Compression Question????

[76Red18]

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]

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

[gofastsandman]

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]

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]

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]

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