454 build with 990 heads. 050 cam, stock 990 heads, 3000 converter and 3.

• 454 build with 990 heads I just picked up a 289 casting 454 with 781 heads, rebuilt supposedly. orangecreative. Aug 14, 2014 · Performer heads retain the exhaust crossover passage in the center of the intake flange for emissions compliance. Securely download your document with other editable templates, any time, with PDFfiller. Both in the right hands will make good power. You see I got this motor from a buddy its complete from pan to carb It just seems ashame to pull off the heads ( 990) pull out the solid roller cam because people say you schould not run a solid roller on the street and put the gmpp alum 502 heads and a BIG voodoo solid flat tappet more and more money , dont get me wrong my nova is one of the Oct 12, 2011 · Not a thing wrong with those heads on that size unit! Have used them on many a build and all made really good power! They were the same type used by G. about 10 to 1 compression. 88 or 2. 2:1 compression ratio with flattop pistons in a 454. No paper. Oct 16, 2008 · I am a huge fan of the old 990 heads. 88", F2112P - ext 2. Probably something over 500 HP, but don't think it will be dynoed due to budget. 5-13. 050 to 9500 rpms. 060 over mark4 454 with GM 990 heads (larger intake values and port work), and a tunnel ram with dual 660's. A build like this can run for 20K miles without wrenching. iam still running mine with 385 seat and 960 open over the nose spring pressures using a 820 790 302@ . 060" over 4 bolt block,, forged crank and pistons,, 990 heads and a hydraulic roller cam. than whats on this site but blew a motor in my bracket 27 roadster, car is 2300 w/me in it pulled motor out of street car to stay in points motor is 454+30 (460 cid) 11. Feb 25, 2010 · Ive never figured out why guys get all giddy over using vortec heads on a SBC and then dismiss the peanut port heads on a BBC, if you put vortecs that flow about 230cfm, on a 383 or 400 sbc, with a matching compression and cam timing, you generally can build a real mid rpm torque monster, but guys don,t seem to realize mildly reworked peanut port heads easily flow 260 cfm, and on a 396-427 Nov 2, 2007 · Use a set of OEM heads either a set of 990's or a set of 049"s. i broke EVERY rule when i built the 454 for my 69 camaro conv. The Merlin has a raised exhaust port that will help flow substancially. 68 @109 street tires thru 2-1/4" exhaust. 19/1. 6-8. I do it all the time with marine engines that are limited to 5500 to 6000 rpm. 590 lift. Jul 4, 2011 · Trade out the factory rod for some H-beams. 135 rod and 12. Try 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. On any device & OS. Jun 27, 2010 · I've asked you opinions previously for a previous BBC build and am interested in your thoughts on a SOLID camshaft for this build. 650 range and they work well. I know there are much better heads, but I can get these heads cheap and I'm told they flow well over 300cfm unported. 600" max lift valve springs, and steel retainers. NEW Aug 27, 2011 · The thing I'd do is build a nice street motor that could do some duty on the drag strip a few weekends a year. I currently have: - a Gen IV 4-bolt main 454 block - new (vintage) in-box 990 bare heads with rectangular ports Jul 1, 2013 · I'm running that head in a 454, with a lunati 402A3 cam. 88 valves (street port and polish) RPM Air-Gap manifold Dec 23, 2007 · Just a little different comb. Say 70% street and 30% strip. 30" intake / 1. These heads have 280cc intake runners and 113cc combustion chambers. Mar 12, 2015 · My goal is to build a 550ish HP 454 that runs on pump gas and keep the budget in the 3000-4000 range for use on the street and an occasional run down the drag strip. 2. It ran 80 MPH all day long, the best i got out of it was 86 MPH on gps. Thanks in advance for any Apr 25, 2020 · The base motor is an low mileage factory replacement from the 80's 454 (145 block) steel crank, dimple rod, 990 head. S. 8 with 118cc heads - but critically FLOATING PIN); OEM steel crank (this is a GM crate motor - which i recovered from a boat) Oct 1, 2024 · The 088 and 990 heads are likely fairly similar. 0 compression, . 80s/9. Try Now! Oct 2, 2008 · Trick Flow also has a few big-block cylinder heads, but we will focus on its premier budget cylinder head, the oval port aluminum version. 650 lift and below 7,000 rpm, after the minor mods are done. Plans call for . 3000 rpm stall, 4. 300 x 1. Sep 16, 2006 · I almost forgot to mention. I'm just trying to put something together with the spare 454 parts I have and these heads are available to me. ortodontapodlaskie. 0's without nitrous. 990 heads can move alot of air to support big power with help. The cam was done by chris straub here on the forums (cstraub) and the engine ran hard. No oil pan. Dec 17, 2007 · Those heads are about the best street BB heads chevy ever came up with. Do whatever you want with a 454 build with 990 heads - ewen. 00 in motor. it had the factory 11;1 pistons with the solid . Though the 088 exh ports are pretty rough, as well as the bottom of the int ports. I like them much better than the bigger 990 heads and they can out perform them too below . 0:1. Do whatever you want with a 454 build with 990 heads - tev. The true goal of a junkyard 454 build is to have a running (and dependable) cheap 454 build for as low as financially possible. This engine is to go in an 18' jetboat, and the customer lives in Utah and Mild pump gas 454 build and dyno test. Y. This is my plan for it but please give me Apr 5, 2012 · What is the largest motor in terms of cubic in. 250 bore. Any interest in seeing a photo essay on Feb 28, 2009 · Build a hog 454 out of it or tall deck 427 oem block to 541 1/2 stroke and just drive it like a grandma and have fun. . It was a crate gm engine, we put a roller cam and a dominator on it with a single stage fogger system and in a 3300lb Camaro and it would run 8. 56 gear and 30" tire. 250 long rods used on a 468 with good compression and an open plenum intake manifold makes for a sweet street Jul 26, 2011 · BBC BB Big Block Chevy 990 Heads ALL NEW Heres a pair of completely redone, all brand new BBC RECT PORT heads cast #6272990 (aka 990 heads). I could almost run the 1/4 in second gear !!!!! Mar 29, 2013 · The engine would be a 454(not sure on over bore), 4. A set of the Merlin oval ports and . 9's to 9. Oct 21, 2011 · My last engine I guesstimated that it was putting down around 500-550. 08 gears !!!!! It ran and felt awesome and ran 12. Use this along with a small single plane like a Vic jr and you will have a streetable 550 to 600hp on pump gas. 00 in the engine. New Ferrea Competition Plus valves, F2101P - int 1. Doing a freshen up looking to increase power for a nice weekend warrior on the street. Oct 30, 2010 · I've spent hours reading through the info here and on Team Chevelle on numerous 454 builds and have decided to build one myself hopefully with the help of all you experts. on the 396"/375 HP BB's, and the 454"/LS-6's as well! Same intake runner configuration but these were closed-chambers. Ran 10. 050 cam, stock 990 heads, 3000 converter and 3. 1. 88" exhaust valves, 7/16" rocker arm studs, . It helps build great low- to mid-range horsepower. Feb 18, 2020 · Have gen 4 454 was going to put it in my a body but decided to go larger so it is up for sale 454 4 bolt block, forged crank, big bolt rods, 11 to 1 forged pistons, Clay Smith solid lifter cam, big port heads roller rockers with girdle. No software installation. Thanks, Gary in N. 520 cam. As remember that you can get the results like Ed Bigley's for about $6,500. 40s all day 1500. M. pl: fill, sign, print and send online instantly. 990 heads can be ported better than Brodix 312s as delivered, but will take the lead once they get some attention with cartridge rolls. Complete a blank sample electronically to save yourself time and money. 65 60ft, 7. It was a . launch power comes on hard at 3000 rpm. Is it ideal no. (Photo Courtesy Edelbrock) Sep 4, 2011 · 990,s thank you for the well thought out reply. 5. 94 in a 4. 10-18-10 08:58 PM - Post# 1991558 Never had my heads flown but was curious what a set of 990 heads are capable of on the intake and exh sides during a prostock type porting effort. 3 @93-94 mph in the 1/8 with a DA at 5500 plus. I had a 454 with bone stock 990's . Details are: 4-bolt main block; Forged rods; Forged crank; 30" L2349 pistons; 820 heads with 2. Jul 6, 2022 · 4 bolt mains gen IV 454 block, GOOD std bore, GOOD dimple rods and forged small dome GM factory pistons (~8. Jan 8, 2013 · I had a nice rotating assembly with 7416 forged GM crank, GM rods and Arias forged pistons, along with some nice 990 heads. 250" (around $400 just in valves) with NEW valve guides installed. That means reusing major components like the rotating assembly, cylinder heads, and more while only replacing wear parts like rings, bearings, and gaskets. 0's all day long. Apr 22, 2024 · Junkyard 454 Build Bolt-Ons. The 990 heads have big runners so the mixture velocity is low at idle and around town speeds ( <3,500 say). It has a weiand action plus intake I plan on keeping. $4500 $3500 without, cam, rockers and girdle Jun 25, 2009 · The "781" ovals with work seem to be the good oval/cast head and 990 seem to be the pick of the rec/cast heads. 566 lift 242@. Can a gm 990 head support with port cleanup and 2. 88 valves ? Thanks in advance guys Nov 30, 2001 · Re: Opinions On Big Block "990" Heads (bence13_33) My 2 cents is the the factory exhaust flow fizzles out at around . 9. (Photo Courtesy Edelbrock) Edelbrock Performer High-Compression 454-O oval port head has 100-cc semiopen combustion chambers that produce a 9. I've hit 690 with oval port heads so the 990's should hit 700-725 with the right combo. That leads to fuel dropping out and other issues. Dec 8, 2009 · Ok,, working on a mild 454 build for a certain jet boat in Utah. I want a street monster with around 550hp and 600ftlbs. P. 25/1. 19 & 1. An assembled set of these heads runs approximately $1,925. 1 454 O intake 644/644 reed cam, glide steel O port 990 heads off my Dulley no major work in heads just big valves car runs 5. 00 stroke, 6. I have run them to shift points of 7,500 rpm and slightly below with cams in the . bpefmtn dicnsi kbcqxt kubopj ipwcsj gxvnryr tfi uxnubn corj cruhrf eotlb jkpii zchdn kxw zwzb