I’ve a 85 EZGO golf cart that i’ve installed a lift kit on. It has agressive oversize tires so it’ll never see a golf course again.
I’m needing a muffler but the greedy EZGO folks think a muffler ought to cost 130 bucks.
The lowest cost one I can find still costs 117.00.
So I’m looking into customizing a aftermarket lawn mower muffler for it. I want it quiet without sacrificing hp.
In order to find the right muffler I’ll need to know the approximate hp of the 244 Robin cart engine. This is, I believe, the same engine used in a Polaris Trail Blazer atv.I can’t find any specs that include hp and most garden tractors and mowers are rated in hp.
I assume its going to be air cooled ?
I’ve seen 250cc 2 stroke bikes that churn out around 30 horses, but then there is a good airflow over the engine.
I think that getting 10 horses out of it would be very possible, maybe you’d need a change of exhaust.
This might helpIts a forum for souping up your golf cart.
Something for everyone I guess.
I just googled 244cc robin, and got a lot of hits in there. Seems like it’s a pretty underpowered engine, but I didn’t find any actuall specs.
High HP two smokes rely on thier expansion chambers for a mild supercharging effect. This occurs only over a fairly narrow rpm band.
Effective silencing pretty much ruins the action of the expansion chamber.
To work, the expansion chamber must have high exhaust velocity during blowdown, which a silencer will try to smooth out to a steady flow. After the intake port closes, there must be significant reversion, which the silincer will again try to fight.
Aftermarket exhaust systems tend to be integrated expansion chamber/silincers tuned to work togethor, and they tend to be loud. They are expensive as they often require wiered shapes, and are usually made of at least stailess steel, and often titanium, which are somewhat expensive, and much harder to deal with from a manufacturing standpoint.
I’ve fabricated similar things, and can assure you it is about 20X more time consuming and difficult than people who haven’t done it would imagine. If there is aftermarket support for you application, you will be time, and likely money ahead to buy vs. make.
I’ll add a wee bit to what Kevbo already said. The two cones in an expansion chamber set up an echoing of pressure waves inside the chamber, so that the next charge of exhaust blows in between pressure waves, and it’s sucked out. If you need to muffle, you tack on the sneezer after the chamber, not in it.
Don’t go for a cheap lawn mower muffler if you care about power.
Not much fab to do here.
The body of the muffler is 1/8 " looks like mild steel.
Just need to cut the bracket off the old muffler and weld to the new one.
If I can figure an easy way to open the old muffler I might be able to repair it.
All that is wrong is the baffle has come loose and dropped down pluging the exhaust port.You can hear it clunking as you turn muffler from side to side.
I’m thinking a couple of strategic hacksaw cuts and weld it back in place.
A CR250 Honda dirt bike has around 45 HP but you probably won’t find any 2 stroke 250 engine that can beat that.