Anyone running a carbureted LS motor?

[Nick_c10]

I hate the look of the LS intakes and fuel rails but I do like the distributor-less design of the LS ignition so I am thinking of putting in a carbureted LS motor. Hope this doesn't sound like a dumb question but if I put a carb on an LS motor with the MSD LS ignition coil kit do I still need the factory computer and harness or does the MSD kit replace that? I understand I will need a standalone controller if I use a 4l60E for a transmission. I know I am going to get some negative feedback on this so here we go!

[mongocanfly]

Don't like the LS look?....read dayj1's build.....http://67-72chevytrucks.com/vboard/s...ght=Skin+a+cat

[Nick_c10]

Really nice build. I'm trying to keep it as simple as possible as far as wiring goes, just wondering if ill still need the ECM with a carbed setup.

[sweetk30]

need a spark controler box at min for the fact there i no dist setup .

[homemade87]

No hate here . I have both fi and carb and like both .Both are built for performance . The carb engine is in a 67 camaro and fi is in my 82 c10 . The carb engine is a little monster with a 4 speed .

So nothing wrong with a carbed LS engine in my book . As for controller I use the MSD 6010 for the 24 crank reluctor wheel . It comes with the harness you need to plug into your existing sensors . There are some newer versions with the option on reluctor . There is also some other company's that make systems also . Just be sure to get the right one for your reluctor .

So in the end to answer your question , you do not need any part of the oem harness or computer . As you already stated you will need a controller for the trans if automatic .

[davepl]

There is NOTHING about a carb that would EVER make me want one when good, calibrated EFI is available. Point being once the air cleaner is on, there's not much difference.

[mongocanfly]

I agree...putting a carb in place of injection defeats all the benefits of having a LS....if i wanted a carb I'd just keep a SB....

[homemade87]

Big difference in power and torque between a sbc and ls even when carbed . Dont get me wrong , I like the efi as well . Its just another avenue with the ls motors .

[davepl]

Originally Posted by homemade87

Big difference in power and torque between a sbc and ls even when carbed . Dont get me wrong , I like the efi as well . Its just another avenue with the ls motors .

Due to the latent heat of vaporization a carb'd motor can make like 2% more power at max output. The cooling of evaporating gas does it, which helps air density. The EFI fuel doesn't boil until in the cylinder, but conversely that reduces the chance of detonation.

2%, or even 5%, at wide open peak output only should matter only to heads-up drag racing, really...

If you want a carb, get a carb, none of my business. I just want to disabuse anyone from the notion that the car will be faster, better, stronger, or really in any way improved by a carb over EFI.

[homemade87]

Originally Posted by homemade87

Big difference in power and torque between a sbc and ls even when carbed . Dont get me wrong , I like the efi as well . Its just another avenue with the ls motors .

Originally Posted by davepl

Due to the latent heat of vaporization a carb'd motor can make like 2% more power at max output. The cooling of evaporating gas does it, which helps air density. The EFI fuel doesn't boil until in the cylinder, but conversely that reduces the chance of detonation.

2%, or even 5%, at wide open peak output only should matter only to heads-up drag racing, really...

If you want a carb, get a carb, none of my business. I just want to disabuse anyone from the notion that the car will be faster, better, stronger, or really in any way improved by a carb over EFI.

If you will read my statement again it is not comparing efi to carb . It is comparing small block chevy carbed to ls carbed . There is a lot of difference between the two in stock form even when carbed .

In no way I was saying carb was going to make more power over efi .

[Nick_c10]

thanks for the info guys.