{"id":44950,"date":"2020-10-29T12:00:07","date_gmt":"2020-10-29T16:00:07","guid":{"rendered":"http:\/\/www.dodgegarage.com\/news-api\/?p=44950"},"modified":"2024-03-25T11:22:12","modified_gmt":"2024-03-25T15:22:12","slug":"gen-iii-hemi-engine-quick-reference-guide-part-iv","status":"publish","type":"post","link":"https:\/\/test.api.dodgegarage.com\/news\/how-to\/2020\/10\/gen-iii-hemi-engine-quick-reference-guide-part-iv.html","title":{"rendered":"GEN III HEMI®<\/sup> Engine Quick Reference Guide Part IV"},"content":{"rendered":"\n

MORE CUBES AND MORE POWER: 2011 – 2021 6.4L\/392 HEMI\u00ae<\/sup> V8 ENGINE<\/strong><\/h1>\n\n\n\n

So far in this series, we have covered the beginning of the great HEMI\u00ae<\/sup> engine, the 5.7L V8 years 2003-2008<\/a>. Next, we moved onto the refined recipe of the 5.7L V8 that included 2009-current year<\/a>. In part III, we moved away from the 5.7L V8 and introduced the bigger and badder 2005-2010 6.1L V8<\/a>. In this installment of the GEN III HEMI Engine Quick Reference Guide, we are going to talk about the highly coveted 6.4L\/392 HEMI V8 engine. <\/p>\n\n\n\n

The 6.4L\/392 HEMI V8 engine was first introduced in 2011 in the\npassenger car line as a replacement for the 6.1L HEMI engine. With its increased\nsize, this new engine was even more of a powerhouse over its replacement on\nSRT8 vehicles. Even though 6.4 liters translates into 392 cubic inches, it\nbears no resemblance to its great HEMI ancestor of the late 1950s that had the\nsame displacement. This next iteration of the modern big-inch HEMI engine was first\nused in the 2011 Challenger SRT8 and eventually Charger SRT8 models before\nbeing an option on the Jeep\u00ae<\/sub> Grand Cherokee SRT\u00ae<\/sup> and Dodge Durango SRT SUVs.\nSince its debut, the marketing of the engine\u2019s displacement size on the front\nfender emblems and on the engine coil pack covers can say either \u201c6.4L\u201d or\n\u201c392\u201d depending on year, brand and nameplate. <\/p>\n\n\n\n

\"HEMI<\/figure>\n\n\n\n

Despite the confusion this might cause among enthusiasts, the 6.4L\/392 HEMI engine has basically the same internal parts regardless of if the engine came out of a Challenger\/Charger or Durango\/Grand Cherokee SRT. The factory horsepower and torque ratings on the 2011 to 2014 engines was 470 hp @ 6,000 rpm and 470 lb.-ft. @ 4,200 rpm. In 2015, the 6.4L\/392 HEMI engine got a bump in horsepower to 485 hp @ 6,100 rpm, while torque was increased to 475 lb.-ft. @ 4,200 rpm, due to a revised intake manifold and tuning. The Jeep Grand Cherokee SRT and Durango SRT models have to settle for 475 hp @ 6,000 rpm and 470 lb.-ft. @ 4,300 rpm because of a more restrictive exhaust manifold design for engine packaging to accommodate the SUV’s AWD drivetrain. <\/p>\n\n\n\n

The changes include oil pan and exhaust manifolds between these two platforms. The 6.4L HEMI engine has also been available in the Ram 2500\/3500 HD trucks since 2015-2016, but we\u2019ll get into that later in this feature. When Dodge introduced the Scat Pack Challenger and Charger models beginning in 2015, they came standard with a 392 HEMI V8 engine. With robust sales of the Scat Pack, there\u2019s plenty of good used 392 HEMI engines out there in salvage yards and swap meets. But before you head out on your HEMI engine hunting adventure, here\u2019s what to look for if you\u2019re on a mission to score a 6.4L\/392 HEMI V8 engine for your Mopar\u00ae<\/sub> retsomod project.<\/p>\n\n\n\n

\"HEMI<\/figure>\n\n\n\n

Before we do a deep dive into\nidentifying late-model HEMI engines, this handy bar code label decal can be\nfound on the valve cover of virtually any GEN III HEMI engines. It indicates\nengine displacement size, build date, part and serial number. Here\u2019s an actual label from a 6.4L\/392 HEMI\nengine and how you can decipher the bar code label\u2019s numbering system. <\/p>\n\n\n\n

\"engine<\/figure>\n\n\n\n

For\nexample, on this particular bar code label, you see the number TNXE6 1133 1\n1260<\/strong> and here\u2019s what it means:<\/p>\n\n\n\n

TOP LINE:<\/strong><\/p>\n\n\n\n

TNXE6 1133 1 1260<\/strong>
TNXE6: Engine Assembly Plant, this is the code for Saltillo Engine Plant (SEP)
1133: Is the Julian Date Code 1133 which is the 113th day of 2013 (April 23, 2013)
1: Shift number
1260: Engine serial number <\/p>\n\n\n\n

BOTTOM LINE:<\/strong><\/p>\n\n\n\n

P04893288AA  6.4L  AA<\/strong>
P04893288AA: Engine part number
288: Last 3 numeric digits of the part number
6.4L: Engine displacement
AA: Part number revision level <\/p>\n\n\n\n

\"engine<\/figure>\n\n\n\n

ENGINE BLOCK\/ROTATING ASSEMBLY <\/strong><\/h2>\n\n\n\n

The 6.2L\/392 HEMI blocks can be identified with casting number\n5037473BE or 5037473BG and has \u201c6.4L\u201d cast above the oil pan rail. Like the\n6.1L HEMI engine it replaced, the 6.4L\/392 HEMI blocks come painted orange and\nare machined and assembled at FCA\u2019s Saltillo Engine Plant. Note \u2013 some 6.4L\/392\nHEMI blocks can also be painted black if they\u2019re a Mopar service replacement\nblock or are out of a 2015-2020 Ram 2500\/3500 HD truck. Like all GEN III HEMI\nengines, the 6.4L\/392 version uses cross-bolted main bearing caps and\naluminum twin-plug HEMI heads. With the advent of the 6.4L HEMI truck engines,\na thicker block was cast and used across the entire engine platform (that\nincluded 392 HEMI engine-powered cars and SUVs around 2017-2018). These blocks are\nknown as \u201cBig Gas Engine\u201d or BGE for short. Both \u201cBG\u201d and\/or \u201cBGE\u201d will be cast\non the side and\/or on the back of the block. These blocks might be hard to come\nby if you\u2019re looking for a used 6.4L\/392 HEMI engine, but their high nickel content,\nsuperior casting and slightly shorter water jacket (which provides increased\ncylinder wall rigidness\/strength) are a huge bonus for serious horsepower engine\nbuilds. <\/p>\n\n\n\n

\"engine<\/figure>\n\n\n\n

The bore and stroke are 4.09 inches and 3.72 inches on all\n6.4L\/392 HEMI engines. They also come stock with a forged-steel crankshaft that\ncan take a lot of punishment. The factory compression ratio is a healthy 10.9:1 and the\nengine redline is 6,400 rpm. Like the 6.1L HEMI engine, the newer 6.4L\/392 HEMI engine\nrequires premium fuel for best performance. Like the 6.1L HEMI engine, the 6.4L\/392\nHEMI V8 engine uses Hypereutectic pistons (with oil squirters\nto reduce heat) and a floating pin. It\u2019s attached to a powdered metal I-beam connecting\nrod with a cracked cap design (eliminates the possibility of reversing or\ninterchanging the rod caps). The length of the rod is 6.200 inches\ncenter-to-center (same as SRT Demon, SRT Hellcat and SRT Hellcat Redeye 6.2L HEMI engines). <\/p>\n\n\n\n

\"Engine<\/figure>\n\n\n\n

CYLINDER\nHEADS\/CAMSHAFT <\/strong><\/h2>\n\n\n\n

As with all GEN III HEMI V8 engines, the 6.4L\/392 HEMI engine uses an aluminum twin-plug cylinder head with an improved port and chamber design and larger valve sizes than the 6.1L HEMI engine it replaced. The passenger car\/SUV 6.4L\/392 HEMI cylinder head can be identified by casting numbers 5037369BD or 68166435AA-A02 depending on the year. Regardless, the intake valve diameter measures 2.14 inches and the exhaust comes in at 1.65 inches. The valve lengths and valve spring heights are increased on the 6.4L\/392 HEMI engine over the 6.1 HEMI engine to accommodate the revised port design and improved hydraulic roller camshaft. Speaking of production camshafts, you\u2019ll be pleased to know the 6.4L\/392 HEMI engine has 286 degrees of intake and 288 degrees of exhaust duration, while the intake lift is .571 inches and .536 inches on the exhaust. <\/p>\n\n\n\n

While the automatic transmission-equipped 6.4L\/392 HEMI V8 engines use a Multi-Displacement System (MDS), manual transmission versions of this engine do not have MDS (similar to the 2009 to current 5.7L HEMI V8 engines). If you\u2019re swapping an MDS-equipped 6.4L\/392 HEMI engine into an older Mopar vehicle, there are components available to eliminate the MDS system to simplify tuning. One thing you should know, all 6.4L\/392 HEMI engines (including Ram 2500\/3500\/4500\/5500 trucks) use variable cam timing (VCT) and can be retained if you\u2019re doing a modern HEMI engine swap into your vintage vehicle. The aftermarket has tuners available to accommodate this feature, but if you prefer, there are also numerous non-VCT GEN III HEMI performance camshafts available. <\/p>\n\n\n\n

\"HEMI<\/figure>\n\n\n\n

INTAKE\/EXHAUST MANIFOLDS<\/strong><\/h2>\n\n\n\n

Unlike the 6.1L HEMI engine it replaced, the 6.4L\/392 HEMI engine did not have\nan aluminum long-runner intake manifold. Instead, the 6.4L\/392 used an \u201cactive\u201d\nintake manifold constructed from black composite plastic. It has a front feed, 45-degree\nside-mounted throttle body that\u2019s 80 mm in diameter. There\u2019s also an \u201cactive runner\u201d feature that electronically\nvaries the intake manifold\u2019s runner length for optimal horsepower and torque. This\n6.4L\/392 HEMI intake manifold may not look as sexy as the cast aluminum intake\nmanifold found on the 6.1L HEMI engines, but they work very well for many race and street\napplications. When it comes to getting rid of the spent exhaust gases, the\n6.4L\/392 HEMI engine uses a tubular free-flowing exhaust manifold on passenger car\napplications and is great to use other non-factory applications like on older\nMopar vehicles. These tubular exhaust manifolds almost look and act like\n\u201cshorty headers\u201d and are basically the same as found on the 2005-2010 6.1L HEMI\nV8 engines. These exhaust manifolds can also be used on other non-factory\napplications when dropping a GEN III HEMI engine into an older Mopar car or truck. If you\u2019re doing a swap using a 6.4L\/392 HEMI engine from an SUV, the cast exhaust\nmanifolds may not be the best choice. <\/p>\n\n\n\n

\"HEMI<\/figure>\n\n\n\n

QUICK\nREFERENCE CHART – 6.4L\/392 HEMI V8 PASSENGER CAR\/SUV ENGINES<\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"HEMI<\/figure>\n\n\n\n

RAM\nMD AND HD 6.4L HEMI V8 \u2013 KNOW THE DIFFERENCES <\/strong><\/h2>\n\n\n\n

As we mentioned earlier in this feature, the 6.4L HEMI V8 engine was also used in Ram 2500\/3500\/4500\/5500 in Medium Duty (MD) and Heavy Duty (HD) truck applications going back to around 2015. While the block cylinder heads and rotating assembly offer a great foundation for building a GEN III performance project engine, the truck engine is designed more for low-end torque and heavy load applications. There are some major differences between the HD truck 6.4L HEMI V8 and passenger car\/SUV 6.4L\/392 HEMI V8 engines you need to be aware of. If one of these pops up at a cheap price, just know what you\u2019re buying. The first difference is that the intake manifold has a top-feed mounted throttle body, and this design has a runner length that\u2019s designed to make max power from 3600 rpm to 5000 rpm. The compression ratio is also lowered to 10.0:1 because of a piston change from the passenger car\/SUV 6.4L\/392 HEMI V8 engines. <\/p>\n\n\n\n

The truck engine still uses a Hypereutectic piston w\/oil squirters to reduce heat and a floating pin design that\u2019s attached to a powdered metal I-beam connecting rod. The twin-plug aluminum cylinder head on the truck engines still retain the massive 2.14-inch intake valve and 1.65-inch exhaust valve found on the SRT and Scat Pack vehicles. The cylinder heads are also cast from high-grade T356 aluminum material to withstand any detonation and high-temps under severe towing conditions. <\/p>\n\n\n\n

They have a unique casting number of 05045468AE and 68166435AA, AB, AC and AD. This head casting was also used on the 2015 Mopar Challenger Drag Pak engines. The exhaust manifolds on the 6.4L HEMI truck engines are a cast iron design that are more restrictive than the tubular style found on the passenger car\/SUV applications. Most folks will probably discard the factory cast iron exhaust manifolds in favor for aftermarket headers during their engine swap project. The camshaft on the HD truck engines is also designed for low-speed torque and not higher rpm horsepower. The net result is a horsepower rating between 366 to 410 @ 5,600 rpm and torque coming at 429 lb.-ft. @ 4,000 rpm. When it comes to out-of-the-box modern performance engines, the stock HD truck 6.4L HEMI engine is not a strip blazer, but with its BGE casting block, 356 aluminum heads, and steel crankshaft, you\u2019ll have a great foundation to build a high-performance engine combo with strong bones to withstand close to 1,000 horsepower. <\/p>\n\n\n\n

\"HEMI
2020 Ram HEMI\u00ae 6.4-Liter V-8<\/figcaption><\/figure>\n\n\n\n

QUICK\nREFERENCE CHART – 6.4L HEMI V8 RAM MD AND HD ENGINES<\/strong><\/h2>\n\n\n\n
\"\"<\/figure>\n\n\n\n
\"HEMI<\/figure>\n\n\n\n

With over 100,000 6.4L\/392 HEMI V8 engines produced for almost a\ndecade, they\u2019re turning up in salvage yards and swap meets at a relatively low\ncost. It might be an old clich\u00e9 but it\u2019s true, there is no replacement for\ndisplacement and the 6.4L\/392 modern HEMI engine is a great foundation to build upon. If\nyou\u2019re looking for some help in parts and advice, these great companies can\nhelp you out!<\/p>\n\n\n\n

Mopar.com<\/a>; Holley.com<\/a>; Edelbrock.com<\/a>; RosevilleMoparts.com<\/a>; ManciniRacing.com<\/a>; ShopHEMI.com<\/a>; MMX Modern Muscle Xtreme<\/a>; Cleveland Power and Performance<\/a> <\/p>\n\n\n\n

Next week, we discuss the record-setting and ground-breaking SRT Demon, SRT Hellcat and SRT Hellcat Redeye supercharged 6.2L HEMI V8 engines! <\/p>\n\n\n\n

All GENIII HEMI Engine Quick Reference Guides:
Part I<\/a>
Part II<\/a>
Part III<\/a>
Part V<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"

MORE CUBES AND MORE POWER: 2011 – 2021 6.4L\/392 HEMI\u00ae V8 ENGINE So far in this series, we have covered the beginning of the great HEMI\u00ae engine, the 5.7L V8 years 2003-2008. Next, we moved onto the refined recipe of the 5.7L V8 that included 2009-current year. In part III, we moved away from the 5.7L V8 and introduced the bigger and badder 2005-2010 6.1L V8. In this installment of the GEN III HEMI Engine Quick Reference Guide, we are going to talk about the highly coveted 6.4L\/392 HEMI V8 […]<\/p>\n","protected":false},"author":29,"featured_media":44956,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[639],"tags":[2011,547],"class_list":["post-44950","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-how-to","tag-hemi-engine","tag-mopar"],"acf":[],"custom_fields":{"post_thumbnail_image":"https:\/\/test.api.dodgegarage.com\/news\/wp-content\/uploads\/2020\/10\/GENIIIHEMIPIV.png","icon_selection":"article","external_link":"","featured_article":[],"upload_background_image":""},"_links":{"self":[{"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/posts\/44950"}],"collection":[{"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/users\/29"}],"replies":[{"embeddable":true,"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/comments?post=44950"}],"version-history":[{"count":22,"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/posts\/44950\/revisions"}],"predecessor-version":[{"id":45569,"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/posts\/44950\/revisions\/45569"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/media\/44956"}],"wp:attachment":[{"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/media?parent=44950"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/categories?post=44950"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/test.api.dodgegarage.com\/news\/wp-json\/wp\/v2\/tags?post=44950"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}