Gen 5 with a carb........
Gen 5 with a carb........ I am ONLY CURIOUS if anyone has had any luck getting a leg up on building one with a carb??
I am looking at getting a 2018 5.3 block for a 427 build. Have it sleeved and install a rotating assembly.
Cam will probably be the biggest problem because of the DI on the heads and intake.
I figure I am more or less pissing in the wind for now. Unless someone can point me in the right direction.
I am looking at getting a 2018 5.3 block for a 427 build. Have it sleeved and install a rotating assembly.
Cam will probably be the biggest problem because of the DI on the heads and intake.
I figure I am more or less pissing in the wind for now. Unless someone can point me in the right direction.
I believe there are DI injector plugs that you can buy online, and the Gen5 motors have the same 58x/4x crank/cam signals, so you could use one of the carb boxes to control spark. Then get a carb intake, and you should be in business. Or if you cannot find a carb intake for Gen5, they make adapters that allow you to install an LS3 intake onto Gen5 motors. You would also need to figure out a way to plug the DI fuel pump on the block.
In a swap or conversion, I'm still not convinced that a Gen5 motor really is an upgrade over a Gen4 motor. I think more aftermarket support needs to be out there for controlling the DI and VVT before it will be more of a benefit.
In a swap or conversion, I'm still not convinced that a Gen5 motor really is an upgrade over a Gen4 motor. I think more aftermarket support needs to be out there for controlling the DI and VVT before it will be more of a benefit.
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There is a major gain in bottom end torque with Gen v vs. Gen IV. in fairly stock trim. Richard Holdener has videos showcasing this. Not many reviews/dyno data with Gen V intakes though.
a Gen V L83 will give a run to a LS3
a Gen V L83 will give a run to a LS3
I am gathering information right now as I have not decided what direction I will be going.
Majority of the gain is compression and direct injection, both negated when building a bottom end with a carb. The L83 has 11:1 compression, that's where it makes gains over the lower compression Gen 4 5.3L, if you drop pistons into a Gen 4 to make it 11:1 you get pretty much the same power. Either way an 5.3L L83 rated at 355hp/383tq doing anything to an LS3 rated at 430hp/424tq is a pipe dream, being down 75hp is noticeable!
Well, the build will start as a block only anyways. That way I can pick the heads I want to use after the short block is all done being sleeved and built.
I haven’t messed with anything Gen 5 yet. And may not because of the cost. May just say screw it and get a gen 6 454 and build one of those with a solid roller cam.
I haven’t messed with anything Gen 5 yet. And may not because of the cost. May just say screw it and get a gen 6 454 and build one of those with a solid roller cam.
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Stay away from those Gen 5, 6 or 7 BBC. They have little aftermarket support, and many parts are not interchangeable with the Mark IV BBC's. If you are just looking for a big cube motor, look at Texas Speed's sleeved Gen4 blocks. You can even buy a complete short block 427 LS from them. Slap on a carb and away you go.
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Verdad Gallardo Or you can look at the LS570 crate motor that came out recently
https://www.chevrolet.com/performanc...s/ls/ls427-570
https://www.chevrolet.com/performanc...s/ls/ls427-570
*Edit: I guess hypothetically if you were going to sleeve an L33 and build a 427 and then sleeve an L83 and build a 427 and use the stock heads on both, the L83 heads are likely better....if for some reason you were going to sleeve a block, buy a stroker kit, and then use the stock cylinder heads.
If you really for some reason want a carb, which doesn't make a lot of sense when there is completely self learning efi that can be setup with a basic handheld, then you're better off with an earlier LS where you don't have to work backward against DI.
My current block is a Gen 3 5.3 that is bored to 5.7 specs. I can stroke it to 383.
My second current block is a 351 Cleveland that had to have a sleeve put in it.
It will hopefully be ready for me to get Saturday providing I get the deposit I am expecting.
I expect to be picking that up along with the crankshaft for it.
