Which is better 350 or 400 small block
Which is better 350 or 400 small block. I asked that question once of a guy who built a LOT of chevy small block engines. Also, A larger crankshaft of 2. #5 · Mar 5, 2016. Mar 15, 2021 · Big block engines usually have displacements great than 400 cubic inches. 65-inch-diameter main journals, where the 350 (and other post-1967 small-blocks) had 2. 5156 posts · Joined 2007. 7" or 6. 5. 60ex), 6 inch rods and a roller cam. Fitted with the same 1M cast crank as the 221 and 260, the 289 also had the same C3OE rods. The bearings look better in them usually. Aug 1, 2008 · This happens because the 400 small-block uses a 3. 68; Our result is 631. Moreover, the crankshaft of the SBC 400 had a diameter measuring 2. If you are looking at a bare block (go take a GOOD look at a 350 block first), the sides of a 400 block bulge out to provide more volume inside for coolant. Why stick with 305-, 350-, or even 400-cubes when you can have a 427 cubic-inch small-block Chevy mill resting between the Mar 7, 2016 · The 427 cubic-inch big-block is an iconic engine. As for your 350 heads, they will fit, but you have to have a machine shop to drill the steam holes in the heads to match the 400 block. The 1975–1976 262 was a 4. Even with 2 bolts, it should be good to 450 hp or so, depending on how much you thrash it. Now, if you're using an aftermarket block, no question that 400 cubes will make more torque than 383 or 350. 905 bore and a 4 inch stroke, you either need to hone an LS1 just a touch, or take a 5. 2. The small-block guys will come in and May 1, 2016 · 4523 posts · Joined 2012. On the other hand, the 350 had 2. 7 rod lenght. But turning down the mains of a 400 Jul 9, 2015 · 1965 327ci Corvette Fuelie. (Image/Summit Racing) Jan 29, 2016 · Type: 350 Small-Block. But if the crankshaft is nodular or cast iron, you should get a dull thump sound. Why stick with 305-, 350-, or even 400-cubes when you can have a 427 cubic-inch small-block Chevy mill resting between the Mar 4, 2016 · 69chicken. 1. Pontiac 400 is a 4. 155" Bore X 3. Jan 9, 2015 · 1,217. The '70 version produced 350 horsepower and 415 pound-feet of torque. The 383 is meant to be a higher compression engine, using either the 5. ”. 030", if at all possible . )Yes. 750 (383) vs 4. 125. 400 uses a 5. Edelbrock 1406 Performer. 7" Rods Dec 22, 2006 · I think a couple of reasons are that pontiac motors cost a lot more to build, and there is an unlimited aftermarket for chevy parts whereas you are somewhat limited with the pontiac stuff. Over the years, displacement crew to 283, 327, and eventually 350, before Feb 24, 2019 · As the old adage goes, “There’s no replacement for displacement. Depending on the heads, you might run out of breath at a lower RPM, though. 59 posts · Joined 2008. Small block motors, including the 302, 327, 305, and 350, measure 9. Best Carburetors for Chevy 350 Review. Jan 28, 2003 · To build a 400 or a 383. I saw a article about a 400 bored over, 327 or 350 rods, and custom pistons that made above 400 hp & torque on the dyno. Dec 31, 2000 · IF the engine is assembled-----looking at the balancer is the fastest/easiest way to tell. Add in a 0. 54 posts · Joined 2006. I do not want to overbore more than . Whereas, the 400 small block will turn at 6,500 RPM at maximum. 48 inches while the 400’s is 3. Apr 30, 2015 · This can be added at the harmonic damper and/or flywheel. The less oversquare you have in an engine, the more torque that's produced. The holes have to be extremely accurately places. Do the 400 with a 5. Jan 24, 2014 · Critical for street use, torque production from our Easy Street small-block hovered near 400 lb-ft from 3,000 rpm all the way to 5,000 rpm. 400 hp would be easy to achieve for not much coin if the 350 is in good condition. 27-inch. right now I have a 350 in my nova but my dad has a 400 in his 64 chevy truck and he is selling the truck. The 400 engine is peculiar to Chevrolet, Chrysler, and Ford. Mar 24, 2020 · Add to that the small-block Chevrolet V-8 (SBC), the most prolific engine ever made. 0" rods. Nov 10, 2022 · The crankshaft of a small block Chevy should either be made of cast iron, nodular cast iron, or forged steel. Oct 11, 2004 · The problem with "More cubes" is that the 400 block can be more fragile than the 350 block. C. Jul 9, 2007 · On a stock 350 or 400 small block with a flat tappet hyd or solid cam and . But if you’re hauling, the 454 will stomp on the 350 in terms of horsepower, displacement, and torque. external. The Trick Flow 23-degree 195cc intake port heads are a great choice for a street-driven small-block 400 or even a 350. 4. Jul 26, 2013 · We decided to resurrect our 400ci small block Chevy that first appeared in the May '11 issue ("Build a 400ci Torque Monster for $2,500"), followed by its redemption story "Build Big-Hammer Power Mar 15, 2021 · Big block engines usually have displacements great than 400 cubic inches. 040- short con rods-+ good points- Ain't no cubstitute for cubic inches. As mentioned above, a 400 balancer has a portion of the outer ring recessed for balance purposes. The LT-1 reached a peak of 370 hp in 1970, before the L65 cratered out at 145 hp from 1973-1975. These engines tend to have a more characteristic “V” shape associated with V8 engines. SBC 400 features smaller connecting rods than SBC 350. Aug 30, 2006 · That comes out much stronger than a factory 4 bolt block where the bolts are all straight up. The LS’s extra weight is related to the block strength, which is much more robust than the small-block from years ago. 8 inches except for the 427, which measures 10. For me its nice to have the safety of the 388. Small blocks attain higher revolutions faster due to shorter strokes. Oct 29, 2008 · The 400 SB Will make the 400 H. In design, the pontiac 350 is like a stroked chevy 307, and the pontiac 400 has a lot in common with the chevy 400 from a bore/stroke ratio standpoint. If it is a factory look you want you can dress the 350 to look like a 327. If you want to build a 383, then you need any 307,327, or 350 block. Check Price at Amazon. Vortec Iron, Scoggin-Dickey Modified PN SD8060A2, $779. 6. The 289-2V V-8 was a hardy engine, long on power potential and reliability. This power comes at a price however, weight – those added Apr 30, 2008 · Deuce. Also, from what I have seen, cars sell faster for more money with chevy motors. Oct 5, 2003 · 400 bad points- subject to cracking at the steam holes to the head bolt holes on both the block and heads, tend to run a bit warmer, max performance bore of . In 1975, the highest output Chevy 350 engine was the LM1 at a measly 155 hp. May 8, 2014 · A head with 180 or 185cc intake runners will work well on a typical 350 Chevy street engine that makes 400 to 450 horsepower. It resulted in higher vibrations which the designers fixed with a harmonic balancer and a flexplate. chevy350cutlass Discussion starter. Apr 24, 2008 · The combination to get a 383 is to bore the block 30 over (to 4. 6 liters or 400 cubic inches, hence its name. It begins to get very pricey after you go beyond a 3. Well into its fifth generation, the SBC is showing no Mar 4, 2016 · 69chicken. if the 400 is a better motor im going motor swap them before he sells it . )You can't use the current pistons, and people typically use clearanced rods and/or small base circle cam. Feb 24, 2019 · As the old adage goes, “There’s no replacement for displacement. 5; 6,000x191. Disadvantage-Sometimes good blocks are hard to find. I have a 355 in my Nova and the car is plenty fast for the street. P with better $ Part's. It’s the first model year for the 400 small-block, which traces its origins back to a 265 cubic-inch powerplant from 1955. 75-inch stroke compared with the 350's 3. 65 inches and was balanced externally. 7" Rods 406 cid - (400 Block) 4. 030-over 400) small-block Chevy with a supercharger. So a 650 which is a common size is in range. variant, due to variations in bore and stroke. [4] Larger bores, longer strokes, bigger valves and ports can lead to truly astounding power production. I would never even consider the 400 main in any build. The 262 was installed in the Chevy Monza, Nova, and Pontiac Ventura. This 396 engine breaks that rule. You can tell if a crankshaft flange is forged by tapping the non-machined part with a small hammer. Oct 13, 2022 · The 350 itself saw declining numbers. 383 don't breath as well as a 400 due the smaller bore that shrouds the valves. The LS has a skirted design, which means the sides of the engine extend down May 1, 2023 · On the plus side, the Vortec intake port flows 42 cfm better than the stock heads at 0. 10 sec. The heads for the 400 have steam holes and all other SBC do not. 025 inches. Whether you own a sedan, a sports car, a truck, or any other type of vehicle, you can still buy and fix this engine in your vehicle to take you through any journey. 622 compared to a 4 inch bore and 3. 380 (350), etc) 400 heads also have steam holes in between Apr 26, 2012 · Go with a 350 and be done. 75" stroke, but the 350 has tiny 3. 3 and bore it out . If it’s a 383 stroker, you can probably go with 200cc intake runners. 5=1,149,000; 1,149,000/1,728=664. Oct 1, 2002 · Ive got the small block 400 which im planning on building up with aluminum heads (2. Dec 17, 2009 · Your question was best bang for the buck, which is undoubtedly the small block. 40 inches between cylinder centers. 8L 400 cubic inches V8 engine was considered one of Chrysler’s most powerful engines. 1993 to 1996 LT1 power metal 5. 68 cfm for our 383 stroker build. Boil, Boil, Toil, and Trouble. L-29 461 BBC 11. 125 x 3. For a street engine or street/strip engine i would go with the large journal for a few reasons,,,, - cheaper rods. 08in 1. However, they will also say the big-block delivers more torque, and has the advantage of better head flow, so it can overcome the extra weight disadvantage. I was lucky to get a really nice 350 block (heavy casting four bolt). Feb 4, 2009 · 9464 posts · Joined 2007. 898 and a stroke of 3. See All 18 Photos. It features a 90-degree angle between the cylinder banks, providing a balanced and smooth operation. 350 main sized cranks are easier/cheaper to find. 350, the SBC 400 stroker did not come out as the winner. d. Can be destroked if you like larger than a 350 but want one that will trun more RPM. Adam. Balance job $200. #1 · Apr 21, 2009. Also in 1963, Ford introduced the 289 High Performance V-8, a more powerful version of this Apr 13, 2021 · 400ci/508-hp Stroker Small-Block Chevy Long-Block, $5,699. Rebuilding the classic 350 on a budget, but aiming for Jun 1, 2018 · An engine configuration with a very short lifespan, offered in just two model years. If you want more than 400 horsepower or are concerned about weight, go the LS route. i. When you are done the ONLY difference is the 400 has more cubes, so it makes sense to go 400 instead. Compression is a critical aspect as well, and tuning it correctly increases the potential for higher power without sacrificing the engine’s reliability. The old saying that "most carburetor problems are electrical" meaning distributor still holds a lot of truth. 45-inch in diameter. And 400+H. small bores means small valves and small breathing. If you don't have a 350 block now there is no advantage to the 383 over the 406. a 400 is the only externally balanced generation 1 small block. Should I build a high reving 355. I ran the numbers on mortec on the 396 and the heads are 71 402, so the question is when was the block made would determine if it's a 396 or 402 because the casting number was used Feb 1, 1999 · 815 Hilbert Rd: Fallbrook, CA 92028-1608: 760/723-0340. A stroked 400 is larger. )Internal, depending on what you want to do with it. May 1, 2016 · 4523 posts · Joined 2012. The 350 has a stroke length of 3. Dec 7, 2022 · The shared water jackets were removed to achieve the ⅛ inch bore diameter. 030-inch overbore and the displacement formula spits out 382. The 2 bolt vs 4 bolt main 350 is just one of the decisions you’ll need to make, and knowing the power level you’re building for will Chevy 350 Engine. 125 inches and the crankshaft stroke to 3. The muffs you use can limit the delivery truck sound, but thats a bandaid. Later, custom bore and stroke 365 small-blocks, 377, 383, and 406 displacements appeared on the hot-rodding scene. That being said. The bore of the 400 is 4. Referred to as a "small-block" for its size relative to the physically much larger Chevrolet big-block engines, the small-block family spanned Aug 17, 2021 · The cam profile was lumpy and had less than 11-inches of vacuum at 1,000 RPM. 48-inch stroke. Mar 18, 2024 · When comparing a 400 small block vs a 350, one key difference lies in the flexplate and the inch bore spacing. Small Block Dimensions. 75-inch stroker crank. There's also hugely more 350 cores to select from than 400 cores. P easier . The new cam came in at 218/224 With this significant hp, your small block 400 will perform with the highest fun. 70 SS Camaro, 454 Alum. You will need a Good Coolant System with one . 350 Main will support big (I've seen 1,500ish+) horsepower, along with leaving more material in the block and cap for better clamping. stroker, for instance 4. Edelbrock 1406 Performer 600 CFM Square Bore 4. If I got it, I would probably put aluminum heads on it with big valves and a roller camshaft. 7 LS1 engines had a bore of 3. Aug 30, 2003 · That comes out much stronger than a factory 4 bolt block where the bolts are all straight up. Which is better 350 or 400 small block? The chevy 350 small block provides a limitless RPM compared to its counterpart. The 6. Not really a great sound for a car. 350 bad points- belly button factor (everybody has one)- some have head cracking problems-+ good points-relatively Dec 21, 2023 · A small block is better at handling and acceleration is made while a big block produces more torque and power. Advertisement Apr 17, 2024 · Though big-block engines are significantly larger than their small-block brethren, the true difference between these two is more about displacement, bore, and stroke than strictly size. Aug 25, 2022 · Are you confused about 400 small block vs 350 due to their similar block design? Let's check out this post for a detailed comparison of these two engines. Feb 21, 2009 · Re: Small Block 350 vs 400. 500-inch lift and 18 cfm better on the exhaust side. Oct 22, 2020 · Size and shape: Small block engines are smaller than big block engines. Apr 21, 2009 · jwe Discussion starter. In contrast, the Chevy 350 CID engine uses a bore of 4. We start off with an entry-level buildup—one that countless enthusiasts embark on every year. The Chevy 350 is a Chevy small-block engine used in almost any vehicle model and size. In 1963, Ford pumped up the bore size to 4. Aug 19, 2012 · Here's a rundown of what it costs to have Pfaff Engines chuck a block up in its five-axis machining center and boring machine: Bore and finish hone cylinders: $194. 7-liter LS engine test complete, we removed the LS and replaced it with our iron-headed 355ci small-block Chevy. It`s the only small block to use 5. 2 inches. With a static compression ratio of 9. Feb 3, 2004 · Basically its just an availability of parts. But I think the Early 350 4-Bolt engines are Stronger . Apr 19, 2024 · The new 350 used the same engine block as other SBC engines, with 4. An engine with an hp above 300 means it is serious about its performance. Crowding this into a 350 block normally Sep 27, 2019 · To maintain the same compression height for the 400 small-block as the 350 engine, Chevrolet used a shorter, 5. There are lots of contributors to engine surge, the carb can or not be one of them. 7 rods $100. 000 x 4. We then pulled the flat tapped parts out of the small-block and slid in a roller cam. Dyno target: 325 hp. Or, should I go for cubic inches and build the 400 small block, with the ever popular controversy of the over-heating problem. The 400 has a bigger bore potential than a 350 and the bigger the bore the better heads you can put on it. #5 · Apr 30, 2008. If cost is the major issue and you already have the 350, keep it and build it. For an engine running a blower, nitrous, or going racing a full floating pin is the better choice. Over the years, displacement crew to 283, 327, and eventually 350, before Feb 21, 2015 · Here's a 400+ HP 406 short block formula for that's good until 5500 RPM and can be done for $1100 if you have a block. A 350 just has to work harder to get the job done and if you already have the 400 SBC then it is a no brainer. It is ideal if you’re not spinning or towing. May 9, 2023 · With the 5. Chevy 400 and 454 are often externally balanced. It dyno'd at 460 hp Oct 26, 2020 · While building the 350 Chevrolet engine, I point out several differences between the small block Chevrolet and Mopar and try to come to a conclusion about wh Feb 5, 2019 · A big block engine is physically larger and weighs more than a small block. All other small-block variants used 5. Using a 650-cfm four-barrel carburetor will be perfect to feed this Jan 16, 2023 · Impala aficionados will appreciate that the 1970 edition came with an abundance of engine choices, including the option in this corroding Chevy. Also, some of the later style aluminum water pumps with a serpentine-belt drive Dec 11, 2007 · 400 Small block Advantage-Easy to get lots a low rpm TQ and mid range HP. Jul 26, 2013 · We decided to resurrect our 400ci small block Chevy that first appeared in the May '11 issue ("Build a 400ci Torque Monster for $2,500"), followed by its redemption story "Build Big-Hammer Power Feb 13, 2024 · Engine Configuration. The engine responded with initial power numbers around 370 horsepower Oct 8, 2009 · However, a 400 and a 350 are both small blocks, but they are different in many ways and these ways you need to know before you dive into one. Oct 18, 2008 · The 350 and 400 share the same 3. 75 stroke. Feb 11, 2021 · The original small-block Chevy weighs in at 190-pounds. YUP, I have 3" pipes on my 355. General Motors achieved the 400 SBC engine's displacement by increasing the bore to 4. HOWEVER, let me introduce the combos I am considering: 383 cid - (350 Block) 4. 95=631. Vortec 062's 406 w/hyd. 400 mains are stronger, 350 mains have less friction. 030" Bore X 3. Among the small block engines, the Chevy 350 engine is considered to be one of the best engines of the 20th century. Forget the highwinding 327 if you drive Sep 27, 2014 · So if I find a good block for $300-400 and then get some machine work done for say $800-$1,000, I'm into a bare unassembled but ready to go GM 400 block for around $1,500 or under. Anything smaller than that means it’s a small block. More races have been won with 350 Chevrolet engine than with 351 Ford engine May 1, 2006 · By '70, Chevrolet released the big-inch 400 small-block. (Oversquare is bore vs. Most formulas will tell you 600 to about 610 CFM for a 6000 RPM 350 engine. 876 bores while the 400 has 4. Machine deck surface: $169. ) Yes. First, the 400 was the only Chevy small-block to have the larger 2. #4 · Nov 26, 2014. Apr 1, 2002 · A 350, 355, 383, or a 400. Be careful of the lure of large displacement small blocks. Big blocks usually measure 9. it`s the only small block to use steam holes in the block deck and heads. The Chevrolet small-block engine is a series of gasoline -powered V8 automobile engines, produced by the Chevrolet division of General Motors between 1954 and 2003, using the same basic engine block. 030 x 3. Regardless, you should always send your rotating assembly out to a properly equipped machine shop to have the final balance done. According to Eagle Specialties, Chevy 305 and 350 engines are typically internally balanced applications. The engine has a displacement of 6. I've just put together a 406ci (0. 65 inches, higher than SBC 350, was introduced. Power output for 1975 was 110 hp and was replaced by the 305 for the 1977 model year. ) 383 crank (different than a 400 crank) and 383 pistons (different than 350 pistons) 3. As for sheer numbers produced the 350 WINS by a large margin. The 350, may be a little higher in power, and is easier to find parts for. Jun 8, 2021 · Those 5. The 400 small-block had a two-barrel carb, while the 402 came with a four-barrel, and the difference in power is accurately Nov 26, 2014 · 10098 posts · Joined 2005. Typically, big-block engines have displacements of greater than 400 cubic inches and small block engines have a smaller displacement. 93; 664. 750" Stroke - 5. 00 inches and a stroke of 3. Jan 3, 2012 · The thing is with a large pipe exhaust and a small block it will start to sound like a delivery truck or old school bus. If you can find a 400 main sized crank that you like I would go that route for the added strength. 565 rods. 00-inch cylinder bore diameter and 5. Really, the only small block Chevy 350 engines capable of any performance were the LT-1, ZQ3, and L82s. And while the LS aluminum block comes in at only 115-pounds, the iron units are 215-pounds. And it was not that long time ago when the 350 engines had some serious street cred. 025 or so on the mains a standard pump is all you will ever need. 800 or 3. The smaller intake port will generate excellent velocity which will help with throttle response and still make great power. The cranks are interchangeable other than the balancing, internal vs. A 383 is a stroked 350 with a 400 crank. For a long pump these measurements come out to 7-inches for the small block long pump and 7-1/4-inch (7. But to be honest, NO need for 3" pipes on ANY 350. Jan 7, 2021 · Because of the unique design and production features of the 400, dropping its crankshaft into a 350 wasn't originally as easy as all that. Putting a higher flow head with 220cc runners on a relatively stock 350 would be going in the wrong direction. Mar 4, 2024 · The small block Chevy casting numbers will tell you exactly what you have, as externally, it is difficult to tell whether you’re looking at a two-bolt 307 small block Chevy or an SBC 350 4-bolt main engine. 9 cubic inches. Edelbrock 1406 is a well-rounded carburetor for street performance Chevy 350s. cam and stock rocker arms. . Apr 7, 2015 · Go to a milder cam, etc. Stock or after market used crank $200. 48 inch stroke in a traditional small-block 350. A good block is still weaker in the webbing than a 350. scottybaccus, Aug 30, 2006. Weight: While small block engines may not produce as much power as big blocks, they make up for it in being lighter-weight. May 30, 2008 · IMO the only reason to ever build a sbc using a 4 inch bore block is if you already have a 4 inch bore block. GM had to cast the block for the 400 The best years of Chevy 350 engine are 1970 LT-1, 1992 L98, and 2002 L31. The stock LS1 puts out more power than any modern production 350 and is lighter due to the aluminum block. 00-inches to create the 289-ci small-block. 75 Jun 18, 2021 · For example, let us calculate the cfm for a 383 small block Chevy stroker engine that will see a maximum of 6,000 rpm and has a VE of 95 percent: 383/2=191. If a small block is a quick and nimble welterweight boxer a big block can be devastating heavyweight. On a Dart block wtih priority main oiling, solid roller without restrictors and spring oiliers a high volume will be needed. We’ve done this on a few occasions, and I Dec 1, 2010 · from Koolsville, Okla. So if you’re contemplating 400 small block vs. If you have the parts to build a 383 its probably not worth it to go hunting down a 400 block. The 350 small block is a great engine, but it does not come close to the performance of the 454 big block engine. It may be the most beloved internal combustion engine of all time, thanks to its performance, durability, adaptability, and accessibility. 5" rod. 267. The stroke increase over stock is 0. Jun 8, 2023 · Internal Dimensions. 002 or so on the rods and . Ray. The shop I worked at, did a 383 and made it look like a factory 327. The 400 small-block engine has a larger bore diameter compared to the 350, which affects the flexplate size. It starts every time, offers instant throttle response, and you’ll never experience bogging up. Even in a debate of Chevy 400 vs. 48 inches. 65@125mph 406 with home ported Dart 215 heads. But I was just teased on a deal for a 396 big block bored 30 over (which makes it a 402ci) and its all redone pushing 430hp. Most big block motors are at least 4oo cubic inches. Big Block Vs. Remember, too, the better your rotating assembly is balanced, the longer it will last. Definately though, my next small block will be a 406 or a step further to a stroker. #2 · May 1, 2016. Today, more than ever, that maxim rings true with many auto enthusiasts wanting a stroker engine and every engine builder seemingly offering one. 875 inch stroke, (415-421 cid). Both the Ford 351 and the Chevrolet 350 are excellent engines. These blocks utilized Siamese-bore cylinders to make room for the large displacement. 10. 250-inch) for the big block long water pump. 93x. 700-inch-long rods. The crank will produce a high-pitched ring sound. 45-inch mains. - blocks more available (350 block) In a high RPM 327 i would want the small journal, small rod journal cranks i prefer. Jan 25, 2023 · The 400 heads to stay away form are the 487-X heads as the X means they are 80cc's so the 350 will have super low compression. 7:1, these power Dec 12, 2007 · It also was once popular to destroke the 400 with a 350 crank using a special bearing with an extra thick back, or putting purpose made fillers between the 400 block saddle and a standard 350 bearing. His answer: basically, when you build a 383, you are trying to build a 350 into a 400. A brand new bare Dart SHP block is $1,650 with a 2 piece rear main seal or $1,750 for a 1 piece. which is better a 400 sbc or a 350 sbc . We start rolling in earnest with Pace Performance's offer here for BluePrint Engine's 400-cubic-inch small-block Chevy Oct 18, 2008 · The 350 and 400 share the same 3. 030 inches) and use a 3. Since its 1955 introduction, more than 108 million have been sold. Nov 9, 2020 · 1. The Chevy 400 Small Block engine falls under the category of a V8 engine, meaning it has eight cylinders arranged in a V-shaped configuration. 7-inch connecting rod length. 6 ci, which car Jan 16, 2023 · Impala aficionados will appreciate that the 1970 edition came with an abundance of engine choices, including the option in this corroding Chevy. Like. Speedpro H615CP30 pistons $180. P easy . Mar 29, 2021 · Cylinder Heads for a 400-Equipped Chevy Truck. In 1970, the gen-one small block grew to its largest factory displacement of 400 cubic inches. The big-block guys will say that the small-block weighs less, and therefore should have an advantage. 3 L small block with iron block and heads. 121 bore 3. Again, though, the best way to confirm is by measuring from the gasket surface to the water pump pulley hub surface. 750 (400) vs 4. 565-inch connecting rod length. It also used the same 4. 125 inches, which is larger than the 350’s 4-inch bore. 5951 posts · Joined 2002. May 19, 2007 · I am mainly concerned about the 350 Block vs 400 Block strength and overheating issues . 121" bores. And The 350 can Make 375 H. 00. However, Chrysler’s 400 is a big block. (not as much material) 4 bolts are weaker than 2 bolts. 75 inches. Dec 16, 2013 · Using a factory 400 production block as the basis, Henderson didn't alter Chevrolet's basic layout, but instead put together the familiar 406 combination arrived at by retaining the factory 3. « Reply #9 on: February 22, 2009, 06:01:22 PM ». SHARE POST #28. 75 inches – actual displacement is just over 400. Mar 5, 2024 · For instance, a 350 cubic inch small block might require a different approach compared to the larger 400 c. It depends on what you want. To make a 383 stroker LS, which utilizes a 3. 10@118mph 9-30-22. #2 · Feb 4, 2009. The introduction of 1969 brought us four-bolt main bearing caps, but also marked the last year of the 327ci engine, and the 302ci engine. 400 big block, the contemplation would depend on the exact manufacturer you’re considering. This is like the old debate " Chocolate VS Vanilla ". jr id si fi kj vj my pg nx qk