40 LA Changes
10-23-2002, 01:12 AM
#1
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40 LA Changes
Hi,
I've had FP, SF and FX engines. I just recently got my first LA.
Both a friend and myself purchased used 40 LA engines through eBay. A thorough examination of both engines showed that the case, sleeve and head are different.
The major difference being that my friends engine (which is well used and looks old) has 4 ports in the case/sleeve and mine (which looks run about 5 minutes total) has only 3.
We were wondering what the performance differences are between these designs? And, because the nickle is peeling off of his sleeve, if a 4 port design replacement sleeve can be purchased? I assume the replacement sleeves available at hobby shops is the newer 3 port design.
If a 4 port sleeve can not be obtained how will his engine run with a 3 port sleeve? Thanks for your time.
Regards,
Robert
I've had FP, SF and FX engines. I just recently got my first LA.
Both a friend and myself purchased used 40 LA engines through eBay. A thorough examination of both engines showed that the case, sleeve and head are different.
The major difference being that my friends engine (which is well used and looks old) has 4 ports in the case/sleeve and mine (which looks run about 5 minutes total) has only 3.
We were wondering what the performance differences are between these designs? And, because the nickle is peeling off of his sleeve, if a 4 port design replacement sleeve can be purchased? I assume the replacement sleeves available at hobby shops is the newer 3 port design.
If a 4 port sleeve can not be obtained how will his engine run with a 3 port sleeve? Thanks for your time.
Regards,
Robert
10-23-2002, 07:50 PM
#2
My Feedback: (11)
40 LA Changes
The O.S. Max .40 LA engines all run about the same, regardless of whether the older 4-port or the newer 3-port liner is installed. There's really no benefit to trying to get a 4-port liner for the newer engine because the case isn't cut out for a boost port.
It turned out that the basic timing of the engine didn't allow it to get much benefit from the boost port, so O.S. eliminated it.
It turned out that the basic timing of the engine didn't allow it to get much benefit from the boost port, so O.S. eliminated it.
