Axtell cams 247/363 12-94

Jugs_S

Jugs_S

Senior member
Location
Sydney
Hi just doing a cam timing check on a set of Axtell cams grind 247/363  12-94

dose anyone have the spec sheet. I have found two references on the forum A)http://www.laverdaforum.com/forum/index.php?topic=50149.0
B) http://www.laverdaforum.com/forum/index.php?topic=42394.0

with slightly different spec.

I'm looking for the opening closing or lobe centres for this grind.

Thanks

Jugs_S
 
Funny you ask Jugs, I'm just this minute sitting looking at a print out of a Degree Wheel that Cam posted some time ago with the lay out for the Axtell grind.
Once I get my motor back from having new little end bushes fitted I'll be ready to reassemble and plan to check my Axtells for accuracy.
So what I have is IN open 18.5?  closes 48.5,  EX open 51.5?  closes 15.5?
 
Motoddrob

Thanks marked on the cam is Axtell 247/363 then 12-94 on the other thread it states 247/363 then #80-03
Do you (any one) know what the second set of numbers represent ? the other thread gives the lobe centres as-
Int 105 Exh 108

but when I calculated the lobe centres for 18.5 BTDC 48.5 ABDC IT = 103.5 (Max Lift) not 105

18.5+ BTDC
180.0
45.5= ABDC
244.0/2=  (Duration)
122.0 

122.0-
18.5 =
103.5  ML (lobe centre) ATDC
 
Axtell.jpg


Forgive my hen scratches on the spec sheet. Hope this helps.  I think the serial # may be the manufacture date...if so, could be some change in the grind from 1994 and 1980..who knows? Lance W. was involved with Axtell in the cam design..he will not be telling anyone (RIP)..maybe Wolfgang knows?
 
Ok found the obviousness mistake inlet close is 48.5 not 45.5 as I had in the calculation. There for Max lift is 105 as advertised. Also who ever made the chart incorrectly stated. 040" (.25mm) when 040" is 1.1mm.

When I check all the open and close at 1.1 depression. it started to line up and make sense.

Jugs_S
 
Yes.... .040" for checking the cam timing and seat duration..or 1.016mm not .25mm

Valve clearance cold .25mm or .010"

The original marks from Axtell looks like they wrote .040' (.25mm) under the word HOT which should be up as valve clearance spec.
 
You must log in or register to reply here.
Back
Top