im being told when you port you should pipe to get the full hp gain out of it? id you dont its really a waste of cash to port and runn stock pipe?

any in put?

I would say yes. If you have changed the exhaust port timing as well as increased flow throughout the motor, you will need a pipe to complement what has been done. Raising the port timing should raise your peak rpm. You want a pipe for that peak to achieve full benifits of the porting IMO.


Brian

folgers, did you, or are you going to change the port timeing, or just port work? to me port work alone is not at all a waste of cash, and the stock pipe(s) are fine. throwing aftermarket pipes on will give you the best performance available in your sled, but you run into tuneability issues as well, for everyday rideing. jetting issues are the most prominant, for day to day temps and so on.

Tested a number of pipe's on the series 3 800 stock/ported, and you know what, ski-doo stock single is very efficient, don't waste your time and money on the twin pipe's either, the little you gain can't justify the cost. There is a upgraded reed on the 04 800ho's that your 03 does not have , this is something you might want to look into......

The stock pipe on the series iii 800 motors is probably the best pipe out there for stock configuration. Now if you want to spend a little money the twin crankshops on a ported series iii motor rocks. From what i can tell so far the crankshop twins on the series iii is the first time i have seen the hp numbers close the the manufacturers hp claim, most of the time the aftermarket pipe manufactuers are full of s#%t when it comes to actual hp.

from what i have seen i have to agree with SPEED on this the aftermarket boys don't seem to be telling us the whole story,if you have ever been involved in dynoing a motor you will see they can do alot to effect the numbers they get ,but if you ever get a chance to stand next to an 800 hp bb screaming at 8000 rpm,WOW ,every performance guy should get the chance ,at least once in his lifetime,it truely is a rush

Folgers,
To answer your question, yes, pipes will help get the maximum amount of power available from a professionaly ported motor. Could you realize a boost in performance with an engine that has been "trail ported" and using a stock pipe? A lot of guys have done it and swear they have picked up big performance increases.

I think the question that should also be cosidered is "is it worth it"? And I think the answer then would have to depend on how and where the sled is being used. In competition, it's almost a requirement. On a trail, no, I don't believe it's worth it...unless you are one of those tinkerers that have the patience, and ability, to figure out what's going on when it decides it's not going to run right...which almost certainly will happen more often than with a stocker.

You have to wonder if the machine is capable of runing that much better, with no known drawbacks, why wasn't it done that way from the start. Today's engines are being sold in a very competitive market. I don't believe anyone can afford to be "conservatively" tuned anymore.

IMHO, if the thrill is gone, get a bigger one. Much simpler, and usually not as expensive as it sounds, especially when all costs are compared....