Thread: Those of you with double roller timing chains....

the fillet on the aussie crank is smaller than the US crank, case in point after test fitting the JP on erics crank i can slip an .008 shim behind the sprocket....there is almost no chambfer on the JP crank gear...

no problem i'll just chuck it in my leblond

btw fer those of ya who run dbl's if i had a relatively cheap (and completly reversible) way to block the rear balance shaft bearing oil holes, how many of you would ditch the weight of the balance shaft? or would you still just pull the gear and leave it in with the 3 thou clearance blocking em?

yeah i'd guess so....you wouldnt have to remove the bearing or rear block cover with my idea...

btw i checked the JP set the riv's getting and the chambfer measures ~ 1/32nd across the flat i'll try to get a pic its def gonna have to be cut down to clear the cranks fillet

here's the chambfer on the JP dbl set for the aussie style crank

here's the US crank fillet

JP dbl on the left and rollmaster single on the right, notice the difference in chambfers


with the engine in car this is very difficult ot check but Yes the JP gear is seated all the way against the fillet (prussian blue confirmed that) not the gap...


in the end it seems the aussie cranks may be weaker if they dont have as strong (large) of a fillet....

thats all fer now folks...