The motor is an all forged 355, specs in sig. It was originally built for ~150shot (rings gapped accordingly) which I planned on installing in about a month or so, but I want to explore all of my routes before I make any further purchases. The only things that have kept me hesitant on making the final decision about the nitrous is the cost of refilling the bottle + the fact the power isn't always there. I have been thinking about the cost of the nitrous setup (all safety features + cost of refills) and it is very comparable to a used powerdyne blower which I usually see go for around $1k ish. I've been reading up on superchargers for the past couple hours, and I know powerdyne doesn't have a good name since it's such a small blower, but with my CR (10.5:1), I obviously can't run very much boost. Im either looking at the 4.5# or 6# setup, but here are my concerns:

-10.5:1 CR

-22* Overlap cam {[(236+236)/4]-107}*2

- 7000rpm shiftpoint (too high for powerdyne?)

- It dynoed ~440rwhp ... Is the powerdyne even efficient enough to make more power on top of that?

I know my setup isn't ideal for a blower that's why I'm not looking at bigger blowers. So do you guys suggest I just go ahead and try to pick up a powerdyne or just stick with my original plans and spray it? Thanks!

 

Yer cam is a tad on the large side for boost, but more so the heads are too efficient for the powerdyne to be of any help in producing more power/boost. It will become more of a restriction than help. I dont think you'll be able to spin it fast enough for it to produce boost on your setup. PLUS, yer compression is too high. Its just a mess of a setup to add boost to, especially with a powerdyne. Ive had one with le2-like heads and a cc306 cam. It made boost and power, but it just wasnt an efficient setup and didnt put out what I was looking for. Now if you had a vortech s-trim that would be alright, but you've got to limit the boost to maybe 6-7 psi or you'll likely be spitting out head gaskets and damaging pistons/rings if your tune isnt spot on, or even if it is, it only takes one little hiccup and "boom". Its just not an ideal setup to add boost to IMHO, especially with a powerdyne.