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Frank bierce

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I opened the chamber on the bb hybrid and got compression down to 205lb,it helped but still needs less.

The oem hybrid is a good bit ahead still

Oem definitely sound more throaty...compared to the tinny sound of the am cylinder. Did you try the am without any work? Curious what kind of a difference you have made
 

jmssaws

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Oem definitely sound more throaty...compared to the tinny sound of the am cylinder. Did you try the am without any work? Curious what kind of a difference you have made
No I didn't try it stock.
It doesn't run bad it just doesn't run like the oem saw.
I'll get compression down to where the oem saw is and try the exhaust and transfers at the same height and see how it does then.
 

X 66 stang347 X

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So you want the bb saw around 175? Is that due to the sump volume on the 044. A ported 460 you run around 200
 

Frank bierce

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No I didn't try it stock.
It doesn't run bad it just doesn't run like the oem saw.
I'll get compression down to where the oem saw is and try the exhaust and transfers at the same height and see how it does then.
I'll be watching :)
 

jmssaws

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So you want the bb saw around 175? Is that due to the sump volume on the 044. A ported 460 you run around 200
The oem saw is bout 180-185 but I was trying to get 190.
I think compression will hurt the bb saw more simply because the bore is bigger.
Might need less on it than the oem saw.
The bb saw isn't timed ideal either.
 

Definitive Dave

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I opened the chamber on the bb hybrid and got compression down to 205lb,it helped but still needs less.

The oem hybrid is a good bit ahead still


I am trying to keep this straight in my head :)
Both are an MS440 base saw right?
OEM is a Stihl 046/MS460 cylinder and the AMBB is an 046/MS460 BB at 54mm?
 

jmssaws

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MS440 double big bore :)
Make that puppy run like an 066 with the weight of the 044, that would be sooooo sweet!!
That's gonna be difficult,hell I can't make it run with a 044 hybrid much less a 066. Lol
I like your thinking though dave.
Need to find a bigger carb
 
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