4.8L Crank + 6.2L Block = 1.889 HP Per Cubic Inch 349 LS (extended cut)
Рет қаралды 4,036
Жыл бұрынCE Performance Crate Engines combined the 400 SBC and 327 SBC type bore and stroke combination, after what was learned with our 354 cu.in. SBC (327 crank in a 400 block), and created an engine, a 349 cu.in. LS with a 6.2L block, bored to 4.125", and a 4.8L 3.267" stroke crankshaft, that produced 1.889 horsepower per cubic inch - an awesome accomplishment! From original video: • 4.8L Crank + 6.2L Bloc...
In addition to the original 349 LS dyno video, Steven Shumey of CE Performance Crate Engines discusses some 349 cu.in. LS crate engine details! Please comment and/or ask any questions. Thank you for your support!
This build included:
- GM 6.2L aluminum block bored to 4.125"
- GM (stock) 4.8L 3.267" stroke crankshaft
- Eagle 6.3" H-beam connecting rods
- AFR LS3 260cc rectangular port cylinder heads
- Edelbrock Super Victor LS3 intake manifold
- Solid roller cam
- 12:1 compression ratio, runs on pump gas
Cam specs: The camshaft is one we got Comp Cams to make for us. We picked 2 lobes we liked and had them put them at 113 LSA. The lobe numbers are 12677R on the intake and 12686R on the exhaust. The specs are 249/267 @ .050 of duration and .675/.675 lift and .016” lash. The lobes are a hybrid design and can be used on either hydraulic or solid rollers. This 349 LS has solid lifters.
Previous 349 LS videos:
The 349 LS road tested in a 1971 Chevy Nova: www.youtube.com/watch?v=JrGCA...
Two engines: www.youtube.com/watch?v=4Esp8...
327 Crank in a 400 Block ("The 350 that Chevy should have built") playlist:
kzfaq.info?list...
A huge thank you to Kyle and Jim of Richmond Engines!
@mikef-gi2dg Жыл бұрын
Omg.....how am I going to continue to be a lover of the gen 1 stuff you do when you come up with crazy stuff like this. I hate LS stuff now I want some. I AM SO CONFUSED. That combo sounds awesome my 75 Monza would love something like that, so would my 68 Impala, or my 78 Malibu, or 79 Monza, or 88 s1o- blazer. I am going to need more cars to try these out old and new...OH MY!
@ceperformance Жыл бұрын
Ooops, sorry to mess with you Mike f. As you can tell, we’re just adapting old methods into the new generation :) Thanks for commenting!
@mikef-gi2dg Жыл бұрын
@@ceperformance You guys are making crazy power with small old school stuff, crazy mad power with small LS stuff. Next you will be having cats and dogs, Chevy's and Fords ( no Dodges) living in harmony It's like SHARKNATO for car nuts. It's upside down performance world.
@DeathTollRacing Жыл бұрын
Love this one again. Quit teasing me with all this destroked stuff. My next project up is a 302 sbc which I have been talking about for years, and it’s finally getting put together. Keep it up!!
@ceperformance Жыл бұрын
Hey thanks man! I hope your project is a complete success :) Thanks for your remarks!
@Mike44460 Жыл бұрын
302 with an LS?
@DeathTollRacing Жыл бұрын
@@Mike44460 no. It’s an old school small block, aluminum heads, solid roller cam, etc. all aftermarket other than the block.
@Mike44460 Жыл бұрын
@@DeathTollRacing Far out, had the real DZ in 1969 with a 4.88 gear. The prefect red light bandit.
@DeathTollRacing Жыл бұрын
@@Mike44460 I bet! They scream
@mohanperformance.enginerd.1308 Жыл бұрын
The engine is excellent. The video presentation is also excellent. Steve is a scholar. The LS platform is exciting! Still lots of new ideas and combinations to be discoverd yet. It would be fun to see a group of top local engine guys from around the lower mainland get sponsored, team up and take a shot at the engine masters challenge. Or some kinda challenge for fun. But it would require a induction expert, a engine dyno expert, a large engine rebuilding fascillity with top guys and dynamic thinkers to all come together and share the task. I predict Canada would put up a very good fight in a deal like that. Maybe we could win a free jug of amsoil. 😉
@ceperformance Жыл бұрын
I totally agree!! Thank you sir for your kind remarks :)
@craigcampbell8560 Жыл бұрын
I'll never understand why anyone would want to build a stroker for performance if you can achieve roughly the same displacement with a destroke because the destroke will almost always perform better. You guys built a 400 block with a 283 crank (always wanted to build one but haven't has the opportunity) which is VERY impressive. I've always wanted to put a 348 crankshaft into a 502 block to see what would happen when you pushed a big block Chevy to be as far over square as possible with a GM produced block and crankshaft. I'm guessing it would be a beast! Keep up the great work guys!
@ceperformance Жыл бұрын
Hey thanks for the great comments! I’m happy to hear that others out there have similar thoughts as we have.
@dennisadamo5209 Жыл бұрын
Another great build and video love the destroker stuff, actually emailed you looking for info on your 283 crank 400 sbc and you where very helpful. Keep up the great work and builds!
@ceperformance Жыл бұрын
Hey Dennis! Thank you very much :) I appreciate your comments!
@mchristr Жыл бұрын
We think alike. Big bore (unshrouded valves), small stroke, and enough compression to make good things happen. The key is to nail the cam timing.
@ceperformance Жыл бұрын
This build was so fun, I want to build another one! Thoughts start with an LSX Tall Deck. Bigger bore and longer rods and tighter LSA. 361 cid. I’d love to see 2 HP/ cube.
@steamstate823 Жыл бұрын
Okay you said pump gas where do I find 94 octane pump gas?
@ceperformance Жыл бұрын
Hey, thanks for asking. Here in British Columbia Canada, every Chevron gas station has 94 octane. Pretty sweet :)
@MPbdy Жыл бұрын
How do you take an aluminum 6.2 to 4.125 bore? Stock sleeves, or did you sleeve the block?
@ceperformance Жыл бұрын
Thanks for asking. The 6.2 factory bore is 4.065” so it’s only .060” over. There’s still lots of sleeve left plus a bunch of aluminum supporting the sleeves. Nothing fancy :)
@troylambert5140 4 ай бұрын
@@ceperformancewould that combination be strong enough for boost? Seems like the factory sleeves would be pretty thin at that point just a basic question
@ceperformance 3 ай бұрын
I never planned on boost but it would be interesting to try :) I believe it would survive. This would need dished pistons before I’d ever attempt that on this combo. Thanks for commenting.
@knucklestheechidna5718 Жыл бұрын
Holy moly Im just learning these LS series in the last few days I've always been more of an import guy but I'm looking at building an FC rx7 but with how much the the price went up on all the good Japanese motors like the 1/2jz, the 13b went up in price not just on motors but the parts for them, an LS swap just makes so much more sense. N/a no turbo system to worry about, can still build a high revving motor for a reasonable cost with absurd power levels for a 2500lb car. I guarantee if I built a 5-600hp rotary I would end up rebuilding it over and over spending thousands each time. Now that I know I don't have to blow 2,700 on an LS3 block I can just use a caddy block it saves me a couple grand at least too!
@ceperformance Жыл бұрын
Absolutely! These 6.2 blocks are definitely tough enough for N/A even making 600+ HP.
@rifleman7313 Жыл бұрын
Great job, I like forced induction/tubocharing to regain some of the power loss compared to the standard 6.2 LS as well as further increase engine efficiency. So the engine would match or exceed the power of a standard 6.2 LS but have higher rpm capabilities. Probably a very obvious question but would using a Howard's camshaft, or a Summit Torqinator camshaft be suitable for an engine build like this? Or would the choppy sound just be lost once higher rpms are reached (I honestly don't know).
@ceperformance Жыл бұрын
Thanks for commenting. Camshaft choice is very important to get right. There’s a lot of bad ideas out there for sure. Choppy isn’t always the best. I like stuff that sounds nice but performs the best in the application.
@rifleman7313 Жыл бұрын
@@ceperformance Thanks
@itseithergonnaworkoritaint7852 Жыл бұрын
Hey, when are yous guys going to install Ford a 302 or a 289 crank in a 4.125" bore after market sbf block? Unfortunately the newer Ford engine platforms aren't a good match for these kind of configurations. Or what about a .060" over MOPAR 340 block with a 277/301 crank that has a 3.125" stroke? Or a .060" over 6.4L Hemi with a 318 crank in it? Same bore spacing but different bearing size.318 mains are 2.500" while the Hemis are 2.559" so if they make .060" undersize bearings you could use a standard 318 crank? Not sure though because of how narrow the Hemi con rods are, the older crank might be to wide in between the Hemi block's mains?
@ceperformance Жыл бұрын
Those are some interesting ideas :) I think the SBF is definitely a future project. Just need a customer to get on board and pay for it!! Thanks for commenting :)
@rafaellastracom6411 Жыл бұрын
Wow! Who needs DOHC´s anyway. Awesome build!
@ceperformance Жыл бұрын
Hahahaha. Thanks for commenting!
@Roddy_Zeh Жыл бұрын
Talk about a mad build!! 👏 Now I'm here wishing GM made an LS version with an even shorter stroke than the 4.8, maybe the same as the old 283...or at least that they kept producing and improving the 4.8, instead of phasing them out in 2007. And while I love the LS for its flexibility of recipes, I sure hope to see these recipes being brought to the LT family too!
@ceperformance Жыл бұрын
Hey thanks for commenting! It would be cool to build a 3” stroke LS for sure. I remember when Nelson Racing Engines did a one-off race boat twin turbo LS with a 3” stroke. Maybe it was actually shorter than that? There’s a great video of it on a Dyno at WOT for something like 5 minutes! It’s hilarious. I’ll look for a link.
@ceperformance Жыл бұрын
Here it is… kzfaq.info/get/bejne/gpeAYMiStq7PiJc.html
@Roddy_Zeh Жыл бұрын
@@ceperformance Uncle Nelson! I've followed his builds for years! How come that one escaped I don't know, but I'm glad for that video, hehe! 260 cubic inches, that surely seems a big deal! To think it's just a bit larger than the 250-ci 4.1L inline-6's so popular here... Considering that crank is possibly custom-built, I do believe it could even be shorter than that. With the engine operating at max rpm for long periods, having a piston speed as low as possible is the ideal. Thanks a lot! 👍
@ceperformance Жыл бұрын
Your welcome! I think it’s great too :)
@jimharden4823 Жыл бұрын
What about a 6.2 block with a 4.8 crank and 5.3 heads for a stock Silverado
@ceperformance Жыл бұрын
That’s the ticket! I bet that would be a great truck engine :)
@cartermackenzie1135 2 ай бұрын
What brand lifters are yall running ?
@ceperformance 2 ай бұрын
Hey there. On this build I used Johnson Top-Line lifters. They are listed for a 350 Roller cam engine and are solid roller, not hydraulic. Part number is B2992.
@cartermackenzie1135 2 ай бұрын
@@ceperformance does any machining need to be done to make 350 lifters work on an LS ?
@ceperformance 2 ай бұрын
@cartermackenzie1135 No they fit right in. Thank you GM!
@cartermackenzie1135 2 ай бұрын
@ceperformance that's awesome, I've seen the options labeled for LS motors and have always wondered why they are so much more expensive than other platforms. I'll definitely go solid for my build. How is the maintenance on them? Would you consider this motor daily driveable?
@ceperformance 2 ай бұрын
Reliability is important to me and I have no issue with solid lifters for daily drivers. Set the lash very accurately and it will last a very long time without maintenance. Use good adjustable rockers!
@tenthousanddays2103 Жыл бұрын
660 HP should propel a 3500lb car to over 130 mph in the 1/4 mile.
@ceperformance Жыл бұрын
With okay traction, what ET should be attainable?
@tenthousanddays2103 Жыл бұрын
@@ceperformance My 66 Chevelle 396/375 Super Stocker made 660 and went 9.77@135 @3540# Sub optimal traction and gearing won't provide the ET but MPH should be close. Example: My 70 Chevelle with the wrong convertor and not enough gear went 12.08@118 @3750. Sorted out, that 118mph should be 11.20 / 11.30 et but would still be within a couple of mph of that 118mph.
@ceperformance Жыл бұрын
Thank you. I wonder where that ‘66 is today?
@tenthousanddays2103 Жыл бұрын
@@ceperformance I sold it to a guy in Harnosan Sweden.
@ceperformance Жыл бұрын
It sure would be cool to see it again! I have a large picture framed of it on my shop wall back when we put my 327 in it for the weekend. Front wheels a foot off the ground at Mission Raceway :)
@itseithergonnaworkoritaint7852 Жыл бұрын
What are the cam specs on this one? That's wild, almost 200 more HP than what the torque maxed out at! Those big heads are what's reducing the torque but the upper HP sure likes it! 4.56 plus six speed in a light Nova sounds like that car is going to be a hoot and a half with 659.4 HP on tap to drive! Reducing the piston speed has to be helpful in these combos as well by freeing up some horseys to spin the engine. Combine that with the shorter stroke that the explosion pushes down further than an engine that would have an longer stroke and with the longer rod ratio to let it run on pump gas makes these really attractive little power houses. And quit making your videos private! LOL JK, they're your videos do what you want with them, I'll get over it.😎
@ceperformance Жыл бұрын
Hey, thank you for commenting!
@ceperformance Жыл бұрын
The camshaft is one we got Comp Cams to make for us. We picked 2 lobes we liked and had them put them at 113 LSA. The lobe numbers are 12677R on the intake and 12686R on the exhaust. The specs are 249/267 @ .050 of duration and .675/.675 lift and .016” lash. The lobes are a hybrid design and can be used on either hydraulic or solid rollers. We’re using solids. Thanks for your comments! If you’re wondering why we took the last video down and reposted it was to make a correction :)
@rs3672 Жыл бұрын
@@ceperformance That cam has 32 deg of overlap but idle seems smooth and not choppy?
@ceperformance Жыл бұрын
Thanks for commenting. I’m very happy with the idle quality and it is impressive at how well she runs. I’m a fan of wider lobe separation and this one I did with 113 degrees of LSA. Some people think it’s silly and I’m sacrificing power but I love it!
@Scubasteve22 Жыл бұрын
Thats really good power! I doubt there is a 350 ci engine out there that is even close to that. I know those afr LS3 ' s work good, but man thats crazy. Thx for sharing
@ceperformance Жыл бұрын
Hey, thank you for commenting! It’s a really fun little motor. Sounds amazing and love to pull. In a 6 speed stick car, what a hoot!
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