433 jug id

sled-ex

sled-ex

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Is there some kind of listing of 433 cylinders?
What does the letters mean?
How many is there?
Here`s a few

SF= Ex 76-81 48hp
SD= Stx 76-77 52hp
WB= Sw? piston port
XA= Gpx 74 50hp
XB= Gpx 75?
RB= Gpx?
 
sled-ex said:
Is there some kind of listing of 433 cylinders?
What does the letters mean?
How many is there?
Here`s a few

SF= Ex 76-81 48hp
SD= Stx 76-77 52hp
WB= Sw? piston port
XA= Gpx 74 50hp
XB= Gpx 75?
RB= Gpx?
Click to expand...

My 78 ex 440, has the SF jugs, and my 77 Kaw/Snojet has the SD jugs. Are the SD jugs ported differant to achieve more HP?
 
sled-ex said:
Yes, there is a small difference in the porting
Click to expand...
so for next years racing, I should use the SD cylinders on my 78 oval racer, right? Are the heads the same on say the SD and SF cylinders? Is the timing the same, on a sd and a sf motor? Sorry for all the questions. Thanks
 
wls said:
so for next years racing, I should use the SD cylinders on my 78 oval racer, right? Are the heads the same on say the SD and SF cylinders? Is the timing the same, on a sd and a sf motor? Sorry for all the questions. Thanks
Click to expand...

Yepp, go with the SD`s and do a little grinding in the engine case/ Cylinders.
The heads are the same, Dont know about the timing.
 
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