454 peanut port heads. The later generation engines were different.

454 peanut port heads Details Peanut port heads with some heavy intake porting done on them stock size valves asking 150 obo Feb 20, 2004 · A peanut port will turn more than 4K. It worked, but it was nothin' special. I know everyone is probably going to say trash the heads, but I would like to keep them. 19 intakes in. Not so anymore. 4L marine engines. 80 baro, 2140 elevation. Shop Now at the Guaranteed Lowest Price! Jan 27, 2006 · Instead of spending lots of money on rectangle heads, we were able to use the peanut ports successfully. Results were Since peanut port heads are great for low end torque I plan on keeping them when I modify my 454. 68 @ 122 on the rev limiter. The engine will be going back in a 95' Suburban that I mainly use to pull the boat around with. The heads have been milled . I had one set dyno'd on a 454 and got right at 400 HP at the flywheel using a 228/238 hyd cam, Performer intake, and Q-jet. Best time 11. Jun 25, 2010 · If it's a first generation BBC (70's-80's) it probably has oval port heads-rectangular port heads were early 396/427/454 HP units. 500's In super good shape just going with something else Mar 14, 2017 · Gen. 88 exhaust valves? These are going in a true street application, and even if i play with it, its not going to see more than 5200-5500 max and valve lift only in the low . Mar 13, 2019 · Here is my Peanut Port combo, . 77 *** Open chamber Oval port *************** Used from 1985 to 1989 in what would have to be trucks, are they large oval port heads or true peanut port heads ? Dec 29, 2012 · I'm gonna have to take a page from F-Bird'88's playbook and recommend a low compression 454 with cheapo peanut port heads and a small blower. I bought a pair. Feb 25, 2010 · PEANUT PORT HEADS WITH RECTANGLE PORT GASKET ABOVE 346236 1975-87 454 Open 113cc . Sep 22, 2008 · I'm building an engine from a gen V 454 truck motor for my 67. Gm did use peanut port heads on 454's and 502 truck engines and still sell them today. LETS TALK TORQUE! FULL RESULTS-GEN 5 454 UPGRADE-STOCK PEANUT PORT HEADS. A perfect cylinder port significantly increases the horsepower and torque of any vehicle. The oval port heads were used for the standard output engines in cars, trucks, and boats. I decided to try them after Vortecpro's car ran so well with the little port heads. he's putting it in a 71 camaro with a th 350 trans and @2500 -3000 stall and 3. A Quick Overview- Peanut Port Vs Oval Port This article will let you know all the possible facts Find many great new & used options and get the best deals for GM 14092360 BBC Cylinder Heads 454 Mark IV 70-90 Peanut Port Chevrolet Marine at the best online prices at eBay! Free shipping for many products! Nov 17, 2020 · Vortecpro 467 CU IN, 9. 88 exhaust valves lot more porting. (can be made to work) Jun 6, 2003 · The 454 big block formerly in my Z (and for the past 18 months on an engine stand!) came with small oval port heads; it’s from a 1978 Suburban. , 4-tube long headers and a E-brock Peanut Port Performer 2-O intake and a stock Q-Jet and you are good to go, imho. Customer was happy, the Mercruiser Jul 12, 2018 · The key to building a low-rpm, high-torque motor like you are envisioning is to use a large cubic inch motor such as a 454 and a set of heads with diminutive intake ports like the peanut port heads. e. There is definitely a learning curve to it, but hop Nov 26, 2021 · Peanut port heads are a great head if you work within their limitations, or even work to reduce their limitations. 4 gen iv head casting numbers please - 14092360's are mid 80's open chamber Truck Peanut Port heads These would have been used on the low hp 454's. 72 valves Edelbrock Air Gap, 850 A/D Mighty Demon, Comp Cams 282S . With the popularity of larger engines, stroker combinations and more efficient cylinder head and cam designs came the need for intake manifolds to support these combinations. Jul 27, 2022 · Latemodel trucks feature an even smaller oval intake port, frequently referred to as the “peanut” port, on heads that appear to be nearly round at the port entrance. 70's@112mph, in 2019 Casting 360's 2. The block will only be cleaned on the deck to straighten it. 88 exhaust May 5, 2008 · hi does any one know what is the true chamber volume for peanut port 236 heads ? Mortec says 120cc chambers thanks Apr 30, 2000 · When did oval port heads go to the peanut port shape?I have a 454 with 781 heads-date code late 1976-never seen the ports thou-will it have big oval or peanut ports?When did hard seats come from the factory?1972?I have casting #6272292 heads with a L 3 71 date code (late 1971)would they possibly have "hard seats". I believed what I found researching the casting Oct 26, 2008 · Peanut ports are fine for a very low-rpm build that you don't want to make much HP. It is mainly a tow rig. You can get a peanut port engine to make power, but with oval ports like 049 and 780s selling for next to nothing, why spend more to make less power from peanuts? Jul 15, 2019 · I didn't go to the extent of bolting a rect port intake onto peanut port heads, but I have bolted them onto some oval ports, and in just seat of the pants feel the big intake seemed to add something over an oval port intake. I would pull the heads and install better valve springs b/c the stock ones are very weak and low lift!! Sep 15, 2025 · Intake for BBC 454 360 Peanut Port 450hp+ by Tartilla » Mon Sep 15, 2025 1:53 am Marine 454 Gen VI with 360 PP heads 2. When the CSA is too small, closing the intake valve later can make more power. it's a low mile 454 out of a 87 dually with peanut port heads. So do I have to get a special chip made to "eliminate" the EGR from the Aug 29, 2021 · As for an intake, either the Wieand Street Warrior or the Edelbrock Performer 2-0 (which is also a peanut port intake) would work for what you are looking for. Dec 20, 2019 · 14092360******* 454 *** 85-89 *** 2. the runner in a peanut port is about 220 cc while a large oval is about 240-250-ish. 72 valves. Hi, I'm new to socal jet boats and fairly new to jet boating. I have a big block chevy casting # 10114182 and head casting # 10114156. want to keep the heads (budget) after reading all the story's on how allot of people say the peanut heads suck i want to hear some from people ho have them on there 454,and how many power they can make. i just put a proformer on my 454. 73 gears ) SM465 + NP205 33" tires total weight around 5000 lbs it is used mainly in sand dunes and on the street this is the combo I am thinking in and I need Chevy casting numbers for blocks and heads for big block V8 engines. A number of prime elements concerning heads need to be dealt with. I've ported dozens of sets of the 236's for marine applications. "peanut" port) heads "Mark IV, Gen V and Gen VI small oval port cast iron heads, commonly called "truck", "round" or "peanut" ports and made from 1976 on, make power and high torque at very low RPM's and are helpful when the motor is pulling heavy loads in trucks, trailers or RV's. Sep 4, 2012 · That Chevy further downgraded the oval port heads to peanut-port status is a clear indication that maximum performance was never high on the list of design criteria. something to think about. Aug 21, 2024 · What year did the small "peanut" intake port heads first come out ? They are way smaller intake ports than the old oval port heads. Mar 27, 2023 · I put Vortec heads on my boat 454 (peanut-ported Mk IV) and ran it that way for a few years. and to put things in perspective,and Olds big block head is about 170-180 cc's. " There's a lot of conflicting info on whether these are good heads for boats. Apr 8, 2008 · I already have a Ram Jet 502 intake setup, and a tuned port ecu/wiring (727) that I can get working on there for almost no cost. 236/360 heads flow about 20 CFM less than a 390 head both being stock. Casting 236's 2. 2ths bigger in diam. Just a light porting and valve job, maybe deck them to knock the chamber volume down. 030 454, flat top 2377 speed pro pistons 7. Aug 17, 2021 · Peanut port heads, a staple of the early to mid 1990’s big block Chevrolets, were never considered a performance cylinder head. 12” intake and a 1. eddy only lists the one #2161 oval port proformer for pre tbi motors, the other is an egr version. 5200-5300 peak HP 5500 peak rpm (always propped to never exceed) I'll mildly port the int/exh. The factory iron heads were given the once-over, including a fresh valve job, surface and new springs and Good shape marine or truck heads, peanut port big block gen 4 stuff 70-92 . 060 over 454 with the 292 heads,Q Mar 30, 2025 · 346236 1975-87 454 Open 113cc . Makes more sense to me than juggling naturally-aspirated components. Has anybody here checked the Chevelle site or heard anything about member there named Vortecpro? I am in tear down phase of an 82 14015445 stamped block with the 236 peanut heads. Even with porting, on a 454, they are falling off at 5200. Watch sleazebay, there's a guy there selling Gen 5/6 rectangle port heads for about $500/pair. up to about 5000-5500. The later generation engines were different. I tried to figure out what heads it had, and from the casting number, it appears they are the peanut port heads, which surprised me because the engine has a lot of other good upgrades on it like roller rockers, Gil Exhaust, etc. Early engines used either the large oval port or the rectangular ports heads. PEANUT PORT BBC HEADS-DO THEY MAKE POWER? CAN YOU UPGRADE THE GEN-V 454 TRUCK MOTOR? HOW MUCH POWER DOES A STOCK 454 MAKE? WHAT IS A GOOD CAM UPGRADE FOR A TRUCK APPLICATION? Jan 2, 2010 · The cost-conscious 454 from Demon was sporting a set of reconditioned peanut-port heads. (peanut port heads have been made to work for some applications) Before you consider swapping heads, check the block casting number as the Gen 5 blocks are not good for putting MK IV or aftermarket heads on. Nov 28, 2015 · Port Shape and Volume This section quantifies a few major aspects of big-block heads, so you have better command of cylinder head decision making and can determine the best modifications to make. 06/1. PEANUT SLIGHTLY LARGER, COMMON EARLY OVAL PORT HEADS WITH RECTANGLE PORT GASKET BELOW polishing and smoothing these combustion chambers,surfaces, removing the sharp ridges etc, has shown noticeable benefits in Oct 26, 2008 · Re: building a budget 454 with peanut heads A CC 268HE or 270 Magnum cam, a cheap set of 1. Install with a shim head gasket for max effect. Most of the intakes on the market were developed 20+ years ago when typical engines were 396-454 cubic inches. Sep 29, 2005 · They are called, "peanut port" heads b/c their intake ports usually are about 200 cc's all the way up to 230 or so, vs 235 to 260+ cc's for true large oval port heads! Nov 5, 2021 · If it's looks you're after, you'll be fine, but performance will suck. 4L's. 10 gear Car pulls 6K with no problem, has run the best of 11. Aug 11, 2015 · Vortecpro 454 Peanut Port Engine Build And Drag Test 1 reading Jump to Latest 182K views 367 replies 85 participants last post by 427L88 Aug 11, 2016 Nov 20, 2014 · We take a junkyard 454 shortblock, and without taking it apart, build a new top end and other parts to make a 700 HP big-block for less than 2500 dollars. Grab some 049 heads for $300, a used Performer for oval ports for $80, and the gaskets for $40. Jan 6, 2012 · Hi, I recently bought a stock motor home 454/ th400 combo for my 1970 c-10. 780 VS QFT Brawler carb Factor Rollers with Hyd Roller cam @ 224° area. Dec 11, 2022 · I've got a Gen V 454 that currently has the peanut port heads, but it's going to get rectangle port heads in the future. Complete off running 200 hr engine. Question is will the port mismatch really hurt if I stay with the peanut ports? Or should I go Oct 1, 2010 · The choice of peanut-port cylinder heads from a mid-to-late-'80s TBI big-block may concern a few enthusiasts, but the power numbers certainly demonstrated their potential. 310-330hp 454 / 7. 3 Compression, 228 @ . Sep 1, 2012 · Standard bore 454, Holley 770SA, Stealth RECT port intake (cant get any more mis-matched than that), 14092360 PP heads, Voodoo 60201, domed (12cc?) pistons giving somewhere are 9. I would like to increase the compression ratio a bit, but keep it drinking Nov 22, 2010 · According to the book, Chevrolet Big Block V-8 Interchange Manual, by Tom Currao The #346236 peanut port head shows 225cc intake port volume, and 113cc combustion chamber volume . Feb 15, 2012 · 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 lift etc. I know that putting a rectangle port intake on peanut port heads will ruin airflow but I was wondering if it'll work as a temporary solution. Can someone help guide me in the right direction? Mar 1, 2008 · Check out this 496 Chevy Big Block Engine get tested with Edelbrock Performer RPM Cylinder Heads and Dart Cylinder Heads other cylinder heads are TFS, Brodix, GM and Pushrod, Featured in Car Craft Aug 13, 2004 · How much horsepower can you get out of the peanut port heads? I have a used 454 that the previous owner said he thought was 400-450 horsepower. Tight LSA's and the right amount of exhaust duration make more torque in street cars. So, I have been reading up on the swap Apr 4, 2022 · Peanut Port Heads Engine & Drivetrain I currently am running my genV 454 with the peanut port heads and it has good torque and runs well. Aug 14, 2014 · Look under the hood with CarTech Books’ complete cylinder heads guide for big-block Chevrolet engines. THESE LINKS AND THE SUB-LINKS THEY CONTAIN HAVE HUNDREDS OF TIMES MORE ADDED Sep 3, 2022 · So I'm using a 74 454 in my 66 ss and it has the small intake ports along with flat tops. I have a set of 67 396 heads. I've looked extensively on the web for an answer of the chamber size of these peanut port Aug 5, 2020 · I am rebuilding a gen v 454. The machine shop now tells me today that these heads are the dreaded peanut port heads. However, these heads differ from the "old school" variety oval port heads from the 60's and 70's in that they employ a sizable "ski jump" intrusion in the intake port to enhance swirl, and they have a Dec 12, 2008 · The 236 and 360 heads have the Peanut Port (PP), smallest of the bunch. Oct 15, 2022 · What is the core difference between the peanut and the oval port? Though both types of cylinder head ports are efficient, you will get more CFM with the conventional oval port compared to the peanut port. I do not know what the BRAND NEW WEIAND STREET WARRIOR INTAKE MANIFOLD, SILVER, 396-454CI WITH PEANUT PORT HEADS, COMPATIBLE WITH BIG BLOCK CHEVROLET V8 ENGINES MOST OF THE INTAKES ON THE MARKET WERE DEVELOPED 20 PLUS YEARS AGO WHEN TYPICAL ENGINES WERE 396-454 CUBIC INCHES, BUT NOT ANYMORE. A mild 454 dyno'd at slightly over 400 HP (not huge, but decent for a 9-1 motor) with a set. Your second question, no I could not tell from your picture. They can be bolted onto other engines, including the 396, and used in boats or other vehicles. Are these peanut port or oval port? I don't want to take the intake off to find out since this is such a low mileage good working motor. They'll run out of breath by 4400 rpms and seriously limit performance. Some people swap on the newer Gen 6 Vortec 7400 L heads to kick up compression and more power. Would it be worth grinding out the intake ports and tapering them for a smooth transition to the common aftermarket oval port intakes available? I'm thinking about . Apr 8, 2013 · Large oval port intakes will fit over peanut port heads, but a peanut port intake or large oval port intake will not fit a rectangular port head. I'm modifying it with speed pro domed pistons, comp cams 280h magnum cam, performer intake, and headers. 750" to 1" of transition tapering on the heads Get the Best Performance with Weiand Street Warrior Aluminum Intake Manifold Big Block Chevy 396-454 with Peanut Port Heads 8122P parts at JEGS. My experience with the stock peanut port 454 is the cam and heads give up too soon - around 3500 RPM. 2 comp peanut port 454 on the dyno today with a 228 @. In a 86 Chevy shortbed. Jun 10, 2012 · i'm trying to help a friend pick out a cam for his 454 he just got. So yes they look like 326K. when car craft has a 454 build up called {Cheap big block engine build $2,650 big block chevy} car craft october 2010 and only with 9,3:1 compression small cam 446 hp and 548 ft lbs torque. The heads look good (although greasy and oily) and have a rebuilder tag. The Large Oval Port, the rectangular port, or the Small Oval Port aka Peanut Port. Jan 5, 2011 · I have my peanut port heads that i am installing 2. 35. 10. 06 intake valves, 1. Late-model trucks with big blocks feature an even smaller oval-intake port, frequently referred to as the “peanut” port. Aug 2, 2023 · Peanut port heads are on my 1998 3500, with a 454. 72 exhaust, mild ported Best time, 11. 8 compression, 236 Peanut Port mild ported heads with 2. They're currently at 200cc intake. I plan on using an original quadrajet iron intake which has taller oval ports. Same answer to your first question. Switching to some 049 oval port heads will up the torque ang hp for a minimal investment. Are they the 454 peanut port heads and the manifold is for the large oval ports? Jun 21, 2005 · Registered Member Joined Jun 21, 2005 Posts 13 Reaction score 0 Location safwa Dec 4, 2007 #1 I have a 454 from a 87 Suburban with regular peanut port heads that I will build for my K10 my rig is a 1986 K15 that has 14BFF + 10-Bolt ( 3. Aug 27, 2005 · 446 hp from a peanut port headed 454 is not breaking news. They are going to replace a set of peanut port heads on a 454. V & VI Blocks 454, 118cc chamber 2. 16@119mph this past May Both sets of heads were run on the same flat top piston . Some people swap on the old 1966 1969 396-427 oval port heads with small 98-100cc chambers to get more compression ratio. They feature small oval ports that just don’t flow a lot of air. 561 @231° duration on a 110 LCA 1 3/4 headers with Walker Dyno Max Bullets Jeg's 10" 3800 Converter 4. 030 454 engine, with small tube headers and a Mar 15, 2008 · -James '73 Caprice Classic 454, "Peanut Port" Heads, std bore 14092360:thumbsup: TH350 '68 Impala Custom 327, TH400 85% restored Residing in Sacramento, CA originally from Orlando, FL Peanut port heads are a nickname given to the oval-shaped port heads found on the fifth-gen Chevrolet 454 truck motors. I have heard it will work if I use the rectangle port gaskets but I'm wondering if I will have other issues RELATED INFO A couple days of reading the Mar 30, 2015 · I had a 9. The Vortec heads are a straight bolt-on, nothing special needed provided you select the correct gaskets, the pushrod guideplates are the right size for the pushrods, and the valvesprings and such match the cam. oo8 I'm thinking about running a 22cc dome piston in this engine. 1 comp. i never tried to pick a cam for a motor with so little MAYBE THAT'S NOT THE RIGHT QUESTION, BUT CHECK OUT THIS VIDEO ON THE DIFFERENT BBC 454 (468) COMBOS I USED TO MAKE OVER 300 HP, OVER 400 HP AND THEN OVER 500 HP USING THE LOWLY PEANUT PORT HEADS. How much will they hurt the performance This week I try my hand at porting and polishing the peanut port heads for my big block 454 budget build. Nov 4, 2003 · What cc dome pistons did you use? I'm building a peanut port head 454 for my Suburban. Finally, until I can Mar 3, 2017 · Regarding peanut 236 casting heads. PEANUT SLIGHTLY LARGER, COMMON EARLY OVAL PORT HEADS WITH RECTANGLE PORT GASKET BELOW polishing and smoothing these combustion chambers,surfaces, removing the sharp ridges etc, has shown noticeable benefits in both reduction in a tendency to detonate, and a bit better power and since its not all Oct 3, 2016 · The peanut port heads are all about torque. 150 or best Murfreesboro Feb 9, 2009 · I am building a 454 for my Chevelle and I'm on a budget. Nov 27, 2021 · Welcome, here are 2 different set of peanut port heads I have used in the past few year. Can's say I am disappointed at all with my 2 sets I have run, with little to no compression. 2-9. Like what you read? Get the full book to learn more! Dec 30, 2021 · Peanut port vs vortec vs oval by Berserk » Thu Dec 30, 2021 2:17 pm How do the peanut port heads flow compared to l29 voretec heads? I would like to raise the compression on an old 454 big block, but I have heard the vortecs don't flow any better than the peanuts. CAN YOU REALLY MAKE DECENT POWER WITH A SET OF PEANUT PORT BBC HEADS? CHECK OUT THIS VIDEO WHERE I UPGRADED A 1992, GEN V Mar 4, 2008 · You can build a street engine with peanut heads, but you're giving up a lot. Just wanted to know of anyone that could give me some insight. I don't want interference issues with the piston/head clearance. What is the best cam for my 9 to 1 compression,. The vortec heads have no heat ports to the intake runners to operate the EGR. Lots of BBC info on the net, including casting number ID for the heads you have. and they sure turn higher than 4000 rpm's. Thanks. Street Warrior Aluminum Intake Manifold Big Block Chevy 396-454 with Peanut Port Heads Dual Pattern Carb Flange Natural Finish See more product details Free Shipping - Ships on Monday QTY Mar 6, 2017 · Hard to tell from the pictures. I'm sure it won't be too much of a problem, but i'm just curious to know if they make an intake for PP heads Feb 13, 2009 · most 454 engines came with a rather low compression ratio and oval port heads, ,theres a wide variation in the engine potential in stock form, a 454 with peanut port heads and 8:1 compression , and a cast crank with 3/8" rods is at a disadvantage compared to the performance bbc engine versions, with 11:1 compression ratio big block that came Two sets of BBC 454 peanut port heads,we're on running engines when removed, been setting a couple years, 75 dollars a set ,part #s in pictures, no trades, local pickup only, will not respond to is Apr 18, 2017 · General Q & A - 454 7. 06 Intake Valve Those are "peanut" port heads, not for performance. Feb 16, 2017 · 14081052 heads Can the heads below be mated to the Gen V 454 engine? Details for 14081052 Casting Number14081052Added to Site2010-12-25 18:03:33 (2248 days ago)Manufacturer Chevrolet Category Cylinder Heads Type Big Block V8 Date1985-1987Notesoval port, open chamber, 366 tall deck, 427 tall deck, 454 Truck, Marked "HiPerf" Jun 23, 2006 · 236's ARE peanut port heads and do not even look close to an 049 or 781 head which appear almost identical. 050 hyd, 236 peanut port heads, Performer RPM intake, 850 AED, 4 quart GM pan, LS6 stamped rocker arms, LAT oil. Port openings on the tunnel ram are twice the size of the peanut port heads. 050 flattappet hyd, with a performer RPM intake, was just over 500 HP @ 5600 RPM. I was given a pair of peanut port heads for free that have been rebuilt. Make sure the head port (oval or rectangular) match your intake. Chevrolet Big Block Cylinder Head Casting Numbers RECTANGULAR PORT - Valve size 2. this is my plan Jan 29, 2017 · grumpy? I bought a really nice rectangle port intake at a local swap meet, for a damn good price, but my 454 has the crappy peanut port heads. 19 intake valves, 1. My 2nd question is will the rectangle port RJ502 manifold do alright on the peanut port heads? I know this is an obvious mismatch, but it's the only induction option I currently have other than a quadrajet which is not going to happen. 1-. Rat motor heads feature a unique combination of siamesed intake ports mated with symmetrical combustion chambers and equally spaced exhaust ports. can I still get 450+ HP with these heads? what kind of mild porting can I do besides a port gasket match? what kind of cam should I run? Recognized as small oval-port heads, peanut-port heads were made from 1976 on to enhance power and torque at very low engine speeds, such as those used in truck applications. My question is there any benefit in upgrading to 1. Popular recommendation has been to replace the stock peanut port heads with '96 and newer 454 vortec heads. It is designed to avoid revving over 4,000 RPM and is about half the size of a traditional port. 2 compression, peanut head engine that doesn't "sound" like much. 3:1 CR. Sep 23, 2019 · I agree with the recommendation above for the 781 heads over the peanut port heads on a Mark IV. Nov 16, 2014 · Hi everybody! So yesterday, I scored a set of L29 heads from Pick N Pull for a total of $45. Street cars typically have more CSA than needed, and performance below peak torque is important. As this is mostly a PERFORMANCE-oriented group, plus the heads made for the Chevelles back in the day were either oval or rect port from the factory, the PP heads are looked-at as boat anchors by most here. According to info I have found the heads are "peanut port heads. I would like to get about 500 hp. 5 timing. Its all going to depend on what head they used. Feb 3, 2022 · After that the Gen V 454's used Vortec heads. Link to post is below Jan 20, 2010 · I'm looking at an Edelbrock RPM AG intake but because i have peanut port heads, the oval ports of the intake are most likely going to be too large. i bought felpro gaskets for a 1977 and the intake matched the heads in the amount of port to All Chevy Big Block Heads came in 3 different intake port configurations. Or find an oval port lower end for the tunnel ram, the tops are swappable. 42 gears. Peanut port heads can be ported to increase their RPM range, but the 781's would work great with the stock size valves for towing without modifications. Sep 11, 2006 · peanut port heads are slightly smaller and more round inlet. Dec 27, 2014 · I have a gen v 454. Designed with Computational Fluid Dynamics software, the Street Warrior intake rises to the Oct 26, 2013 · I had a quick question, peanut port heads or oval on the intake side right? I would pull mine apart but really don't feel like tearing into the engine. 68 Chevelle, 3720 pounds, 3253 DA, 27. your particular Oct 13, 2020 · (3) The CSA of the peanut port heads is too small for 467 inches at that rpm. 19 intake, 1. 07/1. On mild performance builds using peanut port heads, whether 467 or 496, I see most using a 2. Jun 2, 2014 · If I recall correctly, the L29 heads (casting # 12560241) do use the larger oval intake port as opposed to the small round "peanut port" truck head that was common on the prior generation 7. It's a matter of picking the right intake, like a good dual plane. oval ports are not much, maybe . Those old low RPM big blocks just keep on running. In an effort to decide whether aftermarket aluminum heads are the best approach for my purposes, of if the stock heads can be modified with reasonable success, I “ported” one of the heads with an electric grinder and a Dremel. I needed to see the intake ports to know they were peanut port heads. prob @ 8. Sep 22, 2006 · hi i can get a 454 block with peanut heads on them motor needs rebuild. 06 and 1. In an effort to get more… 12-13-08 06:31 AM - Post# 1583932 In response to Impala65SS What intake do you use with the peanut port heads? Do you have to worry about the intake port being larger then the port of the head? Feb 20, 2019 · Factory big-block Chevy heads were offered in both aluminum and cast iron, both open- and closed-chamber designs, and oval (passenger car) or rectangular (high performance) intake ports. . Vortecpro has a very long post about his build to strip test of a 467ci, mild cam, low 9. 80” exhaust. Jul 18, 2012 · Two issues back, we subjected a 468-inch big-block Chevy to a variety of different oval-port cylinder heads, ranging from stock peanut-port-style heads to full CNC-ported versions (see “The Big Dec 4, 2020 · I did up a set of 366 truck heads with stock 454 valves, pocket ported on a fresh 454 with a mild cam on propane in a 1 ton 4x4, boy was that a disappointment, no discernible difference from the high mileage peanut port engine it replaced. 75" dia. 80@111 Hope this helps, My Mar 19, 2007 · I picked up a 454 this weekend and they have the casting # of: 14081045. Small Oval Port (i. cshshm lyai vulvx qkrnuz hjpq uytwbq nmnh klem koju rml uxavcnx juswl bnjxhye vfyr yxeaxq