LS Crank N B16 4 Boost??
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LS Crank N B16 4 Boost??
When runnin the LS crank inside of a vtec block what are the correct build procedures. I know that the LS crank has a longer stroke which ultimately means longer/taller rods. How does that workout inside of a block like the GSR or for that matter even a B16?? I've heard something about heating the oil squirters up and bend'em back to provide the correct clearance. I've also heard of bend'em and plugging'em for more oil pressure. Did you guys use either one of these methods in your build? Also wouldn't you need custom rods to support the longer stroke?
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Re: LS Crank N B16 4 Boost??
The B16 deck height is less than b18 and b20. I dont think you are going to be able to fit the 137mm rod in the b16 block with ls crank, the b18's have longer rods and bigger stroke than b16, along with a "taller" block to fit the rotating assembly in..
But if you have no other choice, then you could use b16 (134mm) rod, with hayabusa bike pistons - they are much "shorter" than the b series pistons and will fit within the block height and are also 81mm in diameter.
I know of a few people who used this type of geometry with boost - Very good torque characteristics, but you will have to be very wise on the rev limit..
Ls crank in b16 block would drastically reduce r/s ratio - lower than the ls/crvtec's 1.54:1
With regards to the oil squirters... not tooo sure what needs to be done exactly..
But I think with the new rod angle with Ls crank, it might be in the way, not tooo sure - may even have the notch the bottom of the block..?
But if you have no other choice, then you could use b16 (134mm) rod, with hayabusa bike pistons - they are much "shorter" than the b series pistons and will fit within the block height and are also 81mm in diameter.
I know of a few people who used this type of geometry with boost - Very good torque characteristics, but you will have to be very wise on the rev limit..
Ls crank in b16 block would drastically reduce r/s ratio - lower than the ls/crvtec's 1.54:1
With regards to the oil squirters... not tooo sure what needs to be done exactly..
But I think with the new rod angle with Ls crank, it might be in the way, not tooo sure - may even have the notch the bottom of the block..?
Last edited by C2K_TB_TEC; 10-30-2009 at 01:40 PM.
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Re: LS Crank N B16 4 Boost??
Thanx...Anyone else...Need more info on this build...I've just heard from one too many sources that the proper way to perform LS/VTEC is to actually run the LS crank inside the VTEC block...in terms of being conservative on the rev limit...I thought this was the reason to put the LS crank inside the VTEC block to take advantage of not only the torque but also the oil squirters or if you plug them then you take advantage of the extra much needed oil pressure to keep that baby healthy at high rpm...?
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Re: LS Crank N B16 4 Boost??
Thanx fellas...I'd really like to run this setup in the b16 block I have...Anybody else with knowledge on this particular setup?
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Re: LS Crank N B16 4 Boost??
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Re: LS Crank N B16 4 Boost??
Come to find out I don't even have the b16 block anymore. I still have a GSR block. Does anyone know what it'll take to run the LS crank in that block?
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Re: LS Crank N B16 4 Boost??
"But if you have no other choice, then you could use b16 (134mm) rod, with hayabusa bike pistons - they are much "shorter" than the b series pistons and will fit within the block height and are also 81mm in diameter."
very interesting, do you know about what the average rev limit is for that setup? and arent the hayabusa pistons forged too?
to answer the op's question i remember quite awile ago there where these special pistons called "tech43" that a member on the board got JE or someone to make that allowed basically LS internals in a b16 block
very interesting, do you know about what the average rev limit is for that setup? and arent the hayabusa pistons forged too?
to answer the op's question i remember quite awile ago there where these special pistons called "tech43" that a member on the board got JE or someone to make that allowed basically LS internals in a b16 block
Last edited by TheCheeseWedge; 11-09-2009 at 04:46 PM.
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Re: LS Crank N B16 4 Boost??
the LS crank will fit into the B16B and B18 series blocks, however, especially if you're using forged pistons, it is recommend to block off the oil squirters. On some piston skirt designs, they will knock against the squirters even if bent. The squirters are mainly used to protect cast pistons. "Revving" is limited on the balancing of the motor. there are plenty of LS/VTEC and B20/VTEC that rev to 9000rpms, with no ill-effects as long as the assembly is properly balanced by a machine shop.
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Re: LS Crank N B16 4 Boost??
When you say the B18 block are you referring to the B18c1 because I have a GSR block. Secondly is that guy right ^ when he says that all I need is LS rods in the GSR block...I thought that the GSR block has a shorter deck height...wouldn't that make it virtually impossible to run longer rods and a bigger crank? Third if you block off the oil squirters in a GSR block which means that they're not going to be cooling the pistons and if revving to 9,000 rpms is dependent on the balancing of the motor done by the machine shop. Then basically there's no point rather advantage of running the LS crank in the GSR block or is it to take advantage of the GSR's r/s ratio when using the LS crank inside that block????
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Re: LS Crank N B16 4 Boost??
What is your application for? track, drag, autox, what? The squirters are more necessary for tracking or road racing. Autox and drag are short times and aren't as dependent on oil for cooling purposes.
I had once thought about putting in a larger crank in a B16a for more torque. I would guess that a custom rod would have to be made or a weird piston.
I had once thought about putting in a larger crank in a B16a for more torque. I would guess that a custom rod would have to be made or a weird piston.
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Re: LS Crank N B16 4 Boost??
My application is for the street, daily driver and I'd like to be able to road course the car every once and a blue...But more so this is the motor I want for daily driver...Like as if I brought an Si or GSR or Type R for every day use...So I guess longevity is the word...Just one of those motors with a little more under the hood. I'd love to catch some of those Si GSR Type R guys and walk'em...So maybe even a sleeper
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Re: LS Crank N B16 4 Boost??
My NA build with this setup is here: https://honda-tech.com/forums/all-motor-naturally-aspirated-44/project-em1-shodan-goes-na-2458563/#post36812684
Hope this helps.
Last edited by TheShodan; 11-10-2009 at 12:54 PM.
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