(chevelle @ Sep. 16 2006,19:48)
(Quasar @ Sep. 16 2006,18:42) I'm currently using 19/43 gearing (3.815% taller than stock) which does require 2 additional links be installed making my chain 114-links. My engine is using higher compression JE pistons and Web .378"/.330" cams, so I can make good use of the taller than stock gearing.
does a 19 tooth bolt on ?
A 19-tooth bolts on no different than a 17 or 18-tooth sprocket and requires no cover modification. Just keep in mind that you will likely need to add 2 additional links to your chain depending upon what rear sprocket you use. You can use 19/41 gearing with a stock length chain but that's rather tall gearing (8.289% taller than stock), so unless you have motor work or have installed a turbo, you'd need to also increase your rear sprocket a bit to reduce the tall gearing. Hence, the need to add 2 additional links to the chain.
For those interested:
19/40 is 10.526% taller than stock gearing
19/41 is 8.289% taller than stock gearing
19/42 is 6.052% taller than stock gearing
19/43 is 3.815% taller than stock gearing
19/44 is 1.579% taller than stock gearing
19/45 is .657% shorter than stock gearing
19/41 thru 1944 gearing all works with a chain that is 2 links longer than stock on a stock arm.
The larger sprockets are definitely easier on the chain and sprockets and add to chain and sprocket longevity. I'm definitely getting extended chain life with the larger sprockets. I have nearly 16,000 miles on my D.I.D. X-ring chain and there are no signs of ANY kinked links.