Another reason to run tight lobe centers, like 116-118.Most cam companies either don't have access to that type of lobe, or don't get the reason to do it.
It IS the opposite of a N/A car for sure. You need more in and out on them, and both valves open help draw in the fresh charge. If used in the rear mount set up massive amounts of hot spent gas backs up to the motor, It would be easier to go back into the motor than spool the turbo.
Someday call Bullet Racing cams and tell them you have a rear mount set up and see what they said.
They were the only company that figured it out ever.
At 1st it was speculation on my part, then after 5-6 custom grinds I could see the benefit. Beware that a 114 and higher lobe will run out of steam and not tach to 8,000 , but you shouldn’t need to if you are @ full boost around 2500 to 3000. The less compression your combo has, the more overlap, the bigger the turbo, the longer it will take to boost.
You do have a dam big turbo!(for a rear mount). Depending on the trim, your 76 in your configuration is good for 850 to 1000 hp. On smaller engine combos, below 6.0 I usually would run smaller twins.
The a/r's are tinny on the rear mount turbo's compared to even a small 4cyl Honda front mount. You may decide to go smaller or larger on the A/R to help tune the boost in to a usable rpm for your combo.
I hope this helps.Yep, its controversial but hey, you got a rear mount set up that is controversial to begin with.
Hang in there and keep up the good work.