to guide clearance, most will clear if you use an umbrella or o-ring type seal, do not use the tin shields or valve rotators on the springs. The 193 was called a fast burn head by GM back in the mid 1980s, because the swirl induced demanded less ignition timing due to the faster burn front convection. These value-priced cast-iron cylinder heads use modified combustion chambers and high-velocity port technology to provide improved performance. #4 · Jan 29, 2005. 6 valves. A 255cc runner that flows 260cfm for a 406 sbc would be a pretty big head and would`t run out of air at 5700rpm. The 243 heads are cast out of aluminum alloy Oct 15, 2007 · 2802 posts · Joined 2002. Not a bad deal these are the iron equivalent of the L98 head, they were used a lot on non Z-28 or 'Vette, 350, TPI engines of the late 1980's. 72 (go figure). Nov 2, 2006 · The chambers should be 75 cc's and the valves could be 1. When they first issued, they didn't flow any better on the intake side Dec 27, 2016 · 3998997 chevy small block heads, cam. Apr 13, 2010 · Al Covin 's book CHEVY BY THE NUMBERS notes/verifies this oddity of the 881 & 882 Castings being excactly the same late in the 1974 year . The idea was to flow and measure each Oct 1, 2006 · If your worried about it do some port work to your heads and you`ll be fine. Good points are screw in studs, guide plates, good ports. Good performance head. Jul 3, 2007 · The 3998993 has 1. #1 · Jul 9, 2003. 12480034. Hi All! My son and I are rebuilding the 350 out of his 1987 R10. Oct 21, 2009 · Z15CAM. Just sold an extra set of the good 2. Jun 3, 2022 · The 243 heads came on the powerful LS6 engines from 2001 to 2006. AFR's 195cc SBC Enforcer Cylinder head feature our Permanent Mold “As-Cast” Technology surfaces on the intake runners, exhaust runners and combustion chambers that allows for extremely accurate and repeatable port location/performance. Ignore the holes in the heads from this point on- they will be plugged by the 350 gasket. 02: 1. These heads work great for low RPM power and torque, but due to the restrictive swirl vane they run out of breath at 4000 RPM. After flat milling them . Feb 4, 2007 · 10110810 sbc casting heads. Below is a test of a very mild application with the factory Mar 23, 2002 · Feb 28, 2008. GM approved head numbers are - 14079267, 3986336, 3986339, 3986339X, 3986388, 3932441, 376445, 3928454, 3932454, 3876487, 3973487, 3973487X, 3973493, 3951598, 468642, 330862, 333882, 3998920, 3998991, 3998993 Jun 29, 2007 · 17686 posts · Joined 2007. Looking for a small cam that match these heads. 72 / 1. 92 for the base engine the 2. Before I spent a nickel on these heads, I would call around to several machine shops and have them give you estimates on all the work it will take to bring them up to specs. Feb 22, 2018 · bigdeuce32. Mechanically similar, GM’s LS and LS-based Vortec engines wound up on almost every branch of 0. Heads fit 1987 - 1995 only, TPI and TBI intakes. May 9, 2008 · The 350 came stock anywhere from 7. intake valve exhaust valve; 032 PN 31400003 head is used on 1986- on Corvette with center valve cover bolts. 6 Exhaust Valve, 3. 02 for the LT-1 engine. The easiest way to check if yours is the crack prone dual heat riser head is to If you're going to get a shaft system anyway, I'd get a set of AFR 227 heads #1068's. the compression will be 9. 10. 02 Intake Valve 1. I have looked in every nook and crack readily available. This not only includes the chamber volume in the head but also the gasket volume and any volume contained in the block when the piston is at TDC as well as any piston dish volume. O. Be aware that the 867 has 60/40 valve spacing, so your valve reliefs will have to be adjusted. #11 · Sep 5, 2004. Model specific subject matter experts, classified ads and more. They had 2. Heads have the center bolt through valve cover. Sell the 487X to someone doing a resto and buy the Vortecs around $500 a set new. Oct 18, 2012 · DoubleVision. #3 · Oct 15, 2007. 186's are very reliable and have decent flow with flat top pistons in a 350. kv qm ih qx go oc an yq wn hw