Lawn Care Forum banner
21 - 40 of 42 Posts

· Registered
Joined
·
1 Posts
Originally Posted by lawnmaniac883
A) You would need a fuel injected engine I believe that your 25kaw isnt.

Then added to by Dirty Water
Nonsense, people have been turbocharging carberuated engines since turbochargers were invented...Both draw through and blow through designs.How many turbo's have you installed??? I've installed a handfull.


Turbo charging a two stroke generally should work as explained but the reson why a turbo works and not a supercharger like was originally asked about is cos a turbo maintainsa lot more pressure in the exhaust whereas a supercharger running off a simple drive belt wont. This means that when the fuel/air enters the upper half of the cylinder on the down stroke it has abnormally high pressure and a much larger amount of fuel/air will be forced out of the exhaust pipe before the compression stoke without being burnt. This wont happen with a turbo as there will be high pressure in the exhaust pipe as well so a larger amount of fuel/air will stay in the cylinder to be ignited. Any positive effects of adding a supercharger as opposed to a turbocharger will be very small and will require large amounts of fuel severly reducing efficiency and probably causing chronic back firing.
 

· Registered
Joined
·
547 Posts
Yeah.
You NEED forged internals for a blower/turbo setup. And head STUDS.
Otherwise they will just melt. Air-cooleds run hotter than liquid-cooled anyways.
Also, think about where the debris will go when these things let loose.
I see shrapnel penetrating the backs of LCOs everywhere, messing up the advertising on their t-shirts.
 

· Registered
Joined
·
3,049 Posts
Jon, the only problem with putting a turbo on a carb'd small engine is theres no way to supplement fuel. The way we do it with cars is by using a very powerful fuel pump and a boost referenced regulator. No way to do that with a small engine set up since they dont run a fuel pump. Now then you could always put a single injector in the intake duct and supplement it that way.

Still too much work for a mower :D
Actually it would not be very hard. You would probably need to put a different fuel pump on it to overcome the pressure in the bowl. On the kawasaki's it would be easy to get the vent hooked up so you dont need a carb box or what not. The external vented ones just run a tube...the internal vented will be good as long as long as your intake is sealed up. What this does is pressurize the bowl to the same level as the air flowing through the carb.

Grab a book by Corky Bell. That should get you started if you wanna learn more about turbos.
 

· Registered
Joined
·
1 Posts
Just take a 900cfm weed blower connected to your carb/airbox. The are now using them on karts. Add a bigger jet, bigger header and pipe (make it yourself) go to a K&N type/shaped filter maybe a little timming chang and slightly hotter plug to handle the fuel, remove the governer.
Polish everything inside it and open up the ports and polish everything.
Completely go through the carb (polish it) and make sure everything is correct (float height, Gaskets cut to openings correctly, jet seat, spring tension depending on carb and application? Go to bigger carb?

Off the subject,
We are running a Clone Kart class here and the stock 6.5 (Blue Motor) with an adult setup turns well over 9.5hp These seem to be real good little engines. Dual Bearing cranks and all. Engine purchased at the track would be @$150
Similar Briggs and Honda OHV Engines can produce well over 38HP without a turbo! But the cost is to the moon. Same could be done with the Jangdong at a fraction of the price.

This is the same engine sold at harbor freight. Jangdong I think its called?
It also has the same mounting pattern as the Briggs engines.


Racer11x
 

· Registered
Joined
·
3,580 Posts
Can someone explain if you can put a turbocharger or supercharger on gas lawn mower eninges? There are a few turbo diesel engines for lawn mowers. I'm wondering, because I would like to increase my HP on my 25 HP Kawasaki. Thanks...
I'm sure if you can think of it , and have the engineering skills, money, parts, tools you can turbo charge just about anything.

Over the years their have been several failed attempts to offer turbo diesels in midmount commercial ZTR's. Diesel engines have the thermal heat advantage, respond to turbo charging much better than gasoline engines. We only need to look at the few manufactures whom have years of experience, and have failed to offer a truly cost effective turbo diesel ZTR, so why would they even mess with a gasoline engine:hammerhead:

A turbocharger would add more cost to the already expensive gasoline or diesel engines
 

· Registered
Joined
·
1,600 Posts
Your right, Imagine heading across a customer's yard and sucking the grass right up by the roots leaving bare dirt.
Funny you should mention something like that. While at the Mow In back in Oct in WV, I was showing a member how fast a Power Brush/Broom normally turned. And then ran it up to full power on the 35-G. Now imagine a sweeper nearly 6 inches above the ground pulling up debris, grass, and dirt. And it ( brush ) was only turning 1.5 times normal. You don't want to be near the front of it when it's down. :usflag:
 

· Banned
Joined
·
22,465 Posts
Yes, but in terms of expense...

The first things I would consider are less expensive upgrades that also result
in more power and better fuel efficiency, things such as:

A 10.2 mm spark plug wire, die-electric grease all the nipples and fittings.
A double platinum spark plug.
A high performance coil.
A high performance air intake.
Synthetic oil.
Super unleaded fuel (for non-diesels).

The problem is...
With the exception of the plug, the die-electric, the oil and the fuel,
nobody seems to make these parts, either.

They just don't make high performance parts for mowers, the few places that do make them are for racing applications,
these racing parts aren't made to withstand daily or long-term use, the few parts I have found took a lot of time cross-
referencing and studying up, and I'm not much for major modifications.

As a rule if I want more power I turn it up, thou it eats fuel and it's not good for the engine.
 

· Registered
Joined
·
5 Posts
Can someone explain if you can put a turbocharger or supercharger on gas lawn mower eninges? There are a few turbo diesel engines for lawn mowers. I'm wondering, because I would like to increase my HP on my 25 HP Kawasaki. Thanks...
I'm building my 6 year old a turbo charged riding lawn mower. Turbo is of a Chevy cruz.i ported the head. Custom made manifold. Welded the waste gate closed.
Can someone explain if you can put a turbocharger or supercharger on gas lawn mower eninges? There are a few turbo diesel engines for lawn mowers. I'm wondering, because I would like to increase my HP on my 25 HP Kawasaki. Thanks...
Can someone explain if you can put a turbocharger or supercharger on gas lawn mower eninges? There are a few turbo diesel engines for lawn mowers. I'm wondering, because I would like to increase my HP on my 25 HP Kawasaki. Thanks...
I'm building a turbo charged riding lawn mower for my 6 year old. Turbo off a Chevy Cruz. I hacked off the manifold. Fabricated a flange to pipe. I will use a single injection
stand alone system. Pickup off the flywheel. Knife edge crank,forged piston and rod. ACL RACING BEARINGS. Stand alone water cooling system to turbo.i removed all factory pulley system. Axle flip in the front. Lowerd the back 3 inches.
 

· Registered
Joined
·
267 Posts
I'm building my 6 year old a turbo charged riding lawn mower. Turbo is of a Chevy cruz.i ported the head. Custom made manifold. Welded the waste gate closed.


I'm building a turbo charged riding lawn mower for my 6 year old. Turbo off a Chevy Cruz. I hacked off the manifold. Fabricated a flange to pipe. I will use a single injection
stand alone system. Pickup off the flywheel. Knife edge crank,forged piston and rod. ACL RACING BEARINGS. Stand alone water cooling system to turbo.i removed all factory pulley system. Axle flip in the front. Lowerd the back 3 inches.
I'm building my 6 year old a turbo charged riding lawn mower. Turbo is of a Chevy cruz.i ported the head. Custom made manifold. Welded the waste gate closed.


I'm building a turbo charged riding lawn mower for my 6 year old. Turbo off a Chevy Cruz. I hacked off the manifold. Fabricated a flange to pipe. I will use a single injection
stand alone system. Pickup off the flywheel. Knife edge crank,forged piston and rod. ACL RACING BEARINGS. Stand alone water cooling system to turbo.i removed all factory pulley system. Axle flip in the front. Lowerd the back 3 inches.
What engine are you putting in said lawnmower? And this is for a 6 year old?
 

· Registered
Joined
·
5 Posts
Actually it would not be very hard. You would probably need to put a different fuel pump on it to overcome the pressure in the bowl. On the kawasaki's it would be easy to get the vent hooked up so you dont need a carb box or what not. The external vented ones just run a tube...the internal vented will be good as long as long as your intake is sealed up. What this does is pressurize the bowl to the same level as the air flowing through the carb.
Well luckily I got 30 years of honda building and engineering degree.. I hold 3 patents on lowrider suspension and designed a flat plane camshafts fir vtec engines. I thought about the carb issue. I'm looking for a single injected throttle body. I got a titanium rod. Bored to 90 mm. I build 1000 hp 4 cylinders. 1 cylinder. No problem. Lol. Way back when I put NOS on a B&S 5 hp motor. Lol. Blew parts everywhere. It ran on a 75 dry for 4-5 sec and puked


Grab a book by Corky Bell. That should get you started if you wanna learn more about turbos.
 
21 - 40 of 42 Posts
Top