OnTheRoad
Collector of shiny things.
No.
Forced Induction
- Thread starter MechanicMatt
- Start date
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firebrick43
Life is all about big saws
Did not see anyone mention it but if you want to blow through a carb you can build a box around the whole carb and boost the whole enclosure. The carb will then see a similar relationship of pressure on both sides of the diaphragm compared to when running in a standard atmosphere. You do need a fuel pump (maybe a pressurized tank could be used for small runs??) and a regulator (fuel pressure has to be over boost pressure or fuel won't get to the carb) that adjust with boost pressure but the pressurized enclosure makes the carb part dirt simple. Typically little will need changed, just small adjustments on the h/l screws.
Except, unlike with a cam, you can double the power of a 2t with a decent pipe and port mod and still have it be very reliable and usable...
Yes
BigMoneyGrip
ArboristSite Operative
You can also double the power with a cam. Its all about optimizing. When we were racing karts, we'd take a 5hp Briggs and change the cam and carb and triple tha power.
OnTheRoad
Collector of shiny things.
It's not even debatable.
A pipe is not a supercharger. If you don't know that I am not sure what to say.
Forced induction puts pressure on the intake side of an engine. You are not going to make intake pressure with an exhaust pipe unless it's feeding a turbocharger. At best a tuned pipe will increase scavenging, but that's a long way from forced induction.
Has nothing to do with intake pressure. It causes pressure on the other side of the saw, forcing the fuel and air mixture back into the chamber, supercharging it in reverse. Only, unlike a supercharger, it adds a LOT of HP. Supercharging simply means adding more pressure than what is available as ambient. In this case it is around 7psi. But bear in mind while this wave is returning to the combustion chamber via the exhaust port, that the transfers are likely still open and pushing more air and fuel into the chamber as well. So the actual supercharging is much more than simply 7 psi.
Wow, that's getting into pipe territory
Well, except the part where you can't use it to power a chainsaw unless you want to carry a cart around with ya
OnTheRoad
Collector of shiny things.
If you think that is supercharging, I'm done with this conversation.Has nothing to do with intake pressure. It causes pressure on the other side of the saw, forcing the fuel and air mixture back into the chamber, supercharging it in reverse. Only, unlike a supercharger, it adds a LOT of HP. Supercharging simply means adding more pressure than what is available as ambient. In this case it is around 7psi. But bear in mind while this wave is returning to the combustion chamber via the exhaust port, that the transfers are likely still open and pushing more air and fuel into the chamber as well. So the actual supercharging is much more than simply 7 psi.
Mastermind
Work Saw Specialist
Y'all are crazy.
Simple.
Simple.
There is going to be two different sides to this conversation so lets get it over with and move on.
On one side people will call tuned intake/exhaust a form of supercharging and the other side is going to insist that supecharging is a means of mechanical pressurizing the intake only. Both could be considered correct.
Remember when Dodge first offered the Ram Charger or the Air Grabber? It was a hood scoop that opened at speed in an effort to increase the plenum pressure. The term supercharging can be refered to any means by which the intake plenum/cylinder charge is pressurized above normal operating means.
Tuned intake and exhaust can offer significant gains in peak torque but ususally at the cost of torque from some where else on the curve, especially on single cylinder engines.
On one side people will call tuned intake/exhaust a form of supercharging and the other side is going to insist that supecharging is a means of mechanical pressurizing the intake only. Both could be considered correct.
Remember when Dodge first offered the Ram Charger or the Air Grabber? It was a hood scoop that opened at speed in an effort to increase the plenum pressure. The term supercharging can be refered to any means by which the intake plenum/cylinder charge is pressurized above normal operating means.
Tuned intake and exhaust can offer significant gains in peak torque but ususally at the cost of torque from some where else on the curve, especially on single cylinder engines.
Well, to be fair, the poor guy was confusing superchargers with supercharging
