Running a V8 with a Lawn Mower Carby.

[lmoengnr]

His channel focus on how engines are way over carbed. Browse some of his other stuff and he explains.

I'm talking fuel flow...
I've had lots of small engine carbies apart, fuel passages, jet sizes and float bowl displacement are way too small...

One stab of the throttle will empty the float chamber, and the passages and jet sizes just wouldn't cope...

 

[Fu Manchu]

He made a gadget to control fuel flow.

 

[Immortality]

He proved it worked, is it practical for a daily driver? NO, well maybe if you live out in the middle of no-where and you aren't going to hold anyone up and you only ever travel alone in your car etc. But around town with no power and no revs under load people are going to be hating you fast.

 

[07GTS]

it still takes the same amount of torque to move the vehicle at what ever speed so if carby is large or small that torque dosnt change so then neither would the AFR so its prob the exact same it would be with the standard carby just uses more overall because it can be opened further, if u can measure the flow of the mower carby and then limit the standard to the same flow u would get the same outcome

 

[lmoengnr]

He made a gadget to control fuel flow.

A hidden set of injectors?

 

[Ginger Beer]

Correct me if I'm wrong, and I'm going to use some easy numbers

Old V8 running at 20l/100km, running on a hwy at 100 kph for 1 hour = 20l ÷ 60 minutes = 333ml per minute 333 ÷ 60 seconds = 5.55ml per second

And with 3 psi of pressure can anyone see an issue with the lawn mower carb keeping up with that flow rate

Is my math off

In the end my LS1 runs about 3ml / sec

And if you use stoichiometric combustion for each cylinder in the equation, lets say it's a 6.0l for ease of math 6 ÷8 = 0.75 /14.5 = 0.05 ml per cylinder

A hidden set of injectors?

Yes it would struggle to get going, yes it would be slow, but by rights, it should would, albeit poorly

Meh

 

[Immortality]

First you would need to establish how well the OG carb/engine was tuned/AFR's to establish a genuine accurate fuel burn.

Then we would need to see actual fuel used on the lawnmower carb along with tune/AFR's to see if we get comparable numbers. There is no point comparing a stock 4bll carb (potentially) running at 13:1 cruise to the lawn mower carb running considerably leaner.

The video proves the engine will run on a much smaller carb (with some manipulation) but that is about all.

 

[Ginger Beer]

First you would need to establish how well the OG carb/engine was tuned/AFR's to establish a genuine accurate fuel burn.

Then we would need to see actual fuel used on the lawnmower carb along with tune/AFR's to see if we get comparable numbers. There is no point comparing a stock 4bll carb (potentially) running at 13:1 cruise to the lawn mower carb running considerably leaner.

The video proves the engine will run on a much smaller carb (with some manipulation) but that is about all.

And I think that was the point of it all, can it be done, not if was a good idea or not

It was a excellent fun hack IMO

I'm super impressed with his electronic vacuum bleed box he wired up

The guy has an active brain and seems to really enjoy just playing around for the sake of just playing around

His channel gives something to watch when all the other youtube channels I watch are between content

I'm looking forward to more build content from The Skid Factory, that big block Crown with a Harrop blower sounds fun, and that Nissan V8 in the old Skyline is just porn

 

[Fu Manchu]

Yep. People just fking around in their garage with cars. It’s always good to watch.

 

[Immortality]

That's something that pisses me off no end, **** in the US is cheap enough where you can do that stuff, here **** is expensive and hard to get a hold off making **** like this much less practical.

Those yanks don't know how good the've got it.