Motor Choice confusion Reigns....
02-07-2005 | 12:11 AM
#16
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Joined: Nov 2003
Posts: 507
From: London, UK
Re: Re: Motor Choice confusion Reigns....
Originally posted by Team-RTR
where abouts did you find the LC12PRO3 for $294?? thnx!
where abouts did you find the LC12PRO3 for $294?? thnx!
Hope that helps ... seems like a really awesome engine and very good price ... L8r
02-07-2005 | 09:14 PM
#17
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From: sydney
they seem to be ultra fast, but the only thing im iffy about is the fact that the piston and liner material is AAC, which if im not mistaken lasts only a very very sort time before a rebuild is needed, can anyone verify this?
02-07-2005 | 11:33 PM
#19
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From: London, UK
Originally posted by Team-RTR
they seem to be ultra fast, but the only thing im iffy about is the fact that the piston and liner material is AAC, which if im not mistaken lasts only a very very sort time before a rebuild is needed, can anyone verify this?
they seem to be ultra fast, but the only thing im iffy about is the fact that the piston and liner material is AAC, which if im not mistaken lasts only a very very sort time before a rebuild is needed, can anyone verify this?
However AAC does give better heat dispersion than ABC.....
02-08-2005 | 02:20 AM
#20
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However AAC does give better heat dispersion than ABC..... [/B][/QUOTE]
The expansion and contraction of the piston and sleeve are the
same given the same material.
Therefore less compression loss once at operating temperatures.
The expansion and contraction of the piston and sleeve are the
same given the same material.
Therefore less compression loss once at operating temperatures.
02-08-2005 | 02:50 AM
#21
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Joined: Jan 2004
Posts: 917
From: sydney
Originally posted by opposite lock
However AAC does give better heat dispersion than ABC.....
However AAC does give better heat dispersion than ABC.....
same given the same material.
Therefore less compression loss once at operating temperatures. [/B][/QUOTE]
but how does that result in shorter piston and liner life?
02-08-2005 | 05:21 AM
#22
Tech Master
Joined: Nov 2003
Posts: 1,811
From: lima-peru
Originally posted by Team-RTR
they seem to be ultra fast, but the only thing im iffy about is the fact that the piston and liner material is AAC, which if im not mistaken lasts only a very very sort time before a rebuild is needed, can anyone verify this?
they seem to be ultra fast, but the only thing im iffy about is the fact that the piston and liner material is AAC, which if im not mistaken lasts only a very very sort time before a rebuild is needed, can anyone verify this?
My M.Collari AAC engine is lasting me more than my ABC Sirio.
After six races it is still very tight and with perfect compression.
The catch with AAC is proper carburation. Since it takes more time to warm up, most people make mistake of tuning carb when engine not at right temp, so they tend to overlean engine.
AAC liner is hard chromed in inside the same as an ABC, so wear is the same, if properly carburated.
Yes you can replace AAC p/s. You can even replace it with a regular Sirio ABC. It's the same procedure, only difference is construction material.
The advantage of AAC p/s is that AAC sustains better high rpm, high temp operation, without loosing compression. Aluminum is a better heat conductor.
AFM
02-08-2005 | 05:39 PM
#23
I have found AAC to be good once it is at running temp. When I got a Sirio for the first time I had no end of trouble because I was turning the needles too soon. Now I know what I am doing I have been won over. The power is great & they seem to hold a tune very well & no problems at idle. This is even with the evo 1 composite carb. Now all I need is RB to offer an AAC version
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