How much hp can a 2 bolt main 350 handle The build has to compliment itself. Sep 21, 2007 · I know that the GM literature says 350 HP (which I find ridiculously low personally), but what do the experts here think one can take in a street strip setup? This is part number 10066034, standard 4" bore, 4 bolt grey iron main caps. How much power can I put on these stock parts. (I think I read somewhere the limit is around 600 HP)-use some new ARP studs/bolts for the mains. com, it stated that "Factory production blocks with 4-bolt main caps can reliably 800 HP. Oct 22, 2006 · Just a simple question, how much power (torque/hp) can a 350 with a 2 bolt main withstand without having to worry about breaking anything? Mar 4, 2024 · The factory 2 bolt main blocks are suitable for moderate horsepower levels you’d find in the typical street performance build. Oct 16, 2023 · Chris, I can't say what the limit of a 2 bolt main block is, only my experience. My studded 2bolt 454 block has lived for ten years with 600 hp and I know people that makes over 700 hp with 2 bolt blocks. Running a GM crank and 2 bolt main block shifting at just 7,000, been fine for over 7 years. Apr 10, 2015 · A two-bolt main, cast crank bottom end, properly machined and assembled would be good for at least 550-600 hp. 600 HP reliably, you need an aftermarket block. I'm expecting 600 plus hp. Factory 4 bolt main? We are talking late 60's early 70's blocks (back when they were good). This is due to the increased stability and strength of the 4 bolt main design, which can withstand higher stress levels than the traditional 2 bolt main design. If you’re planning a basic junkyard 350 small block build under 400 horsepower the two bolt main block is up to the task. 030" my 70 52K block, decking to get the quench in the 0. never blew up & can't now remember what happened to it. Everything on the rotating assembly is stock. Feb 3, 2021 · Problem with factory 400 4-bolt caps is the location of those outer bolts. Jan 13, 2005 · I put together a mild 350 small block chevy several years ago for my 69 Camaro. 49 @ 126, 3535 lbs with a 200 shot. The 289 block has been fitted with ARP bolts, uses 4340 forged Scat crank with Eagle H-beam rods (using L19 bolts). block # is a 14093638. We'll find out soon because this will also get a 150 shot of NO2. Jan 10, 2005 · Patrick , I'm presently building a 454 : 2-bolt, cast crank and truck rods. it is a 2 bolt main block. A 4 bolt and for that matter a 2 bolt main block will handle quite a bit of HP and Torque if it not reved to high. Also, an article in todaysnhra. (ive also head stock rods with arp bolts is fine) Jan 14, 2004 · 1. A factory 4bolt even with lots of reinforcement in my honest opinion as an engine builder and tuneer around 700 to 800 and thats NA. I take it someone doesnt know what a rotating assembly consist of. Authentication and pre-purchase inspection service still available. 6-6300 rpm limit. The top end is an Isky 270 Mega cam, mildly ported stock heads and a Performer RPM intake. Which converts it to a 4 bolt main cap and is way stronger than the factory 4 bolts. Feb 17, 2014 · C3 Tech/Performance - 2 bolt main 383 - anyone ever make a 383 out of a 350 2-bolt main engine???????? Jan 2, 2017 · I think a 2 bolt with studs will be fine. the crank is 3932442 casting number which comes up as a 350 cast crank. I'm told that a 2-bolt with a stud kit and cast crank are good up to 600 or more. hes got a used bryant light weight 3. How many rpm's will the stock rods hold. May 25, 2022 · A 2 bolt main 350 can handle a lot of horsepower. Dec 5, 2008 · Will a stock rod/crank 350 sbc motor hold up to 6500 rpm, time after time with 11:1 compression. Jul 25, 2013 · here is what i HAVE. 5 : 1, with a rev limit of 5500 or 6000 RPM? I'm contemplating boring 0. What determines what rpm a motor will turn safely? Aug 15, 2001 · C3 Tech/Performance - Max HP and TRQ for a 2 bolt main - How much HP and torque can a 2 bolt main from a 75 350 hold up to Dec 26, 2019 · I can't say for sure but I have read about some people running over 400 plus horsepower on a two bolt main and not even with studs and crank it over 6000 plus rpm and take it to the track many times and it held together fine. the bigger main bearing daimeter pushed the bolt pattern outboard, and put those 2 outer bolts drilled right into the weakest area of the main bulkhead/crankase, thus actually makng it weaker than a stock 2-bolt block. 035 area along with appropriate pistons for the stated compression with my Vortec top end. May 29, 2023 · A 2 bolt main 350 engine can handle up to 400-500 horsepower. The little guy still holds 80 psi oil pressure on cold starts, and levels off at 55-60 hot idle. How much horsepower can a 2 bolt main 350 handle? A 2 – bolt main with aftermarket studs is stronger than a 4- bolt main block, less prone to crack, and can take up to 600 HP on a seasoned block. I have forged crankshaft ,rod ,pistons and pro topline aluminum heads . what im doing is planning on getting a good forged set of pistons and possibly rods if needed. crank, rods, pistons, ect. Aug 7, 2007 · I have a sbc 350 thats been bored. Stock crank and rods. PM me for more information. 28 stroke crank that i sold him that is only 40#s. 2 bolt main converted to splayed 4 bolt caps? 4. Your making this question more complicated than it is. Nov 18, 2013 · Does anyone know what the hp limits for a stock 4 bolt BBC are? Would taking a 2 bolt block and drilling for splayed caps hold more is it a waste of time? May 22, 2008 · It's a 350 4 bolt main block, cast crank, original rods, hypereutectic pistons. going to be usine ARP main studs. On the valvetrain side, I don't really worry about float, I also don't expect going over 6500RPM. Flat tops, Comp xtreme energy cam, ported vortec heads with 1:6 roller rockers and better springs etc, single plane intake 2" super sucker spacer. My setup should be in the "high 600 hp range" NA (see signature) and has seen many 7000 rpm blasts along with quite a few 150-200hp shots of N2O Jul 31, 2023 · A 4 bolt main 350 can handle up to 600 horsepower. Dec 27, 2007 · Re: 2-bolt 350 block power limit 500 HP it will handle. How Much Horsepower Can A 2 Bolt Main 350 Handle? In this video, we dive into the performance capabilities of the 2 bolt main Chevy 350 engine. Understanding the limits of this engine type is Jun 1, 2010 · The 2-bolt main engine is capable of handling more power than the trans in the Fiero will handle reliably, so i wouldn't be worried about the engine, just with trying to keep power low enough to keep the driveline together. The small block Chevy can go beyond this by far, however reliability will suffer in the long run, especially in a stock shortblock. Jun 11, 2011 · If a stock 350 block can take this, a stock 454 block filled and splayed should take 1200hp. :thumbsup: Still looking for that elusive 76 Nova SS. i told him i've had a n2o engine Sep 21, 2007 · I know that the GM literature says 350 HP (which I find ridiculously low personally), but what do the experts here think one can take in a street strip setup? This is part number 10066034, standard 4" bore, 4 bolt grey iron main caps. All 2 bolt block are mark IV, gen 5 (91-95) 454 never had mech fuel pump boss some gen 6 (96-) 454 crate engines came with mech fuel pump. The 2 bolt main is the weakest of the various designs used on small block Chevy engines, so it is not recommended for applications where maximum power is needed. The main concern with increasing horsepower on a 2 bolt main 350 is theS integrity of the block. I'd like to swap to Jun 11, 2011 · Not sure on my hp but have done 10. I know its more than 1 HP per c. Oct 29, 2012 · How much HP can a stock rotating assembly handle. That is the general limits but there are exceptions to the rule. It has a 2 bolt main with an aftermarket stud kit, TRW forged flat tops, stock crank, stock rods with ARP bolts & polished beams. My 496 has been together for 12 years, 20k + miles. Mar 31, 2024 · Here’s a good question I’ve been wanting an answer to…what’s the most HP you can reliably make on a 2 bolt 350? Nov 6, 2002 · I was wondering how much horse power one could create on chevy 350 stroked to a 383 2 bolt mains before one would have problems. i. Should I use a 4 bolt main block? How much hp and rpm can a 2 bolt bbc handle? May 29, 2009 · Over the years I have had a couple of 2 bolt small blocks one being a 350, it made ~400-450 Hp revved to around 7k forged pistons & 1 pc valves. 4 bolt mains and a steel crank can handle 700hp and 7200 rpm. Chevy 350. I know there are some variables like balancing, etc Has anyone seen a block actually fail due to power alone (not a broken part, rod, crank, cam)? Feb 10, 2005 · Bowtie blocks with splayed 4-bolt mains with center studs should handle over 1,500 HP, and are good to well over 8500 RPM. I have seen 400hp on some 2 bolts. The stresses created on a Mar 28, 2008 · I got a budy who just got a 2 bolt 350 main block and is wanting to go turbo and was asking me on the max limits of the block if kept 2 bolt main. . I don't know if 150 or 250 HP extra is going to be a problem. Apr 5, 2004 · A 351W stock block is limited by the 1/2" main bolts and only being a 2 bolt main means the caps will start walking around 750-800hp if using high quality main studs. ARP bolts torqued right help as a safety net May 27, 2003 · (Except for my boat witch is a MSD 6M-2) I do so to keep my motors from reving past 5000 rpm's. also has stock rods. Other posts Josh Mitchell Drag Racing Parts Florida 7y · Public How much power can a 302 stock block handle before I start worrying. 70 chevelle on 91 pump gas . I want to build a low 11 sec. The main reason for this is the 2 bolt maincaps cannot handle as much torque as a 4 bolt main, so if you are planning on making a lot of horsepower, it is important to use quality Nov 20, 2006 · I want to build a 427 street/drag motor. Aug 17, 2022 · I've actually spun a high nickel 2 bolt 355 to 7200-7400 rpm shifts on a regular basis, and it survived. It did rev over 6000 rpm briefly, unloaded, the transmission flared between shifts. -Some blocks were a bit stronger than others, -Have the block sonic tested if in doubt. Nov 2, 2008 · You cant give a HP figure on it, You have to know the weight of the rods and pistons and RPM With lighter parts i feel you can push a little more HP and RPM The reason you go to 4 bolt is your trying to push the caps off the engine and this causes "cap walk" if the load is not enough or the cap material is not strong enough, solution? Jul 10, 2015 · I would sell the 4 bolt to a local hot rodder or store it and get a 2 bolt main older style block with large pad under the alternator (mid early 70s) and then add on a set of splayed bolt main caps this setup WILL handle 1000+. All mark IV 454 blocks have mech fuel pump (70-90). Jake Henry and 9 others 10 reactions · 175 comments Clint Scheuring BIG BLOCK CHEVY ENGINES & PARTS ONLY 5y · Public I'm running a 402 big block 2 bolt Main and I'm curious how much power or RPM will it handle if I balance it and run ARP bolts 0 reactions Aug 6, 2009 · ARP main bolts I have seen some over 600hp I wont push mine over 5500rpm or 450hp my 4bolt main in the barn however will get all forged internals with H-beam robs and spin 6200+rpm with a 200 or so shot of nitrous. Oct 1, 2009 · Can the 2 bolt SBC with a cast crank reliably handle around 425 HP with static compression of a MAX of 10. Mar 14, 2010 · I looked in the summit web site but they do not list any 4 bolt mains for the lt-1 or lt-4 unless you are suggesting i use 4 bolt mains for a gen 1 350 and not a gen 2. Oct 27, 2012 · Depends what your application is. Stock 2 bolt main? (bolts or studded) 2. That is the 460's limitation also being the small 1/2" main studs and also the same 750-800hp for the same reason. A local friend of my Dad's has built a couple of V8 Fiero's, both manual trans, one with a 350 and one with a 305. May 30, 2022 · A 2 bolt main small block Chevy (SBC) can handle up to about 500 horsepower before the block becomes susceptible to cracking. Aug 15, 2001 · C3 Tech/Performance - Max HP and TRQ for a 2 bolt main - How much HP and torque can a 2 bolt main from a 75 350 hold up to Dec 26, 2019 · I can't say for sure but I have read about some people running over 400 plus horsepower on a two bolt main and not even with studs and crank it over 6000 plus rpm and take it to the track many times and it held together fine. It all depends on how it is built and what components are used. Crank is Scat 4340, rods are 7/16" H beam, and pistons are -24cc blower pistons with Speedpro Hellfire rings. 3970010 small block chevy. The amount of horsepower a 2 bolt main 350 engine can handle depends on various factors like the condition of the engine, quality of parts installed, and type of fuel used. The motor is in a good shape ( less than 5000 miles on it). good engine though. You can get splayed main caps from numerous online sellers for your 2 bolt. da3b owonea tcihk jq 1wjy z54k 2s mhhpgf ie osza