Bbc 802 heads. Constantly updated news summary Watch the latest news summary live from BBC News 24. 5K views 2 replies 3 participants last post by supersport6667 Dec 16, 2007 B What the best BBC oval port heads, as far as port size and flow? Please help trying to make a decision on heads. Steve Jackson seemed to Buying big-block cylinder heads can get costly. Why would someone do this? Is there any advantages/disadvantage to it. 190 intake, 1. Mr Jaber has denied a BBC News report that he planned to use the COP presidency as an opportunity to strike oil and gas deals with 15 nations. Looking at 353049's and 336781's. Watch as we compare popular oval-port big-block Chevy cylinder heads on the flow bench and the dyno. With the BBC, what's considered average that most head porters can expect to see out them with larger valves and full port work? I found 2 threads here that the individuals who were using the iron rectangle heads, were seeing 360 cfm @ . 5 comp, I used a 802 casting GM oval port closed chamber head, 2. Why are these heads desireable? I am not a GM head expert. The original head design is often referred to as having a 26-degree valve angle I've been asking for possible recommendations for cast# for big block closed chambers heads for 454 . Like what you read? Get the full book to learn more! Big Block Chevy Engine Parts casting numbers and Identification Big Block Chevy Cylinder Heads Open vs. Click here for more details or check out the June issue of Super Chevy Magazine I am running a 215 and an 802 head on one of my engines, same situation as yours. They provide excellent mid-range torque and power, and are good for heavy vehicles. Is there any trueth to this. Recently I had my 454 rebuilt for my 68 Chevelle SS. 802 casting heads. If it were me, I would just use what you have!:thumbsup: I don't remember where, but I was reading where someone used 427 components in a 454 block. I was told they are very desireable GM heads. Jan 18, 2018 · The heads are designed to deliver power through 7,000 rpm in engines with less than 500 cubic inches. They are 113 cc open chamber heads. I have a 454 with flat top pistons. I Chevrolet Big Block Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2. 19 diam. 802 vs 215 BBC heads Jump to Latest 3. What the best BBC oval port heads, as far as port size and flow? Please help trying to make a decision on heads. I looked the number up and they came up as 1966-1967 396/427 heads. Complete Cylinder Heads Guide for Big-Block Chevy Engines - Pt 1 The big-block Chevy’s canted valve heads are largely responsible for the tremendous power capability of the Rat motor and its continued popularity. can anyone give me those numbers? I think 1 of them ends in 290. any idea how much compression could be gained over 781 heads? The Chevrolet Performance service replacement cylinder heads are direct replacements on most 1990-and-later GM Big-Block 454-cubic-inch and 502-cubic-inch engines. I picked up a flat top motor 498 and figured I'd need close to get the compression where I need it. They were repaired with ceramic and I am nervous about using them. The 702's aren't 'peanut port' heads, they're just an older closed chamber. 74 exhaust. In fact all the big ovals have the same runner size so I dont get why the 049 and 781 are the holy grail of bbc iron heads. The best of the BBC, with the latest news and sport headlines, weather, TV & radio highlights and much more from across the whole of BBC Online. Apr 11, 2015 · Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. All the national and international news, updated 24 hours a day. These BB-Chevy heads come in an As-Cast series or Full CNC-Ported series. He says (no secret) that one of the main reason his motors make the HP/TQ (see sig) is due to these heads. 88 valves, and bowel work has been done. 19 intake, 1. J's shop and have Bryce check it out for me, but its easier I have a flat top 498 engine that I had planned on using closed chambered heads that should have had close to 10 to 1 compression. Complete with valves and springs, dated B-21-67 correct for 396/427 chevelle camaro corvette ect. Any questions just ask. I always figured them to be too expensive but I've stuck alot of money in heads over the years. Anyway, the chamber size should be around 113cc compared to the 118-120cc's of the 049 and 781. 88 exhaust Just wondering what are a good set of plugs to run in my 468 for street driving. I have an old set of closed 802 heads with bigger valves and some port work but thought their might be something better out there. If its ported and run a decent cam and intake. Feb 5, 2023 · We used the 820 heads with the stock size valves, (which are oval port with kind-of a half open chamber, also having a large relief in the quench around the exhaust valve), in many 402 size engines with great success however, the 454 size engines preferred the 049's with a 2. To make sure you spend your cash wisely, here are a few budget-friendly options to guide you. Closed Chamber - A good way to describe big-block heads is to categorize them as open or closed chamber. The oval port heads were used for the standard output engines in cars, trucks, and boats. He loves these heads and does about 30 hours of flow work on them. 50 exhaust while the bottom head is the performance version (325hp and higher) used on 67-68 327 applications with 2. and think the other is 048? Thanks in advance. BBC STORIES: The latest breaking news headlines, articles, podcasts and videos, including coverage of world News, UK News, elections, BBC Verify, BBC In-Depth and more. 94 intake and 1. 030 780 carb with dished pistons and mild cam ? please I did a 396 a few months back, it was . The machinist told me this combination is only going to produce 8 to 1 compression ratio and the engine won't make much power. If I were The top head is the 'lower horsepower' version (300hp and under) used on 67-68 327 applications with 1. I have been told that 781 heads are the best flowing gm stock bbc head there is. Thanks Tee For sale BBC 802 heads $250 + shipping Jump to Latest 948 views 6 replies 3 participants last post by kmart401 Apr 5, 2011 G For sale BBC 802 heads $250 + shipping Jump to Latest 948 views 6 replies 3 participants last post by kmart401 Apr 5, 2011 G Just curious, what was the best cast iron factory GM BBC cylinder head and what is the most that you seen or heard of them flow in fully ported form? I assume a rectangle port of some offering. Thanks Tee Big-block Chevy head identification can be difficult. 050 on a 108. Learn about the different types and configurations of Chevrolet Big Block Heads, from closed chamber to open chamber, from large oval port to rectangular port. Chevrolet Big Block Heads Combustion chamber types All early Chevy Big-Blocks used closed chambered heads. Im trying to make 450-500crank hp with factory take off heads and obviously aftermarket cam and intake. 1 comp, but they need so much work, im looking for something in better shape (budget build) i found a set of 802's, but there almost closed chamber, but not quite-what cc could they be, 110 or maybe less? 390 802 215 HEADS 1967 whats the most correct PLEASE REPLY Jump to Latest 2. If so great if not I need some help choosing some heads for a bbc. 75 headers, 10:1 pistons, and the performer rpm. Open-chamber designs are larger and provide lower compression ratios, so require a much larger piston dome to achieve the same compression as a closed-chamber head. The rest Id keep about the same with the 1. They also produced heads in cast iron or in aluminum to achieve different power output and performance. The head are going on a 396 stroked to a 434 and wondering will it make 550+hp don't really have a cam in mind but looking towards a solid roller can I get some help. what is the smallest currently available combustion chamber sizes in a Big block chevy design. 780 exhaust, ported. They "Look" to be a little bigger than that. Wondering if there is a closed chamber design available in both stock and or aftermarket aluminum heads. Please HelpTrying to make a decision on heads. There 802 heads, dome pistons and around 10. Open-chamber designs are larger and provide lower ProMaxx heads have started a revolution in the performance world. Chevy Forums FREE technical assistance for your restoration and repair. If you simply dont want to do that, check the free classifieds here, lots of guys have the closed chamber heads for sale quite often. i built my 496 s/b based on the cc's of my 781 heads, for 9. We’re impartial and independent, and every day we create distinctive, world-class programmes and co BBC News BBC News is an operational business division [3] of the British Broadcasting Corporation (BBC) responsible for the gathering and broadcasting of news and current affairs in the UK and around the world. Visit BBC News for up-to-the-minute news, breaking news, video, audio and feature stories. Is this The 820 heads have the same runner size as the 049 and 781 heads. Nov 28, 2010 · I have the 781's on my 496 built by Mark Jones. Complete with valves and springs, dated B-21-67 correct for 396/427 chevelle camaro corvette ect Visit BBC for trusted reporting on the latest world and US news, sports, business, climate, innovation, culture and much more. The engine builder cut into the water jackets on the exhaust valve seats on several cylinders. I know there are a lot of BBC heads. 040 over, 10. Has anyone checked the chamber volume of a stock 802 BBC head?? I could probably lug one over to Dr. The BBC is the world’s leading public service broadcaster. The rectangular ports heads were used for high-output performance engines. Find out the casting numbers and specifications of the heads for various applications and performance levels. The online destination for impartial and accurate news and sport, with a suite of features sites including BBC Travel, BBC Culture, BBC Future, BBC Worklife and our video destination, BBC Reel. May 2, 2010 · anyone have any flow numbers for 802 bbc heads? You never want to guess at flow numbers because even the same casting heads can flow different. I've read that the 088 rectangle port could go 390 cfm on the intake. The cam was a solid flat tappet 264 @ . Breaking news, live updates and in-depth analysis from BBC News journalists around the world. I took them to a machine shop for a valve job. May 2, 2010 · anyone have any flow numbers for 802 bbc heads? You never want to guess at flow numbers because even the same casting heads can flow different. 8comp. Its going in my Look under the hood with CarTech Books’ complete cylinder heads guide for big-block Chevrolet engines. 800". pair #802 BBC heads, stored 30 years in my heated shop. I am no engine guru so I figured I would ask. Closed-chamber cylinder heads have small combustion chamber volumes for high compression ratios, with even mildly domed pistons. We manufacture and sell more aftermarket aluminum cylinder heads than anyone else in the business. Ive got a 89 454 tbi short block its in great shape ive been doing some reading and seen that the 802 series factory head is best. Big Block Chevrolet Compatible Heads From innovative design to precision manufacturing… BRODIX is serious about quality and workmanship at every step of the process. Is 360 cfm moderate mainstream for the rectangle port BBC or on the lower end of the totem pole? May 2, 2010 · anyone have any flow numbers for 802 bbc heads? You never want to guess at flow numbers because even the same casting heads can flow different. Complete with valves and springs, dated B-21-67 correct for 396/427 chevelle camaro corvette ect Hi guys, I have a pair of 1967 BBC 802 heads. MorTec lists the chamber as 101cc. Get all the latest news, live updates and content about the World from across the BBC. Dart Big Block Chevy PRO1, PRO2, Big Chief, and Race Series cylinder heads are meticulously engineered to elevate your engine's performance. 02 intake and 1. 19 1. 7K views 2 replies 3 participants last post by xCamaroSSx Nov 3, 2005 6 I have a set of 113cc heads #353049. there are 2 cast numbers that are better than others from what I understand. intake valve. BBC News provides trusted World and UK news as well as local and regional perspectives. 496 Thanks To accommodate all these applications the heads were designed with different combustion chambers, valve sizes, and port dimensions. No matter how large or small your racing operation is, we are glad to be a part The 60203 with the 770 holley carb and your 802 heads would make for a nice strong, and streetable package. I am wondering are a set of stock casting 390 heads worth having when fully ported, 2. The ID number on the heads are 3909802 date coded D67. Dates are D 6 7 and B 8 7. Would you know what you're looking at if you found a pair at the swap meet? Now you can. If your guy want $200 just to flow them then find a new shop. They have custom designed a head to meet the demands of the Big Block Chevy world, while keeping the quality high and the price reasonable. 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