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-   -   Compression Question???? (http://www.classicseacraft.com/community/showthread.php?t=21007)

76Red18 11-25-2009 04:52 PM
Re: Compression Question????
 
Good idle on this style motor is attributed to all 6 butterflies being completely closed and a slightly rich idle air adjustment. I shoot for 600 rpm in gear.

thehermit 11-25-2009 05:19 PM
Re: Compression Question????
 
Quote:
Our 60 degree, or properly named "Eagle Series" motors are lower compression. The one in the pictures appears to be a 90 degree cross flow which can have upwards of 140. The 60 deg 175 has different carbs and porting, not sure on compression numbers. The 60's also use o-rings for head gaskets. If you pull the heads, make sure to apply sealer to the bolts and a thin ring of sealer around the water ports making sure to keep it out of them.
Red...my 225 is a 90 degree V6 Looper :D

gofastsandman 11-25-2009 06:11 PM
Re: Compression Question????
 
Have you heard about going one or two jet sizes up in the #2 cyl on the 90 deg loopers. Heard that`s the thing to do from Monty Racing.

76Red18 11-25-2009 06:33 PM
Re: Compression Question????
 
Sorry Hermit, I should have paid closer attention to all the photos. Sandy's and mine are the 60's. Your slightly domed pistons certainly are looper.

thehermit 11-25-2009 08:52 PM
Re: Compression Question????
 
Quote:
Have you heard about going one or two jet sizes up in the #2 cyl on the 90 deg loopers. Heard that`s the thing to do from Monty Racing.
OK..I'm all ears here...whats this all about?

gofastsandman 11-26-2009 10:55 AM
Re: Compression Question????
 
They said that the #2 is a cause of failure due to lean out. Something about the design of the motor. Said that they recommend this mod when rebuilding them.Monty Racing 954-328-4445
GFS


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