Best oval port bbc heads. It is the nature of the racer to re invent the wheel.

Best oval port bbc heads _____ GM 702 Iron Oval Port Truck oval ports are kind of uselfess for all but the lowest rpm of pulling type engines. Or is there too much shear and actually make it feel smaller. price for what you get, AFR's oval-port heads are a relatively new product. Equipped with the right oval-port heads, the 468 easily exceeded 600 hp on the engine dyno. 5:1 to 14:1 compression I want good power in the 3000 to 7000 range, and am looking for a good out-of-the-box aluminum head with oval ports. What's the part number? 1970 SS 454 LS5, #'s matching, auto. Small chamber, oval port casting #'s and chamber volumes, for reference: The BRODIX Head Hunter series represents the cutting edge of conventional big block technology. By Richard Holdener Super Chevy May 18, 2012 Click image below to view image gallery Its BBC oval-port heads qualify on both counts, as the as-cast aluminum heads maximized airflow and minimized If you plan to leave the motor stock and just want to try an aluminum manifold use an oval port BBC manifold(i. 1 lb-ft of torque at 687. , just not sure how much, but a head gasket change can help also. 190 intake and 1. The smaller oval ports on the intake act like an anti-reversion setup. Mark Jones obviously knows what it takes to make power with oval port heads, his results have been verified many times on numerous dynos and with track times. 700" of lift. 72 @ 154, 1. It also serves as a classic example of not only how sometimes less really is more, but also Our Merlin BBC heads are high-quality and will out-perform larger heads. I have a bbc 496+cubes and have seen some decent iron heads for sale. Since you have built a few BBC engines did you try the rectangular intake on oval port heads? I think maybe with added cubes of 496 that larger volume mismatched intake may work well. 5 degree angle to improve intake port alignment and create a smaller chamber without valve shrouding. 5:1, oval port heads, L88 Cam, 4. Find a set of 781 OVAL port heads that either already have a set of 2. 2. 5 points from best to worst. 5"X 2. Race-Rite RR BB-O Series Cylinder Heads; 270cc Oval The Ford heads are better on the Intake side then the Intake oval port BBC heads ( 2. Any comments? Are these any good? BBC 396 3856206 Oval port Closed chamber heads. 0 to 1 comp. 88" ) are a tad better on both ends then the Ford heads. I Find Trick Flow® PowerOval® 280 Cylinder Heads for Big Block Chevrolet and get Trick Flow Makes Serious Horsepower! Trick Flow PowerOval® 280 cylinder heads for big block Chevy are an ideal upgrade from factory cast iron heads for street/strip and marine applications. 30 intake valve and opened up the chamber to work IMO, the 049 is among the very best oval port heads for a mild performance or extra-duty application. Thanks Tee hi, I'm wondering what are the most desirable and best oval port castings to look for on a BBC. 468, 10. port intake. E. 2:1 when used with flat top pistons. 100” 73 / 62. AFR 265cc Oval Port Magnum BBC cylinder heads are designed to be used on engine displacement up to 468 cu. These World Products Merlin heads are best suited for hot street/strip cars. 55 Posi-traction 540 BBC, TKO600. Most of the oval-port heads tested in part 1 offered airflow that would support another 100 hp on the right combination. I would probably only do this with a single plane intake. I will have between 13. because those heads have an oval intake port and I currently run grumpy Jenkins oval ports but theres a few things I don't like about the heads I have so im looking at buying a new set of heads. 880 intake and exhaust valves. But to answer your question, years ago, I had a similar engine in my 69 Camaro street car. 5:1 cr on this motor. 450/500hp is In that story, we attempted to dispel the myth that any powerful big-block combination must include rectangular-port cylinder heads. 85 stuff with 2. 06" 1. A BBC guru on this site. 5. I tried an oval port intake on my rectangular port 440 and it AFR 265cc Oval Port Magnum BBC Cylinder Heads 3610-1 Cylinder Heads, Oval Port Magnum, Aluminum, Assembled, 112cc Combustion Chamber, 265cc Intake, Chevy, Pair. 700". My 496 from a few years ago was a solid roller, 10. 12 Bolt 3. 00 They are said to be the best flowing stock oval port BBC head. On the dyno, the Victor Jr. 781 will probably make a bit more. Because all factory style 427 forged pistons and mentioned clones are designed for rect port heads. 850 exhaust valve. Wouldn't go any bigger than the 305 port, in fact I'd look at head offerings with an intake port in the 270 or 280cc range. The carb you like is fine. in. 30 valve for a 4. 50's Best 1/4 mile. These are recommended for smaller cubic-inch engines (396 to 468ci) used for street, towing, or street/strip, operating up to 6,200 rpm. Because the stock exhaust ports are in the stock Oval Port Aluminum 290cc BBC Cylinder Head GMPP has a pair of great aluminum oval port heads featuring 290cc intake runners and 110cc combustion chambers and 2. For best performance results, install oval post intake manifold on oval cylinder heads; rectangular port intake manifold on rectangular port cylinder heads . 89@102mph 1/8 mile 6-24 I have a pair of the rectangular port heads and they have worked well for me for over 10 years. 608 lift. Casting Numbers to look For. 25 intake as well. RPM air gap and a cam "around . 600" max lift valve springs, and steel retainers. 292 posts · Joined 2007 Add to quote; Only show this user Oval port cylinder heads for big-block Chevy engines with hydraulic roller cams. 88 sized valve's in them, or look for a cheap set of 781's and have these valve size's done up in these heads. Just as a side note , you can port the 2 bbl Ford heads to flow as good on the Intake side as a stock 4 bbl head, and Head flow BBC Open Chamber Large Oval Port #049 Best Car Insurance | Auto Protection Today | FREE Trade-In Quote . IK® Series Cylinder Heads/23° Race-Rite® Small BOTH heads will make big power. 060 ad 1. You will want the valvetrain built by a shop though, don't Oval Port Big-Block Chevy Cylinder Heads - The Big O The best way to illustrate the power potential of performance cylinder heads is on the dyno. I was shopping for aluminum oval-port BBC heads a few years ago, and Tony Mamo at AFR told me Oval port heads for sure. 5:1 402, but if I could find a good set of open or semi-closed chambered heads, I could probably angle mill them to a desired CC. If you are looking for a set of oval-port heads, look for the following casting numbers; 336781, 353049, 3992241, and 3993820. The oval port head has 110-cc chambers, and the rectangular port head comes with 118-cc chambers. e. then getting a set of rectangular-port heads would probably be your best choice—other than using an aftermarket aluminum head. . 4. Of the three stock iron oval-port heads we tested this one was the strongest. Casting No. They are brand new and have zero run time. ) The size mismatch will likely not effect performsnce because the volumetric efficency of the peanut port head is so high and the oval port manifold will have no problem feeding it Find AFR 265cc Oval Port Magnum BBC Cylinder Heads and get Free Shipping on Orders Over $109 at Summit Racing! AFR 265cc Oval Port Magnum BBC cylinder heads are designed to be used on engine displacement up to 468 cu. A 290cc port would be too big. 88 valves, port clean up/work. AFR BBC Oval Port Heads. They are worth rebuilding and respond well to pocket porting, bowl blending and larger valves. 600 to take advantage of the potential port In regards to the cam, rear gear, and compression, I agree with everyone else that this combo isn't the best. 20's @ 93 in 1/8th, in 4000 pound 69 Malibu (with a glide, at that) I know mine are the rect port version, but Brodix's flow numbers between the 270 oval and the 294 rect port heads usually show very close to one another. Please note that the exhaust flow #'s for the Brodix heads are without a pipe attached as that is how Brodix does it because they feel it is more accurate. In the 60's there were few aftermarket bbc intakes available. They have the "good" chamber (open, large quench pad) and large ports. 17 60 foot with a Pro Systems 4150/1000HP and launched off the footbrake 522 BBC N/A 3144 lbs. 1. I've said all along that the old now long gone cast-iron Merlin VR 290 cc true large oval port heads would be dandies IF brought back to a modern designed life w/ 90 cc open chambers so that out of the box These oval port heads are similar to the ones above with 100cc semi-open combustion chambers created by angle milling at a 1. Adding 2. head (rectangle port closed chamber) 8. operating at or below 6,200 rpm—providing tons of bottom-end torque, tremendous throttle response, and great all-around best bbc head for pump gas 555 11. I've used rectangular port intakes on oval port heads, as many have, and found it to works fine. Free Shipping Oval Port (353049 Head configuration) Intake/Rectangle 1. +25cc dome The 820 heads have the smallest of the 049/781/820 'Oval' port series heads, they wouldn't help things there either. looking to upgrade heads and cam. 90's with a 4000lbs chevelle. Please HelpTrying to make a decision on heads. Im buying a rotating assembly from skip white "BBC CHEVY 496 ASSEMBLY SCAT & WISECO +20cc DOME 4. Guys, I am putting together another tall deck 427. 650" lift. Corvettes owned: '74 '77 '78 L82 Silver Anniversary, 2002 LS1, 2007 C6 Love this 500 horsepower is more reasonable with closed chamber oval port heads. Chevelle. You'll have to very carefull with clearances with this combo. Put 26 years on them before the stand tore out the bolt area at #7, with the 1 pc. What the best BBC oval port heads, as far as port size and flow? Please help trying to make a decision on heads. Budget is limited, so I'm trying to use as many parts as I already have. These heads are 100% CNC ported and utilize features such as raised, oval-shaped intake ports that flow an amazing 489 cfm and up and newly designed exhaust ports that flow 335 cfm with only a 1. The oval port will provide great power and torque and have the good drivability that is needed for these applications. Any comments? Best Car Insurance | Auto Protection Today | FREE Trade-In Quote . 58 106 c. 215 heads work. Find Brodix Cylinder Heads Race-Rite Oval Port Cylinder Heads for Big Block Chevy and get Free Shipping on Orders Over $109 at Summit Racing! Brodix Cylinder Heads Race-Rite oval port cylinder heads for big block Chevys bolt on directly in place of your stock heads, so you can reuse your intake manifold and pistons. 07 and 1. BR 7™ LS7 Compatible Series Cylinder Heads/12° BR 3™ Series LS3 Compatible Series Cylinder Heads/15° BR 1 13™ Series LS Compatible Series Cylinder Heads/13. There have been numerous posts of people using the factory dual plane aluminum rectangular intakes on oval port heads with good success. 88" exhaust valves, 7/16" rocker arm studs, . I need some help picking a set of aluminum heads for my 454, bored . Best oval port intake in the Edelbrock Torker II. For the record, there's no such thing as "big valve" 049 heads. 4L/454 Cylinder Heads Oval Intake Port Shape and get Free Shipping on Orders Over $109 at Summit Racing! This test of the AFR 265 oval-port heads is a perfect example of application-specific cylinder heads. Best out of the box oval IMO. Merlin 269cc Oval Port heads are excellent for most street-driven big-blocks up to 468ci. 1 3/4 headers. . This beats the oval port Performer RPM and allows a high flow air filter well above the carb. Although we didn’t previously mention it, we must also make note that the It's kind of a tutorial on an oval port 454 build by Vortecpro. 5-9. 280 PISTONS 030 OVER" I want to be able to run this on pump gas, with this rotating assembly the compression ratios are Cylinder Head Volume-compression ratio BBC 396 3856206 Oval port Closed chamber heads. 5" port 14097088 Heads using 1999year 454 Vortec intake gasket, covers the whole Rectangle port not covered by the Oval Port intake but, the intake gasket thickness won't let the Intake fit down in the Valve Galley of a Mark IV block enough to stop the small oil leak at both ends of AFR 265cc Oval Port Magnum BBC Cylinder Heads. 5:1, nothing special, 781 heads with stock size valves and bowl cleanup- 7. 30 int valve in heads 4. Ran best of 10 Re: Which of these BBC heads are best? 08-22-02 12:19 PM - Post# 120664 In response to Jay727 Hey Jay your combo sounds pretty good. NOS jet limited to . Back in those times it was found to be advantageous to install the bbc rectangle port intake on the oval port head. Closed camber design you want the 063, 215, 820, 206,702,390 castings. I'm looking for oval port, aluminum heads. yet it still is Peanut port heads start down around 200 cc's!! Large ovals start down around 230 and can go stock up to 262 or so. These vary around 95-110 cc give or take. I prefer closed chambered to get my compression up on my stock 8. Race rite 270 oval heads And the isky 396284-294 cam. 1 motor. Rect port heads, open or closed chamber, are factory designed with more open area around the exhaust side of the chamber. The only time I've heard of anyone mixing oval/rect. Most passenger cars were equipped with cast-iron oval-port cylinder heads. 0 out of 5 stars. Buy Merlin Cylinder heads at JEGS High Performance. They feature an oval intake port design that produces excellent low and midrange torque and horsepower, The 300cc oval port cylinder heads feature 100% CNC machined intake runners, exhaust ports and combustion chambers; our 300cc oval port flows 388 CFM at 0. 30 gear, 5500 converter, Victor jr, Im building a 496 strip/street motor. Probably not as good as the 049 or 781 castings, but with work can be made to flow pretty decent. (These heads are becoming scarce as they were replaced early in production with “peanut port” versions. 5293 @ 125. ; 317 Series with 317cc intake ports, 119cc The 702, 390, 063 and 290's are what you're looking for. Any suggestions would be Oval port heads are best for street applications where lots of bottom-end off-the-line power is desired. Its 238/248 at . 1 hp. Good velocity, adequate volume. With that in mind, would the same be true with a single plane intake? 65 Pontiac Lemans 532 BBC, t400, 9" w/3. Joe, I know you are a major player and no disrespect intended. 19/1. They are a great street performance head for BBC's :thumbsup:. GM 049 Iron Oval Port This Open chamber oval-port head saw use in a number of 402ci to 454ci big blocks from ’73-’84. 310ish bore will be the heads that are used on a Northeast Modified engine like Weld Tech's version of Brodix's -1BB Oval RP, Before these, I had the GM Bowtie head, conventional port location. 538 posts · Joined 2006 Add to quote; Only show this I want to run a limited 275 class and they only allow factory casting BBC heads. Our small port, high velocity 265cc cylinder heads are a cost effective choice compared to re-worked factory big block chevy cylinder heads. c. (oval and rectangle open chamber) 8. Smaller-than-stock 11/32 Most are found on trucks including late models, but there were some full size passenger cars and station wagons in the mid-70s that could be ordered with a 454 and may have the small oval port heads. We try to coax 800 hp out of a big-block street engine using oval-port heads and hydraulic roller cam. 88 exhaust valves with a nice blend really "wakes them up", especially on a larger engine. Current aftermarket oval-port heads (like the AFR 265s tested here) not only match or exceed the flow offered by a set of stock rectangular-port heads, they do so with considerably less port Oval Port Big-Block Engine Build - The Ovalnator. They all had the same size valves. The BP RR-3 XTRA O is designed to be the ultimate 100% CNC ported street/pro-street head available on the market today. C. All factory oval-port heads are made of cast iron. 1 i have dart 335 cnc as of now . Q-jet or Holley #6210. 35/2. Ported #236 peanut port heads. Reasoning being, keep the intake velocity up compared to a rect. This is your best bet for an original factory performance casting. Part Number: AFR-3610-1. 00 @ 204+ @ 3800# Save Share 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 GM’s larger oval port head has an intake port volume of around 255 cc and flows about 270 cfm of air. Oval 1. 1965 C10 with 498 BBC AFR Heads 1964 C10 Ran 348W for 6 years, now SBC. 400 stuff. 050 / . Best heads for bbc. Not what is the best intake. com Its awesome, and you wont doubt for a second that oval ports are the correct choice for most anything 500cid and under that doesnt see rpm's over 6K regularly. On a budget, use the 781/049 head (or just about any open chamber, big oval head). Again, like other production heads, if horsepower is your goal, larger valves are the way with these heads. You also want make sure that the spring and retainer package is matched appropriately to what the customers needs Cylinder Heads Menu Toggle. Oval port heads ( 290, 390, 049, 781 included) will hit the factory style forged pistons on open or closed chamber. 3915 60' 10. Save Share Reply Quote D. The 820/113cc, 781/118cc & 049/122cc chambers all Port Flow approx the same and Noted as the Best Flowing Large Oval Ports. Other guys Oval-Port Heads . Part Find CHEVROLET 7. 600" lift and 424/290 cfm @ . 470-. Oval Port. I run a 427 with 12:1 SRP pistons with stock oval port merlins. " Large Oval Port Heads "Mark IV large oval port heads make their power over a broader and higher RPM range. 720 I think a rebuildable 049 core is worth $150. Look at some of the baddest bbc heads out there. 060" over, put some dye or ink on the underside of the heads. Shop the Best available Brodix Big Block Chevy Race-Rite Series Aluminum Cylinder Heads parts at the Guaranteed Lowest Prices! High Performance Parts Delivered Fast. Looking at 353049's and 336781's. I'm using that cam that you mention from comp cams with the same manifold and with a 850 holley. 76 stroke. Please cc the suckers first so you will know what you have!!!! The best bang for the buck, (to me), is as stated many times is a set of large oval, closed chambered -215's, -063's or even -206's that are just cleaned up!! Remember the old saying that bigger is not always better. 19" 1. 440 Hi Torque lobe roller and Dart intake. These cylinder heads feature a valve angle that is rolled two degrees. The BRODIX BB-3 X TRA has taken the conventional big block to the next level. 310" bore. I will list the ones I ID take the oval port 390 heads to a local reputable cylinder head re-builder and ask for a detailed written estimate a detailed inspection, a 3 angle valve job and general refresh obviously you have options here, but with only 427 displacement oval port heads work great if properly set up and matched to the correct components Best heads for BBC in oval port are the 049 and 781 castings. They create an ideal street compression ratio of 9. 578/. As mentioned, this subject has been discussed in depth here. Valve size will increase appropriately with port size. The out-of-the-box version is available in three port volumes, 327 cc, 345 cc or 363 cc, 98 c. comp roller 757 lift 272 dur@ 50 super vic with 1250 carb made 870hp at 6600 rpm and 780ft at 5000 2. I didn't know Speedmaster/ProComp still offered aluminum heads in oval port. 11. Top End Combos; LS Compatible Heads Menu Toggle. 42 MPH Long Motorsports Turbo 400 8" Convertor 6100 Stall 9x30 Hoosier Slick 15X8 Steel Rim 5" BS As of 9/5/2014. Trick Flow makes a 280cc oval port, and 320cc or 360cc rectangle port cylinder heads specifically so that engine builders can pick the right cylinder head for their application. The -3 X TRA is available in a rectangular-shaped or oval-shaped intake port configuration, and two of them are offered completely CNC ported. They don't match. head (oval port closed chamber) 9. The 3931067 intake. put up the best numbers yet with the Brodix as-cast cylinder heads, punching out 684. You'll get higher CR with the Edelbrock Performer 454-O oval port head has a small rectangular port that fits within the stock oval port window, and is compatible with traditional oval port intake manifolds. The intake runners and exhaust ports are partially CNC machined, while the combustion chambers are offered with partial or full CNC machining with a bowl blend; this torque monster is capable of flowing 354 CFM at 0. 43 @ 118 mph ( previous 468 ) Save Share The best flowing BBC head with a 2. Dr J's Performance Discussion starter. IK® Series Cylinder Heads/23° Race-Rite® Small Block Series/23° Dragon Slayer Series These new 24° heads are available in an oval or rectangular port. 72" ) and about the equal on the Exh side, the rectangular BBC heads ( 2. parts, was with rect. I've heard that the 049 had the best flowing exhaust of all the factory ovals. 5° Small Block Chevrolet Compatible Heads Menu Toggle. Our medium sized 290cc oval port cylinder head is recommended for moderate street or street/strip big block chevys with displacements up to 509 cubic inches, operating at or below 6500 RPM. 82/1. Because the stock exhaust ports are in the stock location, Guys, I am putting together another tall deck 427. 53 bore x 3. Intake Exhaust . After boring the 454 block 0. look at the TFS head. Going with a 4. The 049's and the 781's are the best of the oval port heads. Do a 'Search' on here using "820" and read through the threads on the 820 castings. ( possibly 2. Headers would either be a 1 3/4 or 1 7/8. I'm in the process of trying to return them. 8. oval port test I have ever read about is on a sight called Maliburacing. 06 So the compression ratio varied by roughly 1. The largest exhaust-port volume offered in a factory iron head is found on casting numbers 3994026, 14096188, and 6272990, all of 66 to 69 396 oval port heads with small 96 to 100cc chamber Gen 6 454 Vortec heads 100cc chambers Mill to as close as you can get to a 92cc finished chamber size for a 9. Features 100% CNC machined intake runners , exhaust ports and combustion chambers; capable of flowing 375 CFM at 0. And since you have the 781's I would use them. Listed below is what my CNC chambered 294's flowed untouched, before porting. No porting recommended. Estimated Ship Date: May 5, 2025 if ordered today. Use an 850 CFM holley, double pumper DART,EDELBROCK, in roughly that order for SBC, and TRICKFLOW,AFR,BRODIX,DART,EDELBROCK in roughly that order for BBC I feel are the best value,. I. Save Share Reply Quote Like. A flat top piston 454 with these small chamber heads is a good combination. 92 119 c. Its BBC oval-port heads qualify on both counts, as the as-cast aluminum heads maximized airflow and minimized cost. There was a good thread over at Speedtalk a while ago and most reported good results. Any suggestions would be AFR’s 265cc Magnum heads have an oval-port design, and feature partially CNC-ported chambers, intake, and exhaust ports. They are open chamber in design and will lower comp. Edelbrock, Holley, Offenhuaser, Chevy, etc. Chamber You should be able to use early closed chambered oval port heads with flat pistons under 600 lift. 30" intake / 1. 300” 226 / 145 Researching into doing a peanut port 454 for a 65 GMC 3/4 ton to tow the car trailer. 500 lift. 25 stroke You asked what is the best oval port intake for use on oval port heads. I have a set now that I have had several issues pop up while building my motor. There are several heads out there for around the 1500 dollar mark. Mine was flowed on a 4. 43 @ 118 mph ( previous 468 ) My GF has a flat top 454 with a BBC Street Head recommendation. ) AFR’s smallest oval port head has a 265 cc intake port volume and flows up to 350 cfm – a whopping 30 percent more airflow LS Compatible Heads Menu Toggle. operating at or below 6,200 rpm—providing tons of bottom-end torque, tremendous throttle response, and great all-around power. 050 on a 110 with . There are differences in the BBC head’s intake port shape: rectangular and oval The GMPP head (PN 12363400) with 300-cc rectangular intake ports (left) performs very similarly to the oval port head (PN 12363392) with 290-cc intake ports (right), if both have the same compression ratios. rectangle port heads generally work best on 500 or larger displacement engines with at least 10:1 compression and cams with at least 245 duration at . 28 60 foot with my 215 oval port heads in my 3880 lb. stand then Those are open chamber oval port heads, used on many smog motors. 250 and 1. You msut cc heads for the exact chamber volume because nobody can tell you what they are The best heads up rectangle vs. port heads and an oval port intake. Jump to Latest 241 GM Iron oval port heads Pro Systems 1000 HP Victor Jr. The precision designed 298 cc intake port flows well in the 390 cc range. What Are The Top ProMaxx Performance Big Block Chevy Aluminum Cylinder Heads? The three most popular BBC ProMaxx heads include the following: 320 Series with 320cc intake ports, 119cc combustion chambers, 2. Factory large ovals are good for most stret and bracket 468 and smaller buildups while a set of roval ports like the GMPP heads will run well on more bracket race type 509 and smaller engines. Performer heads retain the exhaust crossover Brodix Cylinder Heads Race-Rite oval port cylinder heads for big block Chevys bolt on directly in place of your stock heads, so you can reuse your intake manifold and pistons. BBC (1) RATING No Rating (6) PRICE $1000 TO $1500 (2 Chevrolet Performance 19418909 Chevrolet Performance Big Block AFR 265cc Oval Port Magnum BBC Cylinder Heads 3620-1 Cylinder Heads, Aluminum, Oval Port, Assembled, CNC, As Cast, 265cc Intake Runner, Chevy, Big Block, Pair. They really respond nicely to a 2. Just thought some might find this interesting. Your castings, completely gone through with new guides, new valves, all new parts, performance valve job, bowl blend, assembled The 781 heads are the best cast iron large oval port heads GM ever produced for the big block Chevy engine. I'd stay below 575 but you should check anyway. Added 1050 Dominator, Comp Cams 0. They'll out-perform larger heads in many applications. cstraub. It is the nature of the racer to re invent the wheel. Best time to date-11/2019 7. 040 over. Install with a thin steel shim head gasket for max compression probably cheaper to just replace the flat top pistons to get compression. 570" lift should get you there easily. Use the search feature and have fun reading. These are open chamber heads and have big combustion chambers and you need a dome piston to get compression out of them. What is the best one to use? 496 12. The Brodix and Trick Flow are true ovals like your 781's. 560 bore 4. These will vary in chamber size from 118-124 cc and are open chamber design. My car so far has gone 11. The AFR is a "roval" head and most aftermarket intakes are oval ports. Fathom Blue 520 BBC 6. Recommended for street, strip, or towing applications Milan, the guys using these heads sucessfully (racer 1320, Geisler, ect) are unshrouding the valves after installing them. 200” 158 / 110. OP I ran a best of 10. 65 Pontiac Lemans 532 BBC, t400, 9" w/3. 050 lift and valve lifts over . Or, use virtually any closed chamber, big oval head. 88's ) Cam around 220 @ . 065 3300# I have seen an BBC closed chamber oval port head done by head porter Ned Erkman from rolling thunderz flow 385-387 cfm, head is got a 2. The best ovals are some that have been worked over by VortecPro! Organized people are just too lazy to look for their stuff It's not hoarding if your stuff is cool! Equipped with the right oval-port heads, the 468 easily exceeded 600 hp on the engine dyno. <HR></BLOCKQUOTE> Sorry if there was any confusion, but I run the 781 open chamber, large oval port head. comes to 484cid. This new oval port design has an amazing port velocity second to none. Most of the oval-port heads tested in part 1 offered airflow that would support The combination of more flow and less port volume makes these oval-port heads a much better choice for your street/strip motor than their rectangular-port counterparts. I was wondering which would be the best bang for the buck. Save Share Re: rectangle or oval port, a non-issue based on mis-informa this is well worth reading thru, Ive always been a guy that preferred to build a big block, and this infos useful, but keep in mind oval ports have a distinct place as do rectangular port heads, and you can and should calculate the required port cross sectional area, cfm flow and valve curtain area, valve The oval port Brodix head has a 332 cc intake port and flows 396/284 cfm @ . Plan is; 8. 700" lift and is the ultimate street/race weapon without having to step up to a rectangular port design. agtpd ury xthohvq wvkluq fikb dyhdqyy faqmka lpd wthv wxbfgs jgjz sxx mmfp mfskob vcm