Pipe size and power curve
05-31-2003, 02:57 AM
#1
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Pipe size and power curve
Another question, Macs makes a 7.5cc pipe for 40-50 size engines. They also make a 8.5cc pipe for 45-60 size engines. What would be the performance difference between these two pipes on a 50 size engine? Thanks, Mike
05-31-2003, 03:31 PM
#2
Pipe size and power curve
I'm not sure what the performance difference would be, but your .50 is 8.5cc. I couldn't imagine running that 8.5 pipe on a 60 which is 11cc. At the same time, the 7.5 pipe is probably a little on the small size for your .50 being as how they make an 8.5 pipe.
John
John
05-31-2003, 04:43 PM
#3
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60?
JWN,
A .60-.61 is a 10cc engine.
Most companies make pipes that are usable for a range of engines. A .60-.90, a .40-.50... An 8-11cc pipe would entertain both a .49" (8.0cc) and a .68 (11.1cc).
If that is not a legitimate range, what is?
And yes, when there is a range involved, engines in the top do tend to put the pipe at its limits.
Sincerely,
A .60-.61 is a 10cc engine.
Most companies make pipes that are usable for a range of engines. A .60-.90, a .40-.50... An 8-11cc pipe would entertain both a .49" (8.0cc) and a .68 (11.1cc).
If that is not a legitimate range, what is?
And yes, when there is a range involved, engines in the top do tend to put the pipe at its limits.
Sincerely,
05-31-2003, 07:33 PM
#4
Re: 60?
Originally posted by DarZeelon
A .60-.61 is a 10cc engine.
A .60-.61 is a 10cc engine.
Most companies make pipes that are usable for a range of engines. A .60-.90, a .40-.50... An 8-11cc pipe would entertain both a .49" (8.0cc) and a .68 (11.1cc).
If that is not a legitimate range, what is?
I personally would run a pipe sized specifically for a .60 instead of buying one that works on a wide range of engine sizes. Pipes are critical to setup properly. Why get into a "one size fits most" situation when there is a better alternative? If I'm installing a pipe on a model, it's because I want the most performance as possible. To me, there is no room for compromise.
And yes, when there is a range involved, engines in the top do tend to put the pipe at its limits.
John
05-31-2003, 09:12 PM
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Pipe size and power curve
Would have to agree with the previous post. Match the engine to the pipe. We are very much into pipes with marine engines. You can "pipe up" use a larger pipe in some instances but you run them longer if you do and low end needle is tough to get sometimes. We never pipe in a range to get max. power and output.
Curt
Curt
