SALTER EXPLAINS FUNDAMENTALS Carburetor vs EFI Having Fun with Students Subscribe Buy a Shirt

[@808sandacoustic]

It's so refreshing to witness the rarity of someone who actually understands static comp. And it's purpose.

[@w_oftruck5478]

Nice explanation for this specific part of the engine component

[@Jared45513]

Honestly the more videos I watch the more I like you man lol. The plug wire trick to blow the crap out of the jets is awesome, Id never herd that before. I love carbs, but I also geek out on the efi data and your on point on both. I learn new stuff every video.

[@dondotterer24]

Thanks Brian. Good classroom teaching.

[@thereluctantgearhead4544]

I do like some old Hilborn mechanical injection setups. The Crower stack injection is also badass. Enderle bird/buzzard catcher injection on a tunnelram or roots type blower is also the shit. Modern EFI "systems" is just another way for "them" to spy on you.

[@joeycornchopper8152]

Hey Brian, I want to take you back in the time capsule. You must remember the old predator carburetors.

[@SalterRacingEngines]

@@joeycornchopper8152 LOL yes the old fuel injection in a box

[@thereluctantgearhead4544]

The old Kendig variable venturi carb. Pretty good unit wide open. Had one on a 377ci Mini Rod pull tractor. Don't see them much these days.

[@thereluctantgearhead4544]

Bigfoot ran 3 of them on a 572ci blown Ford back in the early 80s. They were called Predators by then.

[@joeycornchopper8152]

@@SalterRacingEngines I wonder how they would compete with the new carburetors out there we’re talking old school now lol

[@hankclingingsmith8707]

They stopped making parts a few years after the original release. Killed a great carburetor​@@thereluctantgearhead4544

[@rubyr.4812]

Crossing the plug wires was worth the price of admission! 🤠

[@GrandPitoVic]

Great information. Brother!!!! Alot of people need to see this!!!

[@vrm86gt]

i like that crossed wire trick!

[@johnz8210]

That was cool. Maybe of interest to some is the Dodge/Mopar way of calculating air flow. They don't use a mass air flow sensor, but they can calculate the air flow pretty accurately. On some scan tools you will see a MAF data PID - but there is no MAF sensor.

[@apocolypse11]

Carb tune is adjusted by user efi adjust in real time while just driving. Effiency is king

[@bcbloc02]

Ideally if you are going to use a maf sensor you need the calibration table for it or to know some one with a flow bench that can calibrate it for you. If you take a maf out of a pipe and put it in a different diameter pipe the tune is destroyed.

[@shane-222]

There are systems without MAP or MAF. N-alpha uses TPS and RPM to calculate air mass, it’s common on motorcycles.

[@mwall1296]

You'll need to change O2 sensors WAY more often with race fuel....especially leaded fuels.

[@Shademax4273]

Many years ago i was gonna buy a sports car which seemed to run good on the test drive. Did a compression test and the needle never budged. I was puzzled. Thought maybe my tester was bad. Went str8 home and compression tested my car and the tester worked fine. Still puzzled to this day about that one. Didnt buy the car either.

[@robertmason8341]

Actually there is a type of modern efi that doesn’t reference map at all. When we refer to types of efi, as you mentioned speed density relying on the pressure in the manifold against speed of engine to calculate fueling requirements and mass airflow relying on an actual sensor in the plumbing pre-throttle valve to actually measure airflow to calculate fueling needs we are in both instances using those as the load input! But there is a more simple efi that although I can’t say if any cars use it, it’s on almost every motorcycle nowadays with the exception of Harley’s and I’ll explain why. This system is Alpha N, which simply uses the 2 dimensional mapping strategy of load is throttle position against rpm. It doesn’t use the map sensor as pressure in the intake of motorcycles isn’t good for measuring load. Motorcycles typically have ultra short runners and independent throttle bodies for each cylinder. They typically don’t share a throttle body for multiple cylinders therefore they have no shared plenum. Without going into depth for why MAP (sensor) based load is no good for ITBs suffice it to say it involves the drastic difference in air flow at very small throttle angle versus how after medium openings the airflow curve falls closer to a flatline (not drastic changes after say 40% tps….) Now Harley’s get away with speed density MAP based fueling as the two cylinders share a single TB and although small they do have a shared plenum although it’s wasn’t without quite a bit of work for Delco to figure out how to get fueling smooth and responsive and it should be noted they were the early adopters of drive by wire (with regards to motorcycles that is) .

[@SalterRacingEngines]

@@robertmason8341 yeah I know what you're saying but remember this is fundamental so you have to start somewhere

[@lt1nut]

Wanna learn us about Ford's variable venturi? Chrysler's Lean Spark? Vacuum controlled by solenoids and non-electric thingies so that different thingamabobs wouldn't work at the right time? Bosch Jetronic, maybe? How many accessories need to be removed to replace a BOP water pump? Ahhhhh, the "growing pains"....

[@user-ug2rn7sr9i]

I won't even work on newer stuff anymore. Someone else can pull intake to do starter. And just got worse.

[@lt1nut]

@@user-ug2rn7sr9i Working flat-rate has it's pro's and cons, dealership or not. I've been out of the game for a few decades....

[@Hillbillygarage1215]

Oil temp sensor, does it play a significant role in PCM tuning? Or is it more for VVT control? Or is it really insignificant? Brother, this is actually one of your best, I am really enjoying being in your "classroom" and learning more about engines.

[@Shademax4273]

Once heard someone say there is no such thing as boost or vacuum. Only differential pressure.

[@cameronjohnston5748]

Ahh yes modern technology, you said about when granny goes out and presses the button, doesn't seem that long ago and it was a crankhandle. Wonder what the next hundred years will do for granny?

[@markmcmullen1371]

👍👍👍

[@jeffwilliams8277]

It needs the facts. Fuel Air Compression Timing Spark

[@stukksmith122]

I really enjoyed that. Good accurate info sure to pass it on to my Son.

[@user-ug2rn7sr9i]

🏁🏁🏁

[@thereluctantgearhead4544]

I like 4500 Dominator Holleys & badass double pumpers. Those trendy young bucks can have their EFI conversions. Ill pass. I like being a dinosaur.

[@thirty2toone]

Nothin beats a properly tuned Holley DP

[@chevyrc3623]

This is definitely very cool detail explanation of efi

[@heathrobertbowden4925]

Understanding efi was slightly intense . I got the message though .

[@Dwlukinbill]

Sorry class I had to ask. Can I charge my car battery with the o2 sensors, if my alternator/ generator goes out or if did want run one? 😄

[@gordonborsboom7460]

It produces one volt. You are 12 volts short

[@Dwlukinbill]

@ thought Brain said 9v 😁 plus if you had multiple.

[@SalterRacingEngines]

@@Dwlukinbill LOL

[@Dwlukinbill]

@@SalterRacingEngines .9v I was wrong I will need 20 of them

[@Dwlukinbill]

@@gordonborsboom7460 Plus running like solar panels or connecting two 12v batteries too get 24v Possibilities

[@BruceDuckhart]

Is that one of your new shirts?

[@SalterRacingEngines]

@@BruceDuckhart no that says I still play with blocks you can buy that online

[@MichaelScudder72]

185HP !

[@thereluctantgearhead4544]

They can do Alot better than that with the proper changes, mine did. Blame the EPA for that 185hp/300tq 403. Totally cut the balls off them. Heads, intake, pistons, cam & a good valve train makes a hell of a difference. I used milled 455 heads & KB 4.375 flattop pistons with 6cc valve reliefs. Came in around 10.5-1 compression. Ran mid 11s NA in a gutted G-body Cutlass.

[@MichaelScudder72]

@@thereluctantgearhead4544 I've owned several 403 Trans Ams. I never did anything to them but with that 4.351" bore they had potential

[@edpetrocelli2633]

Why can`t efi run in open loop all the time instead of switching to closed loop at some predetermined temperature, the engines seem to be stronger when they`re cold. I have a feeling emissions has something to do with it.

[@SalterRacingEngines]

@@edpetrocelli2633 exactly that's why

[@MichaelScudder72]

Old school knowledge. Cross the wires. Awesome

[@rolandotillit2867]

@11:00 in electrical engineering it's called a transient, same as in aerodynamics. EFI is a bandaid way to avoid these transients. A lot of tip-in tuning on the EFI side involves empirically injecting fuel and ignition around those transients. That's what separates good tuners from average ones in the EFI world. You don't have to deal with this with carbs, but as you said you experience those transients that cut the signal to the carb from the intake. Tuning that with a carb is doable, and again separates the good from the mediocre, EFI just let's you do that, and set it and forget it. Modern computers compensate for all sorts of things, the same thing someone who knows their way around a carbureted engine would, but with robotic precision. Just because something is precise doesn't mean it's right though, you can be precisely wrong.

[@lt1nut]

A venturi is a beautiful thing.

[@rolandotillit2867]

@@lt1nut Right on!

[@bigboreracing356]

4th😎

[@autonomous_collective]

🏁🏁🏁

[@patrickwendling6759]

Thank you for your knowledge and videos TRUMP USA MAGA