I Just Got A Huge Assortment Of Chrysler Parts 2 Days Ago, And In That Was Some 125 And 140 Horse Carbs. So Would The Larger Carbs Make 105 Have More Hp?
I Don't Understand What Makes The Hp Rating For The All Of The 72 Models, Cause All The Motors Have A 96.55 Disp And 3.31 Bore And 2.80 Stroke. What Is Different Other Than The Carb.
Ok,correct Me If I'm Wrong. Doesn't The Exhaust Exit The Passenger Side Of The Engine, Which Is Basicly Hollow, Then Down The Engine Then Out The Trim Tab/exhaust Hole? The Only Ports I Have Seen Is The Ones At The Base Of The Cyc. they just look like holes , no exhaust runners. is that the exhaust port? ive got a 140 for parts will look and see if they are the same.
what Roscoe is talking about is WHERE the ports [round holes ]are located in respect to the cylinder, and sometimes size of the ports. That is what times the motor as far as when the fuel comes in and the exhaust goes out. It's the cam shaft of a two stroke so to speak. By changing the porting ,you change the power band ,to a certain extent fuel mileage,and amount of power. It's a lot more than just bolting up a bigger carb and getting more hp. Hope this helps. MOPARMAN
While the 105 is ported differently than the larger horsepower engines, if you change the manifolds you can install the larger 140 TC carbs. You will gain a few horsepower due to increased breathing BUT only about 5. To get more, you need to open the reed stops a bit, port the engine for better breathing and raise compression ratio. Even then, do not expect more than 120.
BTW: The original 105 was re-rated in the 1980s to 90 HP.
