back on topic im kinda not sure if the whole idea will work but as if followed the thread it does have some creative thinking. after all alot of peoples stupid ideas turned into something amazing. Id love to see some dyno results on this setup as i have an unconnected air pump as well. If it doesnt help on the truck i could always pull it off and hook it up to my riding lawnmower lol.

 

Now that is some creative thinking!

 

Someone needs to do the math to figure how many air pumps it would take just to supply enough air to run the engine without boost. I'm thinking that would put things into perspective.

 

You would need a couple extra 351s, running @ 3,000rpms turning nothing but smog pumps to fill the bill!

 

after putting on the fast food trash bin air scoop i had a lot of drag so i added some 1976 trans am air ducts on the side.

i noticed a seat of the pants improvement but i still want to have it put on a dyno.

the air coming from the heater blower and cowl inlet really helped me in a street race on friday night.

i put fan on high when i hit second gear and blew past that pinto wagon like he hit the brakes.

everyone at the walmart parking lot wanted to see what i was running but i said "no way!".

 

i want to see the results to this whole air pump idea.

 

just do it yourself and you will see if it is worth it.

 

I dont know what the CFM of the Air pump would be at any particular RPM, but isnt the Turbo and Supercharger rated in the 1000 CFM range? I cant imagine the air pump exceeding 100 CFM at any RPM (something to make it worth while I would think), much less 50 CFM. Anyone know the rated CFM of the air pump?

 

Maybe we got this all wrong... I think the way it is supposed to work is since the air-pump cannot supply enough air for the engine to run, the vacuum created in the intake will cause the pump to spin and "drive" the crankshaft via the V-belt? That's gotta be worth 50 HP... My 460 has two air-pumps; I'm gonna to give it a try. An extra 100HP would be nice...

 

It is not worth anything. It does not work like that. There would be only be any significant vacuum in the manifold at idle and slow cruising speeds. At WOT, the manifold is pretty much at atmospheric pressure. The smog pumps won't do anything. Also good luck controlling engine speed when you have two 1" holes poked into your manifold. The components of the air pump would let go way before 50HP, they'd be lucky if they would hold 10 HP.

 

i have an extra smog pump from when i changed engines, im going to set it up on my 19hp briggs and stratton riding lawnmower which i use as a toy as i think it could be advantageous on it. Ill have a unique supercharged lawnmower lol.

 

maybe you could plumb it somewhere where it would do good...maybe to cool your brakes? doubt it would push enough air though

 

You are going to want it blowing into the carb, and you will need to a put a little tube from the pressure side of the pump to the top of the gas tank, so the carb can still get fuel under boost.

It would be easier to put the pump after the carb, but smog pumps don't take well to gas.

 

i dont fully understand about the little tube you speak of. do you mean a little tube from the smog pump output into the gas tank? i dont fully understand this idea

 

You put the output of the smog pump to the carb. Most lawn tractors have gravity fed fuel systems. So atmospheric pressure. If you were to just hook the smog pump upto the motor, whenever you would get into boost, the fuel would stop flowing. So you splice a little line into the output of the smog pump, and attach it to the top of the gas tank. That way it matches the fuel pressure to whatever air pressure the carb is seeing.