K&N electronic carb injection

Interesting system to control air/fuel ratio using LS injector(s)  in addition to traditional carb with injector plate between carb and intake.

https://www.youtube.com/watch?v=zncwgq6wRsA&feature=youtu.be

https://www.knfilters.com/eci

This is jogging my memory. I feel like we had a thread about a similar system years back and i poo pood it. I would say it is not much cheaper than a total replacement TBI system which will have much greater capabilities. What they're talking about doesn't sound all that much different from putting a fancy controller on a nitrous plate and only hooking up the fuel solenoid. Go a little bit further and the possibilities open up quite a bit. 

Why would go through all of this trouble and run the fuel line and the pressure and not go full EFI for like 500$ more. with an off the shelf kit. Would be insane for programmable NOS though on carbs cars.

wearymicrobe said:

Why would go through all of this trouble and run the fuel line and the pressure and not go full EFI for like 500$ more. with an off the shelf kit. Would be insane for programmable NOS though on carbs cars.

They just put a T in the stock fuel line and used the stock mechanical pump with only like 5 PSI in the video.

They just put a T in the stock fuel line and used the stock mechanical pump with only like 5 PSI in the video.

Then when they're asked about the actual capacity of the system to inject fuel, they pretend they don't know. I'm sure it's enough to fix a lean spot on an otherwise-working carburetor, but i doubt it's enough to add useful power potential. Or, if it were possible to run hundreds of HP worth of fuel through a port fuel injector at 5psi, im sure one of the aftermarket TBI systems would be selling on that, on not having to upgrade your fuel system.  

I didn't hear any claims that it was a power adder. Sounds more like it's for cold starts and a safety to prevent running lean and help optimize air/fuel ratio. They're not claiming it's better than EFI or a replacement for EFI, just an accessory for a carb.

They didn't mention anything in the video about the possibility of using a high pressure fuel pump. I wondered how good the atomization would be at idle ( low air speed) during cold starts running an injector designed to run with 55-58 ? lbs of pressure when only using 5 lbs of pressure.  Would fuel be essentially dripping or peeing onto the floor of the intake plenum? Could a higher pressure pump be used? Would it function better? If using a higher pressure pump with dedicated line could it then possibly be able to make a little more peak power when the carb is set up for best performance in the middle of the curve?

Would this be an easier way for tuning for weather conditions? Say the average bracket racer, not some 9 second beast but an 11-13 second car. Rather than having a weather station, recording data at every event, reading plugs at each event, changing jets, etc. Just set the carb up on a hot humid day then let the K&N thing take over on days the air is better?

We've done a few tests at work with firing injectors into the intake plenum downstream of the throttle, and the fuel distribution has ranged from horrible to abysmal, even when the injectors were fed with a fuel pressure within their design specifications.

All the downfalls of a carb + all the downfalls of some hokey system = a car that wont run right. 

I look at this and think "This is for someone who can't set up a carburetor and is afraid of EFI"

I just don't see the point of it.

It is not only a solution looking for a problem, it is a problem in its own right.

wearymicrobe said:

Why would go through all of this trouble and run the fuel line and the pressure and not go full EFI for like 500$ more.

FITECH'S EASY STREET SYSTEM is only $300 more. Personally I'd just take some time to fine tune my carb and get it dialed in and working well or switch to any of the aftermarket TBI before I'd consider running K&N's goofy system

In reply to edizzle89 :

Why not just throw a micro squirt set up at it and be done?

This is basically just and old Sds fic rebranded for carb use from what I can tell.