How can this make enough vacuum for FI its on a 109 centerline? I know it works a friend of mine has a 383 suburban w/tbi and this cam. It actually works really well!

 

If I recall correctly, the ram jet cam is VERY mild. I certainly don't think I'd waste my time with that cam when there are so many more out there that will suit almost any application more appropriately.

 

This I realize but it might be just the ticket for a TBI 4x4 Tahoe.

 

OK, so 109 is the cenerline, what is the LSA, (lobe separation angle)? those are two different things.
I'd imagine it is 112 at least, being a stock GM cam. more LSA gives better vaccum and better idle.

 

The LSA is on the ramjet cam is 109. The reasion it works with FI is the duration is weak with 196*-206* and the lift is .431-.451 there is almost no (if any) over lap so you get good vaccum for the map sensor.The cam does work though for the price with the ramjet W/1.6roller rockers getting 350HP and the 383 W/1.5 stock rockers getting 325HP.