[ponchjoe]

Originally Posted by Jay S

Both the 702 and the 703 will quit making power at or before 5000 in the bigger engine. That Ultradyne 288/296 is rated at .0045” tappet, the Lunati is an advertised rating that is more of an acts like number rather than a specific tappet lift, it isn’t super easy to compare them using advertised numbers.

Lunati 703 is 273/[email protected]”

The Ultradyne I mentioned is 282/[email protected]”

The 702 is 267/[email protected]

The Voodoos have some extra assymetric's above .050” lift that older Ultradyne does not have.

With extra cubes and compression and that 288/296 Ultradyne’s LSA widened out to 112 LSA it idles pretty similarly to the 703 but out runs it everywhere, pull hard to 5500 and ifs quite a bit more pump gas friendly. Operates quiter also, since the profiles are not quite as aggressive. The LSA of the 703 is 110, it really needs to be wider to work well with the bigger cubes.

I would have preferred the 703 if you would have stuck with the small crank.

I anticipate compression about 9.6 or so if that matters. Although I keep getting over 10:1 when using calculators. DSS recommended 18cc dish to get to 9.6 so compression height must come into play that the calculators don’t know? I’m a little over my head on that stuff. Anyway, I will call Bullet and ask them for a recommendations.
Thanks again